1 tbd Sun Microsystems, Inc.
4 2.6.16.54-0.2.5 (SLES 10),
5 2.6.18-53.1.21.el5 (RHEL 5),
6 2.6.22.14 vanilla (kernel.org).
7 * Client support for unpatched kernels:
8 (see http://wiki.lustre.org/index.php?title=Patchless_Client)
9 2.6.16 - 2.6.21 vanilla (kernel.org)
10 * Recommended e2fsprogs version: 1.40.7-sun3
11 * Note that reiserfs quotas are disabled on SLES 10 in this kernel.
12 * RHEL 4 and RHEL 5/SLES 10 clients behaves differently on 'cd' to a
13 removed cwd "./" (refer to Bugzilla 14399).
17 Description: add recount protection for osc callbacks, so avoid panic on shutdown
21 Description: sanity test 65a fails if stripecount of -1 is set
22 Details : handle -1 striping on filesystem in ll_dirstripe_verify
27 Description: ASSERTION(CheckWriteback(page,cmd)) failed
28 Details : badly clear PG_Writeback bit in ll_ap_completion can produce false
31 Severity : enhancement
33 Description: Update to RHEL5 kernel-2.6.18-53.1.21.el5.
37 Description: do not process already freed flock
38 Details : flock can possibly be freed by another thread before it reaches
39 to ldlm_flock_completion_ast.
43 Description: LBUG during stress test
44 Details : Need properly lock accesses the flock deadlock detection list.
48 Description: oops in page fault handler
49 Details : kernel page fault handler can return two special 'pages' in error case, don't
50 try dereference NOPAGE_SIGBUS and NOPAGE_OMM.
54 Description: timeout with invalidate import.
55 Details : ptlrpcd_check call obd_zombie_impexp_cull and wait request which should be
56 handled by ptlrpcd. This produce long age waiting and -ETIMEOUT
57 ptlrpc_invalidate_import and as result LASSERT.
59 Severity : enhancement
61 Description: Update to RHEL5 kernel-2.6.18-53.1.19.el5.
65 Description: enable MGS and MDT services start separately
66 Details : add a 'nomgs' option in mount.lustre to enable start a MDT with
67 a co-located MGS without starting the MGS, which is a complement
68 to 'nosvc' mount option.
72 Frequency : after recovery
73 Description: precreate to many object's after del orphan.
74 Details : del orphan st in oscc last_id == next_id and this triger growing
75 count of precreated objects. Set flag LOW to skip increase count
76 of precreated objects.
80 Frequency : rare, on clear nid stats
81 Description: ASSERTION(client_stat->nid_exp_ref_count == 0)
82 Details : when clean nid stats sometimes try destroy live entry,
83 and this produce panic in free.
87 Description: Stack overflow during MDS log replay
88 ease stack pressure by using a thread dealing llog_process.
92 Description: wait until IO finished before start new when do lock cancel.
93 Details : VM protocol want old IO finished before start new, in this case
94 need wait until PG_writeback is cleared until check dirty flag and
95 call writepages in lock cancel callback.
97 Severity : enhancement
99 Description: using special macro for print time and cleanup in includes.
103 Description: mds_mfd_close() ASSERTION(rc == 0)
104 Details : In mds_mfd_close(), we need protect inode's writecount change
105 within its orphan write semaphore to prevent possible races.
109 Description: Obsolete CURRENT_SECONDS and use cfs_time_current_sec() instead.
113 Frequency : rare, on shutdown ost
114 Description: don't hit live lock with umount ost.
115 Details : shrink_dcache_parent can be in long loop with destroy dentries,
116 use shrink_dcache_sb instead.
120 Description: don't panic with use echo client
121 Details : echo client pass NULL as client nid pointer and this produce null
126 Description: fix build on ppc32
127 Details : compile code with -m64 flag produce wrong object file for ppc32.
131 Description: add message levels for liblustreapi
135 Description: fix for occasional failure case of -ENOSPC in recovery-small tests
136 Details : Move the 'good_osts' check before the 'total_bavail' check. This
137 will result in an -EAGAIN and in the exit call path we call
138 alloc_rr() which will with increasing aggressiveness attempt to
139 aquire precreated objects on the minimum number of required OSCs.
143 Description: Use old size assignment to avoid deadlock
144 Details : This reverts the changes in bugs 2369 and bug 14138 that introduced
145 the scheduling while holding a spinlock. We do not need locking
146 for size in ll_update_inode() because size is only updated from
147 the MDS for directories or files without objects, so there is no
148 other place to do the update, and concurrent access to such inodes
149 are protected by the inode lock.
153 Description: resolve "_IOWR redefined" build error on SLES10
157 Description: dump the memory debugging after all modules are unloaded to
158 suppress false negative in conf_sanity test 39
160 Severity : enhancement
162 Description: build kernel-ib packages for OFED 1.3 in our release cycle
167 Description: fix SLES kernel versioning
168 Details : the kernel version for our SLES 10 kernel did not include a "-"
169 before the "smp" at the end. while this was not a problem in
170 general, it did mean that software trying to use the kernel
171 version to try to detect a vendor specific kernel would fail.
172 this was most evident by the OFED build scripts.
176 Description: Don't update lov_desc members until making sure they are valid
177 Details : When updating lov_desc members via proc fs, need fix their
178 validities before doing the real update.
182 Description: don't put request into delay list while invalidate in flight.
183 Details : ptlrpc_delay_request sometimes put in delay list while invalidate
184 import in flight. this produce timeout for invalidate and sometimes
185 can cause stale data.
189 Frequency : on ppc only
190 Description: not convert ost objects for directory because it's not exist.
191 Details : ll_dir_getstripe assume dirrectory has ost objects but this wrong.
195 Description: Add FMODE_EXEC file flag for SLES10 SP1 kernel.
197 Severity : enhancement
199 Description: Update to support 2.6.22.14 vanilla kernel.
203 Frequency : rare, on recovery
204 Description: read procfs can produce deadlock in some situation
205 Details : Holding lprocfs lock which send rpc can produce block for destroy
206 obd objects and this also block reconnect with -EALREADY. This isn't
207 fix all lprocfs bugs - but make it rare.
209 Severity : enhancement
211 Description: Update kernel to RHEL5 2.6.18-53.1.14.el5.
214 Frequency : frequent on X2 node
216 Description: mdc_set_open_replay_data LBUG
217 Details : Set replay data for requests that are eligible for replay.
221 Description: lustre_mgs: operation 101 on unconnected MGS
222 Details : When MGC is disconnected from MGS long enough, MGS will evict the
223 MGC, and late on MGC cannot successfully connect to MGS and a lot
224 of the error messages complaining that MGS is not connected.
228 Frequency : on network error
229 Description: panic with double free request if network error
230 Details : mdc_finish_enqueue is finish request if any network error ocuring,
231 but it's true only for synchronus enqueue, for async enqueue
232 (via ptlrpcd) this incorrect and ptlrpcd want finish request
235 Severity : enhancement
237 Description: client-side metadata stat-ahead during readdir(directory readahead)
238 Details : perform client-side metadata stat-ahead when the client detects
239 readdir and sequential stat of dir entries therein
242 Frequency : on start mds
244 Description: Implement get_info(last_id) in obdfilter.
247 Frequency : occasional
249 Description: Correctly check stale fid, not start epoch if ost not support SOM
250 Details : open with flag O_CREATE need set old fid in op_fid3 because op_fid2
251 overwrited with new generated fid, but mds can anwer with one of these
252 two fids and both is not stale. setattr incorectly start epoch and
253 assume will be called done_writeting, but without SOM done_writing
257 Frequency : rare, depends on device drivers and load
259 Description: MDS or OSS nodes crash due to stack overflow
260 Details : Code changes in 1.8.0 increased the stack usage of some functions.
261 In some cases, in conjunction with device drivers that use a lot
262 of stack the MDS (or possibly OSS) service threads could overflow
263 the stack. One change which was identified to consume additional
264 stack has been reworked to avoid the extra stack usage.
267 Frequency : occasional
269 Description: Do not fail import if osc_interpret_create gets -EAGAIN
270 Details : If osc_interpret_create got -EAGAIN it immediately exits and
271 wakeup oscc_waitq. After wakeup oscc_wait_for_objects call
272 oscc_has_objects and see OSC has no objests and call
273 oscc_internal_create to resend create request.
275 Severity : enhancement
277 Description: Update to SLES10 SP1 latest kernel-2.6.16.54-0.2.5.
279 Severity : enhancement
281 Description: Update to RHEL5 latest kernel-2.6.18-53.1.13.el5.
284 Frequency : very rare
286 Description: Fix replay if there is an un-replied request and open
287 Details : In some cases, older replay request will revert the
288 mcd->mcd_last_xid on MDS which is used to record the client's
291 Severity : enhancement
293 Description: Update to RHEL5 latest kernel-2.6.18-53.1.6.el5.
295 Severity : enhancement
297 Description: Add rhel5 support to HEAD.
299 Serverity : enhancement
301 Description: Update RHEL4 kernel to 2.6.9-67.0.4.
306 Description: Don't allow skipping OSTs if index has been specified.
307 Details : Don't allow skipping OSTs if index has been specified, make locking
308 in internal create lots better.
312 Description: LBUG in ptlrpc_check_set() bad phase ebc0de00
313 Details : access to bitfield in structure is always rounded to long
314 and this produce problem with not atomic change any bit.
318 Description: Lustre make rpms failed.
319 Details : Remove ldiskfs spec file to avoids rpmbuild be confused when
320 builds Lustre rpms from tarball.
323 Frequency : rare on shutdown ost
325 Description: If llog cancel was not send before clean_exports phase, this can
326 produce deadlock in llog code.
327 Details : If llog thread has last reference to obd and call class_import_put
328 this produce deadlock because llog_cleanup_commit_master wait when
329 last llog_commit_thread exited, but this never success because was
330 called from llog_commit_thread.
334 Description: allow userland application know is lost one of stripes.
335 Details : fill lvb_blocks with error code on ost and return it to
336 application if error flag found.
340 Description: NULL lov_tgts causing MDS oops
341 Details : more safe checks for NULL lov_tgts for avoid oops.
343 Severity : enhancement
345 Description: Update to RHEL4 latest kernel-2.6.9-67.0.1.EL.
349 Descriptoin: make lov_create() will not stuck in obd_statfs_rqset()
350 Details : If an OST is down the MDS will hang indefinitely in
351 obd_statfs_rqset() waiting for the statfs data. While for
352 MDS QOS usage of statfs, it should not stuck in waiting.
354 Severity : enhancement
356 Description: remote_acl support
357 Details : Support ACL-based permission check for remote user.
358 Support setfacl/getfacl for remote user with the utils
359 "lfs {l,r}{s,g}etfacl" which follow the same parameter format as
360 the system "{s,g}etfacl" utils.
362 Severity : enhancement
364 Description: Update to RHEL4 U6 kernel-2.6.9-67.EL.
366 Severity : enhancement
368 Description: Update to RHEL5 latest kernel-2.6.18-53.1.4.el5.
372 Description: make mgs_setparam() handle fsname containing dash
373 Details : fsname containing a dash does not work with lctl conf_param
375 Severity : enhancement
377 Description: Update to SLES10 SP1 latest kernel-2.6.16.54-0.2.3.
379 Severity : enhancement
381 Description: Update to RHEL5 Update-1 kernel 2.6.18-53.el5.
385 Frequency : rare, at shutdown
386 Description: access already free / zero obd_namespace.
387 Details : if client_disconnect_export was called without force flag set,
388 and exist connect request in flight, this can produce access to
389 NULL pointer (or already free pointer) when connect_interpret
390 store ocd flags in obd_namespace.
394 Frequency : only at startup
395 Description: not alloc memory with spinlock held.
396 Details : allocation memory with GFP_KERNEL can produce sleep deadlock,
397 if any spinlock held.
399 Severity : enhancement
401 Description: make lustre randomly fail allocating memory
402 Details : Make lustre randomly failed allocating memory for testing purpose.
404 Severity : enhancement
406 Description: lost problems with lov objid file
407 Details : Fixes some scability and access to not inited memory problems
408 in work with lov objdid file.
413 Description: lfs find does not continue on file error
414 Details : Continue other files processing when a file/dir is absent.
418 Description: Inconsistent usage of lustre_pack_reply()
419 Details : Standardize the usage of lustre_pack_reply() such that it
420 always generate a CERROR on failure.
423 Frequency : occasional
425 Description: MDS hang or stay in waiting lock
426 Details : If client receive lock with CBPENDING flag ldlm need send lock
427 cancel as separate rpc, to avoid situation when cancel request
428 can't processed due all i/o threads stay in wait lock.
432 Description: Update to RHEL5 kernel 2.6.18-8.1.15.el5.
436 Description: Update to SLES10 SP1 kernel 2.6.16.53-0.16
440 Description: Update to SLES9 kernel-2.6.5-7.287.3.
444 Description: Update to RHEL4 latest kernel.
446 Severity : enhancement
448 Description: Build SLES10 patchless client fails
449 Details : The configure was broken by run ./configure with
450 --with-linux-obj=.... argument for patchless client. When the
451 configure use --with-linux-obj, the LINUXINCLUDE= -Iinclude
452 can't search header adequately. Use absolute path such as
453 -I($LINUX)/include instead.
457 Description: interrupt oig_wait produce painc on resend.
458 Details : brw_redo_request can be used for resend requests from ptlrpcd and
459 private set, and this produce situation when rq_ptlrpcd_data not
460 copyed to new allocated request and triggered LBUG on assert
461 req->rq_ptlrpcd_data != NULL. But this member used only for wakeup
462 ptlrpcd set if request is changed and can be safety changed to use
467 Description: LASSERT_{REQ,REP}SWAB macros are buggy
468 Details : If SWAB_PARANOIA is disabled, the LASSERT_REQSWAB and
469 LASSERT_REPSWAB macros become no-ops, which is incorrect. Drop
470 these macros and replace them with their difinitions instead.
474 Description: Update kernel patches for SLES10 2.6.16.53-0.8.
475 Details : Update which_patch & target file for SLES10 latest kernel.
478 Description: Remove client patches from SLES 10 kernel.
479 Details : This causes SLES 10 clients to behave as patchless clients
480 even on a Lustre-patched (server) kernel.
482 Severity : enhancement
484 Description: self-adjustable client's lru lists
485 Details : use adaptive algorithm for managing client cached locks lru
486 lists according to current server load, other client's work
487 pattern, memory activities, etc. Both, server and client
488 side namespaces provide number of proc tunables for controlling
491 Severity : enhancement
493 Description: light-weight GSS support
494 Details : Support krb5n and krb5a mode, which keep Kerberos 5 authentication
495 and reduce performance overhead.
497 Severity : enhancement
499 Description: Linux keyring support
500 Details : Support using service of Linux keyring for Lustre GSS internal
501 context refresh/cache mechanism.
505 Description: Fix errors in lfs documentation
506 Details : Fixes man pages
510 Description: don't use GFP_* in generic Lustre code.
511 Details : Use cfs_alloc_* functions and CFS_* flags for code portability.
515 Description: obdclass is limited by single OBD_ALLOC(idarray)
516 Details : replace OBD_ALLOC/OBD_FREE with OBD_VMALLOC/OBD_VFREE
520 Description: warnings with build patchless client with vanila 2.6.19 and up
521 Details : change old ctl_table style and replace ctl_table/ctl_table_header
522 with cfs_sysctl_table_t/cfs_sysctl_table_header_t
526 Frequency : Only for SLES
527 Description: sanity_quota fail test_1
528 Details : There are multiple occurences of $TSTUSR in SLES's /etc/group
529 file, which makes TSTID[2] inunique.
533 Frequency : Only for SLES9
534 Description: Kernel patches for SLES9 2.6.5-7.286 kernel
535 Details : Update target/ChangeLog/which_patch .
539 Frequency : Only for test_10 in sanity-quota.sh
540 Description: a bug in quota test code
541 Details : checking a test flag in a wrong place
545 Frequency : Only for test_13 in sanity-quota.sh
546 Description: a bug in quota test script
547 Details : shouldn't check overfull allocated quota
551 Description: jbd statistics
552 Details : Port older jbd statistics patch for sles10
554 Severity : enhancement
556 Description: Add printing inode info into message about error in writepage.
561 Description: reply_lock_interpret crash due to race with it and lock cancel.
562 Details : Do not replay locks that are being cancelled. Do not reference
563 locks by their address during replay, just by their handle.
567 Frequency : When flocks are used.
568 Description: assertion failure in ldlm_cli_enquque_fini for non NULL lock.
569 Details : Flock locks might destroy just granted lock if it could be merged
570 with another existing flock, this is done in completion handler,
571 so teach ldlm_cli_enquque_fini that this is a valid case for
577 Description: Oops in read and write path when failing to allocate lock.
578 Details : Check if lock allocation failed and return error back.
582 Description: lstripe command fails for valid OST index
583 Details : The stripe offset is compared to lov->desc.ld_tgt_count
584 instead of lov->desc.ld_active_tgt_count.
588 Description: sanity.sh failed test 103
589 Details : RHEL mis-interpret setfacl "-X" param, so we won't test setfacl
594 Description: df doesn't work properly if diskfs blocksize != 4K
595 Details : Choose biggest blocksize of OST's as the LOV's blocksize.
599 Description: lfs find on -1 stripe looping in lsm_lmm_verify_common()
600 Details : Avoid lov_verify_lmm_common() on directory with -1 stripe count.
604 Description: obd_health_check_timeout too short
605 Details : set obd_health_check_timeout as 1.5x of obd_timeout
609 Description: llapi_file_create() does not allow some changes
610 Details : add llapi_file_open() that allows specifying the mode and
611 open flags, and also returns an open file handle.
615 Description: merge and cleanup kernel patches.
616 Details : Remove mnt_lustre_list in vfs_intent-2.6-rhel4.patch.
620 Description: Add journal checksum support.(Kernel part)
621 Details : The journal checksum feature adds two new flags i.e
622 JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT and
623 JBD2_FEATURE_COMPAT_CHECKSUM. JBD2_FEATURE_CHECKSUM flag
624 indicates that the commit block contains the checksum for
625 the blocks described by the descriptor blocks. Now commit
626 record can be sent to disk without waiting for descriptor
627 blocks to be written to disk. This behavior is controlled
628 using JBD2_FEATURE_ASYNC_COMMIT flag.
632 Description: OSS needs mutliple precreate threads
633 Details : Add ability to start more than one create thread per OSS.
637 Description: Sanity.sh test_65k failed: setstripe should have succeeded
638 Details : execute lfs setstripe on client
642 Description: mds_obd_create error creating tmp object
643 Details : When the user sets quota on root, llog will be affected and can't
644 create files and write files.
647 Frequency : Always on ia64 patchless client, and possibly others.
649 Description: Add EXPORT_SYMBOL check for node_to_cpumask symbol.
650 Details : This allows the patchless client to be loaded on architectures
655 Description: RedHat Update kernel for RHEL5
656 Details : Add the kernel config file for RHEL5.
660 Description: RedHat Update kernel for RHEL5
661 Details : Modify the kernel config file more closer RHEL5.
665 Description: Build failure against Centos5 (RHEL5)
666 Details : Define PAGE_SIZE when it isn't present.
670 Description: test_7 on sanity-quota.sh can't be used on separate machines
671 Details : add facet to handle it
675 Description: "ll_intent_file_open()) lock enqueue: err: -13" with nfs
676 Details : with NFS, the anon dentry's parent was set to itself in
677 d_alloc_anon(), so in MDS, we use rec->ur_fid1 to find the
678 corresponding dentry other than use rec->ur_name.
680 Severity : enhancement
682 Description: lfs setstripe enhancement
683 Details : Make lfs setstripe understand 'k', 'm' and 'g' for stripe size.
687 Description: enable data checksumming by default
688 Details : enable checksum by default, allow --disable-checksum
689 configure option and "-o nochecksum" mount option. Checksums
690 can also be disabled at runtime via $LPROC/osc/*/checksum_pages.
694 Description: lustre support for RHEL5
695 Details : Add support for RHEL5.
699 Description: Client eviction due to failover config
700 Details : after a connection loss, the lustre client should attempt to
701 reconnect to the last active server first before trying the
702 other potential connections.
706 Description: when mds and osts use different quota unit(32bit and 64bit),
707 quota will be released repeatly.
708 Details : void sending multiple quota reqs to mds, which will keep the
709 status between the reqs.
713 Description: osts not allocated evenly to files
714 Details : change the condition to increase offset_idx
717 Frequency : Always for filesystems larger than 2TB on 32-bit systems.
719 Description: Data corruption for OSTs that are formatted larger than 2TB
721 Details : When generating the bio request for lustre file writes the
722 sector number would overflow a temporary variable before being
723 used for the IO. The data reads correctly from Lustre (which
724 will overflow in a similar manner) but other file data or
725 filesystem metadata may be corrupted in some cases.
729 Description: Tune the kernel for good SCSI performance.
730 Details : Set the value of /sys/block/{dev}/queue/max_sectors_kb
731 to the value of /sys/block/{dev}/queue/max_hw_sectors_kb
736 Description: rewrite ext2-derived code in obdclass/uuid.c
737 Details : rewrite inherited code (uuid parsing code from ext2 utils)
738 from scratch preserving functionality.
742 Description: "lfs find -obd UUID" prints directories
743 Details : "lfs find -obd UUID" will return all directory names instead
744 of just file names. It is incorrect because the directories
745 do not reside on the OSTs.
749 Description: use i_size_read and i_size_write in 2.6 port
750 Details : replace inode->i_size access with i_size_read/write()
753 Frequency : when removing large files
755 Description: scheduling issue during removal of large Lustre files
756 Details : Don't take the BKL in fsfilt_ext3_setattr() for 2.6 kernels.
757 It causes scheduling issues when removing large files (17TB in the
761 Frequency : only with liblustre clients on XT3
763 Description: evictions taking too long
764 Details : allow llrd to evict clients directly on OSTs
767 Frequency : only on ppc
769 Description: /proc/fs/lustre/devices broken on ppc
770 Details : The patch as applied to 1.6.2 doesn't look correct for all arches.
771 We should make sure the type of 'index' is loff_t and then cast
772 explicitly as needed below. Do not assign an explicitly cast
776 Frequency : only for rhel5
778 Description: Kernel patches update for RHEL5 2.6.18-8.1.10.el5.
779 Details : Modify the target file & which_kernel.
781 Severity : enhancement
783 Description: omit set fsid for export NFS
784 Details : fix set/restore device id for avoid EMFILE error and mark lustre fs
785 as FS_REQUIRES_DEV for avoid problems with generate fsid.
789 Frequency : Always, for kernels after 2.6.16
790 Description: Fix warning idr_remove called for id=.. which is not allocated.
791 Details : Last kernels save old s_dev before kill super and not allow
792 to restore from callback - restore it before call kill_anon_super.
796 Description: buffer overruns could theoretically occur
797 Details : llapi_semantic_traverse() modifies the "path" argument by
798 appending values to the end of the origin string, and a
799 overrun may occur. Adding buffer overrun check in liblustreapi.
803 Description: Fix error on 'ls .' at the top of the Lustre mount.
804 Details : Don't revalidate dentry if it is a root dentry.
808 Description: Kernel patches update for RHEL4 2.6.9-55.0.6.
809 Details : Modify vm-tunables-rhel4.patch.
813 Description: Kernel config for 2.6.18-vanilla.
814 Details : Modify targets/2.6-vanilla.target.in.
815 Add config file kernel-2.6.18-2.6-vanilla-i686.config.
816 Add config file kernel-2.6.18-2.6-vanilla-i686-smp.config.
817 Add config file kernel-2.6.18-2.6-vanilla-x86_64.config.
818 Add config file kernel-2.6.18-2.6-vanilla-x86_64-smp.config.
822 Description: improve handling recoverable errors
823 Details : if request processig with error which can be recoverable on server
824 request should be resend, otherwise page released from cache and
829 Description: Kernel patches update for RHEL5 2.6.18-8.1.14.el5.
830 Details : Modify target file & which_patch.
831 A flaw was found in the IA32 system call emulation provided
832 on AMD64 and Intel 64 platforms. An improperly validated 64-bit
833 value could be stored in the %RAX register, which could trigger an
834 out-of-bounds system call table access. An untrusted local user
835 could exploit this flaw to run code in the kernel
836 (ie a root privilege escalation). (CVE-2007-4573).
840 Description: O_DIRECT bypasses client statistics.
841 Details : When running with O_DIRECT I/O, neither the client rpc_stats nor
842 read_ahead_stats were updated. copied the stats section from
843 osc_send_oap_rpc() into async_internal().
847 Description: Add jbd statistics patch for RHEL5 and 2.6.18-vanilla
851 Description: change order of libsysio includes
852 Details : '#include sysio.h' should always come before '#include xtio.h'
856 Description: handle "serious error: objid * already exists" more gracefully
857 Details : If LAST_ID value on disk is smaller than the objects existing in
858 the O/0/d* directories, it indicates disk corruption and causes an
859 LBUG(). If the object is 0-length, then we should use the existing
860 object. This will help to avoid a full fsck in most cases.
862 Severity : enhancement
864 Description: adapt the lustre_config script to support the upgrade case
865 Details : Add "-u" option for lustre_config script to support upgrading 1.4
866 server targets to 1.6 in parallel.
870 Description: To avoid grant space > avaible space when the disk is almost
871 full. Without this patch you might see the error "grant XXXX >
872 available" or some LBUG about grant, when the disk is almost
874 Details : In filter_check_grant, for non_grant cache write, we should
875 check the left space by if (*left > ungranted + bytes), instead
876 of (*left > ungranted), because only we are sure the left space
877 is enough for another "bytes", then the ungrant space should be
878 increase. In client, we should update cl_avail_grant only there
879 is OBD_MD_FLGRANT in the reply.
883 Description: Update RHEL 4 kernel to fix local root privilege escalation.
884 Details : Update to the latest RHEL 4 kernel to fix the vulnerability
885 described in CVE-2007-4573. This problem could allow untrusted
886 local users to gain root access.
889 Frequency : when using O_DIRECT and quotas
891 Description: Incorrect file ownership on O_DIRECT output files
892 Details : block usage reported by 'lfs quota' does not take into account
893 files that have been written with O_DIRECT.
898 Description: touch file failed when fs is not full
899 Details : OST in recovery should not be discarded by MDS in alloc_qos(),
900 otherwise we can get ENOSP while fs is not full.
904 Description: parallel lock callbacks
905 Details : Instead of sending blocking and completion callbacks as separated
906 requests, adding them to a set and sending in parallel.
909 Frequency : only for Cray XT3
910 Bugzilla : 12829/13455
911 Description: Changing primary group doesn't change the group lustre assigns to
913 Details : When CRAY_XT3 is defined, the fsgid supplied by the client is
914 overridden with the primary group provided by the group upcall,
915 whereas the supplied fsgid can be trusted if it is in the list of
916 supplementary groups returned by the group upcall.
918 Severity : enhancement
920 Description: Allow masking D_WARNING, D_ERROR messages from console
921 Details : Console messages can now be disabled via lnet.printk.
925 Description: User code with malformed file open parameter crashes client node
926 Details : Before packing join_file req, all the related reference should be
927 checked carefully in case some malformed flags cause fake
928 join_file req on client.
932 Description: LDLM_ENQUEUE races with LDLM_CP_CALLBACK
933 Details : ldlm_completion_ast() assumes that a lock is granted when the req
934 mode is equal to the granted mode. However, it should also check
935 that LDLM_FL_CP_REQD is not set.
939 Description: Heavy nfs access might result in deadlocks
940 Details : After ELC code landed, it is now improper to enqueue any mds
941 locks under och_sem, because enqueue might want to decide to
942 cancel open locks for same inode we are holding och_sem for.
946 Description: Client eviction while running blogbench
947 Details : A lot of unlink operations with concurrent I/O can lead to a
948 deadlock causing evictions. To address the problem, the number of
949 oustanding OST_DESTROY requests is now throttled to
950 max_rpcs_in_flight per OSC and LDLM_FL_DISCARD_DATA blocking
951 callbacks are processed in priority.
955 Description: enable ACLs on MDS by default
956 Details : ACLs must be enabled on MDS by default.
959 Frequency : PPC/PPC64 only
961 Description: conflicts between asm-ppc64/types.h and lustre_types.h
962 Details : fix duplicated definitions between asm-ppc64/types.h and
963 lustre_types.h on PPC.
966 Frequency : PPC/PPC64 only
968 Description: asm-ppc/segment.h does not exist
969 Details : fix compile issue on PPC.
973 Description: better handle error messages in extents code
976 Frequency : RHEL4 only
978 Description: mkfs is very slow on IA64/RHEL4
979 Details : A performance regression has been discovered in the MPT Fusion
980 driver between versions 3.02.73rh and 3.02.99.00rh. As a
981 consequence, we have downgraded the MPT Fusion driver in the RHEL4
982 kernel from 3.02.99.00 to 3.02.73 until this problem is fixed.
984 Severity : enhancement
986 Description: SNMP support enhancement
987 Details : Adding total number of sampled request for an MDS node in snmp
990 Severity : enhancement
992 Description: Optimize ldlm waiting list processing for PR extent locks
993 Details : When processing waiting list for read extent lock and meeting read
994 lock that is same or wider to it that is not contended, skip
995 processing rest of the list and immediatelly return current
996 status of conflictness, since we are guaranteed there are no
997 conflicting locks in the rest of the list.
1001 Description: Time out and refuse to reconnect
1002 Details : When the failover node is the primary node, it is possible
1003 to have two identical connections in imp_conn_list. We must
1004 compare not conn's pointers but NIDs, otherwise we can defeat
1005 connection throttling.
1009 Description: port llog fixes from b1_6 into HEAD
1010 Details : Port llog reference couting and some llog cleanups from b1_6
1011 (bug 10800) into HEAD, for protect from panic and access to already
1012 free llog structures.
1016 Description: Detect stride IO mode in read-ahead
1017 Details : When a client does stride read, read-ahead should detect that and
1018 read-ahead pages according to the detected stride pattern.
1022 Description: data checksumming impacts single node performance
1023 Details : add support for several checksum algorithm. Currently, only CRC32
1024 and Adler-32 are supported. The checksum type can be changed on
1025 the fly via /proc/fs/lustre/osc/*/checksum_type.
1029 Description: use adler32 for page checksums
1030 Details : when available, use the Adler-32 algorithm instead of CRC32 for
1035 Description: build for x2 fails
1036 Details : fix compile issue on Cray systems.
1040 Description: Properly match for duplicate locks
1041 Details : Due to different lock order from skiplists code, we need to
1042 traverse entire list for now
1045 Frequency : only on PPC/SLES10
1047 Description: "BITS_PER_LONG is not 32 or 64" in linux/idr.h
1048 Details : On SLES10/PPC, fs.h includes idr.h which requires BITS_PER_LONG to
1049 be defined. Add a hack in mkfs_lustre.c to work around this compile
1054 Description: LASSERT on MDS when client holding flock lock dies
1055 Details : ldlm pool logic depends on number of granted locks equal to
1056 number of released locks which is not true for flock locks, so
1057 just exclude such locks from consideration.
1061 Description: MDS deadlock with many ll_sync_lov threads and I/O stalled
1062 Details : Use fsfilt_sync() for both the whole filesystem sync and
1063 individual file sync to eliminate dangerous inode locking
1064 with I_LOCK that can lead to a deadlock.
1068 Description: performance in 1.6.3
1069 Details : Force q->max_phys_segments to MAX_PHYS_SEGMENTS on SLES10 to be
1070 sure that 1MB requests are not fragmented by the block layer.
1072 Severity : enhancement
1074 Description: organize the server-side client stats on per-nid basis
1075 Details : Change the structure of stats under obdfilter and mds to
1083 The "uuid"s file would list the uuids of _active_ exports.
1084 And the clear entry is to clear all stats and stale nids.
1086 Severity : enhancement
1088 Description: eliminate client locks in face of contention
1089 Details : file contention detection and lockless i/o implementation
1090 for contended files.
1094 Description: Reinitialize optind to 0 so that interactive lfs works in all cases
1097 Frequency : very rare, if additional xattrs are used on kernels >= 2.6.12
1099 Description: MDS may lose file striping (and hence file data) in some cases
1100 Details : If there are additional extended attributes stored on the MDS,
1101 in particular ACLs, SELinux, or user attributes (if user_xattr
1102 is specified for the client mount options) then there is a risk
1103 of attribute loss. Additionally, the Lustre file striping
1104 needs to be larger than default (e.g. striped over all OSTs),
1105 and an additional attribute must be stored initially in the
1106 inode and then increase in size enough to be moved to the
1107 external attribute block (e.g. ACL growing in size) for file
1112 Description: skiplist implementation simplification
1113 Details : skiplists are used to group compatible locks on granted list
1114 that was implemented as tracking first and last lock of each lock group
1115 the patch changes that to using doubly linked lists
1119 Description: MDS LBUG: ASSERTION(!IS_ERR(dchild))
1120 Details : Change LASSERTs to client eviction (i.e. abort client's recovery)
1121 because LASSERT on both the data supplied by a client, and the data
1122 on disk is dangerous and incorrect.
1124 Severity : enhancement
1126 Description: Slow truncate/writes to huge files at high offsets.
1127 Details : Directly associate cached pages to lock that protect those pages,
1128 this allows us to quickly find what pages to write and remove
1129 once lock callback is received.
1133 Description: more ldlm soft lockups
1134 Details : In ldlm_resource_add_lock(), call to ldlm_resource_dump()
1135 starve other threads from the resource lock for a long time in
1136 case of long waiting queue, so change the debug level from
1137 D_OTHER to the less frequently used D_INFO.
1139 Severity : enhancement
1141 Description: add -gid, -group, -uid, -user options to lfs find
1145 Description: Hung threads in invalidate_inode_pages2_range
1146 Details : The direct IO path doesn't call check_rpcs to submit a new RPC once
1147 one is completed. As a result, some RPCs are stuck in the queue
1152 Description: filter threads hungs on waiting journal commit
1153 Details : Cleanup filter group llog code, then only filter group llog will
1154 be only created in the MDS/OST syncing process.
1158 Description: Procfs and llog threads access destoryed import sometimes.
1159 Details : Sync the import destoryed process with procfs and llog threads by
1160 the import refcount and semaphore.
1162 --------------------------------------------------------------------------------
1164 2007-08-10 Cluster File Systems, Inc. <info@clusterfs.com>
1166 * Support for kernels:
1167 2.6.5-7.283 (SLES 9),
1168 2.6.9-55.EL (RHEL 4),
1169 2.6.16.46-0.14 (SLES 10),
1170 2.6.18.8 vanilla (kernel.org)
1171 * Client support for unpatched kernels:
1172 (see http://wiki.lustre.org/index.php?title=Patchless_Client)
1173 2.6.16 - 2.6.22 vanilla (kernel.org)
1174 * Due to recently discovered recovery problems, we do not recommend
1175 using patchless RHEL 4 clients with this or any earlier release.
1176 * Recommended e2fsprogs version: 1.39.cfs8
1177 * Note that reiserfs quotas are disabled on SLES 10 in this kernel.
1178 * Starting with this release, the ldiskfs backing filesystem required
1179 by Lustre is now in its own package, lustre-ldiskfs. This package
1180 should be installed. It is versioned separately from Lustre and
1181 may be released separately in future.
1185 Description: block reactivating mgc import until all deactivates complete
1186 Details : Fix race when failing back MDT/MGS to itself (testing)
1189 Frequency : at statup only
1191 Description: mds_lov_synchronize race leads to various problems
1192 Details : simultaneous MDT->OST connections at startup can cause the
1193 sync to abort, leaving the OSC in a bad state.
1195 Severity : enhancement
1197 Description: add optional extra BUILD_VERSION info
1198 Details : add a new environment variable (namely LUSTRE_VERS) which allows
1199 to override the lustre version.
1202 Frequency : 2.6.18 servers only
1204 Description: ll_kern_mount() doesn't release the module reference
1205 Details : The ldiskfs module reference count never drops down to 0
1206 because ll_kern_mount() doesn't release the module reference.
1211 Description: server LBUG when using old ost_num_threads parameter
1212 Details : Accept the old ost_num_threads parameter but warn that it
1213 is deprecated, and fix an off-by-one error that caused an LBUG.
1218 Description: Transient SCSI error results in persistent IO issue
1219 Details : iobuf->dr_error is not reinitialized to 0 between two
1223 Frequency : sometimes when underlying device returns I/O errors
1225 Description: OSTs not going read-only during write failures
1226 Details : OSTs are not remounted read-only when the journal commit threads
1227 get I/O errors because fsfilt_ext3 calls journal_start/stop()
1228 instead of the ext3 wrappers.
1232 Description: poor connect scaling with increasing client count
1233 Details : Don't run filter_grant_sanity_check for more than 100 exports
1234 to improve scaling for large numbers of clients.
1237 Frequency : SLES10 only
1239 Description: sanity-quota.sh quotacheck failed: rc = -22
1240 Details : Quotas cannot be enabled on SLES10.
1243 Frequency : liblustre clients only
1245 Description: getdirentries does not give error when run on compute nodes
1246 Details : getdirentries does not fail when the size specified as an argument
1247 is too small to contain at least one entry
1249 Severity : enhancement
1251 Description: Add LNET router traceability for debug purposes
1252 Details : If a checksum failure occurs with a router as part of the
1253 IO path, the NID of the last router that forwarded the bulk data
1254 is printed so it can be identified.
1259 Description: OST "spontaneously" evicts client; client has imp_pingable == 0
1260 Details : Due to a race condition, liblustre clients were occasionally
1261 evicted incorrectly.
1263 Severity : enhancement
1265 Description: lfs setstripe use optional parameters instead of postional
1268 Severity : enhancement
1270 Description: Nanosecond timestamp support for ldiskfs
1271 Details : The on-disk ldiskfs filesystem has added support for nanosecond
1272 resolution timestamps. There is not yet support for this at
1273 the Lustre filesystem level.
1276 Frequency : during server recovery
1278 Description: MDS failing to send precreate requests due to OSCC_FLAG_RECOVERING
1279 Details : request with rq_no_resend flag not awake l_wait_event if they get a
1283 Frequency : nfs export on patchless client
1285 Description: connectathon hang when test nfs export over patchless client
1286 Details : Disconnected dentry cannot be found with lookup, so we do not need
1287 to unhash it or make it invalid
1290 Description: fix llapi_lov_get_uuids() to allow many OSTs to be returned
1291 Details: : Change llapi_lov_get_uuids() to read the UUIDs from /proc instead
1292 of using an ioctl. This allows lfsck for > 160 OSTs to succeed.
1297 Description: open req refcounting wrong on reconnect
1298 Details : If reconnect happened between getting open reply from server and
1299 call to mdc_set_replay_data in ll_file_open, we will schedule
1300 replay for unreferenced request that we are about to free.
1301 Subsequent close will crash in variety of ways.
1302 Check that request is still eligible for replay in
1303 mdc_set_replay_data().
1308 Description: disable writes to filesystem when reading health_check file
1309 Details : the default for reading the health_check proc file has changed
1310 to NOT do a journal transaction and write to disk, because this
1311 can cause reads of the /proc file to hang and block HA state
1312 checking on a healthy but otherwise heavily loaded system. It
1313 is possible to return to the previous behaviour during configure
1314 with --enable-health-write.
1316 Severity : enhancement
1318 Description: 64-bit inode version
1319 Details: : Add a on-disk 64-bit inode version for ext3 to track changes made
1320 to the inode. This will be required for version-based recovery.
1325 Description: MDS fails to start if a duplicate client export is detected
1326 Details : in some rare cases it was possible for a client to connect to
1327 an MDS multiple times. Upon recovery the MDS would detect this
1328 and fail during startup. Handle this more gracefully.
1330 Severity : enhancement
1332 Description: Add -o localflock option to simulate old noflock
1334 Details : This will achieve local-only flock/fcntl locks
1340 Description: log_commit_thread vs filter_destroy race leads to crash
1341 Details : Take import reference before releasing llog record semaphore
1346 Description: Wrong request locking in request set processing
1347 Details : ptlrpc_check_set wrongly uses req->rq_lock for proctect add to
1348 imp_delayed_list, in this place should be used imp_lock.
1351 Frequency : when reconnection
1353 Description: Grant Leak when osc reconnect to OST
1354 Details : When osc reconnect ost, OST(filter) should check whether it
1355 should grant more space to client by comparing fed_grant and
1356 cl_avail_grant, and return the granted space to client instead
1357 of "new granted" space, because client will call osc_init_grant
1358 to update the client grant space info.
1361 Frequency : when client reconnect to OST
1363 Description: Grant Leak when osc do resend and replay bulk write
1364 Details : When osc reconnect to OST, OST(filter)should clear grant info of
1365 bulk write request, because the grant info while be sync between
1366 OSC and OST when reconnect, and we should ignore the grant info
1367 these of resend/replay write req.
1372 Description: Grant space more than avaiable left space sometimes.
1373 Details : When then OST is about to be full, if two bulk writing from
1374 different clients came to OST. Accord the avaliable space of the
1375 OST, the first req should be permitted, and the second one
1376 should be denied by ENOSPC. But if the seconde arrived before
1377 the first one is commited. The OST might wrongly permit second
1378 writing, which will cause grant space > avaiable space.
1381 Frequency : when client is evicted
1383 Description: Grant might be wrongly erased when osc is evicted by OST
1384 Details : when the import is evicted by server, it will fork another
1385 thread ptlrpc_invalidate_import_thread to invalidate the
1386 import, where the grant will be set to 0. While the original
1387 thread will update the grant it got when connecting. So if
1388 the former happened latter, the grant will be wrongly errased
1389 because of this race.
1394 Description: Checking Stale with correct fid
1395 Details : ll_revalidate_it should uses de_inode instead of op_data.fid2
1396 to check whether it is stale, because sometimes, we want the
1397 enqueue happened anyway, and op_data.fid2 will not be initialized.
1399 Severity : enhancement
1401 Description: update patchless client
1402 Details : Add support for patchless client with 2.6.20, 2.6.21 and RHEL 5
1405 Frequency : only with 2.4 kernel
1407 Description: random memory corruption
1408 Details : size of struct ll_inode_info is to big for union inode.u and this
1409 can be cause of random memory corruption.
1414 Description: Memory leak in recovery
1415 Details : Lov_mds_md was not free in an error handler in mds_create_object.
1416 It should also check obd_fail before fsfilt_start, otherwise if
1417 fsfilt_start return -EROFS,(failover mds during mds recovery).
1418 then the req will return with repmsg->transno = 0 and rc = EROFS.
1419 and we met hit the assert LASSERT(req->rq_reqmsg->transno ==
1420 req->rq_repmsg->transno) in ptlrpc_replay_interpret. Fcc should
1421 be freed no matter whether fsfilt_commit success or not.
1424 Frequency : only with huge count clients
1426 Description: Prevents from taking the superblock lock in llap_from_page for
1428 Details : using LL_ORIGIN_REMOVEPAGE origin flag instead of LL_ORIGIN_UNKNOW
1429 for llap_from_page call in ll_removepage prevents from taking the
1430 superblock lock for a soon died page.
1435 Description: Not check open intent error before release open handle
1436 Details : in some rare cases, the open intent error is not checked before
1437 release open handle, which may cause
1438 ASSERTION(open_req->rq_transno != 0), because it tries to release
1439 the failed open handle.
1444 Description: Set cat log bitmap only after create log success.
1445 Details : in some rare cases, the cat log bitmap is set too early. and it
1446 should be set only after create log success.
1450 Description: Accessing a block bevice can re-enable I/O when Lustre is
1451 tearing down a device.
1452 Details : dev_clear_rdonly(bdev) must be called in kill_bdev() instead of
1457 Description: service threads may hog cpus when there are a lot of requests
1458 Details : Insert cond_resched to give other threads a chance to use some CPU
1463 Description: the cat log was not initialized in recovery
1464 Details : When mds(mgs) do recovery, the tgt_count might be zero, so the
1465 unlink log on mds will not be initialized until mds post
1466 recovery. And also in mds post recovery, the unlink log will
1467 initialization will be done asynchronausly, so there will be race
1468 between add unlink log and unlink log initialization.
1472 Description: brw_stats were being printed incorrectly
1473 Details : brw_stats were being printed as log2 but all of them were not
1474 recorded as log2. Also remove some code duplication arising from
1475 filter_tally_{read,write}.
1479 Frequency : rare, only in recovery.
1480 Description: ASSERTION(req->rq_type != LI_POISON) failed
1481 Details : imp_lock should be held while iterating over imp_sending_list for
1482 prevent destroy request after get timeout in ptlrpc_queue_wait.
1486 Description: replay-single.sh test 52 fails
1487 Details : A lock's skiplist need to be cleanup when it being unlinked
1488 from its resource list.
1492 Description: Short directio read returns full requested size rather than
1494 Details : Direct I/O operations should return actual amount of bytes
1495 transferred rather than requested size.
1497 Severity : enhancement
1499 Description: metadata RPC reduction (e.g. for rm performance)
1500 Details : decrease the amount of synchronous RPC between clients and servers
1501 by canceling conflicing lock before the operation on the client
1502 and packing thier handles into the main operation RPC to server.
1504 Severity : enhancement
1506 Description: Async OSC create to avoid the blocking unnecessarily.
1507 Details : If a OST has no remain object, system will block on the creating
1508 when need to create a new object on this OST. Now, ways use
1509 pre-created objects when available, instead of blocking on an
1510 empty osc while others are not empty. If we must block, we block
1511 for the shortest possible period of time.
1513 Severity : enhancement
1515 Description: refine locking for avoid write wrong info into lov_objid file
1516 Details : fix possible races with add new target and write/update data in
1519 --------------------------------------------------------------------------------
1521 2007-05-03 Cluster File Systems, Inc. <info@clusterfs.com>
1526 Frequency : on some architectures
1528 Description: 1.6 client sometimes fails to mount from a 1.4 MDT
1529 Details : Uninitialized flags sometimes cause configuration commands to
1533 Frequency : patchless clients only
1535 Description: missing __iget() symbol export
1536 Details : The __iget() symbol export is missing. To avoid the need for
1537 this on patchless clients the deathrow inode reaper is turned
1538 off, and we depend on the VM to clean up old inodes. This
1539 dependency was during via the fix for bug 12181.
1541 --------------------------------------------------------------------------------
1543 2007-04-19 Cluster File Systems, Inc. <info@clusterfs.com>
1545 * CONFIGURATION CHANGE. This version of Lustre WILL NOT
1546 INTEROPERATE with older versions automatically. In many cases a
1547 special upgrade step is needed. Please read the
1548 user documentation before upgrading any part of a live system.
1549 * WIRE PROTOCOL CHANGE from previous 1.6 beta versions. This
1550 version will not interoperate with 1.6 betas before beta5 (1.5.95).
1551 * WARNING: Lustre configuration and startup changes are required with
1552 this release. See https://mail.clusterfs.com/wikis/lustre/MountConf
1558 Severity : enhancement
1560 Description: MountConf
1561 Details : Lustre configuration is now managed via mkfs and mount
1562 commands instead of lmc and lconf. New obd types (MGS, MGC)
1563 are added for dynamic configuration management. See
1564 https://mail.clusterfs.com/wikis/lustre/MountConf for
1567 Severity : enhancement
1569 Description: dynamic OST addition
1570 Details : OSTs can now be added to a live filesystem
1572 Severity : enhancement
1574 Description: startup order invariance
1575 Details : MDTs and OSTs can be started in any order. Clients only
1576 require the MDT to complete startup.
1578 Severity : enhancement
1580 Description: parallel, asynchronous orphan cleanup
1581 Details : orphan cleanup is now performed in separate threads for each
1582 OST, allowing parallel non-blocking operation.
1584 Severity : enhancement
1586 Description: optimized stripe assignment
1587 Details : stripe assignments are now made based on ost space available,
1588 ost previous usage, and OSS previous usage, in order to try
1589 to optimize storage space and networking resources.
1591 Severity : enhancement
1593 Description: Permanently set tunables
1594 Details : All writable /proc/fs/lustre tunables can now be permanently
1595 set on a per-server basis, at mkfs time or on a live system.
1597 Severity : enhancement
1599 Description: Lustre message v2
1600 Details : Add lustre message format v2.
1602 Severity : enhancement
1604 Description: client OST exclusion list
1605 Details : Clients can be started with a list of OSTs that should be
1606 declared "inactive" for known non-responsive OSTs.
1610 Description: SPEC SFS validation failure on NFS v2 over lustre.
1611 Details : Changes the blocksize for regular files to be 2x RPC size,
1612 and not depend on stripe size.
1614 Severity : enhancement
1616 Description: Multiple MD RPCs in flight.
1617 Details : Further unserialise some read-only MDS RPCs - learn about intents.
1618 To avoid overly-overloading MDS, introduce a limit on number of
1619 MDS RPCs in flight for a single client and add /proc controls
1620 to adjust this limit.
1622 Severity : enhancement
1624 Description: client read/write statistics
1625 Details : Add client read/write call usage stats for performance
1626 analysis of user processes.
1627 /proc/fs/lustre/llite/*/offset_stats shows non-sequential
1628 file access. extents_stats shows chunk size distribution.
1629 extents_stats_per_process show chunk size distribution per
1632 Severity : enhancement
1634 Description: mds statistics
1635 Details : Add detailed mds operations statistics in
1636 /proc/fs/lustre/mds/*/stats.
1640 Description: Failure of copying files with lustre special EAs.
1641 Details : Client side always return success for setxattr call for lustre
1642 special xattr (currently only "trusted.lov").
1647 Description: Refcount LNET uuids
1648 Details : The global LNET uuid list grew linearly with every startup;
1649 refcount repeated list entries instead of always adding to
1652 Severity : enhancement
1654 Description: Dynamic service threads
1655 Details : Within a small range, start extra service threads
1656 automatically when the request queue builds up.
1659 Frequency : mixed-endian client/server environments
1661 Description: mixed-endian crashes
1662 Details : The new msg_v2 system had some failures in mixed-endian
1665 Severity : enhancement
1667 Description: Easy OST removal
1668 Details : OSTs can be permanently deactivated with e.g. 'lctl
1669 conf_param lustre-OST0001.osc.active=0'
1671 Severity : enhancement
1673 Description: MGS proc entries
1674 Details : Added basic proc entries for the MGS showing what filesystems
1677 Severity : enhancement
1679 Description: provide MGS failover
1680 Details : Added config lock reacquisition after MGS server failover.
1682 Severity : enhancement
1684 Description: add Linux 2.4 support
1685 Details : Added support for RHEL 2.4.21 kernel for 1.6 servers and clients
1689 Description: a large application tries to do I/O to the same resource and dies
1690 in the middle of it.
1691 Details : Check the req->rq_arrival time after the call to
1692 ost_brw_lock_get(), but before we do anything about
1693 processing it & sending the BULK transfer request. This
1694 should help move old stale pending locks off the queue as
1695 quickly as obd_timeout.
1698 Frequency : when an incorrect nid is specified during startup
1700 Description: ptlrpc connect to non-existant node causes kernel crash
1701 Details : LNET can't be re-entered from an event callback, which
1702 happened when we expire a message after the export has been
1703 cleaned up. Instead, hand the zombie cleanup off to another
1706 Severity : enhancement
1708 Description: plain/inodebits lock performance improvement
1709 Details : Grouping plain/inodebits in granted list by their request modes
1710 and bits policy, thus improving the performance of search through
1714 Frequency : only if OST filesystem is corrupted
1716 Description: client incorrectly hits assertion in ptlrpc_replay_req()
1717 Details : for a short time RPCs with bulk IO are in the replay list,
1718 but replay of bulk IOs is unimplemented. If the OST filesystem
1719 is corrupted due to disk cache incoherency and then replay is
1720 started it is possible to trip an assertion. Avoid putting
1721 committed RPCs into the replay list at all to avoid this issue.
1724 Frequency : liblustre (e.g. catamount) on a large cluster with >= 8 OSTs/OSS
1726 Description: System hang on startup
1727 Details : This bug allowed the liblustre (e.g. catamount) client to
1728 return to the app before handling all startup RPCs. This
1729 could leave the node unresponsive to lustre network traffic
1730 and manifested as a server ptllnd timeout.
1732 Severity : enhancement
1734 Description: Add "/proc/sys/lustre/debug_peer_on_timeout"
1735 Details : liblustre envirable: LIBLUSTRE_DEBUG_PEER_ON_TIMEOUT
1736 boolean to control whether to print peer debug info when a
1737 client's RPC times out.
1740 Frequency : only for kernels with patches from Lustre below 1.4.3
1742 Description: Remove old rdonly API
1743 Details : Remove old rdonly API which unused from at least lustre 1.4.3
1746 Frequency : only for devices with external journals
1748 Description: Set external device read-only also
1749 Details : During a commanded failover stop, we set the disk device
1750 read-only while the server shuts down. We now also set any
1751 external journal device read-only at the same time.
1754 Frequency : when upgrading from 1.4 while trying to change parameters
1756 Description: The wrong (new) MDC name was used when setting parameters for
1757 upgraded MDT's. Also allows changing of OSC (and MDC)
1758 parameters if --writeconf is specified at tunefs upgrade time.
1761 Frequency : when setting specific ost indicies
1763 Description: QOS code breaks on skipped indicies
1764 Details : Add checks for missing OST indicies in the QOS code, so OSTs
1765 created with --index need not be sequential.
1767 Severity : enhancement
1769 Description: Add uninit_groups feature to ldiskfs2 to speed up e2fsck
1770 Details : The uninit_groups feature works in conjunction with the kernel
1771 filesystem code (ldiskfs2 only) and e2fsprogs-1.39-cfs6 to speed
1772 up the pass1 processing of e2fsck. This is a read-only feature
1773 in ldiskfs2 only, so older kernels and current ldiskfs cannot
1774 mount filesystems that have had this feature enabled.
1776 Severity : enhancement
1778 Description: Improve multi-block allocation algorithm to avoid fragmentation
1779 Details : The mballoc3 code (ldiskfs2 only) adds new mechanisms to improve
1780 allocation locality and avoid filesystem fragmentation.
1782 ------------------------------------------------------------------------------
1784 2007-04-01 Cluster File Systems, Inc. <info@clusterfs.com>
1786 * Support for kernels:
1787 2.4.21-47.0.1.EL (RHEL 3)
1788 2.6.5-7.283 (SLES 9)
1789 2.6.9-42.0.10.EL (RHEL 4)
1790 2.6.12.6 vanilla (kernel.org)
1791 2.6.16.27-0.9 (SLES 10)
1792 * Recommended e2fsprogs version: 1.39.cfs5
1794 * Note that reiserfs quotas are disabled on SLES 10 in this kernel
1798 Frequency : occasional, depends on client load and configuration
1799 Bugzilla : 12181, 12203
1800 Description: data loss for recently-modified files
1802 Details : In some cases it is possible that recently written or created
1803 files may not be written to disk in a timely manner (this should
1804 normally be within 30s unless client IO load is very high).
1805 The problem appears as zero-length files or files that are a
1806 multiple of 1MB in size after a client crash or client eviction
1807 that are missing data at the end of the file.
1809 This problem is more likely to be hit on clients where files are
1810 repeatedly created and unlinked in the same directory, clients
1811 have a large amount of RAM, have many CPUs, the filesystem has
1812 many OSTs, the clients are rebooted frequently, and/or the files
1813 are not accessed by other nodes after being written.
1815 The presence of the problem can be detected by looking at
1816 /proc/sys/fs/inode-state. If the first number (nr_inodes) is
1817 smaller than the second (nr_unused) then dirty files will not
1818 be flushed automatically to disk. "sync; sleep 10" should be
1819 run several times on the node before unmounting it to update
1820 Lustre (this is also safe to run on nodes without this problem).
1822 There is also a related kernel bug in the RHEL4 4 2.6.9 kernel
1823 that can cause this same problem, so customers using that kernel
1824 also need to update the kernel in addition to Lustre. In order
1825 to properly fix this bug, the RHEL3 2.4.21 kernel is also updated.
1827 It is normal that files written just before a client crash (less
1828 than 30s) may not yet have been flushed to disk, even for local
1832 Frequency : frequent on thin XT3 nodes
1834 Description: UUID collision on thin XT3 Linux nodes
1835 Details : UUIDs on Compute Node Linux XT3 nodes were not generated
1836 randomly, since we relied on an insufficiently-seeded PRNG.
1841 Description: OSS hangs after "All ost request buffers busy"
1842 Details : A deadlock between quota and journal operations caused OSS
1843 hangs after printing "All ost request buffers busy."
1846 Frequency : always on liblustre builds
1848 Description: Cleanup compiler warnings on liblustre
1851 Frequency : always on liblustre builds on XT3
1853 Description: LC_CONFIG_CDEBUG don't run while build liblustre on XT3.
1857 Description: Addition of EXT3_FEATURE_RO_COMPAT_DIR_NLINKS flag for
1858 > 32000 subdirectories
1859 Details : Add EXT3_FEATURE_RO_COMPAT_DIR_NLINK flag to
1860 EXT3_FEATURE_RO_COMPAT_SUPP. This flag will be set whenever
1861 subdirectory count crosses 32000. This will aid e2fsck to
1862 correctly handle more than 32000 subdirectories.
1865 Frequency : liblustre (e.g. catamount) on a large cluster with >= 8 OSTs/OSS
1867 Description: System hang on startup
1868 Details : This bug allowed the liblustre (e.g. catamount) client to
1869 return to the app before handling all startup RPCs. This
1870 could leave the node unresponsive to lustre network traffic
1871 and manifested as a server ptllnd timeout.
1873 Severity : enhancement
1875 Description: Add "/proc/sys/lustre/debug_peer_on_timeout"
1876 (liblustre envirable: LIBLUSTRE_DEBUG_PEER_ON_TIMEOUT)
1877 boolean to control whether to print peer debug info when a
1878 client's RPC times out.
1883 Description: make O_SYNC working on 2.6 kernels
1884 Details : 2.6 kernels use different method for mark pages for write,
1885 so need add a code to lustre for O_SYNC work.
1890 Description: Failure to close file and release space on NFS
1891 Details : Put inode details into lock acquired in ll_intent_file_open.
1892 Use mdc_intent_lock in ll_intent_open to properly
1893 detect all kind of errors unhandled by mdc_enqueue.
1898 Description: proc file read during shutdown sometimes raced obd removal,
1900 Details : Add lock to prevent obd access after proc file removal.
1903 Frequency : Only for files larger than 4GB on 32-bit clients.
1905 Description: improperly doing page alignment of locks
1906 Details : Modify lustre core code to use CFS_PAGE_* defines instead of
1907 PAGE_*. Make CFS_PAGE_MASK a 64-bit mask.
1912 Description: RPCs being resent when they shouldn't be
1913 Details : Some RPCs that should not be resent are being resent. This
1914 can cause inconsistencies in the RPC state machine. Do not
1915 resend such requests.
1918 Frequency : rare, only with NFS export
1920 Description: Crash on NFS re-export node
1921 Details : under very unusual load conditions an assertion is hit in
1922 ll_intent_file_open()
1925 Frequency : only if OST filesystem is corrupted
1927 Description: client incorrectly hits assertion in ptlrpc_replay_req()
1928 Details : for a short time RPCs with bulk IO are in the replay list,
1929 but replay of bulk IOs is unimplemented. If the OST filesystem
1930 is corrupted due to disk cache incoherency and then replay is
1931 started it is possible to trip an assertion. Avoid putting
1932 committed RPCs into the replay list at all to avoid this issue.
1937 Description: large O_DIRECT requests fail under memory pressure/fragmentation
1938 Details : Large single O_DIRECT read and write calls can fail to allocate
1939 a sufficiently large buffer to process the request. In case of
1940 allocation failure the allocation is retried with a smaller
1941 buffer and broken into smaller requests.
1943 Severity : enhancement
1945 Description: Add -o localflock option to simulate old noflock behaviour.
1946 Details : This will achieve local-only flock/fcntl locks coherentness.
1951 Description: versioning check is incomplete
1952 Details : Checking the version difference of client vs. server, report
1953 error if the gap is too big.
1958 Description: add support PG_writeback bit
1959 Details : add support for PG_writeback bit for Lustre, for more carefull
1960 work with page cache in 2.6 kernel. This also fix some deadlocks
1961 and remove hack for work O_SYNC with 2.6 kernel.
1963 Severity : enhancement
1965 Description: Add uninit_groups feature to ldiskfs2 to speed up e2fsck
1966 Details : The uninit_groups feature works in conjunction with the kernel
1967 filesystem code (ldiskfs2 only) and e2fsprogs-1.39-cfs6 to speed
1968 up the pass1 processing of e2fsck. This is a read-only feature
1969 in ldiskfs2 only, so older kernels and current ldiskfs cannot
1970 mount filesystems that have had this feature enabled.
1972 Severity : enhancement
1974 Description: Improve multi-block allocation algorithm to avoid fragmentation
1975 Details : The mballoc3 code (ldiskfs2 only) adds new mechanisms to improve
1976 allocation locality and avoid filesystem fragmentation.
1978 ------------------------------------------------------------------------------
1980 2007-02-09 Cluster File Systems, Inc. <info@clusterfs.com>
1982 * Support for kernels:
1983 2.6.9-42.0.3.EL (RHEL 4)
1984 2.6.5-7.276 (SLES 9)
1985 2.4.21-47.0.1.EL (RHEL 3)
1986 2.6.12.6 vanilla (kernel.org)
1987 2.6.16.21-0.8 (SLES10)
1988 * Recommended e2fsprogs version: 1.39.cfs2-0
1990 * The backwards-compatible /proc/sys/portals symlink has been removed
1991 in this release. Before upgrading, please ensure that you change
1992 any configuration scripts or /etc/sysctl.conf files that access
1993 /proc/sys/portals/* or sysctl portals.* to use the corresponding
1994 entry in /proc/sys/lnet or sysctl lnet.*. This change can be made
1995 in advance of the upgrade on any system running Lustre 1.4.6 or
1996 newer, since /proc/sys/lnet was added in that version.
1997 * Note that reiserfs quotas are disabled on SLES 10 in this kernel
2001 Frequency : only when quota is used
2003 Description: avoid scanning export list for quota master
2004 Details : Change the algorithms to avoid scanning export list in order
2005 to improve the efficiency.
2008 Frequency : MDS failover only, very rarely
2010 Description: "went back in time" messages on mds failover
2011 Details : The greatest transno may be lost when the current operation
2012 finishes with an error (transno==0) and the client's last_rcvd
2013 record is over-written. Save the greatest transno in the
2014 mds_last_transno for this case.
2017 Frequency : always for specific kernels and striping counts
2019 Description: client may get "Matching packet too big" without ACL support
2020 Details : Clients compiled without CONFIG_FS_POSIX_ACL get an error message
2021 when trying to access files in certain configurations. The
2022 clients should in fact be denied when mounting because they do
2023 not understand ACLs.
2026 Frequency : Cray XT3 with more than 4000 clients and multiple jobs
2028 Description: many clients connecting with IO in progress causes connect timeouts
2029 Details : Avoid synchronous journal commits to avoid delays caused by many
2030 clients connecting/disconnecting when bulk IO is in progress.
2031 Queue liblustre connect requests on OST_REQUEST_PORTAL instead of
2032 OST_IO_PORTAL to avoid delays behind potentially many pending
2036 Frequency : occasionally with multiple writers to a single file
2038 Description: shared writes to file may result in wrong size reported by stat()
2039 Details : Allow growing of kms when extent lock is cancelled
2042 Frequency : always with random mmap IO to multi-striped file
2044 Description: mmap write might be lost if we are writing to a 'hole' in stripe
2045 Details : Only if the hole is at the end of OST object so that kms is too
2046 small. Fix is to increase kms accordingly in ll_nopage.
2049 Frequency : rare, only if OST filesystem is inconsistent with MDS filesystem
2051 Description: writes to a missing object would leak memory on the OST
2052 Details : If there is an inconsistency between the MDS and OST filesystems,
2053 such that the MDS references an object that doesn't exist, writes
2054 to that object will leak memory due to incorrect cleanup in the
2055 error handling path, eventually running out of memory on the OST.
2060 Description: Creating too long symlink causes lustre errors
2061 Details : Check symlink and name lengths before sending requests to MDS.
2064 Frequency : only if flock is enabled (not on by default)
2066 Description: posix locks not released on fd closure on 2.6.9+
2067 Details : We failed to add posix locks to list of inode locks on 2.6.9+
2068 kernels, this caused such locks not to be released on fd close and
2069 then assertions on fs unmount about still used locks.
2072 Frequency : MDS failover only, very rarely
2074 Description: clients may get ASSERTION(granted_lock != NULL)
2075 Details : When request was taking a long time, and a client was resending
2076 a getattr by name lock request. The were multiple lock requests
2077 with the same client lock handle and
2078 mds_getattr_name->fixup_handle_for_resent_request found one of the
2079 lock handles but later failed with ASSERTION(granted_lock != NULL).
2084 Description: handle->h_buffer_credits > 0, assertion failure
2085 Details : h_buffer_credits is zero after truncate, causing assertion
2086 failure. This patch extends the transaction or creates a new
2090 Frequency : NFS re-export or patchless client
2091 Bugzilla : 11179, 10796
2092 Description: Crash on NFS re-export node (__d_move)
2093 Details : We do not want to hash the dentry if we don't have a lock.
2094 But if this dentry is later used in d_move, we'd hit uninitialised
2095 list head d_hash, so we just do this to init d_hash field but
2096 leave dentry unhashed.
2099 Frequency : NFS re-export or patchless client
2101 Description: NFS exports has problem with symbolic link
2102 Details : lustre client didn't properly install dentry when re-exported
2103 to NFS or running patchless client.
2106 Frequency : NFS re-export or patchless client
2108 Description: Various nfs/patchless fixes.
2109 Details : fixes reuse disconected alias for lookup process - this fixes
2110 warning "find_exported_dentry: npd != pd",
2111 fix permission error with open files at nfs.
2112 fix apply umask when do revalidate.
2115 Frequency : occasional
2117 Description: Crash on NFS re-export node
2118 Details : calling clear_page() on the wrong pointer triggered oops in
2119 generic_mapping_read().
2122 Frequency : rarely, using O_DIRECT IO
2124 Description: unaligned directio crashes client with LASSERT
2125 Details : check for unaligned buffers before trying any requests.
2128 Frequency : rarely, using CFS RAID5 patches in non-standard kernel series
2130 Description: stale data returned from RAID cache
2131 Details : If only a small amount of IO is done to the RAID device before
2132 reading it again it is possible to get stale data from the RAID
2133 cache instead of reading it from disk.
2136 Frequency : always for sles10 kernel
2138 Description: sles10 support
2139 Details : ll_follow_link: compile fixes and using of nd_set_link
2140 under newer kernels.
2143 Frequency : depends on arch, kernel and compiler version, always on sles10
2146 Description: recursive or deep enough symlinks cause stack overflow
2147 Details : getting rid of large stack-allocated variable in
2151 Frequency : depends on hardware
2153 Description: lustre write performance loss in the SLES10 kernel
2154 Details : the performance loss is caused by using of write barriers in the
2155 ext3 code. The SLES10 kernel turns barrier support on by
2156 default. The fix is to undo that change for ldiskfs.
2158 ------------------------------------------------------------------------------
2160 2006-12-09 Cluster File Systems, Inc. <info@clusterfs.com>
2162 * Support for kernels:
2163 2.6.9-42.0.3EL (RHEL 4)
2164 2.6.5-7.276 (SLES 9)
2165 2.4.21-47.0.1.EL (RHEL 3)
2166 2.6.12.6 vanilla (kernel.org)
2170 Frequency : quota enabled and large files being deleted
2172 Description: releasing more than 4GB of quota at once hangs OST
2173 Details : If a user deletes more than 4GB of files on a single OST it
2174 will cause the OST to spin in an infinite loop. Release
2175 quota in < 4GB chunks, or use a 64-bit value for 1.4.7.1+.
2180 Description: statfs data retrieved from /proc may be stale or zero
2181 Details : When reading per-device statfs data from /proc, in the
2182 {kbytes,files}_{total,free,avail} files, it may appear
2183 as zero or be out of date.
2186 Frequency : systems with MD RAID1 external journal devices
2188 Description: lconf's call to blkid is confused by RAID1 journal devices
2189 Details : Use the "blkid -l" flag to locate the MD RAID device instead
2190 of returning all block devices that match the journal UUID.
2193 Frequency : always, for aggregate stripe size over 4GB
2195 Description: "lfs setstripe" fails assertion when setting 4GB+ stripe width
2196 Details : Using "lfs setstripe" to set stripe size * stripe count over 4GB
2197 will fail the kernel with "ASSERTION(lsm->lsm_xfersize != 0)"
2200 Frequency : always if "lfs find" used on a local file/directory
2202 Description: "lfs find" segfaults if used on a local file/directory
2203 Details : The case where a directory component was not specified wasn't
2204 handled correctly. Handle this properly.
2207 Frequency : always on ppc64
2209 Description: the write to an ext3 filesystem mounted with mballoc got stuck
2210 Details : ext3_mb_generate_buddy() uses find_next_bit() which does not
2211 perform endianness conversion.
2214 Frequency : rarely (truncate to non-zero file size after write under load)
2215 Bugzilla : 10730, 10687
2216 Description: Files padded with zeros to next 4K multiple
2217 Details : With filesystems mounted using the "extents" option (2.6 kernels)
2218 it is possible that files that are truncated to a non-zero size
2219 immediately after being written are filled with zero bytes beyond
2220 the truncated size. No file data is lost.
2222 Severity : enhancement
2224 Description: Allow recovery/failover for liblustre clients.
2225 Details : liblustre clients were unaware of failover configurations until
2228 Severity : enhancement
2230 Description: user file locks should fail when not mounting with flock option
2231 Details : Set up an error-returning stub in ll_file_operations.lock field
2232 to prevent incorrect behaviour when client is mounted without
2233 flock option. Also, set up properly f_op->flock field for
2237 Frequency : always on ia64
2239 Description: "lfs df" loops on printing out MDS statfs information
2240 Details : The obd_ioctl_data was not initialized and in some systems
2241 this caused a failure during the ioctl that did not return
2242 an error. Initialize the struct and return an error on failure.
2245 Frequency : SLES 9 only
2247 Description: Error of copying files with lustre special EAs as root
2248 Details : Client side always return success for setxattr call for lustre
2249 special xattr (currently only "trusted.lov").
2252 Frequency : rarely on clusters with both ia64+i386 clients
2254 Description: ia64+i686 clients doing shared IO on the same file may LBUG
2255 Details : In rare cases when both ia64+i686 (or other mixed-PAGE_SIZE)
2256 clients are doing concurrent writes to the same file it is
2257 possible that the ia64 clients may LASSERT because the OST
2258 extent locks are not PAGE_SIZE aligned. Ensure that grown
2259 locks are always aligned on the request boundary.
2262 Frequency : specific use, occasional
2264 Description: Overwriting in use executable truncates on-disk binary image
2265 Details : If one node attempts to overwrite an executable in use by
2266 another node, we now correctly return ETXTBSY instead of
2267 truncating the file.
2269 Severity : enhancement
2271 Description: Async OSC create to avoid the blocking unnecessarily.
2272 Details : If a OST has no remain object, system will block on the creating
2273 when need to create a new object on this OST. Now, ways use
2274 pre-created objects when available, instead of blocking on an
2275 empty osc while others are not empty. If we must block, we block
2276 for the shortest possible period of time.
2281 Description: chmod on Lustre root is propagated to other clients
2282 Details : Re-validate root's dentry in ll_lookup_it to avoid having it
2283 invalid by the follow_mount time.
2286 Frequency : liblustre clients only
2288 Description: Race in 'instant cancel' lock handling could lead to such locks
2289 never to be granted in case of SMP MDS
2290 Details : Do not destroy not yet granted but cbpending locks in
2294 Frequency : replay/resend of open
2296 Description: non null lock assetion failure in mds_intent_policy
2297 Details : Trying to replay/resend lockless open requests resulted in
2298 mds_open() returning 0 with no lock. Now it sets a flag if
2299 a lock is going to be returned.
2301 Severity : enhancement
2303 Description: Checksum enhancements
2304 Details : New checksum enhancements allow for resending RPCs that failed
2307 Severity : enhancement
2309 Description: Tunables on number of dirty pages in cacche
2310 Details : Allow to set limit on number of dirty pages cached.
2315 Description: client crash on unmount - lock still has references
2316 Details : In some error handling cases it was possible to leak a lock
2317 reference on a client while accessing a file. This was not
2318 harmful to the client during operation, but would cause the
2319 client to crash when the filesystem is unmounted.
2322 Frequency : specific case, rare
2324 Description: ETXTBSY on mds though file not in use by client
2325 Details : ETXTBSY is no longer incorrectly returned when attempting to
2326 chmod or chown a directory that the user previously tried to
2327 execute or a currently-executing binary.
2330 Frequency : extremely rare except on liblustre-based clients
2332 Description: Lustre space not freed when files are deleted
2333 Details : Clean up open-unlinked files after client eviction. Previously
2334 the unlink was skipped and the files remained as orphans.
2339 Description: OST failure "would be an LBUG" in waiting_locks_callback()
2340 Details : In some cases it was possible to send a blocking callback to
2341 a client doing a glimpse, even though that client didn't get
2342 a lock granted. When the glimpse lock is cancelled on the OST
2343 the freed lock is left on the waiting list and corrupted the list.
2346 Frequency : all core dumps
2348 Description: Broke core dumps to lustre
2349 Details : Negative dentry may be unhashed if parent does not have UPDATE
2350 lock, but some callers, e.g. do_coredump, expect dentry to be
2351 hashed after successful create, hash it in ll_create_it.
2353 ------------------------------------------------------------------------------
2355 2006-09-13 Cluster File Systems, Inc. <info@clusterfs.com>
2357 * Support for kernels:
2358 2.6.9-42.0.2.EL (RHEL 4)
2359 2.6.5-7.276 (SLES 9)
2360 2.4.21-40.EL (RHEL 3)
2361 2.6.12.6 vanilla (kernel.org)
2365 Frequency : always on RHEL 3
2367 Description: Number of open files grows over time
2368 Details : The number of open files grows over time, whether or not
2369 Lustre is started. This was due to a filp leak introduced
2370 by one of our kernel patches.
2372 ------------------------------------------------------------------------------
2374 08-20-2006 Cluster File Systems, Inc. <info@clusterfs.com>
2376 * Support for kernels:
2377 2.6.9-42.EL (RHEL 4)
2378 2.6.5-7.276 (SLES 9)
2379 2.4.21-40.EL (RHEL 3)
2380 2.6.12.6 vanilla (kernel.org)
2385 Bugzilla : 5719, 9635, 9792, 9684
2386 Description: OST (or MDS) trips assertions in (re)connection under heavy load
2387 Details : If a server is under heavy load and cannot reply to new
2388 connection requests before the client resends the (re)connect,
2389 the connection handling code can behave badly if two service
2390 threads are concurrently handing separate (re)connections from
2391 the same client. Add better locking to the connection handling
2392 code, and ensure that only a single connection will be processed
2393 for a given client UUID, even if the lock is dropped.
2395 Severity : enhancement
2397 Description: add TCP zero-copy support to kernel
2398 Details : Add support to the kernel TCP stack to allow zero-copy bulk
2399 sends if the hardware supports scatter-gather and checksumming.
2400 This allows socklnd to do client-write and server-read more
2401 efficiently and reduce CPU utilization from skbuf copying.
2404 Frequency : only if NFS exporting from client
2406 Description: NULL pointer deref in ll_iocontrol() if chattr mknod file
2407 Details : If setting attributes on a file created under NFS that had
2408 never been opened it would be possible to oops the client
2409 if the file had no objects.
2412 Frequency : always for liblustre
2414 Description: liblustre client does MDS+OSTs setattr RPC for each write
2415 Details : When doing a write from a liblustre client, the client
2416 incorrectly issued an RPC to the MDS and each OST the file was
2417 striped over in order to update the timestamps. When writing
2418 with small chunks and many clients this could overwhelm the MDS
2419 with RPCs. In all cases it would slow down the write because
2420 these RPCs are unnecessary.
2422 Severity : enhancement
2424 Description: allow number of MDS service threads to be changed at module load
2425 Details : It is now possible to change the number of MDS service threads
2426 running. Adding "options mds mds_num_threads={N}" to the MDS's
2427 /etc/modprobe.conf will set the number of threads for the next
2428 time Lustre is restarted (assuming the "mds" module is also
2429 reloaded at that time). The default number of threads will
2430 stay the same, 32 for most systems.
2435 Description: OST crash if filesystem is unformatted or corrupt
2436 Details : If an OST is started on a device that has never been formatted
2437 or if the filesystem is corrupt and cannot even mount then the
2438 error handling cleanup routines would dereference a NULL pointer.
2443 Description: NULL pointer deref in llap_from_page.
2444 Details : get_cache_page_nowait can return a page with NULL (or otherwise
2445 incorrect) mapping if the page was truncated/reclaimed while it was
2446 searched for. Check for this condition and skip such pages when
2447 doing readahead. Introduce extra check to llap_from_page() to
2448 verify page->mapping->host is non-NULL (so page is not anonymous).
2451 Frequency : Sometimes when using sys_sendfile
2453 Description: "page not covered by a lock" warnings from ll_readpage
2454 Details : sendfile called ll_readpage without right page locks present.
2455 Now we introduced ll_file_sendfile that does necessary locking
2456 around call to generic_file_sendfile() much like we do in
2460 Frequency : with certain MDS communication failures at client mount time
2462 Description: NULL pointer deref after failed client mount
2463 Details : a client connection request may delayed by the network layer
2464 and not be sent until after the PTLRPC layer has timed out the
2465 request. If the client fails the mount immediately it will try
2466 to clean up before the network times out the request. Add a
2467 reference from the request import to the obd device and delay
2468 the cleanup until the network drops the request.
2471 Frequency : occasionally during client (re)connect
2473 Description: assertion failure during client (re)connect
2474 Details : processing a client connection request may be delayed by the
2475 client or server longer than the client connect timeout. This
2476 causes the client to resend the connection request. If the
2477 original connection request is replied in this interval, the
2478 client may trip an assertion failure in ptlrpc_connect_interpret()
2479 which thought it would be the only running connect process.
2482 Frequency : only with obd_echo servers and clients that are rebooted
2484 Description: kernel BUG accessing uninitialized data structure
2485 Details : When running an obd_echo server it did not start the ping_evictor
2486 thread, and when a client was evicted an uninitialized data
2487 structure was accessed. Start the ping_evictor in the RPC
2488 service startup instead of the OBD startup.
2490 Severity : enhancement
2491 Bugzilla : 10193 (patchless)
2492 Description: Remove dependency on various unexported kernel interfaces.
2493 Details : No longer need reparent_to_init, exit_mm, exit_files,
2494 sock_getsockopt, filemap_populate, FMODE_EXEC, put_filp.
2497 Frequency : rare (only users of deprecated and unsupported LDAP config)
2499 Description: write_conf for zeroconf mount queried LDAP incorrectly for client
2500 Details : LDAP apparently contains 'lustreName' attributes instead of
2501 'name'. A simple remapping of the name is sufficient.
2504 Frequency : rare (only with non-default dump_on_timeout debug enabled)
2506 Description: waiting_locks_callback trips kernel BUG if client is evicted
2507 Details : Running with the dump_on_timeout debug flag turned on makes
2508 it possible that the waiting_locks_callback() can try to dump
2509 the Lustre kernel debug logs from an interrupt handler. Defer
2510 this log dumping to the expired_lock_main() thread.
2512 Severity : enhancement
2514 Description: Support NFS exporting on 2.6 kernels.
2515 Details : Implement non-rawops metadata methods for NFS server to use without
2516 changing NFS server code.
2519 Frequency : very rare (synthetic metadata workload only)
2521 Description: two racing renames might cause an MDS thread to deadlock
2522 Details : Running the "racer" program may cause one MDS thread to rename
2523 a file from being the source of a rename to being the target of
2524 a rename at exactly the same time that another thread is doing
2525 so, and the second thread has already enqueued these locks after
2526 doing a lookup of the target and is trying to relock them in
2527 order. Ensure that we don't try to re-lock the same resource.
2530 Frequency : only very large systems with liblustre clients
2532 Description: slow eviction of liblustre clients with the "evict_by_nid" RPC
2533 Details : Use asynchronous set_info RPCs to send the "evict_by_nid" to
2534 all OSTs in parallel. This allows the eviction of stale liblustre
2535 clients to proceed much faster than if they were done in series,
2536 and also offers similar improvements for other set_info RPCs.
2541 Description: excessive CPU usage during initial read phase on client
2542 Details : During the initial read phase on a client, it would agressively
2543 retry readahead on the file, consuming too much CPU and impacting
2544 performance (since 1.4.5.8). Improve the readahead algorithm
2545 to avoid this, and also improve some other common cases (read
2546 of small files in particular, where "small" is files smaller than
2547 /proc/fs/lustre/llite/*/max_read_ahead_whole_mb, 2MB by default).
2552 Description: MDS crash when receiving packet with unknown intent.
2553 Details : Do not LBUG in unknown intent case, just return -EFAULT
2555 Severity : enhancement
2556 Bugzilla : 9293, 9385
2557 Description: MDS RPCs are serialised on client. This is unnecessary for some.
2558 Details : Do not serialize getattr (non-intent version) and statfs.
2561 Frequency : occasional, when OST network is overloaded/intermittent
2563 Description: client evicted by OST after bulk IO timeout
2564 Details : If a client sends a bulk IO request (read or write) the OST
2565 may evict the client if it is unresposive to its data GET/PUT
2566 request. This is incorrect if the network is overloaded (takes
2567 too long to transfer the RPC data) or dropped the OST GET/PUT
2568 request. There is no need to evict the client at all, since
2569 the pinger and/or lock callbacks will handle this, and the
2570 client can restart the bulk request.
2573 Frequency : Always when mmapping file with no objects
2575 Description: client crashes when mmapping file with no objects
2576 Details : Check that we actually have objects in a file before doing any
2577 operations on objects in ll_vm_open, ll_vm_close and
2583 Description: Request leak when working with deleted CWD
2584 Details : Introduce advanced request refcount tracking for requests
2585 referenced from lustre intent.
2587 Severity : Enhancement
2589 Description: Cache open file handles on client.
2590 Details : MDS now will return special lock along with openhandle, if
2591 requested and client is allowed to hold openhandle, even if unused,
2592 until such a lock is revoked. Helps NFS a lot, since NFS is opening
2593 closing files for every read/write openration.
2595 Severity : Enhancement
2597 Description: Cache open negative dentries on client when possible.
2598 Details : Guard negative dentries with UPDATE lock on parent dir, drop
2599 negative dentries on lock revocation.
2604 Description: Remounting a client read-only wasn't possible with a zconf mount
2605 Details : It wasn't possible to remount a client read-only with llmount.
2607 Severity : enhancement
2608 Description: Include MPICH 1.2.6 Lustre ADIO interface patch
2609 Details : In lustre/contrib/ or /usr/share/lustre in RPM a patch for
2610 MPICH is included to add Lustre-specific ADIO interfaces.
2611 This is based closely on the UFS ADIO layer and only differs
2612 in file creation, in order to allow the OST striping to be set.
2613 This is user-contributed code and not supported by CFS.
2618 Description: extended inode attributes (immutable, append-only) work improperly
2619 when 2.4 and 2.6 kernels are used on client/server or vice versa
2620 Details : Introduce kernel-independent values for these flags.
2622 Severity : enhancement
2625 Description: Allow fractional MB tunings for lustre in /proc/ filesystem.
2626 Details : Many of the /proc/ tunables can only be tuned at a megabyte
2627 granularity. Now, Fractional MB granularity is be supported,
2628 this is very useful for low memory system.
2630 Severity : enhancement
2632 Description: Getattr by fid
2633 Details : Getting a file attributes by its fid, obtaining UPDATE|LOOKUP
2634 locks, avoids extra getattr rpc requests to MDS, allows '/' to
2635 have locks and avoids getattr rpc requests for it on every stat.
2638 Frequency : Always, for filesystems larger than 2TB
2640 Description: ldiskfs crash at mount for filesystem larger than 2TB with mballoc
2641 Details : Kenrel kmalloc limits allocations to 128kB and this prevents
2642 filesystems larger than 2TB to be mounted with mballoc enabled.
2645 Frequency : Always, for 32-bit kernel without CONFIG_LBD and filesystem > 2TB
2647 Description: ldiskfs crash at mount for filesystem larger than 2TB with mballoc
2648 Details : If a 32-bit kernel is compiled without CONFIG_LBD enabled and a
2649 filesystems larger than 2TB is mounted then the kernel will
2650 silently corrupt the start of the filesystem. CONFIG_LBD is
2651 enabled for all CFS-supported kernels, but the possibility of
2652 this happening with a modified kernel config exists.
2654 Severity : enhancement
2656 Description: add client O_DIRECT support for 2.6 kernels
2657 Details : It is now possible to do O_DIRECT reads and writes to files
2658 in the Lustre client mountpoint on 2.6 kernel clients.
2660 Severity : enhancement
2662 Description: parallel glimpse, setattr, statfs, punch, destroy requests
2663 Details : Sends glimpse, setattr, statfs, punch, destroy requests to OSTs in
2664 parallel, not waiting for response from every OST before sending
2665 a rpc to the next OST.
2670 Description: setattr vs write race when updating file timestamps
2671 Details : Client processes that update a file timestamp into the past
2672 right after writing to the file (e.g. tar) it is possible that
2673 the updated file modification time can be reset to the current
2674 time due to a race between processing the setattr and write RPC.
2676 Severity : enhancement
2678 Description: Bring 'lfs find' closer in line with regular Linux find.
2679 Details : lfs find util supports -atime, -mtime, -ctime, -maxdepth, -print,
2680 -print0 options and obtains all the needed info through the lustre
2683 Severity : enhancement
2685 Description: support up to 1024 configured devices on one node
2686 Details : change obd_dev array from statically allocated to dynamically
2687 allocated structs as they are first used to reduce memory usage
2692 Description: Flush dirty partially truncated pages during truncate
2693 Details : Immediatelly flush partially truncated pages in filter_setattr,
2694 this way we completely avoid having any pages in page cache on OST
2695 and can retire ugly workarounds during writes to flush such pages.
2700 Description: i_sem vs transaction deadlock in mds_obd_destroy during unlink.
2701 Details : protect inode from truncation within vfs_unlink() context
2702 just take a reference before calling vfs_unlink() and release it
2703 when parent's i_sem is free.
2708 Description: last_id value checked outside lock on OST caused LASSERT failure
2709 Details : If there were multiple MDS->OST object precreate requests in
2710 flight, it was possible that the OST's last object id was checked
2711 outside a lock and incorrectly tripped an assertion. Move checks
2712 inside locks, and discard old precreate requests.
2715 Frequency : always, if extents are used on OSTs
2717 Description: index ei_leaf_hi (48-bit extension) is not zeroed in extent index
2718 Details : OSTs using the extents format would not zero the high 16 bits of
2719 the index physical block number. This is not a problem for any
2720 OST filesystems smaller than 16TB, and no kernels support ext3
2721 filesystems larger than 16TB yet. This is fixed in 1.4.7 (all
2722 new/modified files) and can be fixed for existing filesystems
2723 with e2fsprogs-1.39-cfs1.
2728 Description: import connection selection may be incorrect if timer wraps
2729 Details : Using a 32-bit jiffies timer with HZ=1000 may cause backup
2730 import connections to be ignored if the 32-bit jiffies counter
2731 wraps. Use a 64-bit jiffies counter.
2734 Frequency : very large clusters immediately after boot
2736 Description: LNET request buffers exhausted under heavy short-term load
2737 Details : If a large number of client requests are generated on a service
2738 that has previously never seen so many requests it is possible
2739 that the request buffer growth cannot keep up with the spike in
2740 demand. Instead of dropping incoming requests, they are held in
2741 the LND until the RPC service can accept more requests.
2744 Frequency : Sometimes during replay
2746 Description: Assertion failure in ll_local_open after replay.
2747 Details : If replay happened on an open request reply before we were able
2748 to set replay handler, reply will become not swabbed tripping the
2749 assertion in ll_local_open. Now we set the handler right after
2750 recognising of open request
2753 Frequency : very rare
2755 Description: kernel reports "badness in vsnprintf"
2756 Details : Reading from the "recovery_status" /proc file in small chunks
2757 may cause a negative length in lprocfs_obd_rd_recovery_status()
2758 call to vsnprintf() (which is otherwise harmless). Exit early
2759 if there is no more space in the output buffer.
2761 Severity : enhancement
2763 Description: clear OBD RPC statistics by writing to them
2764 Details : It is now possible to clear the OBD RPC statistics by writing
2765 to the "stats" file.
2770 Description: Client mtime is not the same on different clients after utimes
2771 Details : In some cases, the client was using the utimes() syscall on
2772 a file cached on another node. The clients now validate the
2773 ctime from the MDS + OSTs to determine which one is right.
2778 Description: Inability to activate failout mode
2779 Details : lconf script incorrectly assumed that in pythong string's numeric
2780 value is used in comparisons.
2783 Frequency : always with multiple stripes per file
2785 Description: Inefficient object allocation for mutli-stripe files
2786 Details : When selecting which OSTs to stripe files over, for files with
2787 a stripe count that divides evenly into the number of OSTs,
2788 the MDS is always picking the same starting OST for each file.
2789 Return the OST selection heuristic to the original design.
2794 Description: mount failures may take full timeout to return an error
2795 Details : Under some heavy load conditions it is possible that a
2796 failed mount can wait for the full obd_timeout interval,
2797 possibly several minutes, before reporting an error.
2798 Instead return an error as soon as the status is known.
2800 Frequency : quota enabled and large files being deleted
2802 Description: releasing more than 4GB of quota at once hangs OST
2803 Details : If a user deletes more than 4GB of files on a single OST it
2804 will cause the OST to spin in an infinite loop. Release
2805 quota in < 4GB chunks, or use a 64-bit value for 1.4.7.1+.
2810 Description: statfs data retrieved from /proc may be stale or zero
2811 Details : When reading per-device statfs data from /proc, in the
2812 {kbytes,files}_{total,free,avail} files, it may appear
2813 as zero or be out of date.
2816 Frequency : systems with MD RAID1 external journal devices
2818 Description: lconf's call to blkid is confused by RAID1 journal devices
2819 Details : Use the "blkid -l" flag to locate the MD RAID device instead
2820 of returning all block devices that match the journal UUID.
2823 Frequency : always, for aggregate stripe size over 4GB
2825 Description: assertion fails when trying to use 4GB stripe size
2826 Details : Use "setstripe" to set stripe size over 4GB will fail the kernel,
2827 complaining "ASSERTION(lsm->lsm_xfersize != 0)"
2830 Frequency : always on ppc64
2832 Description: the first write on an ext3 filesystem with mballoc got stuck
2833 Details : ext3_mb_generate_buddy() uses find_next_bit() which does not
2834 perform endianness conversion.
2836 ------------------------------------------------------------------------------
2838 02-14-2006 Cluster File Systems, Inc. <info@clusterfs.com>
2840 * WIRE PROTOCOL CHANGE. This version of Lustre networking WILL NOT
2841 INTEROPERATE with older versions automatically. Please read the
2842 user documentation before upgrading any part of a live system.
2843 * WARNING: Lustre networking configuration changes are required with
2844 this release. See https://bugzilla.clusterfs.com/show_bug.cgi?id=10052
2847 * Support for kernels:
2848 2.6.9-22.0.2.EL (RHEL 4)
2849 2.6.5-7.244 (SLES 9)
2850 2.6.12.6 vanilla (kernel.org)
2853 Severity : enhancement
2854 Bugzilla : 7981/8208
2855 Description: Introduced Lustre Networking (LNET)
2856 Details : LNET is new networking infrastructure for Lustre, it includes
2857 a reorganized network configuration mode (see the user
2858 documentation for full details) as well as support for routing
2859 between different network fabrics. Lustre Networking Devices
2860 (LNDs) for the supported network fabrics have also been
2861 created for this new infrastructure.
2863 Severity : enhancement
2864 Description: Introduced Access control lists
2865 Details : clients can set ACLs on files and directories in order to have
2866 more fine-grained permissions than the standard Unix UGO+RWX.
2867 The MDS must be started with the "-o acl" mount option.
2869 Severity : enhancement
2870 Description: Introduced filesystem quotas
2871 Details : Administrators may now establish per-user quotas on the
2874 Severity : enhancement
2876 Description: Configuration change for the XT3
2877 The PTLLND is now used to run Lustre over Portals on the XT3
2878 The configure option(s) --with-cray-portals are no longer used.
2879 Rather --with-portals=<path-to-portals-includes> is used to
2880 enable building on the XT3. In addition to enable XT3 specific
2881 features the option --enable-cray-xt3 must be used.
2886 Description: Running on many-way SMP OSTs can trigger oops in llcd_send()
2887 Details : A race between allocating a new llcd and re-getting the llcd_lock
2888 allowed another thread to grab newly-allocated llcd.
2890 Severity : enhancement
2892 Description: 2.6 OST async journal commit and locking fix to improve performance
2893 Details : The filter_direct_io()+filter_commitrw_write() journal commits for
2894 2.6 kernels are now async as they already were in 2.4 kernels so
2895 that they can commit concurrently with the network bulk transfer.
2896 For block-allocated files the filter allocation semaphore is held
2897 to avoid filesystem fragmentation during allocation. BKL lock
2898 removed for 2.6 xattr operations where it is no longer needed.
2903 Description: lconf incorrectly determined whether two IP networks could talk
2904 Details : In some more complicated routing and multiple-network
2905 configurations, lconf will avoid trying to make a network
2906 connection to a disjoint part of the IP space. It was doing the
2907 math incorrectly for one set of cases.
2912 Description: Fix for potential infinite loop processing records in an llog.
2913 Details : If an llog record is corrupted/zeroed, it is possible to loop
2914 forever in llog_process(). Validate the llog record length
2915 and skip the remainder of the block on error.
2918 Frequency : occasional (liblustre only)
2920 Description: liblustre could not open files whose last component is a symlink
2921 Details : sysio_path_walk() would incorrectly pass the open intent to
2922 intermediate path components.
2925 Frequency : rare (liblustre only with non-standard tuning)
2926 Bugzilla : 7201 (7350)
2927 Description: Tuning the MDC DLM LRU size to zero triggers client LASSERT
2928 Details : llu_lookup_finish_locks() tries to set lock data on a lock
2929 after it has been released, only do this for referenced locks
2931 Severity : enhancement
2933 Description: specifying an (invalid) directory default stripe_size of -1
2934 would reset the directory default striping
2935 Details : stripe_size -1 was used internally to signal directory stripe
2936 removal, now use "all default" to signal dir stripe removal
2937 as a directory striping of "all default" is not useful
2940 Frequency : common for large clusters running liblustre clients
2942 Description: doing an ls when liblustre clients are running is slow
2943 Details : sending a glimpse AST to a liblustre client waits for every AST
2944 to time out, as liblustre clients will not respond. Since they
2945 cannot cache data we refresh the OST lock LVB from disk instead.
2947 Severity : enhancement
2949 Description: doing an ls at the same time as file IO can be slow
2950 Details : enqueue and other "small" requests can be blocked behind many
2951 large IO requests. Create a new OST IO portal for non-IO
2952 requests so they can be processed faster.
2955 Frequency : rare (only HPUX clients mounting unsupported re-exported NFS vol)
2957 Description: an HPUX NFS client would get -EACCESS when ftruncate()ing a newly
2958 created file with mode 000
2959 Details : the Linux NFS server relies on an MDS_OPEN_OWNEROVERRIDE hack to
2960 allow an ftruncate() as a non-root user to a file with mode 000.
2961 Lustre now respects this flag to disable mode checks when
2962 truncating a file owned by the user
2965 Frequency : liblustre-only, when liblustre client dies unexpectedly or becomes
2968 Description: Revoking locks from clients that went dead or catatonic might take
2970 Details : New lock flags FL_CANCEL_ON_BLOCK used by liblustre makes
2971 cancellation of such locks instant on servers without waiting for
2972 any reply from clients. Clients drops these locks when cancel
2973 notification from server is received without replying.
2976 Frequency : liblustre-only, when liblustre client dies or becomes busy
2978 Description: Doing ls on Linux clients can take a long time with active
2980 Details : Liblustre client cannot handle ASTs in timely manner, so avoid
2981 granting such locks to it in the first place if possible. Locks
2982 are taken by proxy on the OST during the read or write and
2983 dropped immediately afterward. Add connect flags handling, do
2984 not grant locks to liblustre clients for glimpse ASTs.
2986 Severity : enhancement
2988 Description: Improve read-ahead algorithm to avoid excessive IO for random reads
2989 Details : Existing read-ahead algorithm is tuned for the case of streamlined
2990 sequential reads and behaves badly with applications doing random
2991 reads. Improve it by reading ahead at least read region, and
2992 avoiding excessive large RPC for small reads.
2994 Severity : enhancement
2996 Description: Creating more than 1000 files for a single job may cause a load
2997 imbalance on the OSTs if there are also a large number of OSTs.
2998 Details : qos_prep_create() uses an OST index reseed value that is an
2999 even multiple of the number of available OSTs so that if the
3000 reseed happens in the middle of the object allocation it will
3001 still utilize the OSTs as uniformly as possible.
3006 Description: OST or MDS may oops in ping_evictor_main()
3007 Details : ping_evictor_main() drops obd_dev_lock if deleting a stale export
3008 but doesn't restart at beginning of obd_exports_timed list
3011 Severity : enhancement
3013 Description: improve by-nid export eviction on the MDS and OST
3014 Details : allow multiple exports with the same NID to be evicted at one
3015 time without re-searching the exports list.
3018 Frequency : rare, only with supplementary groups enabled on SMP 2.6 kernels
3020 Description: MDS may oops in groups_free()
3021 Details : in rare race conditions a newly allocated group_info struct is
3022 freed again, and this can be NULL. The 2.4 compatibility code
3023 for groups_free() checked for a NULL pointer, but 2.6 did not.
3026 Frequency : common for liblustre clients doing little filesystem IO
3027 Bugzilla : 9352, 7313
3028 Description: server may evict liblustre clients accessing contended locks
3029 Details : if a client is granted a lock or receives a completion AST
3030 with a blocking AST already set it would not reply to the AST
3031 for LDLM_FL_CANCEL_ON_BLOCK locks. It now replies to such ASTs.
3034 Frequency : lfs setstripe, only systems with more than 160 OSTs
3036 Description: unable to set striping with a starting offset beyond OST 160
3037 Details : llapi_create_file() incorrectly limited the starting stripe
3038 index to the maximum single-file stripe count.
3041 Frequency : LDAP users only
3043 Description: lconf did not handle in-kernel recovery with LDAP properly
3044 Details : lconf/LustreDB get_refs() is searching the wrong namespace
3046 Severity : enhancement
3048 Description: bind OST threads to NUMA nodes to improve performance
3049 Details : all OST threads are uniformly bound to CPUs on a single NUMA
3050 node and do their allocations there to localize memory access
3052 Severity : enhancement
3054 Description: llmount can determine client NID directly from Myrinet (GM)
3055 Details : the client NID code from gmnalnid was moved directly into
3056 llmount, removing the need to use this or specifying the
3057 client NID explicitly when mounting GM clients with zeroconf
3060 Frequency : if client is started with down MDS
3062 Description: if client is started with down MDS mount hangs in ptlrpc_queue_wait
3063 Details : Having an LWI_INTR() wait event (interruptible, but no timeout)
3064 will wait indefinitely in ptlrpc_queue_wait->l_wait_event() after
3065 ptlrpc_import_delayed_req() because we didn't check if the
3066 request was interrupted, and we also didn't break out of the
3067 event loop if there was no timeout
3072 Description: data loss during non-page-aligned writes to a single file from
3073 both multiple nodes and multiple threads on one node at same time
3074 Details : updates to KMS and lsm weren't protected by common lock. Resulting
3075 inconsistency led to false short-reads, that were cached and later
3076 used by ->prepare_write() to fill in partially written page,
3077 leading to data loss.
3080 Frequency : always, if lconf --abort_recovery used
3082 Description: lconf --abort_recovery fails with 'Operation not supported'
3083 Details : lconf was attempting to abort recovery on the MDT device and not
3086 Severity : enhancement
3088 Description: remove cleanup logs
3089 Details : replace lconf-generated cleanup logs with lustre internal
3090 cleanup routines. Eliminates the need for client-cleanup and
3093 Severity : enhancement
3095 Description: add support for EAs (user and system) on lustre filesystems
3096 Details : it is now possible to store extended attributes in the Lustre
3097 client filesystem, and with the user_xattr mount option it
3098 is possible to allow users to store EAs on their files also
3100 Severity : enhancement
3102 Description: Add possibility (config option) to show minimal available OST free
3104 Details : When compiled with --enable-mindf configure option, statfs(2)
3105 (and so, df) will return least minimal free space available from
3106 all OSTs as amount of free space on FS, instead of summary of
3107 free spaces of all OSTs.
3109 Severity : enhancement
3111 Description: do not expand extent locks acquired on OST-side
3112 Details : Modify ldlm_extent_policy() to not expand local locks, acquired
3113 by server: they are not cached anyway.
3116 Frequency : when mmap is used/binaries executed from Lustre
3118 Description: Unmmap pages before throwing them away from read cache.
3119 Details : llap_shrink cache now attempts to unmap pages before discarding
3120 them (if unmapping failed - do not discard). SLES9 kernel has
3121 extra checks that trigger if this unmapping is not done first.
3126 Description: lconf didn't resolve symlinks before checking to see whether a
3127 given mountpoint was already in use
3130 Frequency : when migrating failover services
3131 Bugzilla : 6395, 9514
3132 Description: When migrating a subset of services from a node (e.g. failback
3133 from a failover service node) the remaining services would
3134 time out and evict clients.
3135 Details : lconf --force (implied by --failover) sets the global obd_timeout
3136 to 5 seconds in order to quickly disconnect, but this caused
3137 other RPCs to time out too quickly. Do not change the global
3138 obd_timeout for force cleanup, only set it for DISCONNECT RPCs.
3140 Severity : enhancement
3141 Frequency : if MDS is started with down OST
3142 Bugzilla : 9439,5706
3143 Description: Allow startup/shutdown of an MDS without depending on the
3144 availability of the OSTs.
3145 Details : Asynchronously call mds_lov_synchronize during MDS startup.
3146 Add appropriate locking and lov-osc refcounts for safe
3147 cleaning. Add osc abort_inflight calls in case the
3148 synchronize never started.
3151 Frequency : occasional (Cray XT3 only)
3153 Description: root not authorized to access files in CRAY_PORTALS environment
3154 Details : The client process capabilities were not honoured on the MDS in
3155 a CRAY_PORTALS/CRAY_XT3 environment. If the file had previously
3156 been accessed by an authorized user then root was able to access
3157 the file on the local client also. The root user capabilities
3158 are now allowed on the MDS, as this environment has secure UID.
3161 Frequency : occasional
3163 Description: ldiskfs "too long searching" message happens too often
3164 Details : A debugging message (otherwise harmless) prints too often on
3165 the OST console. This has been reduced to only happen when
3166 there are fragmentation problems on the filesystem.
3171 Description: Division by zero in statfs when all OSCs are inactive
3172 Details : lov_get_stripecnt() returns zero due to incorrect order of checks,
3173 lov_statfs divides by value returned by lov_get_stripecnt().
3177 Bugzilla : 9489, 3273
3178 Description: First write from each client to each OST was only 4kB in size,
3179 to initialize client writeback cache, which caused sub-optimal
3180 RPCs and poor layout on disk for the first writen file.
3181 Details : Clients now request an initial cache grant at (re)connect time
3182 and so that they can start streaming writes to the cache right
3183 away and always do full-sized RPCs if there is enough data.
3184 If the OST is rebooted the client also re-establishes its grant
3185 so that client cached writes will be honoured under the grant.
3190 Description: Slow ls (and stat(2) syscall) on files residing on IO-loaded OSTs
3191 Details : Now I/O RPCs go to different portal number and (presumably) fast
3192 lock requests (and glimses) and other RPCs get their own service
3193 threads pool that should be able to service those RPCs
3196 Severity : enhancement
3198 Description: Ability to exchange lustre version between client and servers and
3199 issue warnings at client side if client is too old. Also for
3200 liblustre clients there is ability to refuse connection of too old
3202 Details : New 'version' field is added to connect data structure that is
3203 filled with version info. That info is later checked by server and
3207 Frequency : rare, liblustre only.
3208 Bugzilla : 9296, 9581
3209 Description: Two simultaneous writes from liblustre at offset within same page
3210 might proceed at the same time overwriting eachother with stale
3212 Details : I/O lock withing llu_file_prwv was released too early, before data
3213 actually was hitting the wire. Extended lock-holding time until
3214 server acknowledges receiving data.
3217 Frequency : extremely rare. Never observed in practice.
3219 Description: avoid generating lustre_handle cookie of 0.
3220 Details : class_handle_hash() generates handle cookies by incrementing
3221 global counter, and can hit 0 occasionaly (this is unlikely, but
3222 not impossible, because initial value of cookie counter is
3223 selected randonly). Value of 0 is used as a sentinel meaning
3224 "unassigned handle" --- avoid it. Also coalesce two critical
3225 sections in this function into one.
3227 Severity : enhancement
3229 Description: allow liblustre clients to delegate truncate locking to OST
3230 Details : To avoid overhead of locking, liblustre client instructs OST to
3231 take extent lock in ost_punch() on client's behalf. New connection
3232 flag is added to handle backward compatibility.
3234 Severity : enhancement
3235 Bugzilla : 4928, 7341, 9758
3236 Description: allow number of OST service threads to be specified
3237 Details : a module parameter allows the number of OST service threads
3238 to be specified via "options ost ost_num_threads={N}" in the
3239 OSS's /etc/modules.conf or /etc/modprobe.conf.
3243 Bugzilla : 6146, 9635, 9895
3244 Description: servers crash with bad pointer in target_handle_connect()
3245 Details : In rare cases when a client is reconnecting it was possible that
3246 the connection request was the last reference for that export.
3247 We would temporarily drop the export reference and get a new
3248 one, but this may have been the last reference and the export
3249 was just destroyed. Get new reference before dropping old one.
3251 Severity : enhancement
3252 Frequency : if client is started with failover MDS
3254 Description: Allow multiple MDS hostnames in the mount command
3255 Details : Try to read the configuration from all specified MDS
3256 hostnames during a client mount in case the "primary"
3259 Severity : enhancement
3261 Description: Stop sending data to evicted clients as soon as possible.
3262 Details : Check if the client we are about to send or are sending data to
3263 was evicted already. (Check is done every second of waiting,
3264 for which l_wait_event interface was extended to allow checking
3265 of exit condition at specified intervals).
3268 Frequency : rare, normally only when NFS exporting is done from client
3270 Description: 'bad disk LOV MAGIC: 0x00000000' error when chown'ing files
3272 Details : Make mds_get_md() recognise empty md case and set lmm size to 0.
3275 Frequency : always, if srand() is called before liblustre initialization
3277 Description: Liblustre uses system PRNG disturbing its usage by user application
3278 Details : Introduce internal to lustre fast and high-quality PRNG for
3279 lustre usage and make liblustre and some other places in generic
3280 lustre code to use it.
3282 Severity : enhancement
3283 Bugzilla : 9477, 9557, 9870
3284 Description: Verify that the MDS configuration logs are updated when xml is
3285 Details : Check if the .xml configuration logs are newer than the config
3286 logs stored on the MDS and report an error if this is the case.
3287 Request --write-conf, or allow starting with --old_conf.
3289 Severity : enhancement
3291 Description: Handle symlinks in the path when checking if Lustre is mounted.
3292 Details : Resolve intermediate symlinks when checking if a client has
3293 mounted a filesystem to avoid duplicate client mounts.
3298 Description: lconf can hit an error exception but still return success.
3299 Details : The lconf command catches the Command error exception at the top
3300 level script context and will exit with the associated exit
3301 status, but doesn't ensure that this exit status is non-zero.
3306 Description: failure of ptlrpc thread startup can cause oops
3307 Details : Starting a ptlrpc service thread can fail if there are a large
3308 number of threads or the server memory is very fragmented.
3309 Handle this without oopsing.
3312 Frequency : always, only if liblustre and non-default acceptor port was used
3314 Description: liblustre cannot connect to servers with non-default acceptor port
3315 Details : tcpnal_set_default_params() was not called and was therefore
3316 ignoring the environment varaible TCPNAL_PORT, as well as other
3317 TCPNAL_ environment variables
3322 Description: two objects could be created on the same OST for a single file
3323 Details : If an OST is down, in some cases it was possible to create two
3324 objects on a single OST for a single file. No problems other
3325 than potential performance impact and spurious error messages.
3329 Bugzilla : 5681, 9562
3330 Description: Client may oops in ll_unhash_aliases
3331 Details : Client dcache may become inconsistent in race condition.
3332 In some cases "getcwd" can fail if the current directory is
3338 Description: Inode refcounting problems in NFS export code
3339 Details : link_raw functions used to call d_instantiate without obtaining
3340 extra inode reference first.
3344 Bugzilla : 9942, 9903
3345 Description: Referencing freed requests leading to crash, memleaks with NFS.
3346 Details : We used to require that call to ll_revalidate_it was always
3347 followed by ll_lookup_it. Also with revalidate_special() it is
3348 possible to call ll_revalidate_it() twice for the same dentry
3349 even if first occurence returned success. This fix changes semantic
3350 between DISP_ENQ_COMPLETE disposition flag to mean there is extra
3351 reference on a request referred from the intent.
3352 ll_intent_release() then releases such a request.
3355 Frequency : rare, normally benchmark loads only
3357 Description: unlinked inodes were kept in memory on the client
3358 Details : If a client is repeatedly creating and unlinking files it
3359 can accumulate a lot of stale inodes in the inode slab cache.
3360 If there is no other client load running this can cause the
3361 client node to run out of memory. Instead flush old inodes
3362 from client cache that have the same inode number as a new inode.
3365 Frequency : SLES9 2.6.5 kernel and long filenames only
3366 Bugzilla : 9969, 10379
3367 Description: utime reports stale NFS file handle
3368 Details : SLES9 uses out-of-dentry names in some cases, which confused
3369 the lustre dentry revalidation. Change it to always use the
3373 Frequency : rare, unless heavy write-truncate concurrency is continuous
3374 Bugzilla : 4180, 6984, 7171, 9963, 9331
3375 Description: OST becomes very slow and/or deadlocked during object unlink
3376 Details : filter_destroy() was holding onto the parent directory lock
3377 while truncating+unlinking objects. For very large objects this
3378 may block other threads for a long time and slow overall OST
3379 responsiveness. It may also be possible to get a lock ordering
3380 deadlock in this case, or run out of journal credits because of
3381 the combined truncate+unlink. Solution is to do object truncate
3382 first in one transaction without parent lock, and then do the
3383 final unlink in a new transaction with the parent lock. This
3384 reduces the lock hold time dramatically.
3387 Frequency : rare, 2.4 kernels only
3389 Description: MDS or OST cleanup may trip kernel BUG when dropping kernel lock
3390 Details : mds_cleanup() and filter_cleanup() need to drop the kernel lock
3391 before unmounting their filesystem in order to avoid deadlock.
3392 The kernel_locked() function in 2.4 kernels only checks whether
3393 the kernel lock is held, not whether it is this process that is
3394 holding it as 2.6 kernels do.
3399 Description: MDS or OST may oops/LBUG if a client is connecting multiple times
3400 Details : The client ptlrpc code may be trying to reconnect to a down
3401 server before a previous connection attempt has timed out.
3402 Increase the reconnect interval to be longer than the connection
3403 timeout interval to avoid sending duplicate connections to
3407 Frequency : echo_client brw_test command
3409 Description: fix echo_client to work with OST preallocated code
3410 Details : OST preallocation code (5137) didn't take echo_client IO path
3411 into account: echo_client calls filter methods outside of any
3412 OST thread and, hence, there is no per-thread preallocated
3413 pages and buffers to use. Solution: hijack pga pages for IO. As
3414 a byproduct, this avoids unnecessary data copying.
3418 Bugzilla : 3555, 5962, 6025, 6155, 6296, 9574
3419 Description: Client can oops in mdc_commit_close() after open replay
3420 Details : It was possible for the MDS to return an open request with no
3421 transaction number in mds_finish_transno() if the client was
3422 evicted, but without actually returning an error. Clients
3423 would later try to replay that open and may trip an assertion
3424 Simplify the client close codepath, and always return an error
3425 from the MDS in case the open is not successful.
3428 Frequency : rare, 2.6 OSTs only
3430 Description: OST may deadlock under high load on fragmented files
3431 Details : If there was a heavy load and highly-fragmented OST filesystems
3432 it was possible to have all the OST threads deadlock waiting on
3433 allocation of biovecs, because the biovecs were not released
3434 until the entire RPC IO was completed. Instead, release biovecs
3435 as soon as they are complete to ensure forward IO progress.
3437 Severity : enhancement
3439 Description: Support for specifying external journal device at mount
3440 Details : If an OST or MDS device is formatted with an external journal
3441 device, this device major/minor is stored in the ext3 superblock
3442 and may not be valid for failover. Allow detecting and
3443 specifying the external journal at mount time.
3448 Description: Mounting an MDS with pending unlinked files may cause oops
3449 Details : target_finish_recovery() calls mds_postrecov() which returned
3450 the number of orphans unlinked. mds_lov_connect->mds_postsetup()
3451 considers this an error and immediately begins cleaning up the
3452 lov, just after starting the mds_lov process
3454 Severity : enhancement
3456 Description: Implement 'lfs df' to report actual free space on per-OST basis
3457 Details : Add sub-command 'df' on 'lfs' to report the disk space usage of
3458 MDS/OSDs. Usage: lfs df [-i][-h]. Command Options: '-i' to report
3459 usage of objects; '-h' to report in human readable format.
3461 ------------------------------------------------------------------------------
3463 08-26-2005 Cluster File Systems, Inc. <info@clusterfs.com>
3470 Description: Mounting an ldiskfs file system with mballoc may crash OST node.
3471 Details : ldiskfs mballoc code may reference an uninitialized buddy struct
3472 at startup during orphan unlinking. Instead, skip buddy update
3473 before setup, as it will be regenerated after recovery is complete.
3478 Description: If an OST is inactive, its locks might reference stale inodes.
3479 Details : lov_change_cbdata() must iterate over all namespaces, even if
3480 they are inactive to clear inode references from the lock.
3482 Severity : enhancement
3483 Frequency : occasional, if non-standard max_dirty_mb used
3485 Description: Client will block write RPCs if not enough grant
3486 Details : If a client has max_dirty_mb smaller than max_rpcs_in_flight,
3487 then the client will block writes while waiting for another RPC
3488 to complete instead of consuming its dirty limit. With change
3489 we get improved performance when max_dirty_mb is small.
3491 Severity : enhancement
3492 Bugzilla : 3389, 6253
3493 Description: Add support for supplementary groups on the MDS.
3494 Details : The MDS has an upcall /proc/fs/lustre/mds/{mds}/group_upcall
3495 (set to /usr/sbin/l_getgroups if enabled) which will do MDS-side
3496 lookups for user supplementary groups into a cache.
3500 Description: O_CREAT|O_EXCL open flags in liblustre always return -EEXIST
3501 Details : Make libsysio to not enforce O_EXCL by clearing the flag,
3502 for liblustre O_EXCL is enforced by MDS.
3506 Description: readdir never returns NULL in liblustre.
3507 Details : Corrected llu_iop_getdirentries logic, to return offset of next
3508 dentry in struct dirent.
3512 Frequency : liblustre only, depends on application IO pattern
3513 Description: liblustre clients evicted if not contacting servers
3514 Details : Don't put liblustre clients into the ping_evictor list, so
3515 they will not be evicted by the pinger ever.
3517 Severity : enhancement
3519 Description: Add ability to evict clients by NID from MDS.
3520 Details : By echoing "nid:$NID" string into
3521 /proc/fs/lustre/mds/.../evict_client client with nid that equals to
3522 $NID would be instantly evicted from this MDS and from all active
3523 OSTs connected to it.
3527 Description: Do not query file size twice, somewhat slowing stat(2) calls.
3528 Details : lookup_it_finish() used to query file size from OSTs that was not
3533 Description: service threads change working directory to that of init
3534 Details : Starting lustre service threads may pin the working directory
3535 of the parent thread, making that filesystem busy. Threads
3536 now change to the working directory of init to avoid this.
3540 Frequency : during shutdown only
3541 Description: shutdown with a failed MDS or OST can cause unmount to hang
3542 Details : Don't resend DISCONNECT messages in ptlrpc_disconnect_import()
3547 Frequency : 2.6 only
3548 Description: chmod/chown may include an extra supplementary group
3549 Details : ll{,u}_mdc_pack_op_data() does not properly initialize the
3550 supplementary group and if none is specified this is used.
3553 Bugzilla : 5479 (6816)
3555 Description: Racing open + rm can assert client in mdc_set_open_replay_data()
3556 Details : If lookup is in progress on a file that is unlinked we might try
3557 to revalidate the inode and fail in revalidate after lookup is
3558 complete and ll_file_open() enqueues the open again but
3559 it_open_error() was not checking DISP_OPEN_OPEN errors correctly.
3562 Frequency : always, if lconf --abort_recovery used
3564 Description: lconf --abort_recovery fails with 'Operation not supported'
3565 Details : lconf was attempting to abort recovery on the MDT device and not
3568 ------------------------------------------------------------------------------
3570 2005-08-08 Cluster File Systems, Inc. <info@clusterfs.com>
3575 Frequency : rare (only unsupported configurations with a node running as an
3577 Bugzilla : 6514, 5137
3578 Description: Mounting a Lustre file system on a node running as an OST could
3580 Details : OSTs now preallocates memory needed to write out data at
3581 startup, instead of when needed, to avoid having to
3582 allocate memory in possibly low memory situations.
3583 Specifically, if the file system is mounted on on OST,
3584 memory pressure could force it to try to write out data,
3585 which it needed to allocate memory to do. Due to the low
3586 memory, it would be unable to do so and the node would
3587 become unresponsive.
3589 Severity : enhancement
3591 Description: Addition of lconf --service command line option
3592 Details : lconf now accepts a '--service <arg>' option, which is
3593 shorthand for 'lconf --group <arg> --select <arg>=<hostname>'
3595 Severity : enhancement
3597 Description: Failover mode is now the default for OSTs.
3598 Details : By default, OSTs will now run in failover mode. To return to
3599 the old behaviour, add '--failout' to the lmc line for OSTs.
3601 Severity : enhancement
3603 Description: Health checks are now provided for MDS and OSTs
3604 Details : Additional detailed health check information on MSD and OSTs
3605 is now provided through the procfs health_check value.
3608 Frequency : occasional, depends on IO load
3610 Description: Disk fragmentation on the OSTs could eventually cause slowdowns
3611 after numerous create/delete cycles
3612 Details : The ext3 inode allocation policy would not allocate new inodes
3613 very well on the OSTs because there are no new directories
3614 being created. Instead we look for groups with free space if
3615 the parent directories are nearly full.
3620 Description: Network or server problems during mount may cause partially
3621 mounted clients instead of returning an error.
3622 Details : The config llog parsing code may overwrite the error return
3623 code during mount error handling, returning success instead
3629 Description: MDS can fail to allocate large reply buffers
3630 Details : After long uptimes the MDS can fail to allocate large reply
3631 buffers (e.g. zconf client mount config records) due to memory
3632 fragmentation or consumption by the buffer cache. Preallocate
3633 some large reply buffers so that these replies can be sent even
3634 under memory pressure.
3638 Frequency : rare (liblustre)
3639 Description: fsx running with liblustre complained that using truncate() to
3640 extend the file doesn't work. This patch corrects that issue.
3641 Details : This is the liblustre equivalent of the fix for bug 6196. Fixes
3642 ATTR_SIZE and lsm use in llu_setattr_raw.
3646 Frequency : rare, only 2.6 kernels
3647 Description: Unusual file access patterns on the MDS may result in inode
3648 data being lost in very rare circumstances.
3649 Details : Bad interaction between the ea-in-inode patch and the "no-read"
3650 code in the 2.6 kernel caused the inode and/or EA data not to
3651 be read from disk, causing single-file corruption.
3655 Frequency : rare, only 2.6 filesystems using extents
3656 Description: Heavy concurrent write and delete load may cause data corruption.
3657 Details : It was possible under high-load situations to have an extent
3658 metadata block in the block device cache from a just-unlinked
3659 file overwrite a newly-allocated data block. We now unmap any
3660 metadata buffers that alias just-allocated data blocks.
3664 Frequency : filesystems with default stripe_count larger than 77
3665 Description: lconf+mke2fs fail when formatting filesystem with > 77 stripes
3666 Details : lconf specifies an inode size of 4096 bytes when the default
3667 stripe_count is larger than 77. This conflicts with the default
3668 inode density of 1 per 4096 bytes. Allocate smaller inodes in
3669 this case to avoid pinning too much memory for large EAs.
3671 ------------------------------------------------------------------------------
3673 2005-07-07 Cluster File Systems, Inc. <info@clusterfs.com>
3678 Frequency : rare (extremely heavy IO load with hundreds of clients)
3680 Description: Client is evicted, gets IO error writing to file
3681 Details : lock ordering changes for bug 5492 reintroduced bug 3267 and
3682 caused clients to be evicted for AST timeouts. The fixes in
3683 bug 5192 mean we no longer need to have such short AST timeouts
3684 so ldlm_timeout has been increased.
3687 Frequency : occasional during --force or --failover shutdown under load
3688 Bugzilla : 5949, 4834
3689 Description: Server oops/LBUG if stopped with --force or --failover under load
3690 Details : a collection of import/export refcount and cleanup ordering
3691 issues fixed for safer force cleanup
3694 Frequency : only filesystems larger than 120 OSTs
3695 Bugzilla : 5990, 6223
3696 Description: lfs getstripe would oops on a very large filesystem
3697 Details : lov_getconfig used kfree on vmalloc'd memory
3700 Frequency : only filesystems exporting via NFS to Solaris 10 clients
3701 Bugzilla : 6242, 6243
3702 Description: reading from files that had been truncated to a non-zero size
3703 but never opened returned no data
3704 Details : ll_file_read() reads zeros from no-object files to EOF
3709 Description: A bug in MDS/OSS recovery could cause the OSS to fail an assertion
3710 Details : There's little harm in aborting MDS/OSS recovery and letting it
3711 try again, so I removed the LASSERT and return an error instead.
3713 Severity : enhancement
3715 Description: New debugging infrastructure for tracking down data corruption
3716 Details : The I/O checksum code was replaced to: (a) control it at runtime,
3717 (b) cover more of the client-side code path, and (c) try to narrow
3718 down where problems occurred
3722 Bugzilla : 3819, 4364, 4397, 6313
3723 Description: Racing close and eviction MDS could cause assertion in mds_close
3724 Details : It was possible to get multiple mfd references during close and
3725 client eviction, leading to one thread referencing a freed mfd.
3727 Severity: : enhancement
3728 Bugzilla : 3262, 6359
3729 Description: Attempts to reconnect to servers are now more aggressive.
3730 Details : This builds on the enhanced upcall-less recovery that was added
3731 in 1.4.2. When trying to reconnect to servers, clients will
3732 now try each server in the failover group every 10 seconds. By
3733 default, clients would previously try one server every 25 seconds.
3738 Description: After recovery, certain operations trigger a failed
3739 assertion on a client.
3740 Details : Failing over an mds, using lconf -d --failover, while a
3741 client was doing a readdir() call would cause the client to
3742 LBUG after recovery completed and the readdir() was resent.
3744 Severity : enhancement
3746 Description: Default groups are now added by lconf
3747 Details : You can now run lconf --group <servicename> without having to
3748 manually add groups with lmc.
3751 Frequency : occasional
3753 Description: Nodes with an elan id of 0 trigger a failed assertion
3756 Frequency : always when accessing e.g. tty/console device nodes
3758 Description: tty and some other devices nodes cannot be used on lustre
3759 Details : file's private_data field is used by device data and lustre
3760 values in there got lost. New field was added to struct file to
3761 store fs-specific private data.
3764 Frequency : when exporting Lustre via NFS
3766 Description: NFSD failed occasionally when looking up a path component
3767 Details : NFSD is looking up ".." which was broken in ext3 directories
3768 that had grown large enough to become hashed.
3771 Frequency : Clusters with multiple interfaces not on the same subnet
3773 Description: Nodes will repeatedly try to reconnect to an interface which it
3774 cannot reach and report an error to the log.
3775 Details : Extra peer list entries will be created by lconf with some peers
3776 unreachable. lconf now validates the peer before adding it.
3779 Frequency : Only if a default stripe is set on the filesystem root.
3781 Description: Setting a default stripe on the filesystem root prevented the
3782 filesystem from being remounted.
3783 Details : The client was sending extra request flags in the root getattr
3784 request and did not allocate a reply buffer for the dir EA.
3787 Frequency : occasional, higher if lots of files are accessed by one client
3788 Bugzilla : 6159, 6097
3789 Description: Client trips assertion regarding lsm mismatch/magic
3790 Details : While revalidating inodes the VFS looks up inodes with ifind()
3791 and in rare cases can find an inode that is being freed.
3792 The ll_test_inode() code will free the lsm during ifind()
3793 when it finds an existing inode and then the VFS later attaches
3794 this free lsm to a new inode.
3798 Bugzilla : 6422, 7030
3799 Description: MDS deadlock between mkdir and client eviction
3800 Details : Creating a new file via mkdir or mknod (starting a transaction
3801 and getting the ns lock) can deadlock with client eviction
3802 (gets ns lock and trying to finish a synchronous transaction).
3805 Frequency : occasional
3806 Description: While starting a server, the fsfilt_ext3 module could not be
3808 Details : CFS's improved ext3 filesystem is named ldiskfs for 2.6
3809 kernels. Previously, lconf would still use the ext3 name
3810 when trying to load modules. Now, it will correctly use
3811 ext3 on 2.4 and ldiskfs on 2.6.
3813 Severity : enhancement
3814 Description: The default stripe count has been changed to 1
3815 Details : The interpretation of the default stripe count (0, to lfs
3816 or lmc) has been changed to mean striping across a single
3817 OST, rather than all available. For general usage we have
3818 found a stripe count of 1 or 2 works best.
3820 Severity : enhancement
3821 Description: Add support for compiling against Cray portals.
3822 Details : Conditional compiling for some areas that are different
3826 Frequency : occasional
3827 Bugzilla : 6409, 6834
3828 Description: Creating files with an explicit stripe count may lead to
3829 a failed assertion on the MDS
3830 Details : If some OSTs are full or unavailable, creating files may
3831 trigger a failed assertion on the MDS. Now, Lustre will
3832 try to use other servers or return an error to the
3836 Frequency : occasional
3838 Description: Multiple concurrent overlapping read+write on multiple SMP nodes
3839 caused lock timeout during readahead (since 1.4.2).
3840 Details : Processes doing readahead might match a lock that hasn't been
3841 granted yet if there are overlapping and conflicting lock
3842 requests. The readahead process waits on ungranted lock
3843 (original lock is CBPENDING), while OST waits for that process
3844 to cancel CBPENDING read lock and eventually evicts client.
3846 Severity : enhancement
3848 Description: Initial enabling of flock support for clients
3849 Details : Implements fcntl advisory locking and file status functions.
3850 This feature is provided as an optional mount flag (default
3851 off), and is NOT CURRENTLY SUPPORTED. Not all types of record
3852 locking are implemented yet, and those that are are not guaranteed
3853 to be completely correct in production environments.
3854 mount -t lustre -o [flock|noflock] ...
3857 Frequency : occasional
3859 Description: OSTs running 2.4 kernels but with extents enabled might trip an
3860 assertion in the ext3 JBD (journaling) layer.
3861 Details : The b_committed_data struct is protected by the big kernel lock
3862 in 2.4 kernels, serializing journal_commit_transaction() and
3863 ext3_get_block_handle->ext3_new_block->find_next_usable_block()
3864 access to this struct. In 2.6 kernels there is finer grained
3865 locking to improve SMP performance of the JBD layer.
3869 Description: Changes the "SCSI I/O Stats" kernel patch to default to "enabled"
3874 Description: merge and cleanup kernel patches.
3877 -----------------------------------------------------------------------------
3879 2005-05-05 Cluster File Systems, Inc. <info@clusterfs.com>
3881 NOTE: Lustre 1.4.2 uses an incompatible network protocol than previous
3882 versions of Lustre. Please update all servers and clients to
3883 version 1.4.2 or later at the same time. You must also run
3884 "lconf --write-conf {config}.xml" on the MDS while it is stopped
3885 to update the configuration logs.
3887 - fix for HPUX NFS client breakage when NFS exporting Lustre (5781)
3888 - mdc_enqueue does not need max_mds_easize request buffer on send (5707)
3889 - swab llog records of type '0' so we get proper header size/idx (5861)
3890 - send llog cancel req to DLM cancel portal instead of cb portal (5515)
3891 - fix rename of one directory over another leaking an inode (5953)
3892 - avoid SetPageDirty on 2.6 (5981)
3893 - don't re-add just-being-destroyed locks to the waiting list (5653)
3894 - when creating new directories, inherit the parent's custom
3895 striping settings if present parent (3048)
3896 - flush buffers from cache before direct IO in 2.6 obdfilter (4982)
3897 - don't hold i_size_sem in ll_nopage() and ll_ap_refresh_count (6077)
3898 - don't hold client locks on temporary worklist from l_lru (5666)
3899 - handle IO errors in 2.6 obdfilter bio completion routine (6046)
3900 - automatically evict dead clients (5921)
3901 - Update file size properly in create+truncate+fstat case (6196)
3902 - Do not unhash mountpoint dentries, do not allow removal of
3904 - Avoid lock ordering deadlock issue with write/truncate (6203,5654)
3905 - reserve enough journal credits in fsfilt_start_log for setattr (4554)
3906 - ldlm_enqueue freed-export error path would always LBUG (6149,6184)
3907 - don't reference lr_lvb_data until after we hold lr_lvb_sem (6170)
3908 - don't overwrite last_rcvd if there is a *_client_add() error (6086)
3909 - Correctly handle reads of files with no objects (6243)
3910 - lctl recover will also mark a device active if deactivate used (5933)
3912 - by default create 1 inode per 4kB space on MDS, per 16kB on OSTs
3913 - allow --write-conf on an MDS with different nettype than client (5619)
3914 - don't write config llogs to MDS for mounts not from that MDS (5617)
3915 - lconf should create multiple TCP connections from a client (5201)
3916 - init scripts are now turned off by default; run chkconfig --on
3917 lustre and chkconfig --on lustrefs to use them
3918 - upcalls are no longer needed for clients to recover to failover
3920 - add --abort-recovery option to lconf to abort recovery on device
3922 - add support for an arbitrary number of OSTs (3026)
3923 - Quota support protocol changes.
3924 - forward compatibility changes to wire structs (6007)
3925 - rmmod NALs that might be loaded because of /etc/modules.conf (6133)
3926 - support for mountfsoptions and clientoptions to the Lustre LDAP (5873)
3927 - improved "lustre status" script
3928 - initialize blocksize for non-regular files (6062)
3929 - added --disable-server and --disable-client configure options (5782)
3930 - introduce a lookup cache for lconf to avoid repeated DB scans (6204)
3931 - Vanilla 2.4.29 support
3932 - increase maximum number of obd devices to 520 (6242)
3933 - remove the tcp-zero-copy patch from the suse-2.4 series (5902)
3934 - Quadrics Elan drivers are now included for the RHEL 3 2.4.21 and
3935 SLES 9 2.6.5 kernels
3936 - limit stripes per file to 160 (the maximum EA size) (6093)
3938 2005-03-22 Cluster File Systems, Inc. <info@clusterfs.com>
3941 - don't LASSERT in ll_release on NULL lld with NFS export (4655, 5760)
3942 - hold NS lock when calling handle_ast_error->del_waiting_lock (5746)
3943 - fix setattr mtime regression from lovcleanup merge (4829, 5669)
3944 - workaround for 2.6 crash in ll_unhash_aliases (5687, 5210)
3945 - small ext3 extents cleanups and fixes (5733)
3946 - improved mballoc code, several small races and bugs fixed (5733, 5638)
3947 - kernel version 43 - fix remove_suid bugs in both 2.4 and 2.6 (5695)
3948 - avoid needless client->OST connect, fix handle mismatch (5317)
3949 - fix DLM error path that led to out-of-sync client, long delays (5779)
3950 - support common vfs-enforced mount options (nodev,nosuid,noexec) (5637)
3951 - fix several locking issues related to i_size (5492,5624,5654,5672)
3952 - don't move pending lock onto export if it is already evicted (5683)
3953 - fix kernel oops when creating .foo in unlinked directory (5548)
3954 - fix deadlock in obdfilter statistics vs. object create (5811)
3955 - use time_{before,after} to avoid timer jiffies wrap (5882)
3956 - shutdown --force/--failover stability (3607,3651,4797,5203,4834)
3957 - Do not leak request if server was not able to process it (5154)
3958 - If mds_open unable to find parent dir, make that negative lookup(5154)
3959 - don't create new directories with extent-mapping (5909, 5936)
3961 - fix lustre/lustrefs init scripts for SuSE (patch from Scali, 5702)
3962 - don't hold the pinger_sem in ptlrpc_pinger_sending_on_import
3963 - change obd_increase_kms to obd_adjust_kms (up or down) (5654)
3964 - lconf, lmc search both /usr/lib and /usr/lib64 for Python libs (5800)
3965 - support for RHEL4 kernel on i686 (5773)
3966 - provide error messages when incompatible logs are encountered (5898)
3968 2005-02-18 Cluster File Systems, Inc. <info@clusterfs.com>
3969 * version 1.4.0.10 (1.4.1 release candidate 1)
3971 - don't keep a lock reference when lock is not granted (4238)
3972 - unsafe list practices (rarely) led to infinite eviction loop (4908)
3973 - add per-fs limit of Lustre pages in page cache, avoid OOM (4699)
3974 - drop import inflight refcount on signal_completed_replay error (5255)
3975 - unlock page after async write error during send (3677)
3976 - handle missing objects in filter_preprw_read properly (5265)
3977 - no transno return for symlink open, don't save no-trasno open (3440)
3978 - don't try to complete elan receive that already failed (4012)
3979 - free RPC server reply state on error (5406)
3980 - clean up thread from ptlrpc_start_thread() on error (5160)
3981 - readahead could read extra page into cache that wasn't ejected (5388)
3982 - prevent races in class_attach/setup/cleanup/detach (5260)
3983 - don't dereference de->d_inode after l_dput of de (5458)
3984 - use "int" for stripe value returned from lock_to_stripe (5544)
3985 - mballoc allocation and error-checking fixes in 2.6 (5504)
3986 - block device patches to fix I/O request sizes in 2.6 (5482)
3987 - look up hostnames for IB nals (5602)
3988 - 2.6 changed lock ordering of 2 semaphores, caused deadlock (5654)
3989 - don't start multiple acceptors for the same port (5277)
3990 - fix incorrect LASSERT in mds_getattr_name (5635)
3991 - export a proc file for general "ping" checking (5628)
3992 - fix "lfs check" to not block when the MDS is down (5628)
3994 - service request history (4965)
3995 - put {ll,lov,osc}_async_page structs in a single slab (4699)
3996 - create an "evict_client" /proc entry on OSTs, like the MDS has
3997 - fix mount usage message, return errors per mount(8) (5168)
3998 - change grep [] to grep "[]" in tests so they work in more UMLs
3999 - fix ppc64/x86_64 spec to use %{_libdir} instead of /usr/lib (5389)
4000 - remove ancient LOV_MAGIC_V0 EA support (5047)
4001 - add "disk I/Os in flight" and "I/O req time" stats in obdfilter
4002 - align r/w RPCs to PTLRPC_MAX_BRW_SIZE boundary for performance (3451)
4003 - allow readahead allocations to fail when low on memory (5383)
4004 - mmap locking landed again, after considerable improvement (2828)
4005 - add get_hostaddr() to lustreDB.py for LDAP support (5459)
4007 2004-11-23 Cluster File Systems, Inc. <info@clusterfs.com>
4010 - send OST transaction number in read/write reply to free req (4966)
4011 - don't ASSERT in ptl_send_rpc() if we run out of memory (5119)
4012 - lock /proc/sys/portals/routes internal state, avoiding oops (4827)
4013 - the watchdog thread now runs as interruptible (5246)
4014 - flock/lockf fixes (but it's still disabled, pending 5135)
4015 - don't use EXT3 constants in llite code (5094)
4016 - memory shortage at startup could cause assertion (5176)
4018 - reorganization of lov code
4019 - single portals codebase
4021 - add extents/mballoc support (5025)
4022 - direct I/O reads in the obdfilter (4048)
4023 - kernel patches from LNXI for 2.6 (bluesmoke, perfctr, mtd, kexec)
4025 tbd Cluster File Systems, Inc. <info@clusterfs.com>
4028 - send OST transaction number in read/write reply to free req (4966)
4029 - don't ASSERT in ptl_send_rpc() if we run out of memory (5119)
4030 - lock /proc/sys/portals/routes internal state, avoiding oops (4827)
4031 - the watchdog thread now runs as interruptible (5246)
4032 - handle missing objects in filter_preprw_read properly (5265)
4033 - unsafe list practices (rarely) led to infinite eviction loop (4908)
4034 - drop import inflight refcount on signal_completed_replay error (5255)
4035 - unlock page after async write error during send (3677)
4036 - return original error code on reconstructed replies (3761)
4037 - no transno return for symlink open, don't save no-trasno open (3440)
4039 - add pid to ldlm debugging output (4922)
4040 - bump the watchdog timeouts -- we can't handle 30sec yet
4041 - extra debugging for orphan dentry/inode bug (5259)
4043 2004-11-16 Cluster File Systems, Inc. <info@clusterfs.com>
4046 - fix TCP_NODELAY bug, which caused extreme perf regression (5134)
4047 - allocate qswnal tx descriptors singly to avoid fragmentation (4504)
4048 - don't LBUG on obdo_alloc() failure, use OBD_SLAB_ALLOC() (4800)
4049 - fix NULL dereference in /proc/sys/portals/routes (4827)
4050 - allow failed mdc_close() operations to be interrupted (4561)
4051 - stop precreate on OST before MDS would time out on it (4778)
4052 - don't send partial-page writes before EOF from client (4410)
4053 - discard client grant for sub-page writes on large-page clients (4520)
4054 - don't free dentries not owned by NFS code, check generation (4806)
4055 - fix lsm leak if mds_create_objects() fails (4801)
4056 - limit debug_daemon file size, always print CERROR messages (4789)
4057 - use transno after validating reply (3892)
4058 - process timed out requests if import state changes (3754)
4059 - update mtime on OST during writes, return in glimpse (4829)
4060 - add mkfsoptions to LDAP (4679)
4061 - use ->max_readahead method instead of zapping global ra (5039)
4062 - don't interrupt __l_wait_event() during strace
4064 - add software watchdogs to catch hung threads quickly (4941)
4065 - make lustrefs init script start after nfs is mounted
4066 - fix CWARN/ERROR duplication (4930)
4067 - return async write errors to application if possible (2248)
4068 - add /proc/sys/portal/memused (bytes allocated by PORTALS_ALLOC)
4069 - print NAL number in %x format (4645)
4070 - update barely-supported suse-2.4.21-171 series (4842)
4071 - support for sles 9 %post scripts
4072 - support for building 2.6 kernel-source packages
4073 - support for sles km_* packages
4075 2004-10-07 Cluster File Systems, Inc. <info@clusterfs.com>
4078 - ignore -ENOENT errors in osc_destroy (3639)
4079 - notify osc create thread that OSC is being cleaned up (4600)
4080 - add nettype argument for llmount in #5d in conf-sanity.sh (3936)
4081 - reconstruct ost_handle() like mds_handle() (4657)
4082 - create a new thread to do import eviction to avoid deadlock (3969)
4083 - let lconf resolve symlinked-to devices (4629)
4084 - don't unlink "objects" from directory with default EA (4554)
4085 - hold socknal file ref over connect in case target is down (4394)
4086 - allow more than 32000 subdirectories in a single directory (3244)
4087 - fix blocks count for O_DIRECT writes (3751)
4088 - OST returns ENOSPC from object create when no space left (4539)
4089 - don't send truncate RPC if file size isn't changing (4410)
4090 - limit OSC precreate to 1/2 of value OST considers bogus (4778)
4091 - bind to privileged port in socknal and tcpnal (3689)
4093 - rate limit CERROR/CWARN console message to avoid overload (4519)
4094 - GETFILEINFO dir ioctl returns LOV EA + MDS stat in 1 call (3327)
4095 - basic mmap support (3918)
4096 - kernel patch series update from b1_4 (4711)
4098 2004-09-16 Cluster File Systems, Inc. <info@clusterfs.com>
4101 - avoid crash during MDS cleanup with OST shut down (2775)
4102 - fix loi_list_lock/oig_lock inversion on interrupted IO (4136)
4103 - don't use bad inodes on the MDS (3744)
4104 - dynamic object preallocation to improve recovery speed (4236)
4105 - don't hold spinlock over lock dumping or change debug flags (4401)
4106 - don't zero obd_dev when it is force cleaned (3651)
4107 - print grants to console if they go negative (4431)
4108 - "lctl deactivate" will stop automatic recovery attempts (3406)
4109 - look for existing locks in ldlm_handle_enqueue() (3764)
4110 - don't resolve lock handle twice in recovery avoiding race (4401)
4111 - revalidate should check working dir is a directory (4134)
4113 - don't always mark "slow" obdfilter messages as errors (4418)
4115 2004-08-24 Cluster File Systems, Inc. <info@clusterfs.com>
4118 - don't close LustreDB during write_conf until it is done (3860)
4119 - fix typo in lconf for_each_profile (3821)
4120 - allow dumping logs from multiple threads at one time (3820)
4121 - don't allow multiple threads in OSC recovery (3812)
4122 - fix debug_size parameters (3864)
4123 - fix mds_postrecov to initialize import for llog ctxt (3121)
4124 - replace config semaphore with spinlock (3306)
4125 - be sure to send a reply for a CANCEL rpc with bad export (3863)
4126 - don't allow enqueue to complete on a destroyed export (3822)
4127 - down write_lock before checking llog header bitmap (3825)
4128 - recover from lock replay timeout (3764)
4129 - up llog sem before sending rpc (3652)
4130 - reduce ns lock hold times when setting kms (3267)
4131 - change a dlm LBUG to LASSERTF, to maybe learn something (4228)
4132 - fix NULL deref and obd_dev leak on setup error (3312)
4133 - replace some LBUG about llog ops with error handling (3841)
4134 - don't match INVALID dentries from d_lookup and spin (3784)
4135 - hold dcache_lock while marking dentries INVALID and hashing (4255)
4136 - fix invalid assertion in ptlrpc_set_wait (3880)
4138 - add libwrap support for the TCP acceptor (3996)
4139 - add /proc/sys/portals/routes for non-root route listing (3994)
4140 - allow setting MDS UUID in .xml (2580)
4141 - print the stack of a process that LBUGs (4228)
4143 2004-07-14 Cluster File Systems, Inc. <info@clusterfs.com>
4146 - don't cleanup request in ll_file_open() on failed MDS open (3430)
4147 - make sure to unset replay flag from failed open requests (3440)
4148 - if default stripe count is 0, use OST count for inode size (3636)
4149 - update parent mtime/ctime on client for create/unlink (2611)
4150 - drop dentry ref in ext3_add_link from open_connect_dentry (3266)
4151 - free recovery state on server during a forced cleanup (3571)
4152 - unregister_reply for resent reqs (3063)
4153 - loop back devices mounting and status check on 2.6 (3563)
4154 - fix resource-creation race that can provoke i_size == 0 (3513)
4155 - don't try to use bad inodes returned from MDS/OST fs lookup (3688)
4156 - more debugging for page-accounting assertion (3746)
4157 - return -ENOENT instead of asserting if ost getattr+unlink race (3558)
4158 - avoid deadlock after precreation failure (3758)
4159 - fix race and lock order deadlock in orphan handling (3450, 3750)
4160 - add validity checks when grabbing inodes from l_ast_data (3599)
4162 - add /proc/.../recovery_status to obdfilter (3428)
4163 - lightweight CDEBUG infrastructure, debug daemon (3668)
4164 - change default OSC RPC parameters to be better on small clusters
4165 - turn off OST read cache for files smaller than 32MB
4166 - install man pages and include them in rpms (3100)
4167 - add new init script for (un)mounting lustre filesystems (2593)
4168 - run chkconfig in %post for init scripts (3701)
4169 - drop scimac NAL (unmaintained)
4171 2004-06-17 Cluster File Systems, Inc. <info@clusterfs.com>
4174 - clean kiobufs before and after use (3485)
4175 - strip trailing '/'s before comparing paths with /proc/mounts (3486)
4176 - remove assertions to work around "in-flight rpcs" recovery bug (3063)
4177 - change init script to fail more clearly if not run as root (1528)
4178 - allow clients to reconnect during replay (1742)
4179 - fix ns_lock/i_sem lock ordering deadlock for kms update (3477)
4180 - don't do DNS lookups on NIDs too small for IP addresses (3442)
4181 - re-awaken ptlrpcd if new requests arrive during check_set (3554)
4182 - fix cond_resched (3554)
4183 - only evict unfinished clients after recovery (3515)
4184 - allow bulk resend, prevent data loss (3570)
4185 - dynamic ptlrpc request buffer allocation (2102)
4186 - don't allow unlinking open directory if it isn't empty (2904)
4187 - set MDS/OST threads to umask 0 to not clobber client modes (3359)
4188 - remove extraneous obd dereference causing LASSERT failure (3334)
4189 - don't use get_cycles() when creating temp. files on the mds (3156)
4190 - hold i_sem when setting i_size in ll_extent_lock() (3564)
4191 - handle EEXIST for set-stripe, set proper directory name (3336)
4193 - servers can dump a log evicting a client - lustre.dump_on_timeout=1
4194 - fix ksocknal_fmb_callback() error messages (2918)
4196 2004-05-27 Cluster File Systems, Inc. <info@clusterfs.com>
4199 - don't copy lvb into (possibly NULL) reply on error (2983)
4200 - don't deref dentry after dput, don't free lvb on error (2922)
4201 - use the kms to determine writeback rpc length (2947)
4202 - increment oti_logcookies when osc is inactive (2948)
4203 - update client's i_blocks count via lvb messages (2543)
4204 - handle intent open/close of special files properly (1557)
4205 - mount MDS with errors=remount-ro, like obdfilter (2009)
4206 - initialize lock handle to avoid ASSERT on error cleanup (3057)
4207 - don't use cancelling-locks' kms values (2947)
4208 - use highest lock extent for kms, not last one (2925)
4209 - don't dereference ERR_PTR() dentry in error handling path (3107)
4210 - fix thread race in portals_debug_dumplog() (3122)
4211 - create lprocfs device entries at setup instead of at attach (1519)
4212 - common AST error handler, don't evict client on completion race (3145)
4213 - zero nameidata in detach_mnt in 2.6 (3118)
4214 - verify d_inode after revalidate_special is valid in 2.6 (3116)
4215 - use lustre_put_super() to handle zconf unmounts in 2.6 (3064)
4216 - initialize RPC timeout timer earlier for 2.6 (3219)
4217 - don't dereference NULL reply buffer if mdc_close was never sent (2410)
4218 - print nal/nid for unknown nid (3258)
4219 - additional checks for oscc recovery before doing precreate (3284)
4220 - fix ll_extent_lock() error return code for 64-bit systems (3043)
4221 - don't crash in mdc_close for bad permissions on open (3285)
4222 - zero i_rdev for non-device files (3147)
4223 - clear page->private before handing to FS, better assertion (3119)
4224 - tune the read pipeline (3236)
4225 - fix incorrect decref of invalidated dentry (2350)
4226 - provide read-ahead stats and refine rpc in flight stats (3328)
4227 - don't hold journal transaction open across create RPC (3313)
4228 - update atime on MDS at close time (3265)
4229 - close LDAP connection when recovering to avoid server load (3315)
4230 - update iopen-2.6 patch with fixes from 2399,2517,2904 (3301)
4231 - don't leak open file on MDS after open resend (3325)
4232 - serialize filter_precreate and filter_destroy_precreated (3329)
4233 - loop device shouldn't call sync_dev() for nul device (3092)
4234 - clear page cache after eviction (2766)
4235 - resynchronize MDS->OST in background (2824)
4236 - refuse to mount the same filesystem twice on same mountpoint (3394)
4237 - allow llmount to create routes for mounting behind routers (3320)
4238 - push lock cancellation to blocking thread for glimpse ASTs (3409)
4239 - don't call osc_set_data_with_check() for TEST_LOCK matches (3159)
4240 - fix rare problem with rename on htree directories (3417)
4242 - allow default OST striping configuration per directory (1414)
4243 - fix compilation for qswnal for 2.6 kernels (3125)
4244 - increase maximum number of MDS request buffers for large systems
4245 - change liblustreapi to be useful for external progs like lfsck (3098)
4246 - increase local configuration timeout for slow disks (3353)
4247 - allow configuring ldlm AST timeout - lustre.ldlm_timeout=<seconds>
4249 2004-03-22 Cluster File Systems, Inc. <info@clusterfs.com>
4252 - fixes for glimpse AST timeouts / incorrectly 0-sized files (2818)
4253 - don't overwrite extent policy data in reply if lock was blocked (2901)
4254 - drop filter export grants atomically with removal from device (2663)
4255 - del obd_self_export from work_list in class_disconnect_exports (2908)
4256 - don't LBUG if MDS recovery times out during orphan cleanup (2530)
4257 - swab reply message in mdc_close, other PPC fixes (2464)
4258 - fix destroying of named logs (2325)
4259 - overwrite old logs when running lconf --write_conf (2264)
4260 - bump LLOG_CHUNKSIZE to 8k to allow for larger clusters (2306)
4261 - fix race in target_handle_connect (2898)
4262 - mds_reint_create() should take same inode create lock (2926)
4263 - correct journal credits calculated for CANCEL_UNLINK_LOG (2931)
4264 - don't close files for self_export to avoid uninitialized obd (2936)
4265 - allow MDS with the same name as client node (2939)
4266 - hold dentry reference for closed log files for unlink (2325)
4267 - reserve space for all logs during transactions (2059)
4268 - don't evict page beyond end of stripe extent (2925)
4269 - don't oops on a deleted current working directory (2399)
4270 - handle hard links to targets without a parent properly (2517)
4271 - don't dereference NULL lock when racing during eviction (2867)
4272 - don't grow lock extents when lots of conflicting locks (2919)
4274 2004-03-04 Cluster File Systems, Inc. <info@clusterfs.com>
4277 - account for cache space usage on clients to avoid data loss (974)
4278 - lfsck support in lustre kernel code (2349)
4279 - reduce journal credits needed for BRW writes (2370)
4280 - orphan handling to avoid losing space on client/server crashes
4281 - ptlrpcd can be blocked, stopping ALL progress (2477)
4282 - use lock value blocks to assist in proper KMS, faster stat (1021)
4283 - takes i_sem instead of DLM locks internally on obdfilter (2720)
4284 - recovery for initial connections (2355)
4285 - fixes for mds_cleanup_orphans (1934)
4286 - abort_recovery crashes MDS in b_eq (mds_unlink_orphan) (2584)
4287 - block all file creations until orphan recovery completes (1901)
4288 - client remove rq_connection from request struct (2423)
4289 - conf-sanity test_5, proper cleanup in umount log not availale (2640)
4290 - recovery timer race (2670)
4291 - mdc_close recovey bug (2532)
4292 - ptlrpc cleanup bug (2710)
4293 - mds timeout on local locks (2588)
4294 - namespace lock held during RPCs (2431)
4295 - handle interrupted sync write properly (2503)
4296 - don't try to handle a message that hasn't been replied to (2699)
4297 - client assert failure during cleanup after abort recovery (2701)
4298 - leak mdc device after failed mount (2712)
4299 - ptlrpc_check_set allows timedout requests to complete (2714)
4300 - wait for inflight reqs when ptlrpcd finishes (2710)
4301 - make sure unregistered services are removed from the srv_list
4302 - reset bulk XID's when resending them (caught by 1138 test)
4303 - unregister_bulk after timeout
4304 - fix lconf error (2694)
4305 - handle write after unfinished setstripe, stripe-only getstripe (2388)
4306 - readahead locks pages, leaves pending causing memory pressure (2673)
4307 - increase OST request buffers to 4096 on large machines (2729)
4308 - fix up permission of existing directories in simple_mkdir (2661)
4309 - init deleted item, add assertions ptlrpc_abort_inflight() (2725)
4310 - don't assign transno to errored transactions (2742)
4311 - don't delete objects on OST if given a bogus objid from MDS (2751)
4312 - handle large client PAGE_SIZE readdir on small PAGE_SIZE MDS (2777)
4313 - if rq_no_resend, then timeout request after recovery (2432)
4314 - fix MDS llog_logid record size, 64-bit array alignment (2733)
4315 - don't call usermode_helper from ptlrpcd, DEFAULT upcall (2773)
4316 - put magic in mount.lustre data, check for bad/NULL mount data (2529)
4317 - MDS recovery shouldn't delete objects that it has given out (2730)
4318 - if enqueue arrives after completion, don't clobber LVB (2819)
4319 - don't unlock pages twice when trigger_group_io returns error (2814)
4320 - don't deref NULL rq_repmsg if ldlm_handle_enqueue failed (2822)
4321 - don't write pages to disk if there was an error (1450)
4322 - don't ping imports that have recovery disabled (2676)
4323 - take buffered bytes into account when balancing socknal conn (2817)
4324 - hold a DLM lock over readdir always, use truncate_inode_pages (2706)
4325 - reconnect unlink llog connection after MDS reconnects to OST (2816)
4326 - remove little-endian swabbing of llog records (1987)
4327 - set/limit i_blksize to LL_MAX_BLKSIZE on client (2884)
4328 - retry reposting request buffers if they fail (1191)
4329 - grow extent at grant time to avoid granting a revoked lock (2809)
4330 - lock revoke doesn't evict page if covered by a second lock (2765)
4331 - disable VM readahead to avoid reading outside lock extents (2805)
4333 - return LL_SUPER_MAGIC from statfs for the filesystem type (1972)
4334 - updated kernel patches for hp-2.4.20 kernel (2681)
4336 2004-02-07 Cluster File Systems, Inc. <info@clusterfs.com>
4339 - fix truncated write corruption (2366)
4340 - fix for failed assertion in iopen_connect_dentry (1792,2517)
4342 - don't flag the ptlrpcd thread with PF_MEMALLOC (2636)
4343 - ensure len(uuid) < 37 in lmc (1171)
4344 - fix ia64 OOPS in llog_test (2255)
4345 - zero end of page at obdfilter for partial page writes (2648)
4346 - don't leave stale dentries around after renames (bug 2428)
4347 - fix timeouts when evicting a client with a single lock held (2642)
4348 - set deadline for the initial HELLO message to drain (2634)
4349 - print out dotted-quad IP addresses in the socknal (2302)
4351 - additional debugging for MDS client eviction problem (2443)
4352 - fix mkfsoptions support for osts (2603, 2604)
4354 2004-01-27 Cluster File Systems, Inc. <info@clusterfs.com>
4357 - add series for the vanilla 2.6.0 kernel
4358 - add series for the vanilla 2.4.24 kernel
4359 - add series for a cray x86/64 UL kernel drop
4360 - fix xattr patches for the vanilla 2.4.19 series
4362 - generate true UUIDs in lmc (1171)
4363 - have portals stack dumping break in UML (2466)
4364 - avoid bad dchild deref; avoid inum lock w/o creation (2362)
4365 - allocate with _NOFS in ldlm to avoid deadlock (1933)
4366 - wake callback waiting threads on client eviction (2460)
4367 - Add --ptldebug and --subsystem to lmc (1719)
4368 - update assertion to allow safe interrupt allocation
4369 - set rq_no_resend for cancel requests (2432)
4370 - recalculate ptlrpcd timeout after resend (2494)
4371 - call vfs_rmdir when removing pending directories (2368)
4372 - fix renaming a file to itself (2429)
4373 - lmc creates a default one-stripe lov (2454)
4374 - expand procfs space to handle large clusters (2326)
4375 - increase UML stack to avoid overflow
4376 - update lconf's list of debug and subsystem masks
4377 - fix lfs find --obd (2510)
4378 - /proc tunable for disabling filter read caching (2591)
4379 - stop rpm packages from altering slapd.conf (2301)
4380 - disable nagle in the socknal under 0conf (2578)
4381 - choose mds inode size based on stripe count (2572)
4382 - fix kernel-source rpm problems (2516)
4384 - add --disable-doc to avoid pdf generation (2421)
4385 - update documentation, tests, type-os, comments
4386 - avoid format warnings on ia64
4387 - remove the TOE NAL
4388 - tiny code cleanups by removing unused fields
4390 2004-01-07 Cluster File Systems, Inc. <info@clusterfs.com>
4393 - fix obvious semaphore misuse in as-yet-unused setattr path (2348)
4394 - remove the most blatant lies from BUILDING file (2371)
4395 - change default debug level to reasonable production setting
4396 - reduce client side cache size to reduce cache flush time
4397 - reduce max RPCs in flight to avoid unnecessary file fragmentation
4398 - make TCP zerocopy and pinger support enabled by default (2476)
4399 - sync writes completed after process exits caused crashes (2319)
4400 - maintain correct mount count on the MDS (2356)
4401 - backout 1557, because 2316 wasn't really fixed
4402 - better file I/O statistics gathering in /proc
4403 - don't take unnecessary, deadlock-inducing bug in readpage (2383)
4404 - another kernel patch to fix zero-copy TCP function export
4405 - don't take duplicate lock when processing re-sent getattr (2420)
4406 - lctl uses obd_self_export instead of creating new conn (2353)
4407 - MDS/OST recovery case which requires object creation asserted (2425)
4408 - move lfs from /usr/sbin to /usr/bin in packages
4409 - fix race between mds_client_add and mds_client_free (2417)
4410 - use kmalloc instead of slabs in portals (2430)
4411 - don't create duplicate records when a failover MDS is present (2442)
4412 - remove unnecessary mount age check (2332)
4413 - don't remove directory inodes from locks prematurely (2451)
4414 - don't break if MDS service name is the same as hostname (2103)
4415 - fix races in client write RPC generation when cache full (2482)
4417 2003-12-13 Cluster File Systems, Inc. <info@clusterfs.com>
4420 - remove now-unused request->rq_obd (278)
4421 - if an allocation fails, print out how much memory we've used (1933)
4422 - use PORTAL_SLAB_ALLOC for structures, to get GFP_MEMALLOC (1933)
4423 - add the "configurable stack size" patch to most series files (1256)
4424 - ability to write large log records, for 100+ OST configs (2306)
4425 - fix NULL deref when filter_prep fails (2314)
4426 - fix operator precedence error in filter_sync
4427 - dynamic allocation of socknal TX descriptors (2315)
4428 - fix a missed case in the GFP_MEMALLOC patch, can cause deadlock (2310)
4429 - fix gcc 2.96 compilation problem in xattr kernel patch (2294)
4430 - ensure that CWARN messages in Portals always get to the syslog
4431 - __init/__exit are not for prototype decls (ldlm_init/exit)
4432 - x86-64 compile warning fixes
4433 - fix gateway LMC keyword conflict (2318)
4434 - fix MDS lock inversions in getattr/reint paths (1844)
4435 - fix a rare lock re-ordering bug, which caused deadlock (2322)
4436 - fix i_sem/journal inversion in fsfilt_ext3_write_record (2306)
4437 - DLM race condition prevented some lock evictions (2328)
4438 - ENOMEM detection and retry on socknal sends (2230)
4439 - use GFP_NOFS throughout Lustre, to combat ENOMEM (2230)
4440 - move osc_rpcd into ptlrpc, for use in MDC and others (2329)
4441 - protect MDS inode fsdata with stronger locking; fixes assertion (2313)
4442 - better error messages when a client is rejected during recovery (1505)
4443 - avoid cancelling locks which were never granted, after failure (2330)
4444 - fix i_sem/journal inversion in mds_client_add (2333)
4445 - fix truncate/getattr lock cycle deadlock (2334)
4446 - use rpcd to send close; allows resend after timeout, avoid leak (1897)
4447 - fix two rare exit paths which could leak an l_lock() ref (2321)
4448 - fencepost error in MDS/OST orphan recovery (2226)
4449 - make log record alignment 8 bytes (1988)
4450 - lstripe now fails when requested offset > ost_count (2237)
4451 - ensure that all kernel series have a complete list.h (1607)
4452 - fix crashes in special-file operations (2316)
4453 - lctl create/brw OID mismatch, caused by obsolete filter loop (2339)
4455 - allow configurable automake binary, for testing new versions
4456 - small update to the lfs documentation
4458 2003-12-03 Cluster File Systems, Inc. <info@clusterfs.com>
4460 * fix negative export reference count in fsfilt_sync (2312)
4462 2003-12-01 Cluster File Systems, Inc. <info@clusterfs.com>
4463 * release candidate 0.9.1
4465 - orphans are moved into the PENDING directory for possible recovery
4466 - replayed opens now open by fid for orphan/rename safety (1042)
4467 - last close of an orphan inode generates a transno (683)
4468 - chdir() and mount() now pin the directory entry (1020)
4469 - avoid CERROR in normal ll_setattr_raw() error case (1500)
4470 - discard very old requests without processing them (1502)
4471 - remove some common, well-understood CERRORs (1505)
4472 - require O_DIRECT I/O to be page-sized to workaround IA64 crash (1609)
4473 - clear "grant" flags in OST replies until OST grant code lands (1644)
4474 - fix read performance by not clobbering i_blksize on client (1598)
4475 - fix __ldlm_handle2lock oops by not dereferencing lock after PUT (1625)
4476 - make LRU size a /proc tunable, clears locks when reduced (707)
4477 - fix some lprocfs rot that prevented ptlbd from loading (1732)
4478 - server locks take references on exports now (1558)
4479 - build fixes for 2.4.20-rh trees (1663)
4480 - return an error from lov_create if all OSCs are inactive (1751)
4481 - fix import levels when a reconnect happens without a timeout (1597)
4482 - exit early from mds_open if we get a lookup error (1749)
4483 - partial page read at EOF wouldn't wait for disk before sending (1642)
4484 - avoid NULL deref in obdfilter when reading page past EOF (1592)
4485 - avoid LASSERT in ll_intent_lock if server failed very early (1090)
4486 - fix LBUG in ll_it_open_error with rc = -2 (1861)
4487 - write/truncate lock inversion (1639)
4488 - Don't auto-load obdclass, portals modules during cleanup (1495)
4489 - fix timestamps from jumping to "now" (1763)
4490 - extra journal assertions (1648)
4491 - add an extra multiunlink test (1771)
4492 - fix read_record/write_record API (1776)
4493 - fix leak of offset_extent, possible incorrect i_size later (1772)
4494 - fix lasserts in mis-matched transnos during open-unlink testing (1541)
4495 - Debugging for the kqswnal_get_idle_tx problems (1820)
4496 - Allow recovery to be attempted multiple times (1536)
4497 - Write out MDS last_rcvd file after it is first created (1600)
4498 - Fix tx_descriptor leak in failed transmit situations (1827)
4499 - ext3 journaling fixes for assertion failure after IO error (1871)
4500 - class_export_put() on freed export after completion AST error (1896)
4501 - Fix revalidate looping in VFS (1322)
4502 - Don't access a freed export during MDS_REINT timeout (1521)
4503 - Add open-unlink recovery support on the MDS (1673,1764)
4504 - Return an error if no MDS data was read from last_rcvd (1946)
4505 - Fix for lookup "." or ".." crash on error (1932,1931,1935)
4506 - Don't setup a disk device that doesn't match exported UUID (317)
4507 - Reduce bulk RPC timeout to avoid cascading client/OST failures (1845)
4508 - avoid committing NULL handle in force close
4509 - local.sh is now a one-stripe LOV configuration
4510 - POSIX utime.4 -EPERM on FIFO not owned by user (56)
4511 - fix ext3 htree duplicate directory entry corruption (1516)
4512 - POSIX creat.13, fstat.1, open.18, stat.3 new file atime/mtime (2020)
4513 - update to new LOV EA format (2097)
4514 - interoperability for different PAGE_SIZE/wordsize (686,1821,1343,2042)
4516 2003-06-15 Phil Schwan <phil@clusterfs.com>
4519 - imports and exports cleanup too early, need refcounts (349, 879, 1045)
4520 - per-import/export recovery handling (958, 931, 959)
4521 - multiple last-rcvd slots, for serving multiple FSes (949)
4522 - connections are again shared between multiple imp/exports (963, 964)
4523 - "umount -f" would hang if any requests needed to be sent (393, 978)
4524 - avoid pinning large req buffer by copying for queued messages (989)
4525 - add "uuid" to "lctl device" command to help upcalls (991)
4526 - "open" RPCs with transnos would confuse recovery counters (1037)
4527 - do proper endian conversion of all wire messages (288, 340, 891)
4528 - remove OST bulk get LBUGs, fix ost_brw_write cleanup (1126)
4529 - call waiting locks callback from LDLM recovery thread (1127, 1151)
4530 - fix ptlrpc_connection leak in target_handle_connect (1174)
4531 - fix import refcounting bug in OST and MDS cleanup (1134)
4532 - if an invalid-at-open-time OSC returned before close(), LBUG (1150)
4533 - fix very unlikely obd_types race condition (501)
4534 - remove osc_open hack for echo_client (1187)
4535 - we leaked exports/dlmimps for forcibly disconnected clients (1143)
4536 - a failure in read_inode2 leads to deadlock (1139)
4537 - cancel ack-locks as soon as transaction is committed (1072)
4538 - fix major leaks and crashes in the bulk I/O path (937, 1057)
4539 - make sure to commitrw after any preprw to avoid deadlock (1162)
4540 - failing to execute a file in a lustre FS would lock inode (1203)
4541 - small DEBUG_REQ fix to avoid dereferencing a NULL (1227)
4542 - don't ASSERT while cleaning up an incompletely-setup obd (1248)
4543 - obd_uuid2tgt would walk off the end of the list (1255)
4544 - on IA64 the osc would give portals incorrect bulk size (1258)
4545 - fix debug daemon ioctl interface; allows daemon on ia64 (1274)
4546 - fix lock inversion caused by new llite matching code (1282)
4547 - limit the number of dirty pages on a client to 10MB (1286)
4548 - timed out locks were not being corrected cancelled (1289)
4549 - fix O_DIRECT above 4GB on IA-32 (1292)
4550 * major user-visible changes
4551 - fail out/fail over policy now controlled by the upcall (993)
4553 - add OBD_PING to check server availability and failure (954)
4554 - lustre messages are now sent in sending host order (288, 340, 891)
4555 - add eadatalen to MDS getattr reply (340)
4556 - OST read replies may contain second buffer, with per-page status (593)
4558 2003-03-11 Phil Schwan <phil@clusterfs.com>
4561 - LDLM_DEBUG macro fix, for gcc 3.2 (850)
4562 - failed open()s could cause deadlock; fixed (867, 869)
4563 - stop cancelling OST locks when files are closed (481)
4564 - overlapping XID spaces caused network corruption (851, 853)
4565 - fix unsafe fsfilt counter arithmetic; change to atomic_t
4566 - setattr_raw added, to do single-RPC, server-side setattrs
4567 - lmc/lconf syntax change for OST UUIDs
4568 - fix crashy race condition between ptlrpc_free_req and osc_close
4569 - don't use request in mdc_enqueue if we hit a timeout (889)
4570 - don't set the inode i_size for regular files from the MDS (896)
4571 - handle out of order completion AST (842)
4572 - don't LBUG if a lock request times out after receiving AST (913)
4573 - avoid d_rehash race in ll_find_alias by rehashing inside dcache_lock
4574 - if a bad lock AST arrives, send an error instead of dropping entirely
4575 - return 0 from revalidate2 if ll_intent_lock returns -EINTR (912)
4576 - fix leak in bulk IO when only partially completed (899, 900, 926)
4577 - fix O_DIRECT for ia64 (55)
4578 - (almost) eliminate Lustre-kernel-thread effects on load average (722)
4579 - C-z after timeout could hang a process forever; fixed (977)
4581 - client-side I/O cache (678, 924, 929, 941, 970)
4583 - READPAGE and SETATTRs which don't take server-side locks get
4586 2003-02-11 Phil Schwan <phil@clusterfs.com>
4589 - Fix ldlm_lock_match on the MDS to avoid matching remote locks (592)
4590 - Fix fsfilt_extN_readpage() to read a full page of directory
4591 entries, or fake the remainder if PAGE_SIZE != blocksize (500)
4592 - Avoid extra mdc_getattr() in ll_intent_lock when possible (534, 604)
4593 - Fix imbalanced LOV object allocation and out-of-bound access (469)
4594 - Most intent operations were removed, in favour of a new RPC mode
4595 that does a single RPC to the server and bypasses most of the VFS
4596 - All LDLM resource ID arrays were removed in favour of ldlm_res_id
4597 - Aggressively cancel local locks on DLM servers
4598 - mds_reint_unlink sends EA to the client if it's the last nlink.
4599 client uses that EA to unlink OST objects.
4600 - mds_reint_{rename,unlink,link} were rewritten to take ordered locks
4601 - recursive symlinks were fixed (439)
4602 - fixed NULL deref in DEBUG_REQ
4603 - filter_update_lastobjid no longer calls sync, which annoyed extN
4604 - fixed multi-client small-writes to a single file problem (445)
4605 - fixed mtime updates during file writes (607)
4606 - fixed vector writes on obdfilter causing problems when ENOSPC (670)
4607 - fixed bug in obd_brw_read/write() (under guise of testing 367)
4608 - fixed Linux OST size reporting problem (444, 656)
4609 - OST now updates object mtime with writes or setattr (607, 619)
4610 - client verifies file size before zeroing page past EOF (445)
4611 - OST now writes last allocated objid to disk with allocation (108)
4612 - LOV on echo now works (409)
4614 - mds_reint_unlink sends a new buffer, with the EA included. this
4615 buffer is only valid if body->valid & OBD_MD_FLEASIZE, which is only
4616 set if a regular file was being unlinked, and it was the last link
4617 - use PtlGet from the target for bulk writes (315)
4618 - OST now updates object mtime with writes or setattr (607, 619)
4619 - LDLM now has a grant-time callback to revalidate locked items, if
4621 - Many MDS operations were reorganized to combat race conditions
4623 - Merge b_intel branch (updated lprocfs code) - now at /proc/fs/lustre
4624 - configure check to avoid gcc version 2.96 20000731-2.96-98) (606)
4626 2003-01-06 Andreas Dilger <adilger@clusterfs.com>
4629 - Fully reactivate OST imports after reconnection (512, others)
4630 - Make sure client sees our -ENOTCONN from mds_handle (513 - partial)
4631 - More graceful error handling for truncating on dead OST (515)
4632 - Don't error out unless we're actually accessing dead stripes (474)
4633 - Fix garbage sizes when stripes are missing (410)
4634 - LRU counters were broken, causing constant lock purge (433, 432)
4635 - garbage on read from stripes with failed OSTs (441)
4636 - mark OSCs as active before reconnecting during recovery (438)
4637 - lov_enqueue and lov_cancel need to handle inactive OSTs (403)
4638 - lfind did not preserve OST order in output (443)
4639 - symlinks cause hung clients, incorrect data (439)
4640 - stop dereferencing request after dropping refcount (457)
4641 - don't LASSERT(spin_is_locked) on non-SMP (455)
4642 - fixes for many rename() bugs
4643 - fstat didn't correctly synchronize attributes (399)
4644 - server must handle lock cancellation during blocking AST prep (487)
4645 - bulk descriptors were free()d too soon (511)
4646 - fix paths in lconf, which would load incorrect modules (451, 507)
4647 - fix confusing lconf 'host not found' error message (386)
4648 - fix lock order deadlock on OST (O/R i_sem before journal ops, 478)
4649 - fix race condition in mdc_blocking_ast() for inode access (526)
4650 - fix lov_unpackmd() unpacking wrong number of stripes (537)
4651 - fix lov_set_osc_active() marking wrong OSC inactive (440)
4652 - fix bad lstripe lov_unpackmd() assertion (fix layering too) (527)
4653 - fix multiple writes of stripe MD to MDS (358, maybe 519)
4654 - fix lstripe in several ways (kernel side) (527)
4655 - fix request leak in ldlm_cli_enqueue (262)
4656 - incorrect OSC was marked inactive after OST failure
4657 - call mds_fs_cleanup before unmounting filesystem (524)
4658 - fix races between taking ns_lock and ldlm_lock_change_resource
4659 - fix races updating LOV export open file list
4660 - fix lov_enqueue error path, avoid decref-ing bad lock handle
4661 - fix recovery NULL deref in ldlm_cli_cancel_unused
4662 - fix some DLM races by using new hash table for lock handles (419)
4663 - permit the client to specify desired inodes, at replay
4664 - duplicate requests when we queue them for replay reintegration
4665 - fix last_rcvd offset calculation
4666 - sync after each recovered transaction, so we always make progress
4667 - never, not always, ERESTART requests without transnos
4668 - store the lov_desc in the MDS, so we don't depend on getlovinfo to
4670 - skip replay if the MDS says that the client is already connected
4671 - don't check for a recovery-enabled export to match lctl's UUID
4672 - don't INC_USE_COUNT for phantom exports
4673 - don't crash when cleaning up phantom exports (567)
4674 - don't double-finish or set replay data for errored mdc_open requests
4675 - abort requests when they time out, so we don't get old replies
4676 - send/receive replies for AST messages again
4677 - if the client says that it doesn't have the lock, cancel it on the
4679 - if we timeout during I/O, don't try to cancel an in-use lock; instead
4680 mark it as destroyed, it will all work out when decref is called
4681 - fix module use counts (22, 581)
4683 - ASTs now expect a reply (server cancels lock on error reply)
4685 2002-12-02 Andreas Dilger <adilger@clusterfs.com>
4688 - fix many simultaneous client startup (392)
4689 - fix dentry->d_it clobbering
4690 - credentials weren't being shipped for readdir/getattr operations
4691 - remove invalid assertions triggered during some concurrent MD
4693 - proper Lustre versions added (336, 389)
4694 - fix memory leak for create error case (398)
4695 - fix LOV locking bug that would get cli/srv out of sync
4696 - fix echo client over LOV (409)
4697 - fix dbench 2, extN refcount problem (170, 258, 356, 418)
4698 - fix double-O_EXCL intent crash (424)
4699 - avoid sending multiple lock CANCELs (352)
4701 - MDS can do multi-client recovery (modulo bugs in new code)
4703 - many updates, edits, cleanups
4705 2002-11-18 Phil Schwan <phil@clusterfs.com>
4708 - fix null d_it dereference (346)
4709 - fix full OST/dbench hang (333)
4710 - fix permission problem with file removal (286)
4711 - fix removal of OSCs from LOV when they fail
4712 - fix NULL deref during bulk timeout (214)
4713 - fix problems related to multiple filesystems on one MDS (241)
4714 - fixed serious subtle metadata locking bugs
4715 - free locks on clients when inodes are removed due to memory
4717 - fix inode pointer in lock data (285)
4718 - partial support for multiple MDS on a single host (241)
4719 - data locks weren't cancelled at clear_inode time (290, 311)
4720 - intent locks could lead to unbounded lock growth (205)
4721 - added a maximum lock count, an LRU list, and a flusher
4722 - fix multiple rename (365)
4723 - properly abstracted the echo client
4724 - OSC locked 1 byte too many; fixed
4725 - rewrote brw callback code:
4726 - fixed recovery bugs related to LOVs (306)
4727 - fixed too-many-pages-in-one-write crash (191)
4728 - fixed (again) crash in sync_io_timeout (214)
4729 - probably fixed callback-related race (385)
4731 - Add capability to MDS protocol
4732 - LDLM cancellations and callbacks on different portals
4734 2002-10-28 Andreas Dilger <adilger@clusterfs.com>
4737 - limit client IOV size to PTL_MD_MAX_IOV (611336, 191)
4738 - defer open object destruction to close time (601981, 138)
4739 - open/close OST file handle in obdo (OBD_MD_FLHANDLE) (601981, 138)
4740 - move LDLM_ENQUEUE/CONVERT back to MDS portal (625069)
4741 - abstract ll_lookup2, fix ll_revalidate2 to use abstraction (256)
4742 - don't call obd_setattr in ll_file_release for destroyed objects
4743 * protocol change to lustre_msg: move |version| and add |flags|
4744 * protocol change to osc_punch: "start" in "o_size", "end" in "o_blocks"
4745 * lock replay: for LDLM_FL_REPLAY trust client to do right thing
4746 * added replay of create, unlink, link and rename operations during
4747 MDS failover; recovery should be much more robust now
4748 * remove failed OSCs from LOVs (only lov_create uses this so far)
4749 * the lustre-HOWTO was brought (more) up to date (582544)
4751 2002-10-23 Phil Schwan <phil@clusterfs.com>
4754 - in-use dentries weren't being reused properly (617851)
4755 - prevent multiple LDLM setup (599178)
4756 - fix LOV size calculations for truncate (617853)
4757 - fix client handling of MDS intent errors (POSIX)
4758 - fix permission bug in lovstripe.c test (624321)
4759 - fix MDS thread deadlock - move LDLM handler to DLM portal (625069)
4760 - truncate past end of file could corrupt data
4761 - proper cleanup after timeouts, crashes, etc (592524, 550815)
4762 - a race in recovery could return ETIMEDOUT to apps (623947)
4763 - building outside the source directory was fixed
4764 * the lustre-HOWTO was brought (more) up to date (582544)
4765 * major progress was made on recovery functionality
4767 2002-10-10 Phil Schwan <phil@clusterfs.com>
4770 - recovery deadlock fix
4771 - rm -rf causes LBUG fix (617817)
4772 - file open by multiple tasks fix (618962)
4773 - directory permissions bugs (602707 and 620007)
4774 - journal_stop fixed with locking (611313)
4775 - O_APPEND failures resolved (618273, perhaps 614459)
4776 - lconf PATH fix (619770)
4777 - IA64 build fix (621450)
4778 - RPC buffer sizes scale with amount of memory
4780 2002-10-01 Phil Schwan <phil@clusterfs.com>
4783 - locks would be cancelled without throwing away data pages,
4784 resulting in inconsistent data (605627)
4785 - inode attributes were not always being refreshed (605627, 612449)
4786 - lconf now continues to cleanup after lctl reports an error
4787 - MDS now enforces user permissions (602707)
4788 - lprocfs cleanup fixed, but not yet enabled (614157)
4789 - fixed infinite server hang, should a client not respond to an AST
4790 - avoid going into recovery if user calls readlink() with a buffer
4791 that's too small (613941)
4792 - AST RPCs no longer require replies (614867) -- this may be changed
4793 - don't crash server if client sends an IOV that's too big (611336)
4794 - fixed lock conversion deadlock (611892)
4795 - fixed the following of symlinks (614622)
4796 * recovery: the server can remove locks from a client that dies, other
4797 clients can make progress
4798 * more extN patch fixes
4799 * compile-time configurable ptlrpc buffer allocations
4801 - collaborative read cache document
4802 - Lustre Lite Performance CDR document-in-progress
4804 2002-09-20 Andreas Dilger <adilger@clusterfs.com>
4807 - fix typo in patch-2.4.18
4809 2002-09-20 Andreas Dilger <adilger@clusterfs.com>
4812 - clear ptlrpc request each time in handle_incoming_request()
4813 - unlink of files now destroys the object on the OST
4815 2002-09-19 Peter Braam <braam@clusterfs.com>
4817 * add hard link support
4818 * change obdfile creation method
4819 * kernel patch changed
4821 2002-09-19 Peter Braam <braam@clusterfs.com>
4824 - stack overflow bug in extN fixed
4826 2002-09-18 Andreas Dilger <adilger@clusterfs.com>
4828 * documentation updates
4829 - add man pages for config tools
4830 - update tests/README to describe testing with new config tools
4831 - finish metadata API descriptions
4832 * bug fixes and cleanups
4833 - statfs workaround for 16TB limit
4834 - LOV stripe allocation improved, can stripe on subset of OSTs
4835 - LOV file size/IO offset was wrong for files > 4GB in size
4836 - object EA data was being dropped, caused files to be unreadable
4837 - memory overflow with non-LOV OST caused memory corruption
4838 - fixed regression tests to work with new config tools, obdfilter
4839 - fixed bug when directory size became larger than 1 block
4840 - fixed bug (for single client case) when PWD was deleted
4841 - invalidate local directory pages when doing intent-based ops
4842 - avoid LDLM oops when lock callback contained bad data
4844 2002-09-09 Andreas Dilger <adilger@clusterfs.com>
4846 * documentation updates
4847 * bug fixes and cleanups
4848 - configuration tools
4851 - 64-bit compile warnings
4852 - 64-bit internal statfs data
4854 * test_brw on persistent OST devices
4856 * lprocfs (disabled)
4858 2002-09-04 Andreas Dilger <adilger@clusterfs.com>
4860 * documentation updates
4861 * bug fixes and cleanups
4862 * configuration tools
4864 2002-08-30 Peter J. Braam <braam@clusterfs.com>
4867 * many small fixes to 0_5_4
4868 * io/network handling
4869 * thinkos in MDS operations
4871 2002-08-24 Peter J. Braam <braam@clusterfs.com>
4874 * crucial basic fixes to 0.5.3
4875 * IOR, Iozone work over Elan
4878 2002-08-07 Phil Schwan <phil@clusterfs.com>
4879 * version 0_5_3, our first alpha
4880 * we use the new Portals iovs
4881 * documentation updates
4882 * bug fixes and cleanups
4883 * small changes in the DLM wire protocol
4885 2002-07-25 Peter J. Braam <braam@clusterfs.com>
4886 * version 0_5_1 with some initial stability,
4887 * locking on MD and file I/O.
4888 * documentation updates
4889 * several bug fixes since 0.5.0
4890 * small changes in wire protocol
4892 2002-07-18 Phil Schwan <phil@clusterfs.com>
4894 * delivered as Lustre Light Alpha
4895 * fixed a crash after handling invalid MDS requests
4896 * fixed directory pages for architectures with non-4k pages sizes
4898 2002-07-11 Andreas Dilger <adilger@clusterfs.com>
4899 * release version v0_4_4
4900 * Moves TCP acceptor to be on port 2432 (unused Coda port) instead
4902 * Fixes a number of interruption problems with OST operations.
4903 * Update documentation for portals header changes
4904 * Move all wire protocol structs/defines to lustre_idl.h
4905 * Fixes symlink length bug.
4906 * Add tcpdump to repository.
4908 2002-07-05 Andreas Dilger <adilger@clusterfs.com>
4909 * release version v0_4_3
4910 * Fixes statfs for inodes on extN.
4911 * Fixes bug in runtests which would delete /etc/hosts.
4912 * Use 64-bit object IDs wherever possible (not into VFS though)
4913 Remove ost_get_info, which is unused by lustre, and out of date.
4915 2002-07-03 Peter Braam <braam@clusterfs.com>
4916 * release version v0_4_2 Fixes a lookup error (type not passed)
4917 * move forward to head of Portals
4918 * move forward to latest Lustre kernel
4920 2002-06-25 Peter Braam <braam@clusterfs.com>
4921 * release version v0_4_1. Hopefully stable on single node use.