1 tbd Sun Microsystems, Inc.
3 * Server support for kernels:
4 2.6.18-164.6.1.el5 (RHEL 5)
5 2.6.18-164.6.1.0.1.el5 (OEL 5)
6 * Client support for unpatched kernels:
7 (see http://wiki.lustre.org/index.php?title=Patchless_Client)
8 2.6.18-164.6.1.el5 (RHEL 5),
9 2.6.18-164.6.1.0.1.el5 (OEL 5)
10 2.6.16.60-0.42.8 (SLES 10),
12 * Recommended e2fsprogs version: 1.41.6.sun1
13 * Note that reiserfs quotas are disabled on SLES 10 in this kernel.
17 Description: Add cascading_rw to lustre mpi tests.
21 Description: Store SOM data in EA.
22 Details : Also several SOM related cleanups.
26 Description: Add refcount to md_open_data
30 Description: Use refcount on lov_request_set to prevent memory corruption.
34 Description: Statahead: use parent dir's i_mutex for synchronization.
38 Description: loadgen improvements.
42 Description: Enable peer health detection in ksocklnd and ko2iblnd.
46 Description: Control DCACHE_LUSTRE_INVALID flag with MDS_INODE_LOOKCUP lock
50 Description: Fix race on obd_devcie:md_stats
54 Description: Fix SLES 11 client builds.
55 Details : Resolved uninitalized pointer gcc warnings.
59 Description: Allow non-root access for "lfs check".
60 Details : Added a check in obd_class_ioctl() for OBD_IOC_PING_TARGET.
64 Description: Clear imp_force_reconnect correctly in ptlrpc_connect_interpret()
66 Severity : enhancement
68 Description: Update kernel to RHEL5.4 2.6.18-164.6.1.el5 and
69 OEL5 2.6.18-164.6.1.0.1.el5(Both in-kernel OFED enabled).
73 Description: Sanity test_27p fails.
74 Details : OBD_FAIL_OST_ENOSPC has been moved to filter_statfs().
75 Sanity tests 27 were cleaned up and improved.
79 Description: Unify req format on client/servers
80 Details : Use new req_capsule API [almost] everywhere instead of old PTLRPC
81 buffers and swabbers approach..
86 Description: drop join file stuff.
88 Severity : enhancement
90 Description: Add 2.6.27 and SLES11 (patchless client) support
94 Description: Fix in ptlrpc_expire_one_request() to print the signed time
97 Severity : enhancement
99 Description: Build kernels (RHEL5, OEL5 and SLES10/11) using the vendor's own
102 Severity : enhancement
104 Description: Remove set_info(KEY_UNLINKED) from MDS/OSC
106 Severity : enhancement
108 Description: correctly handle big reply message.
109 Details : send LNet event if reply is bigger then buffer and adjust this buffer
114 Description: Drop unnecessary __GFP_NOMEMALLOC flag from filter_get_page()
116 Severity : enhancement
118 Description: Add support for OEL5.
122 Description: Conf-sanity.sh 50g test - deactivated OST should not cause a panic.
126 Description: client could not reconnect to OST because of an active request.
127 Details : The client now retries to reconnect to the same server, if a
128 connect request failed with EBUSY or -EAGAIN. Test case 35b
129 conf-sanity.sh has been created.
133 Description: Don't allow make backward step on assignin osc next id.
134 Details : race between allocation next id and ll_sync thread can be cause
135 of set wrong osc next id and can be kill valid ost objects.
139 Description: Changes in raid5-large-io-rhel5.patch to calculate sectors properly
143 Description: Increase the default BLK_DEF_MAX_SECTORS value for RHEL5 and SLES11
147 Description: Error handling in osc_statfs_interpret() has been improved.
148 Details : Check in osc_statfs_interpret() for EBADR.
152 Description: Do not send statfs() requests to OSTs disabled by administrator.
153 Details : Check in lov_prep_statfs_set() for non-NULL ltd_exp.
155 Severity : enhancement
157 Description: Added sanity-quota test to for lfs(1) to work with numeric uid/gid.
159 Severity : enhancement
161 Description: Update kernel to RHEL5 2.6.18-128.7.1.el5.
163 Severity : enhancement
165 Description: Enhancement for lfs(1) command to use numeric uid/gid.
169 Description: Improved cleanup procedure for conf-sanity test_46a.
173 Description: Do not start bulk transfer, if client tried to reconnect.
174 Details : Do not start bulk transfer, if client tried to reconnect,
175 but failed due to active rpcs. Check for exp_abort_active_req
176 has been implemented.
180 Description: Prevent inconsistences between linux and lustre mount structures.
181 Details : Wait indefinitely in server_wait_finished() until mnt_count drops.
182 Make the sleep interruptible.
184 Severity : enhancement
186 Description: provide server to client comms path
187 Details : server to client communications path via new LDLM_SET_INFO rpc
191 Description: truncate starts GFP_FS allocation under transaction causing deadlock
192 Details : ldiskfs_truncate calls grab_cache_page which may start page
193 allocation under an open transaction. This may lead to
194 calling prune_icache with consequent lustre reentrance.
198 Description: send correctly lsm on open replay
199 Details : MDS is trust to LSM size on replay open, but client can set wrong size
204 Description: enable client interface failover
205 Details : When a child reconnects from another NID, properly update export
206 nid hash position and ldlm reverse import.
208 Severity : enhancement
210 Description: Communicate OST degraded/readonly state via statfs to MDS
211 Details : Flags in the statfs returned from OSTs indicate whether the
212 OST is in a degraded RAID state, or if the filesystem has
213 turned read-only after a filesystem error is detected.
218 Description: don't panic if EPROTO was hit when reading symlink
219 Details : correctly handling request reference in error cases.
221 Severity : enhancement
223 Description: Add LustreNetLink, a kernel-userspace communcation path.
225 Severity : enhancement
227 Description: Update kernel to SLES10 SP2 2.6.16.60-0.39.3.
232 Description: access to llog context before init.
233 Details : move handling CATALOGS file at osc layer and forbid access to llog
237 Frequency : rare, only when client is writing to OST on local node
239 Description: Avoid deadlock for local client writes
240 Details : Use new OBD_BRW_MEMALLOC flag to notify OST about writes in the
241 memory freeing context. This allows OST threads to set the
242 PF_MEMALLOC flag on task structures in order to allocate memory
243 from reserved pools and complete IO.
244 Use GFP_HIGHUSER for OST allocations for non-local client writes,
245 so that the OST threads generate memory pressure and allow
246 inactive pages to be reclaimed.
248 Severity : enhancement
250 Description: Update kernel to RHEL5.3 2.6.18-128.1.14.el5.
255 Description: lock ordering violation between &cli->cl_sem and _lprocfs_lock
256 Details : move ldlm namespace creation in setup phase to avoid grab
257 _lprocfs_lock with cli_sem held.
261 Description: Temporarily disable grant shrink.
262 Details : Disable the feature for debugging.
265 Frequency : only when formatting test filesystems
267 Description: Unable to run several mkfs.lustre on loop devices at the same time
268 Details : mkfs.lustre returns error 256 on the concurrent loop devices
269 formatting. The solution is to proper handle the error.
271 Severity : enhancement
273 Description: Update kernel to RHEL5.3 2.6.18-128.1.6.el5.
275 Severity : enhancement
277 Description: Update kernel to SLES10 SP2 2.6.16.60-0.37.
282 Description: resolve race between obd_disconnect and class_disconnect_exports
283 Details : if obd_disconnect will be called to already disconnected export he
284 forget release one reference and osc module can't unloaded.
286 Severity : enhancement
288 Description: Allow tuning service thread via /proc
289 Details : For each service a new
290 /proc/fs/lustre/{service}/*/thread_{min,max,started} entry is
291 created that can be used to set min/max thread counts, and get the
292 current number of running threads.
297 Descriptoin: don't return error if have partially created objects for file.
298 Details : lov_update_create_set uses set->set_success as index for created
299 objects, so if some requests will be failed, they will have hole
300 at end of array and qos_shrink_lsm for allocate correct lsm.
302 Severity : enhancement
304 Description: Update OFED support to 1.4.1
309 Description: Reduce small size read RPC
310 Details : Set read-ahead limit for every file and only do read-ahead when
311 available read-ahead pages are bigger than 1M to avoid small size
314 Severity : enhancement
316 Description: move AT tunable parameters for more consistent usage
317 Details : add AT tunables under /proc/sys/lustre, add to conf_param parsing
319 Severity : enhancement
321 Description: add lazystatfs mount option to allow statfs(2) to skip down OSTs
322 Details : allow skip disconnected ost for send statfs request and hide error
328 Description: fix racy locking of mballoc block bitmaps causing BUG
329 Details : The locking of the mballoc buddy bitmap and the in-memory
330 block bitmap was using two different spin locks in some
331 cases. This made it possible to incorrectly access the
332 mballoc bitmap while another process was modifying it,
333 causing a sanity assertion to fail. While no on-disk corruption
334 was reported, there was some risk of this happening.
337 Frequency : rare, on llog test 6
339 Descriptoin: don't allow connect to already connected import
340 Details : allowing connect to already connected import is hide connecting problem.
345 Descriptoin: allow kill process which wait statahead result
346 Details : for some reasons 'ls' can stick in waiting result from statahead,
347 in this case need way for kill this process.
349 Severity : enhancement
351 Description: Add state history info file, enhance import info file
352 Details : Track import connection state changes in a new osc/mdc proc file;
353 add overview-type data to the osc/mdc import proc file.
355 Severity : enhancement
357 Description: MDS create should not wait for statfs RPC while holding DLM lock.
359 Severity : enhancement
361 Description: Update to RHEL5U3 kernel-2.6.18-128.1.1.el5.
366 Descriptoin: OST grant too much space to client even there are not enough space.
367 Details : Client will shrink its grant cache to OST if there are no write
368 activity over 6 mins (GRANT_SHRINK_INTERVAL), and OST will retrieve
369 this grant cache if there are already not enough avaible space
370 (left_space < total_clients * 32M).
373 Frequency : start MDS on uncleanly shutdowned MDS device
375 Descriptoin: ll_sync thread stay in waiting mds<>ost recovery finished
376 Details : stay in waiting mds<>ost recovery finished produce random bugs
377 due race between two ll_sync thread for one lov target. send
378 ACTIVATE event only if connect realy finished and import have
382 Frequency : rare, connect and disconnect target at same time
384 Descriptoin: ASSERTION(atomic_read(&imp->imp_inflight) == 0
385 Details : don't call obd_disconnect under lov_lock. this long time
386 operation and can block ptlrpcd which answer to connect request.
391 Descriptoin: don't lose wakeup for imp_recovery_waitq
392 Details : recover_import_no_retry or invalidate_import and import_close can
393 both sleep on imp_recovery_waitq, but we was send only one wakeup
397 Frequency : always with long access acl
399 Descriptoin: mds can't pack reply with long acl.
400 Details : mds don't control size of acl but they limited by reint/getattr
403 Severity : enhancement
405 Description: Update to SLES10 kernel-2.6.16.60-0.33.
407 Severity : enhancement
409 Description: Update to RHEL5 kernel-2.6.18-92.1.22.el5.
412 Frequency : start MDS on uncleanly shutdowned MDS device
414 Descriptoin: aborting recovery hang on MDS
415 Details : don't throttle destroy RPCs for the MDT.
418 Frequency : on remount
420 Description: external journal device not working after the remount
421 Details : clear dev_rdonly flag for external journal devices in
427 Description: shutdown vs evict race
428 Details : client_disconnect_export vs connect request race.
429 if client will evicted at this time - we start invalidate
430 thread without referece to import and import can be freed
434 Frequency : rare, need acl's on inode.
436 Description: client can't handle ost additional correctly
437 Details : if ost was added after client connected to mds client can have
438 hit lnet_try_match_md ... to big messages to wide striped files.
439 in this case need teach client to handle config events about add
440 lov target and update client max ea size at that event.
442 Severity : enhancement
444 Description: Changelogs
445 Details : Changelogs are a lightweight mechanism to track filesystem
446 metadata and namespace changes. The changelog is recorded
447 permanently on the MDTs, and is periodically "consumed" / purged
448 when records are no longer needed.
450 Severity : enhancement
452 Description: compact fld format with extents
453 Details : Store range of seq rather than every seq in FLD. Seq
454 controller update FLD rather than clients. In Case of CMD, mdt0
455 has FLD, all other metadata server act as non persistent proxy
456 for FLD queries and cache fld entries in fld cache.
461 Description: don't skip ost target if they assigned to file
462 Details : Drop slow OSCs if we can, but not for requested start idx.
463 This means "if OSC is slow and it is not the requested
464 start OST, then it can be skipped, otherwise skip it only
465 if it is inactive/recovering/out-of-space.
469 Description: more cleanup in mds_lov
470 Details : not send LOV EA under replay, we can't know about they size at this
471 time. Don't allow client connect to mds before any ost connected,
472 for avoid problems with LOV EA size and returning EIO to client.
474 Severity : enhancement
476 Description: Interoperability at server side (Disk interoperability)
478 Severity : enhancement
480 Description: Update to RHEL5 kernel-2.6.18-92.1.17.el5.
482 Severity : enhancement
484 Description: Update to SLES10 SP2 kernel-2.6.16.60-0.31.
486 Severity : enhancement
488 Description: New client IO stack (CLIO).
490 Severity : enhancement
492 Description: Commit on sharing. Eliminate inter-client dependencies between
493 uncommitted transactions by doing transaction commits.
494 Thereby clients may recovery independently.
497 Frequency : Create a symlink file with a very long name
499 Description: ldlm_cancel_pack()) ASSERTION(max >= dlm->lock_count + count)
500 Details : If there is no extra space in the request for early cancels,
501 ldlm_req_handles_avail() returns 0 instead of a negative value.
503 Severity : enhancement
505 Description: Add /proc entry for import status
506 Details : The mdc, osc, and mgc import directories now have
507 an import directory that contains useful import data for debugging
510 Severity : enhancement
512 Description: Re-disable certain /proc logging
513 Details : Enable and disable client's offset_stats, extents_stats and
514 extents_stats_per_process stats logging on the fly.
517 Frequency : Only on FC kernels 2.6.22+
519 Description: oops in statahead
520 Details : Do not drop reference count for the dentry from VFS when lookup,
521 VFS will do that by itself.
523 Severity : enhancement
525 Description: Generic /proc file permissions
526 Details : Set /Proc file permissions in a more generic way to enable non-
527 root users operate on some /proc files.
531 Description: Hitting mdc_commit_close() ASSERTION
532 Details : Properly handle request reference release in
533 ll_release_openhandle().
537 Description: quota recovery deadlock during mds failover
538 Details : This patch includes att18982, att18236, att18237 in bz14840.
540 1. fix osts hang when mds does failover with quotaon
541 2. prevent watchdog storm when osts threads wait for the
546 Frequency : only patchless client
547 Description: add workaround for race between add/remove dentry from hash
549 Severity : enhancement
551 Description: Allow OST glimpses to return PW locks
555 Description: LBUG when llog conf file is full
556 Details : When llog bitmap is full, ENOSPC should be returned for plain log.
560 Description: Prevent import from entering FULL state when server in recovery
564 Description: service mount cannot take device name with ":"
565 Details : Only when device name contains ":/" will mount treat it as
571 Description: replace ptlrpcd with the statahead thread to interpret the async
572 statahead RPC callback
576 Frequency : on recovery
577 Description: I/O failures after umount during fail back
578 Details : if client reconnected to restarted server we need join to recovery
579 instead of find server handler is changed and process self
580 eviction with cancel all locks.
582 Severity : enhancement
584 Description: Update to RHEL5 kernel-2.6.18-92.1.10.el5.
586 Severity : enhancement
588 Description: Update to SLES10 SP2 kernel-2.6.16.60-0.27.
590 Severity : enhancement
592 Description: Upcall on Lustre log has been dumped
593 Details : Allow for a user mode script to be called once a Lustre log has
594 been dumped. It passes the filename of the dumped log to the
595 script, the location of the script can be specified via
596 /proc/sys/lnet/debug_log_upcall.
601 Description: avoid idr_remove called for id which is not allocated.
602 Details : Move assigment s_dev for clustered nfs to end of initialization,
603 to avoid problem with error handling.
608 Description: avoid Already found the key in hash [CONN_UNUSED_HASH] messages
609 Details : When connection is reused this not moved from CONN_UNUSED_HASH
610 into CONN_USED_HASH and this prodice warning when put connection
611 again in unused hash.
614 Severity : enhancement
616 Description: File striping can now be set to use an arbitrary pool of OSTs.
618 Severity : enhancement
620 Description: Export bytes_read/bytes_write count on OSC/OST.
624 Description: Early reply size mismatch, MGC loses connection
625 Details : Apply the MGS_CONNECT_SUPPORTED mask at reconnect time so
626 the connect flags are properly negotiated.
631 Description: quotas are not honored with O_DIRECT
632 Details : all writes with the flag O_DIRECT will use grants which leads to
633 this problem. Now using OBD_BRW_SYNC to guard this.
637 Description: add quota statistics
638 Details : 1. sort out quota proc entries and proc code.
639 2. add quota statistics
641 Severity : enhancement
643 Description: enable quota support for HEAD.
647 Description: Properly propagate oinfo flags from lov to osc for statfs
648 Details : restore missing copy oi_flags to lov requests.
650 Severity : enhancement
652 Description: Add man pages for llobdstat(8), llstat(8), plot-llstat(8),
653 : l_getgroups(8), lst(8), routerstat(8)
654 Details : included man pages for llobdstat(8), llstat(8),
655 : plot-llstat(8), l_getgroups(8), lst(8), routerstat(8)
657 Severity : enhancement
659 Description: configure's --enable-quota should check the
660 : kernel .config for CONFIG_QUOTA
661 Details : configure is terminated if --enable-quota is passed but
662 : no quota support is in kernel
666 Description: Remove portals compatibility
667 Details : Remove portals compatibility, not interoperable with releases
672 Description: Resolve device initialization race
673 Details : Prevent proc handler from accessing devices added to the
674 obd_devs array but yet be intialized.
676 Severity : enhancement
678 Description: Update to SLES10 SP2 kernel-2.6.16.60-0.23.
680 Severity : enhancement
682 Description: Update to RHEL5 kernel-2.6.18-92.1.6.el5.
687 Description: Using wrong pointer in osc_brw_prep_request
688 Details : Access to array[-1] can produce panic if kernel compiled with
689 CONFIG_PAGE_ALLOC enabled
693 Description: Client runs out of low memory
694 Details : Consider only lowmem when counting initial number of llap pages
698 Description: *optional* service tags registration
699 Details : if the "service tags" package is installed on a Lustre node
700 When the filesystem is mounted, a local-node service tag will
701 be created. See http://inventory.sun.com/ for more information
702 about the Service Tags asset management system.
706 Description: Kernel BUG tries to release flock
707 Details : Lustre does not destroy flock lock before last reference goes
708 away. So always drop flock locks when client is evicted and
709 perform unlock regardless of successfulness of speaking to MDS.
713 Description: add refcount protection for osc callbacks, avoid panic on shutdown
717 Description: sanity test 65a fails if stripecount of -1 is set
718 Details : handle -1 striping on filesystem in ll_dirstripe_verify
723 Description: ASSERTION(CheckWriteback(page,cmd)) failed
724 Details : badly clear PG_Writeback bit in ll_ap_completion can produce false
727 Severity : enhancement
729 Description: Update to RHEL5 kernel-2.6.18-53.1.21.el5.
733 Description: do not process already freed flock
734 Details : flock can possibly be freed by another thread before it reaches
735 to ldlm_flock_completion_ast.
739 Description: LBUG during stress test
740 Details : Need properly lock accesses the flock deadlock detection list.
744 Description: oops in page fault handler
745 Details : kernel page fault handler can return two special 'pages' in error
746 case, don't try dereference NOPAGE_SIGBUS and NOPAGE_OMM.
750 Description: timeout with invalidate import.
751 Details : ptlrpcd_check call obd_zombie_impexp_cull and wait request which
752 should be handled by ptlrpcd. This produce long age waiting and
753 -ETIMEOUT ptlrpc_invalidate_import and as result LASSERT.
755 Severity : enhancement
757 Description: Update to RHEL5 kernel-2.6.18-53.1.19.el5.
761 Description: enable MGS and MDT services start separately
762 Details : add a 'nomgs' option in mount.lustre to enable start a MDT with
763 a co-located MGS without starting the MGS, which is a complement
764 to 'nosvc' mount option.
768 Frequency : after recovery
769 Description: precreate to many object's after del orphan.
770 Details : del orphan st in oscc last_id == next_id and this triger growing
771 count of precreated objects. Set flag LOW to skip increase count
772 of precreated objects.
776 Frequency : rare, on clear nid stats
777 Description: ASSERTION(client_stat->nid_exp_ref_count == 0)
778 Details : when clean nid stats sometimes try destroy live entry,
779 and this produce panic in free.
783 Description: Stack overflow during MDS log replay
784 ease stack pressure by using a thread dealing llog_process.
788 Description: wait until IO finished before start new when do lock cancel.
789 Details : VM protocol want old IO finished before start new, in this case
790 need wait until PG_writeback is cleared until check dirty flag and
791 call writepages in lock cancel callback.
793 Severity : enhancement
795 Description: using special macro for print time and cleanup in includes.
799 Description: mds_mfd_close() ASSERTION(rc == 0)
800 Details : In mds_mfd_close(), we need protect inode's writecount change
801 within its orphan write semaphore to prevent possible races.
805 Description: Obsolete CURRENT_SECONDS and use cfs_time_current_sec() instead.
809 Frequency : rare, on shutdown ost
810 Description: don't hit live lock with umount ost.
811 Details : shrink_dcache_parent can be in long loop with destroy dentries,
812 use shrink_dcache_sb instead.
816 Description: don't panic with use echo client
817 Details : echo client pass NULL as client nid pointer and this produce null
822 Description: fix build on ppc32
823 Details : compile code with -m64 flag produce wrong object file for ppc32.
827 Description: add message levels for liblustreapi
831 Description: fix for occasional failure case of -ENOSPC in recovery-small tests
832 Details : Move the 'good_osts' check before the 'total_bavail' check. This
833 will result in an -EAGAIN and in the exit call path we call
834 alloc_rr() which will with increasing aggressiveness attempt to
835 aquire precreated objects on the minimum number of required OSCs.
839 Description: Use old size assignment to avoid deadlock
840 Details : Reverts the changes in bugs 2369 and bug 14138 that introduced
841 the scheduling while holding a spinlock. We do not need locking
842 for size in ll_update_inode() because size is only updated from
843 the MDS for directories or files without objects, so there is no
844 other place to do the update, and concurrent access to such inodes
845 are protected by the inode lock.
849 Description: resolve "_IOWR redefined" build error on SLES10
853 Description: dump the memory debugging after all modules are unloaded to
854 suppress false negative in conf_sanity test 39
856 Severity : enhancement
858 Description: build kernel-ib packages for OFED 1.3 in our release cycle
863 Description: fix SLES kernel versioning
864 Details : the kernel version for our SLES 10 kernel did not include a "-"
865 before the "smp" at the end. while this was not a problem in
866 general, it did mean that software trying to use the kernel
867 version to try to detect a vendor specific kernel would fail.
868 this was most evident by the OFED build scripts.
872 Description: Don't update lov_desc members until making sure they are valid
873 Details : When updating lov_desc members via proc fs, need fix their
874 validities before doing the real update.
878 Description: don't put request into delay list while invalidate in flight.
879 Details : ptlrpc_delay_request sometimes put in delay list while invalidate
880 import in flight. this produce timeout for invalidate and sometimes
881 can cause stale data.
885 Frequency : on ppc only
886 Description: not convert ost objects for directory because it's not exist.
887 Details : ll_dir_getstripe assume dirrectory has ost objects but this wrong.
891 Description: Add FMODE_EXEC file flag for SLES10 SP1 kernel.
893 Severity : enhancement
895 Description: Update to support 2.6.22.14 vanilla kernel.
899 Frequency : rare, on recovery
900 Description: read procfs can produce deadlock in some situation
901 Details : Holding lprocfs lock which send rpc can produce block for destroy
902 obd objects and this also block reconnect with -EALREADY. This
903 isn't fix all lprocfs bugs - but make it rare.
905 Severity : enhancement
907 Description: Update kernel to RHEL5 2.6.18-53.1.14.el5.
910 Frequency : frequent on X2 node
912 Description: mdc_set_open_replay_data LBUG
913 Details : Set replay data for requests that are eligible for replay.
917 Description: lustre_mgs: operation 101 on unconnected MGS
918 Details : When MGC is disconnected from MGS long enough, MGS will evict the
919 MGC, and late on MGC cannot successfully connect to MGS and a lot
920 of the error messages complaining that MGS is not connected.
924 Frequency : on network error
925 Description: panic with double free request if network error
926 Details : mdc_finish_enqueue is finish request if any network error ocuring,
927 but it's true only for synchronus enqueue, for async enqueue
928 (via ptlrpcd) this incorrect and ptlrpcd want finish request
931 Severity : enhancement
933 Description: client-side metadata stat-ahead during readdir(directory readahead)
934 Details : perform client-side metadata stat-ahead when the client detects
935 readdir and sequential stat of dir entries therein
938 Frequency : on start mds
940 Description: Implement get_info(last_id) in obdfilter.
943 Frequency : occasional
945 Description: Correctly check stale fid, not start epoch if ost not support SOM
946 Details : open with flag O_CREATE need set old fid in op_fid3 because
947 op_fid2 was overwritten with new generated fid, but mds can answer
948 with one of these two fids and both is not stale. Setattr
949 incorrectly started an epoch and assume will be called
950 done_writing, but without SOM done_writing ever being called.
953 Frequency : rare, depends on device drivers and load
955 Description: MDS or OSS nodes crash due to stack overflow
956 Details : Code changes in 1.8.0 increased the stack usage of some functions.
957 In some cases, in conjunction with device drivers that use a lot
958 of stack the MDS (or possibly OSS) service threads could overflow
959 the stack. One change which was identified to consume additional
960 stack has been reworked to avoid the extra stack usage.
963 Frequency : occasional
965 Description: Do not fail import if osc_interpret_create gets -EAGAIN
966 Details : If osc_interpret_create got -EAGAIN it immediately exits and
967 wakeup oscc_waitq. After wakeup oscc_wait_for_objects call
968 oscc_has_objects and see OSC has no objests and call
969 oscc_internal_create to resend create request.
971 Severity : enhancement
973 Description: Update to SLES10 SP1 latest kernel-2.6.16.54-0.2.5.
975 Severity : enhancement
977 Description: Update to RHEL5 latest kernel-2.6.18-53.1.13.el5.
980 Frequency : very rare
982 Description: Fix replay if there is an un-replied request and open
983 Details : In some cases, older replay request will revert the
984 mcd->mcd_last_xid on MDS which is used to record the client's
987 Severity : enhancement
989 Description: Update to RHEL5 latest kernel-2.6.18-53.1.6.el5.
991 Severity : enhancement
993 Description: Add rhel5 support to HEAD.
995 Serverity : enhancement
997 Description: Update RHEL4 kernel to 2.6.9-67.0.4.
1002 Description: Don't allow skipping OSTs if index has been specified.
1003 Details : Don't allow skipping OSTs if index has been specified, make
1004 locking in internal create lots better.
1008 Description: LBUG in ptlrpc_check_set() bad phase ebc0de00
1009 Details : access to bitfield in structure is always rounded to long
1010 and this produce problem with not atomic change any bit.
1014 Description: Lustre make rpms failed.
1015 Details : Remove ldiskfs spec file to avoids rpmbuild be confused when
1016 builds Lustre rpms from tarball.
1019 Frequency : rare on shutdown ost
1021 Description: If llog cancel was not send before clean_exports phase, this can
1022 produce deadlock in llog code.
1023 Details : If llog thread has last reference to obd and call class_import_put
1024 this produce deadlock because llog_cleanup_commit_master wait when
1025 last llog_commit_thread exited, but this never success because was
1026 called from llog_commit_thread.
1030 Description: allow userland application know is lost one of stripes.
1031 Details : fill lvb_blocks with error code on ost and return it to
1032 application if error flag found.
1036 Description: NULL lov_tgts causing MDS oops
1037 Details : more safe checks for NULL lov_tgts for avoid oops.
1039 Severity : enhancement
1041 Description: Update to RHEL4 latest kernel-2.6.9-67.0.1.EL.
1045 Descriptoin: make lov_create() will not stuck in obd_statfs_rqset()
1046 Details : If an OST is down the MDS will hang indefinitely in
1047 obd_statfs_rqset() waiting for the statfs data. While for
1048 MDS QOS usage of statfs, it should not stuck in waiting.
1050 Severity : enhancement
1052 Description: remote_acl support
1053 Details : Support ACL-based permission check for remote user.
1054 Support setfacl/getfacl for remote user with the utils
1055 "lfs {l,r}{s,g}etfacl" which follow the same parameter format as
1056 the system "{s,g}etfacl" utils.
1058 Severity : enhancement
1060 Description: Update to RHEL4 U6 kernel-2.6.9-67.EL.
1062 Severity : enhancement
1064 Description: Update to RHEL5 latest kernel-2.6.18-53.1.4.el5.
1068 Description: make mgs_setparam() handle fsname containing dash
1069 Details : fsname containing a dash does not work with lctl conf_param
1071 Severity : enhancement
1073 Description: Update to SLES10 SP1 latest kernel-2.6.16.54-0.2.3.
1075 Severity : enhancement
1077 Description: Update to RHEL5 Update-1 kernel 2.6.18-53.el5.
1081 Frequency : rare, at shutdown
1082 Description: access already free / zero obd_namespace.
1083 Details : if client_disconnect_export was called without force flag set,
1084 and exist connect request in flight, this can produce access to
1085 NULL pointer (or already free pointer) when connect_interpret
1086 store ocd flags in obd_namespace.
1090 Frequency : only at startup
1091 Description: not alloc memory with spinlock held.
1092 Details : allocation memory with GFP_KERNEL can produce sleep deadlock,
1093 if any spinlock held.
1095 Severity : enhancement
1097 Description: make lustre randomly fail allocating memory
1098 Details : Make lustre randomly failed allocating memory for testing purpose.
1100 Severity : enhancement
1102 Description: lost problems with lov objid file
1103 Details : Fixes some scability and access to not inited memory problems
1104 in work with lov objdid file.
1109 Description: lfs find does not continue on file error
1110 Details : Continue other files processing when a file/dir is absent.
1114 Description: Inconsistent usage of lustre_pack_reply()
1115 Details : Standardize the usage of lustre_pack_reply() such that it
1116 always generate a CERROR on failure.
1119 Frequency : occasional
1121 Description: MDS hang or stay in waiting lock
1122 Details : If client receive lock with CBPENDING flag ldlm need send lock
1123 cancel as separate rpc, to avoid situation when cancel request
1124 can't processed due all i/o threads stay in wait lock.
1128 Description: Update to RHEL5 kernel 2.6.18-8.1.15.el5.
1132 Description: Update to SLES10 SP1 kernel 2.6.16.53-0.16
1136 Description: Update to SLES9 kernel-2.6.5-7.287.3.
1140 Description: Update to RHEL4 latest kernel.
1142 Severity : enhancement
1144 Description: Build SLES10 patchless client fails
1145 Details : The configure was broken by run ./configure with
1146 --with-linux-obj=.... argument for patchless client. When the
1147 configure use --with-linux-obj, the LINUXINCLUDE= -Iinclude
1148 can't search header adequately. Use absolute path such as
1149 -I($LINUX)/include instead.
1153 Description: interrupt oig_wait produce painc on resend.
1154 Details : brw_redo_request can be used for resend requests from ptlrpcd and
1155 private set, and this produce situation when rq_ptlrpcd_data not
1156 copyed to new allocated request and triggered LBUG on assert
1157 req->rq_ptlrpcd_data != NULL. But this member used only for wakeup
1158 ptlrpcd set if request is changed and can be safety changed to use
1163 Description: LASSERT_{REQ,REP}SWAB macros are buggy
1164 Details : If SWAB_PARANOIA is disabled, the LASSERT_REQSWAB and
1165 LASSERT_REPSWAB macros become no-ops, which is incorrect. Drop
1166 these macros and replace them with their difinitions instead.
1170 Description: Update kernel patches for SLES10 2.6.16.53-0.8.
1171 Details : Update which_patch & target file for SLES10 latest kernel.
1174 Description: Remove client patches from SLES 10 kernel.
1175 Details : This causes SLES 10 clients to behave as patchless clients
1176 even on a Lustre-patched (server) kernel.
1178 Severity : enhancement
1180 Description: self-adjustable client's lru lists
1181 Details : use adaptive algorithm for managing client cached locks lru
1182 lists according to current server load, other client's work
1183 pattern, memory activities, etc. Both, server and client
1184 side namespaces provide number of proc tunables for controlling
1187 Severity : enhancement
1189 Description: light-weight GSS support
1190 Details : Support krb5n and krb5a mode, which keep Kerberos 5 authentication
1191 and reduce performance overhead.
1193 Severity : enhancement
1195 Description: Linux keyring support
1196 Details : Support using service of Linux keyring for Lustre GSS internal
1197 context refresh/cache mechanism.
1201 Description: Fix errors in lfs documentation
1202 Details : Fixes man pages
1206 Description: don't use GFP_* in generic Lustre code.
1207 Details : Use cfs_alloc_* functions and CFS_* flags for code portability.
1211 Description: obdclass is limited by single OBD_ALLOC(idarray)
1212 Details : replace OBD_ALLOC/OBD_FREE with OBD_VMALLOC/OBD_VFREE
1216 Description: warnings with build patchless client with vanila 2.6.19 and up
1217 Details : change old ctl_table style and replace ctl_table/ctl_table_header
1218 with cfs_sysctl_table_t/cfs_sysctl_table_header_t
1222 Frequency : Only for SLES
1223 Description: sanity_quota fail test_1
1224 Details : There are multiple occurences of $TSTUSR in SLES's /etc/group
1225 file, which makes TSTID[2] inunique.
1229 Frequency : Only for SLES9
1230 Description: Kernel patches for SLES9 2.6.5-7.286 kernel
1231 Details : Update target/ChangeLog/which_patch .
1235 Frequency : Only for test_10 in sanity-quota.sh
1236 Description: a bug in quota test code
1237 Details : checking a test flag in a wrong place
1241 Frequency : Only for test_13 in sanity-quota.sh
1242 Description: a bug in quota test script
1243 Details : shouldn't check overfull allocated quota
1247 Description: jbd statistics
1248 Details : Port older jbd statistics patch for sles10
1250 Severity : enhancement
1252 Description: Add printing inode info into message about error in writepage.
1257 Description: reply_lock_interpret crash due to race with it and lock cancel.
1258 Details : Do not replay locks that are being cancelled. Do not reference
1259 locks by their address during replay, just by their handle.
1263 Frequency : When flocks are used.
1264 Description: assertion failure in ldlm_cli_enquque_fini for non NULL lock.
1265 Details : Flock locks might destroy just granted lock if it could be merged
1266 with another existing flock, this is done in completion handler,
1267 so teach ldlm_cli_enquque_fini that this is a valid case for
1273 Description: Oops in read and write path when failing to allocate lock.
1274 Details : Check if lock allocation failed and return error back.
1278 Description: lstripe command fails for valid OST index
1279 Details : The stripe offset is compared to lov->desc.ld_tgt_count
1280 instead of lov->desc.ld_active_tgt_count.
1284 Description: sanity.sh failed test 103
1285 Details : RHEL mis-interpret setfacl "-X" param, so we won't test setfacl
1290 Description: df doesn't work properly if diskfs blocksize != 4K
1291 Details : Choose biggest blocksize of OST's as the LOV's blocksize.
1295 Description: lfs find on -1 stripe looping in lsm_lmm_verify_common()
1296 Details : Avoid lov_verify_lmm_common() on directory with -1 stripe count.
1298 Severity : enhancement
1300 Description: Adaptive timeouts
1301 Details : RPC timeouts adapt to changing server load and network
1302 conditions to reduce resend attempts and improve recovery time.
1306 Description: llapi_file_create() does not allow some changes
1307 Details : add llapi_file_open() that allows specifying the mode and
1308 open flags, and also returns an open file handle.
1312 Description: merge and cleanup kernel patches.
1313 Details : Remove mnt_lustre_list in vfs_intent-2.6-rhel4.patch.
1317 Description: Add journal checksum support.(Kernel part)
1318 Details : The journal checksum feature adds two new flags i.e
1319 JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT and
1320 JBD2_FEATURE_COMPAT_CHECKSUM. JBD2_FEATURE_CHECKSUM flag
1321 indicates that the commit block contains the checksum for
1322 the blocks described by the descriptor blocks. Now commit
1323 record can be sent to disk without waiting for descriptor
1324 blocks to be written to disk. This behavior is controlled
1325 using JBD2_FEATURE_ASYNC_COMMIT flag.
1329 Description: OSS needs mutliple precreate threads
1330 Details : Add ability to start more than one create thread per OSS.
1334 Description: Sanity.sh test_65k failed: setstripe should have succeeded
1335 Details : execute lfs setstripe on client
1339 Description: mds_obd_create error creating tmp object
1340 Details : When the user sets quota on root, llog will be affected and can't
1341 create files and write files.
1344 Frequency : Always on ia64 patchless client, and possibly others.
1346 Description: Add EXPORT_SYMBOL check for node_to_cpumask symbol.
1347 Details : This allows the patchless client to be loaded on architectures
1348 without this export.
1352 Description: RedHat Update kernel for RHEL5
1353 Details : Add the kernel config file for RHEL5.
1357 Description: RedHat Update kernel for RHEL5
1358 Details : Modify the kernel config file more closer RHEL5.
1362 Description: Build failure against Centos5 (RHEL5)
1363 Details : Define PAGE_SIZE when it isn't present.
1367 Description: test_7 on sanity-quota.sh can't be used on separate machines
1368 Details : add facet to handle it
1372 Description: "ll_intent_file_open()) lock enqueue: err: -13" with nfs
1373 Details : with NFS, the anon dentry's parent was set to itself in
1374 d_alloc_anon(), so in MDS, we use rec->ur_fid1 to find the
1375 corresponding dentry other than use rec->ur_name.
1377 Severity : enhancement
1379 Description: lfs setstripe enhancement
1380 Details : Make lfs setstripe understand 'k', 'm' and 'g' for stripe size.
1384 Description: enable data checksumming by default
1385 Details : enable checksum by default, allow --disable-checksum
1386 configure option and "-o nochecksum" mount option. Checksums
1387 can also be disabled at runtime via $LPROC/osc/*/checksum_pages.
1391 Description: lustre support for RHEL5
1392 Details : Add support for RHEL5.
1396 Description: Client eviction due to failover config
1397 Details : after a connection loss, the lustre client should attempt to
1398 reconnect to the last active server first before trying the
1399 other potential connections.
1403 Description: when mds and osts use different quota unit(32bit and 64bit),
1404 quota will be released repeatly.
1405 Details : void sending multiple quota reqs to mds, which will keep the
1406 status between the reqs.
1410 Description: osts not allocated evenly to files
1411 Details : change the condition to increase offset_idx
1414 Frequency : Always for filesystems larger than 2TB on 32-bit systems.
1416 Description: Data corruption for OSTs that are formatted larger than 2TB
1418 Details : When generating the bio request for lustre file writes the
1419 sector number would overflow a temporary variable before being
1420 used for the IO. The data reads correctly from Lustre (which
1421 will overflow in a similar manner) but other file data or
1422 filesystem metadata may be corrupted in some cases.
1426 Description: Tune the kernel for good SCSI performance.
1427 Details : Set the value of /sys/block/{dev}/queue/max_sectors_kb
1428 to the value of /sys/block/{dev}/queue/max_hw_sectors_kb
1433 Description: rewrite ext2-derived code in obdclass/uuid.c
1434 Details : rewrite inherited code (uuid parsing code from ext2 utils)
1435 from scratch preserving functionality.
1439 Description: "lfs find -obd UUID" prints directories
1440 Details : "lfs find -obd UUID" will return all directory names instead
1441 of just file names. It is incorrect because the directories
1442 do not reside on the OSTs.
1446 Description: use i_size_read and i_size_write in 2.6 port
1447 Details : replace inode->i_size access with i_size_read/write()
1450 Frequency : when removing large files
1452 Description: scheduling issue during removal of large Lustre files
1453 Details : Don't take the BKL in fsfilt_ext3_setattr() for 2.6 kernels.
1454 It causes scheduling issues when removing large files (17TB in the
1458 Frequency : only with liblustre clients on XT3
1460 Description: evictions taking too long
1461 Details : allow llrd to evict clients directly on OSTs
1464 Frequency : only on ppc
1466 Description: /proc/fs/lustre/devices broken on ppc
1467 Details : The patch as applied to 1.6.2 doesn't look correct for all arches.
1468 We should make sure the type of 'index' is loff_t and then cast
1469 explicitly as needed below. Do not assign an explicitly cast
1473 Frequency : only for rhel5
1475 Description: Kernel patches update for RHEL5 2.6.18-8.1.10.el5.
1476 Details : Modify the target file & which_kernel.
1478 Severity : enhancement
1480 Description: omit set fsid for export NFS
1481 Details : fix set/restore device id for avoid EMFILE error and mark lustre
1482 fs as FS_REQUIRES_DEV for avoid problems with generate fsid.
1486 Frequency : Always, for kernels after 2.6.16
1487 Description: Fix warning idr_remove called for id=.. which is not allocated.
1488 Details : Last kernels save old s_dev before kill super and not allow
1489 to restore from callback - restore it before call kill_anon_super.
1493 Description: buffer overruns could theoretically occur
1494 Details : llapi_semantic_traverse() modifies the "path" argument by
1495 appending values to the end of the origin string, and a
1496 overrun may occur. Adding buffer overrun check in liblustreapi.
1500 Description: Fix error on 'ls .' at the top of the Lustre mount.
1501 Details : Don't revalidate dentry if it is a root dentry.
1505 Description: Kernel patches update for RHEL4 2.6.9-55.0.6.
1506 Details : Modify vm-tunables-rhel4.patch.
1510 Description: Kernel config for 2.6.18-vanilla.
1511 Details : Modify targets/2.6-vanilla.target.in.
1512 Add config file kernel-2.6.18-2.6-vanilla-i686.config.
1513 Add config file kernel-2.6.18-2.6-vanilla-i686-smp.config.
1514 Add config file kernel-2.6.18-2.6-vanilla-x86_64.config.
1515 Add config file kernel-2.6.18-2.6-vanilla-x86_64-smp.config.
1519 Description: improve handling recoverable errors
1520 Details : if request processig with error which can be recoverable on server
1521 request should be resend, otherwise page released from cache and
1526 Description: Kernel patches update for RHEL5 2.6.18-8.1.14.el5.
1527 Details : Modify target file & which_patch.
1528 A flaw was found in the IA32 system call emulation provided
1529 on AMD64 and Intel 64 platforms. An improperly validated 64-bit
1530 value could be stored in the %RAX register, which could trigger an
1531 out-of-bounds system call table access. An untrusted local user
1532 could exploit this flaw to run code in the kernel
1533 (ie a root privilege escalation). (CVE-2007-4573).
1537 Description: O_DIRECT bypasses client statistics.
1538 Details : When running with O_DIRECT I/O, neither the client rpc_stats nor
1539 read_ahead_stats were updated. copied the stats section from
1540 osc_send_oap_rpc() into async_internal().
1544 Description: Add jbd statistics patch for RHEL5 and 2.6.18-vanilla
1548 Description: change order of libsysio includes
1549 Details : '#include sysio.h' should always come before '#include xtio.h'
1553 Description: handle "serious error: objid * already exists" more gracefully
1554 Details : If LAST_ID value on disk is smaller than the objects existing in
1555 the O/0/d* directories, it indicates disk corruption and causes an
1556 LBUG(). If the object is 0-length, then we should use the existing
1557 object. This will help to avoid a full fsck in most cases.
1559 Severity : enhancement
1561 Description: adapt the lustre_config script to support the upgrade case
1562 Details : Add "-u" option for lustre_config script to support upgrading 1.4
1563 server targets to 1.6 in parallel.
1567 Description: To avoid grant space > avaible space when the disk is almost
1568 full. Without this patch you might see the error "grant XXXX >
1569 available" or some LBUG about grant, when the disk is almost
1571 Details : In filter_check_grant, for non_grant cache write, we should
1572 check the left space by if (*left > ungranted + bytes), instead
1573 of (*left > ungranted), because only we are sure the left space
1574 is enough for another "bytes", then the ungrant space should be
1575 increase. In client, we should update cl_avail_grant only there
1576 is OBD_MD_FLGRANT in the reply.
1580 Description: Update RHEL 4 kernel to fix local root privilege escalation.
1581 Details : Update to the latest RHEL 4 kernel to fix the vulnerability
1582 described in CVE-2007-4573. This problem could allow untrusted
1583 local users to gain root access.
1586 Frequency : when using O_DIRECT and quotas
1588 Description: Incorrect file ownership on O_DIRECT output files
1589 Details : block usage reported by 'lfs quota' does not take into account
1590 files that have been written with O_DIRECT.
1595 Description: touch file failed when fs is not full
1596 Details : OST in recovery should not be discarded by MDS in alloc_qos(),
1597 otherwise we can get ENOSP while fs is not full.
1601 Description: parallel lock callbacks
1602 Details : Instead of sending blocking and completion callbacks as separated
1603 requests, adding them to a set and sending in parallel.
1606 Frequency : only for Cray XT3
1607 Bugzilla : 12829/13455
1608 Description: Changing primary group doesn't change the group lustre assigns to
1610 Details : When CRAY_XT3 is defined, the fsgid supplied by the client is
1611 overridden with the primary group provided by the group upcall,
1612 whereas the supplied fsgid can be trusted if it is in the list of
1613 supplementary groups returned by the group upcall.
1615 Severity : enhancement
1617 Description: Allow masking D_WARNING, D_ERROR messages from console
1618 Details : Console messages can now be disabled via lnet.printk.
1622 Description: User code with malformed file open parameter crashes client node
1623 Details : Before packing join_file req, all the related reference should be
1624 checked carefully in case some malformed flags cause fake
1625 join_file req on client.
1629 Description: LDLM_ENQUEUE races with LDLM_CP_CALLBACK
1630 Details : ldlm_completion_ast() assumes that a lock is granted when the req
1631 mode is equal to the granted mode. However, it should also check
1632 that LDLM_FL_CP_REQD is not set.
1636 Description: Heavy nfs access might result in deadlocks
1637 Details : After ELC code landed, it is now improper to enqueue any mds
1638 locks under och_sem, because enqueue might want to decide to
1639 cancel open locks for same inode we are holding och_sem for.
1643 Description: Client eviction while running blogbench
1644 Details : A lot of unlink operations with concurrent I/O can lead to a
1645 deadlock causing evictions. To address the problem, the number of
1646 oustanding OST_DESTROY requests is now throttled to
1647 max_rpcs_in_flight per OSC and LDLM_FL_DISCARD_DATA blocking
1648 callbacks are processed in priority.
1652 Description: enable ACLs on MDS by default
1653 Details : ACLs must be enabled on MDS by default.
1656 Frequency : PPC/PPC64 only
1658 Description: conflicts between asm-ppc64/types.h and lustre_types.h
1659 Details : fix duplicated definitions between asm-ppc64/types.h and
1660 lustre_types.h on PPC.
1663 Frequency : PPC/PPC64 only
1665 Description: asm-ppc/segment.h does not exist
1666 Details : fix compile issue on PPC.
1670 Description: better handle error messages in extents code
1673 Frequency : RHEL4 only
1675 Description: mkfs is very slow on IA64/RHEL4
1676 Details : A performance regression has been discovered in the MPT Fusion
1677 driver between versions 3.02.73rh and 3.02.99.00rh. As a
1678 consequence, we have downgraded the MPT Fusion driver in the RHEL4
1679 kernel from 3.02.99.00 to 3.02.73 until this problem is fixed.
1681 Severity : enhancement
1683 Description: SNMP support enhancement
1684 Details : Adding total number of sampled request for an MDS node in snmp
1687 Severity : enhancement
1689 Description: Optimize ldlm waiting list processing for PR extent locks
1690 Details : When processing waiting list for read extent lock and meeting read
1691 lock that is same or wider to it that is not contended, skip
1692 processing rest of the list and immediatelly return current
1693 status of conflictness, since we are guaranteed there are no
1694 conflicting locks in the rest of the list.
1698 Description: Time out and refuse to reconnect
1699 Details : When the failover node is the primary node, it is possible
1700 to have two identical connections in imp_conn_list. We must
1701 compare not conn's pointers but NIDs, otherwise we can defeat
1702 connection throttling.
1706 Description: port llog fixes from b1_6 into HEAD
1707 Details : Port llog reference couting and some llog cleanups from b1_6
1708 (bug 10800) into HEAD, for protect from panic and access to already
1709 free llog structures.
1713 Description: Detect stride IO mode in read-ahead
1714 Details : When a client does stride read, read-ahead should detect that and
1715 read-ahead pages according to the detected stride pattern.
1719 Description: data checksumming impacts single node performance
1720 Details : add support for several checksum algorithm. Currently, only CRC32
1721 and Adler-32 are supported. The checksum type can be changed on
1722 the fly via /proc/fs/lustre/osc/*/checksum_type.
1726 Description: use adler32 for page checksums
1727 Details : when available, use the Adler-32 algorithm instead of CRC32 for
1732 Description: build for x2 fails
1733 Details : fix compile issue on Cray systems.
1737 Description: Properly match for duplicate locks
1738 Details : Due to different lock order from skiplists code, we need to
1739 traverse entire list for now
1742 Frequency : only on PPC/SLES10
1744 Description: "BITS_PER_LONG is not 32 or 64" in linux/idr.h
1745 Details : On SLES10/PPC, fs.h includes idr.h which requires BITS_PER_LONG to
1746 be defined. Add a hack in mkfs_lustre.c to work around this compile
1751 Description: LASSERT on MDS when client holding flock lock dies
1752 Details : ldlm pool logic depends on number of granted locks equal to
1753 number of released locks which is not true for flock locks, so
1754 just exclude such locks from consideration.
1758 Description: MDS deadlock with many ll_sync_lov threads and I/O stalled
1759 Details : Use fsfilt_sync() for both the whole filesystem sync and
1760 individual file sync to eliminate dangerous inode locking
1761 with I_LOCK that can lead to a deadlock.
1765 Description: performance in 1.6.3
1766 Details : Force q->max_phys_segments to MAX_PHYS_SEGMENTS on SLES10 to be
1767 sure that 1MB requests are not fragmented by the block layer.
1769 Severity : enhancement
1771 Description: organize the server-side client stats on per-nid basis
1772 Details : Change the structure of stats under obdfilter and mds to
1780 The "uuid"s file would list the uuids of _active_ exports.
1781 And the clear entry is to clear all stats and stale nids.
1783 Severity : enhancement
1785 Description: eliminate client locks in face of contention
1786 Details : file contention detection and lockless i/o implementation
1787 for contended files.
1791 Description: Reinitialize optind to 0 so that interactive lfs works in all cases
1794 Frequency : very rare, if additional xattrs are used on kernels >= 2.6.12
1796 Description: MDS may lose file striping (and hence file data) in some cases
1797 Details : If there are additional extended attributes stored on the MDS,
1798 in particular ACLs, SELinux, or user attributes (if user_xattr
1799 is specified for the client mount options) then there is a risk
1800 of attribute loss. Additionally, the Lustre file striping
1801 needs to be larger than default (e.g. striped over all OSTs),
1802 and an additional attribute must be stored initially in the
1803 inode and then increase in size enough to be moved to the
1804 external attribute block (e.g. ACL growing in size) for file
1809 Description: skiplist implementation simplification
1810 Details : skiplists are used to group compatible locks on granted list
1811 that was implemented as tracking first and last lock of each
1812 lock group the patch changes that to using doubly linked lists
1816 Description: MDS LBUG: ASSERTION(!IS_ERR(dchild))
1817 Details : Change LASSERTs to client eviction (i.e. abort client's recovery)
1818 because LASSERT on both the data supplied by a client, and the
1819 data on disk is dangerous and incorrect.
1821 Severity : enhancement
1823 Description: Slow truncate/writes to huge files at high offsets.
1824 Details : Directly associate cached pages to lock that protect those pages,
1825 this allows us to quickly find what pages to write and remove
1826 once lock callback is received.
1830 Description: more ldlm soft lockups
1831 Details : In ldlm_resource_add_lock(), call to ldlm_resource_dump()
1832 starve other threads from the resource lock for a long time in
1833 case of long waiting queue, so change the debug level from
1834 D_OTHER to the less frequently used D_INFO.
1836 Severity : enhancement
1838 Description: add -gid, -group, -uid, -user options to lfs find
1842 Description: Hung threads in invalidate_inode_pages2_range
1843 Details : The direct IO path doesn't call check_rpcs to submit a new RPC
1844 once one is completed. As a result, some RPCs are stuck in the
1845 queue and are never sent.
1849 Description: filter threads hungs on waiting journal commit
1850 Details : Cleanup filter group llog code, then only filter group llog will
1851 be only created in the MDS/OST syncing process.
1855 Description: Procfs and llog threads access destoryed import sometimes.
1856 Details : Sync the import destoryed process with procfs and llog threads by
1857 the import refcount and semaphore.
1859 Severity : enhancement
1861 Description: openlock cache of b1_6 port to HEAD
1866 Description: kernel BUG at ldiskfs2_ext_new_extent_cb
1867 Details : If insertion of an extent fails, then discard the inode
1868 preallocation and free data blocks else it can lead to duplicate
1873 Description: don't always update ctime in ext3_xattr_set_handle()
1874 Details : Current xattr code updates inode ctime in ext3_xattr_set_handle.
1875 In some cases the ctime should not be updated, for example for
1876 2.0->1.8 compatibility it is necessary to delete an xattr and it
1877 should not update the ctime.
1881 Bugzilla : 15713/16362
1882 Description: Assertion in iopen_connect_dentry in 1.6.3
1883 Details : looking up an inode via iopen with the wrong generation number can
1884 populate the dcache with a disconneced dentry while the inode
1885 number is in the process of being reallocated. This causes an
1886 assertion failure in iopen since the inode's dentry list contains
1887 both a connected and disconnected dentry.
1891 Description: assertion failure in ldlm_handle2lock()
1892 Details : fix a race between class_handle_unhash() and class_handle2object()
1893 introduced in lustre 1.6.5 by bug 13622.
1898 Description: Kernel BUG: sd_iostats_bump: unexpected disk index
1899 Details : remove the limit of 256 scsi disks in the sd_iostat patch
1904 Description: oops in sd_iostats_seq_show()
1905 Details : unloading/reloading the scsi low level driver triggers a kernel
1906 bug when trying to access the sd iostat file.
1911 Description: Kernel panics during QLogic driver reload
1912 Details : REQ_BLOCK_PC requests are not handled properly in the sd iostat
1913 patch, causing memory corruption.
1918 Description: journal_dev option does not work in b1_6
1919 Details : pass mount option during pre-mount.
1921 Severity : enhancement
1923 Description: Add a FIEMAP(FIle Extent MAP) ioctl
1924 Details : FIEMAP ioctl will allow an application to efficiently fetch the
1925 extent information of a file. It can be used to map logical blocks
1926 in a file to physical blocks in the block device.
1930 Description: LDLM soft lockups - improvement
1931 Details : It is be possible to send the lock handle along with each read
1932 or write request because the client is already doing a lock match
1933 itself so there isn't any reason the OST should have to re-do that
1937 Frequency : only on Cray X2
1939 Description: X2 build failures
1940 Details : fix build failures on Cray X2.
1944 Description: xid & resent requests
1945 Details : Initialize RPC XID from clock at startup (randomly if clock is
1948 Severity : enhancement
1950 Description: Add lustre_start utility to start or stop multiple Lustre servers
1955 Description: Lustre GPF in {:ptlrpc:ptlrpc_server_free_request+373}
1956 Details : In case of memory pressure, list_del() can be called twice on
1957 req->rq_history_list, causing a kernel oops.
1961 Description: kptllnd_peer_check_sends()) ASSERTION(!in_interrupt()) failed
1962 Details : fix stack overflow in the distributed lock manager by defering
1963 export eviction after a failed AST to the elt thread instead of
1964 handling it in the dlm interpret routine.
1968 Description: Convert some comments to new format.
1969 Details : Update documenting comments to match doxygen conventions.
1973 Description: Grammar fixes.
1974 Details : A couple of trivial spelling fixes.
1978 Description: OSD_COUNTERS-mandatory
1979 Details : Make previously optional ->oti_{w,r}_locks sanity checks mandatory
1980 to simplify the code.
1984 Description: simplify cmm_device freeing logic.
1985 Details : Call cmm_device_free() in the failure path of cmm_device_alloc().
1989 Description: Add lockdep support to dt_object_operations locking interface.
1990 Details : Augment ->do_{read,write}_lock() prototypes with a `role'
1991 parameter indicating lock ordering. Update mdd code to use new
1996 Description: Introduce failloc constants for lockless IO tests.
1997 Details : Add two new failloc constants to test lockless IO. Only one of
1998 them in implemented---another is checked in yet to be landed
2003 Description: Add lockdep support for inode mutex.
2004 Details : Introduce and use new LOCK_INODE_MUTEX_PARENT() macro to be used
2005 in the situations where Lustre has to lock more than one inode
2010 Description: Add optional invariants checking support.
2011 Details : Add new LINVRNT() macro, optional on new --enable-invariants
2012 configure switch. This macro is to be used for consistency and
2013 sanity checks that are too expensive to be left in `production'
2018 Description: Zap lock->l_granted_mode with explicit LCK_MINMODE.
2019 Details : Use LCK_MINMODE rather than 0 to reset lock->l_granted_mode to
2024 Description: Add lockdep support for ldlm_lock and ldlm_resource.
2025 Details : Use spin_lock_nested() in (the only) situation where more than
2026 one ldlm_lock is locked simultaneously. Also, fix possible
2027 dead-lock in ldlm_lock_change_resource() by enforcing particular
2032 Description: Use struct ldlm_callback_suite in ldlm_lock_create().
2033 Details : Instead of specifying each ldlm_lock call-back through separate
2034 parameter, wrap them into struct ldlm_callback_suite.
2038 Description: Kill join_lru obd method and its callers.
2039 Details : CLIO uses lock weighting policy to keep locks over mmapped regions
2040 in memory---a requirement implemented through ->o_join_lru() obd
2041 method in HEAD. Remove this method and its users.
2045 Description: Add asynchronous ldlm ENQUEUE completion handler.
2046 Details : CLIO posts ENQUEUE requests asynchronously through ptlrpcd---a
2047 case that stock ldlm_completion_ast() cannot handle as it waits
2048 until lock is granted. Introduce new ldlm_completion_ast_async()
2049 for this. Also comment ldlm_completion_ast().
2053 Description: ldlm_error <-> errno conversion.
2054 Details : Add functions to map (rather arbitrary) between LDLM error codes
2055 and standard errno values. CLIO needs this to prevent LDLM specific
2056 constants from escaping ldlm and osc.
2060 Description: Kill unused ldlm_handle2lock_ns() function.
2061 Details : Kill unused ldlm_handle2lock_ns() function.
2065 Description: Add lu_ref support to ldlm_lock
2066 Details : lu_ref support for ldlm_lock and ldlm_resource. See lu_ref patch.
2067 lu_ref fields ->l_reference and ->lr_reference are added to ldlm_lock
2068 and ldlm_resource. LDLM interface has to be changed, because code that
2069 releases a reference on a lock, has to "know" what reference this is.
2070 In the most frequent case
2072 lock = ldlm_handle2lock(handle);
2074 LDLM_LOCK_PUT(lock);
2076 no changes are required. When any other reference (received _not_ from
2077 ldlm_handle2lock()) is released, LDLM_LOCK_RELEASE() has to be called
2078 instead of LDLM_LOCK_PUT().
2080 Arguably, changes are pervasive, and interface requires some discipline
2081 for proper use. On the other hand, it was very instrumental in finding
2082 a few leaked lock references.
2086 Description: Add ldlm_lock_addref_try().
2087 Details : Introduce ldlm_lock_addref_try() function (used by CLIO) that
2088 attempts to addref a lock that might be being canceled
2093 Description: Add ldlm_weigh_callback().
2094 Details : Add new ->l_weigh_ast() call-back to ldlm_lock. It is called
2095 by ldlm_cancel_shrink_policy() to estimate lock "value", instead of
2096 hard-coded `number of pages' logic.
2100 Description: Add lockdep annotations to llog code.
2101 Details : Use appropriately tagged _nested() locking calls in the places
2102 where llog takes more than one ->lgh_lock lock.
2106 Description: Add loi_kms_set().
2107 Details : Wrap kms updates into a helper function.
2111 Description: Constify instances of struct lsm_operations.
2112 Details : Constify instances of struct lsm_operations.
2116 Description: lu_conf support.
2117 Details : On a server, a file system object is uniquely identified
2118 by a fid, which is sufficient to locate and load all object
2119 state (inode). On a client, on the other hand, more data are
2120 necessary instantiate an object. Change lu_object_find() and
2121 friends to take additional `lu_conf' argument describing object.
2122 Typically this includes layout information.
2126 Description: lu_context fixes.
2127 Details : Introduce new lu_context functions that are needed on the client
2128 side, where some system threads (ptlrpcd) are shared by multiple
2129 modules, and so cannot be stopped during module shutdown.
2133 Description: Add start and stop methods to lu_device_type_operations.
2134 Details : Introduce two new methods in lu_device_type_operations, that are
2135 invoked when first instance of a given type is created and last one
2136 is destroyed respectively. This is need by CLIO.
2140 Description: Add lu_ref support to struct lu_device.
2141 Details : Add lu_ref support to lu_object and lu_device. lu_ref is used to
2142 track leaked references.
2146 Description: Introduce lu_kmem_descr.
2147 Details : lu_kmem_descr and its companion interface allow to create
2148 and destroy a number of kmem caches at once.
2152 Description: Fix lu_object finalization race.
2153 Details : Fix a race between lu_object_find() finding an object and its
2154 concurrent finalization. This race is (most likely) not possible
2155 on the server, but might happen on the client.
2159 Description: Introduce lu_ref interface.
2160 Details : lu_ref is a debugging module allowing to track references to
2161 a given object. It is quite cpu expensive, and has to be
2162 explicitly enabled with --enable-lu_ref. See usage description
2167 Description: Factor lu_site procfs stats into a separate function.
2168 Details : Separate lu_site stats printing code into a separate function
2169 that can be reused on a client.
2173 Description: Constify instances of struct {lu,dt,md}_device_operations.
2174 Details : Constify instances of struct {lu,dt,md}_device_operations.
2178 Description: Introduce struct md_site and move meta-data specific parts of
2179 struct lu_site here.
2180 Details : Move md-specific fields out of struct lu_site into special struct
2181 md_site, so that lu_site can be used on a client.
2185 Description: Kill mdd_lov_destroy().
2186 Details : Remove unused mdd code.
2190 Description: Add st_block checking to multistat.c.
2191 Details : Add st_block checking to multistat.c.
2195 Description: Add lu_ref support to struct obd_device.
2196 Details : Add lu_ref tracking to obd_device.
2200 Description: Kill obd_set_fail_loc().
2201 Details : Remove unused code.
2205 Description: Add special type for ptlrpc_request interpret functions.
2206 Details : Add lu_env parameter to ->rq_interpreter call-back. NULL is passed
2207 there. Actual usage will be in CLIO.
2211 Description: Replace RW_LOCK_UNLOCKED() macro with rwlock_init().
2212 Details : Replace RW_LOCK_UNLOCKED() with rwlock_init() as the former
2213 doesn't work with lockdep.
2217 Description: Add rwv.c test program.
2218 Details : New testing program exercising readv(2) and writev(2) (Qian).
2222 Description: Add sendfile.c test program.
2223 Details : New testing program exercising sendfile(2) (Jay).
2227 Description: Ratelimit a message that can be very frequent.
2228 Details : Ratelimit a memory allocation failure message that can
2233 Description: Use cdebug_show() in CDEBUG-style macros defined outside of libcfs.
2234 Details : Use cdebug_show() in CDEBUG-style macros defined outside of libcfs.
2238 Description: Liblustre build fixes.
2239 Details : Liblustre build fixes.
2243 Description: libcfs: add cfs_{need,cond}_resched() interface.
2244 Details : libcfs: add cfs_{need,cond}_resched() definition and
2245 implementations for Linux, NT, and liblustre.
2247 Severity : enhancement
2249 Description: More exported tunables for mballoc
2250 Details : Add support for tunable preallocation window and new tunables for
2251 large/small requests
2255 Description: Detect corruption of block bitmap and checking for preallocations
2256 Details : Checks validity of on-disk block bitmap. Also it does better
2257 checking of number of applied preallocations. When corruption is
2258 found, it turns filesystem readonly to prevent further corruptions.
2262 Description: (rw.c:1323:ll_read_ahead_pages()) ASSERTION(page_idx > ria->ria_stoff) failed
2263 Details : Once the unmatched stride IO mode is detected, shrink the stride-ahead
2264 window to 0. If it does hit cache miss, and read-pattern is still
2265 stride-io mode, does not reset the stride window, but also does not
2266 increase the stride window length in this case.
2270 Frequency : only for big-endian servers
2271 Description: Check if system is big-endian while mounting fs with extents feature
2272 Details : Mounting a filesystem with extents feature will fail on big-endian
2273 systems since ext3-based ldiskfs is not supported on big-endian
2274 systems. This can be over-riden with "bigendian_extents" mount option.
2276 Severity : enhancement
2278 Description: The root squash functionality
2279 Details : A security feature, which is to prevent users from being able
2280 to mount lustre on their desktop, run as root, and delete
2281 all of the files in the filesystem. The goal is accomplished by
2282 remapping user id (UID) and group id (GID) of the root user to
2283 a UID and GID specified by the system administartor via Lustre
2284 configuration management server (MGS). The functionality also
2285 allows to specify sets of clients for which the remapping does
2290 Description: Excessive recovery window
2291 Details : With AT enabled, the recovery window can be excessively long (6000+
2292 seconds). To address this problem, we no longer use
2293 OBD_RECOVERY_FACTOR when extending the recovery window (the connect
2294 timeout no longer depends on the service time, it is set to
2295 INITIAL_CONNECT_TIMEOUT now) and clients report the old service
2296 time via pb_service_time.
2300 Description: Watchdog triggered on MDS failover
2301 Details : enable OBD_CONNECT_MDT flag when connecting from the MDS so that
2302 the OSTs know that the MDS "UUID" can be reused for the same export
2303 from a different NID, so we do not need to wait for the export to be
2307 Frequency : rare, only if using MMP with Linux RAID
2309 Description: MMP doesn't work with Linux RAID
2310 Details : While using HA for Lustre servers with Linux RAID, it is possible
2311 that MMP will not detect multiple mounts. To make this work we
2312 need to unplug the device queue in RAID when the MMP block is being
2313 written. Also while reading the MMP block, we should read it from
2314 disk and not the cached one.
2316 Severity : enhancement
2318 Description: open file using fid
2319 Details : A file can be opened using just its fid, like
2320 <mntpt>/.lustre/fid/SEQ:OID:VER - this is needed for HSM and replication
2323 Frequency : Only in RHEL5 when mounting multiple ext3 filesystems
2326 Description: "kmem_cache_create: duplicate cache jbd_4k" error message
2327 Details : add proper locking for creation of jbd_4k slab cache
2331 Description: MMP check in ext3_remount() fails without displaying any error
2332 Details : When multiple mount protection fails during remount, proper error
2335 Severity : enhancement
2337 Description: Allow stripe size to be up to 4G-64k
2338 Details : Fix math logic to allow large stripe sizes.
2342 Description: add check for >8TB ldiskfs filesystems
2343 Details : ext3-based ldiskfs does not support greater than 8TB LUNs.
2344 Don't allow >8TB ldiskfs filesystems to be mounted without
2345 force_over_8tb mount option
2350 Descriptoin: OSS complains "too many blocks" and crashes
2351 Details : In filter_commitrw_write():
2352 1. lquota_chkquota();
2353 2. obdo_from_inode();
2354 3. lquota_pending_commit();
2355 "2." has changed uid and gid in this case, then caused
2356 lquota_chkquota() and lquota_pending_commit() to use
2357 different uid and gid. That is the root of the bug.
2361 Descriptoin: getstripe doesn't report stripe count = -1 sanely
2362 Details : Detect and print out the 'stripe count = -1' case properly.
2366 Description: Out or order replies might be lost on replay
2367 Details : In ptlrpc_retain_replayable_request if we cannot find retained
2368 request with tid smaller then one currently being added, add it
2369 to the start, not end of the list.
2371 --------------------------------------------------------------------------------
2373 2007-08-10 Cluster File Systems, Inc. <info@clusterfs.com>
2375 * Support for kernels:
2376 2.6.5-7.283 (SLES 9),
2377 2.6.9-55.EL (RHEL 4),
2378 2.6.16.46-0.14 (SLES 10),
2379 2.6.18.8 vanilla (kernel.org)
2380 * Client support for unpatched kernels:
2381 (see http://wiki.lustre.org/index.php?title=Patchless_Client)
2382 2.6.16 - 2.6.22 vanilla (kernel.org)
2383 * Due to recently discovered recovery problems, we do not recommend
2384 using patchless RHEL 4 clients with this or any earlier release.
2385 * Recommended e2fsprogs version: 1.39.cfs8
2386 * Note that reiserfs quotas are disabled on SLES 10 in this kernel.
2387 * Starting with this release, the ldiskfs backing filesystem required
2388 by Lustre is now in its own package, lustre-ldiskfs. This package
2389 should be installed. It is versioned separately from Lustre and
2390 may be released separately in future.
2394 Description: block reactivating mgc import until all deactivates complete
2395 Details : Fix race when failing back MDT/MGS to itself (testing)
2398 Frequency : at statup only
2400 Description: mds_lov_synchronize race leads to various problems
2401 Details : simultaneous MDT->OST connections at startup can cause the
2402 sync to abort, leaving the OSC in a bad state.
2404 Severity : enhancement
2406 Description: add optional extra BUILD_VERSION info
2407 Details : add a new environment variable (namely LUSTRE_VERS) which allows
2408 to override the lustre version.
2411 Frequency : 2.6.18 servers only
2413 Description: ll_kern_mount() doesn't release the module reference
2414 Details : The ldiskfs module reference count never drops down to 0
2415 because ll_kern_mount() doesn't release the module reference.
2420 Description: server LBUG when using old ost_num_threads parameter
2421 Details : Accept the old ost_num_threads parameter but warn that it
2422 is deprecated, and fix an off-by-one error that caused an LBUG.
2427 Description: Transient SCSI error results in persistent IO issue
2428 Details : iobuf->dr_error is not reinitialized to 0 between two
2432 Frequency : sometimes when underlying device returns I/O errors
2434 Description: OSTs not going read-only during write failures
2435 Details : OSTs are not remounted read-only when the journal commit threads
2436 get I/O errors because fsfilt_ext3 calls journal_start/stop()
2437 instead of the ext3 wrappers.
2441 Description: poor connect scaling with increasing client count
2442 Details : Don't run filter_grant_sanity_check for more than 100 exports
2443 to improve scaling for large numbers of clients.
2446 Frequency : SLES10 only
2448 Description: sanity-quota.sh quotacheck failed: rc = -22
2449 Details : Quotas cannot be enabled on SLES10.
2452 Frequency : liblustre clients only
2454 Description: getdirentries does not give error when run on compute nodes
2455 Details : getdirentries does not fail when the size specified as an argument
2456 is too small to contain at least one entry
2458 Severity : enhancement
2460 Description: Add LNET router traceability for debug purposes
2461 Details : If a checksum failure occurs with a router as part of the
2462 IO path, the NID of the last router that forwarded the bulk data
2463 is printed so it can be identified.
2468 Description: OST "spontaneously" evicts client; client has imp_pingable == 0
2469 Details : Due to a race condition, liblustre clients were occasionally
2470 evicted incorrectly.
2472 Severity : enhancement
2474 Description: lfs setstripe use optional parameters instead of postional
2477 Severity : enhancement
2479 Description: Nanosecond timestamp support for ldiskfs
2480 Details : The on-disk ldiskfs filesystem has added support for nanosecond
2481 resolution timestamps. There is not yet support for this at
2482 the Lustre filesystem level.
2485 Frequency : during server recovery
2487 Description: MDS failing to send precreate requests due to OSCC_FLAG_RECOVERING
2488 Details : request with rq_no_resend flag not awake l_wait_event if they get
2492 Frequency : nfs export on patchless client
2494 Description: connectathon hang when test nfs export over patchless client
2495 Details : Disconnected dentry cannot be found with lookup, so we do not need
2496 to unhash it or make it invalid
2499 Description: fix llapi_lov_get_uuids() to allow many OSTs to be returned
2500 Details: : Change llapi_lov_get_uuids() to read the UUIDs from /proc instead
2501 of using an ioctl. This allows lfsck for > 160 OSTs to succeed.
2506 Description: open req refcounting wrong on reconnect
2507 Details : If reconnect happened between getting open reply from server and
2508 call to mdc_set_replay_data in ll_file_open, we will schedule
2509 replay for unreferenced request that we are about to free.
2510 Subsequent close will crash in variety of ways.
2511 Check that request is still eligible for replay in
2512 mdc_set_replay_data().
2517 Description: disable writes to filesystem when reading health_check file
2518 Details : the default for reading the health_check proc file has changed
2519 to NOT do a journal transaction and write to disk, because this
2520 can cause reads of the /proc file to hang and block HA state
2521 checking on a healthy but otherwise heavily loaded system. It
2522 is possible to return to the previous behaviour during configure
2523 with --enable-health-write.
2525 Severity : enhancement
2527 Description: 64-bit inode version
2528 Details: : Add a on-disk 64-bit inode version for ext3 to track changes made
2529 to the inode. This will be required for version-based recovery.
2534 Description: MDS fails to start if a duplicate client export is detected
2535 Details : in some rare cases it was possible for a client to connect to
2536 an MDS multiple times. Upon recovery the MDS would detect this
2537 and fail during startup. Handle this more gracefully.
2539 Severity : enhancement
2541 Description: Add -o localflock option to simulate old noflock
2543 Details : This will achieve local-only flock/fcntl locks
2549 Description: log_commit_thread vs filter_destroy race leads to crash
2550 Details : Take import reference before releasing llog record semaphore
2555 Description: Wrong request locking in request set processing
2556 Details : ptlrpc_check_set wrongly uses req->rq_lock for proctect add to
2557 imp_delayed_list, in this place should be used imp_lock.
2560 Frequency : when reconnection
2562 Description: Grant Leak when osc reconnect to OST
2563 Details : When osc reconnect ost, OST(filter) should check whether it
2564 should grant more space to client by comparing fed_grant and
2565 cl_avail_grant, and return the granted space to client instead
2566 of "new granted" space, because client will call osc_init_grant
2567 to update the client grant space info.
2570 Frequency : when client reconnect to OST
2572 Description: Grant Leak when osc do resend and replay bulk write
2573 Details : When osc reconnect to OST, OST(filter)should clear grant info of
2574 bulk write request, because the grant info while be sync between
2575 OSC and OST when reconnect, and we should ignore the grant info
2576 these of resend/replay write req.
2581 Description: Grant space more than avaiable left space sometimes.
2582 Details : When then OST is about to be full, if two bulk writing from
2583 different clients came to OST. Accord the avaliable space of the
2584 OST, the first req should be permitted, and the second one
2585 should be denied by ENOSPC. But if the seconde arrived before
2586 the first one is commited. The OST might wrongly permit second
2587 writing, which will cause grant space > avaiable space.
2590 Frequency : when client is evicted
2592 Description: Grant might be wrongly erased when osc is evicted by OST
2593 Details : when the import is evicted by server, it will fork another
2594 thread ptlrpc_invalidate_import_thread to invalidate the
2595 import, where the grant will be set to 0. While the original
2596 thread will update the grant it got when connecting. So if
2597 the former happened latter, the grant will be wrongly errased
2598 because of this race.
2603 Description: Checking Stale with correct fid
2604 Details : ll_revalidate_it should uses de_inode instead of op_data.fid2
2605 to check whether it is stale, because sometimes, we want the
2606 enqueue happened anyway, and op_data.fid2 will not be initialized.
2608 Severity : enhancement
2610 Description: update patchless client
2611 Details : Add support for patchless client with 2.6.20, 2.6.21 and RHEL 5
2614 Frequency : only with 2.4 kernel
2616 Description: random memory corruption
2617 Details : size of struct ll_inode_info is to big for union inode.u and this
2618 can be cause of random memory corruption.
2623 Description: Memory leak in recovery
2624 Details : Lov_mds_md was not free in an error handler in mds_create_object.
2625 It should also check obd_fail before fsfilt_start, otherwise if
2626 fsfilt_start return -EROFS,(failover mds during mds recovery).
2627 then the req will return with repmsg->transno = 0 and rc = EROFS.
2628 and we met hit the assert LASSERT(req->rq_reqmsg->transno ==
2629 req->rq_repmsg->transno) in ptlrpc_replay_interpret. Fcc should
2630 be freed no matter whether fsfilt_commit success or not.
2633 Frequency : only with huge count clients
2635 Description: Prevents from taking the superblock lock in llap_from_page for
2637 Details : using LL_ORIGIN_REMOVEPAGE origin flag instead of LL_ORIGIN_UNKNOW
2638 for llap_from_page call in ll_removepage prevents from taking the
2639 superblock lock for a soon died page.
2644 Description: Not check open intent error before release open handle
2645 Details : in some rare cases, the open intent error is not checked before
2646 release open handle, which may cause
2647 ASSERTION(open_req->rq_transno != 0), because it tries to release
2648 the failed open handle.
2653 Description: Set cat log bitmap only after create log success.
2654 Details : in some rare cases, the cat log bitmap is set too early. and it
2655 should be set only after create log success.
2659 Description: Accessing a block bevice can re-enable I/O when Lustre is
2660 tearing down a device.
2661 Details : dev_clear_rdonly(bdev) must be called in kill_bdev() instead of
2666 Description: service threads may hog cpus when there are a lot of requests
2667 Details : Insert cond_resched to give other threads a chance to use some CPU
2672 Description: the cat log was not initialized in recovery
2673 Details : When mds(mgs) do recovery, the tgt_count might be zero, so the
2674 unlink log on mds will not be initialized until mds post
2675 recovery. And also in mds post recovery, the unlink log will
2676 initialization will be done asynchronausly, so there will be race
2677 between add unlink log and unlink log initialization.
2681 Description: brw_stats were being printed incorrectly
2682 Details : brw_stats were being printed as log2 but all of them were not
2683 recorded as log2. Also remove some code duplication arising from
2684 filter_tally_{read,write}.
2688 Frequency : rare, only in recovery.
2689 Description: ASSERTION(req->rq_type != LI_POISON) failed
2690 Details : imp_lock should be held while iterating over imp_sending_list for
2691 prevent destroy request after get timeout in ptlrpc_queue_wait.
2695 Description: replay-single.sh test 52 fails
2696 Details : A lock's skiplist need to be cleanup when it being unlinked
2697 from its resource list.
2701 Description: Short directio read returns full requested size rather than
2703 Details : Direct I/O operations should return actual amount of bytes
2704 transferred rather than requested size.
2706 Severity : enhancement
2708 Description: metadata RPC reduction (e.g. for rm performance)
2709 Details : decrease the amount of synchronous RPC between clients and servers
2710 by canceling conflicing lock before the operation on the client
2711 and packing thier handles into the main operation RPC to server.
2713 Severity : enhancement
2715 Description: Async OSC create to avoid the blocking unnecessarily.
2716 Details : If a OST has no remain object, system will block on the creating
2717 when need to create a new object on this OST. Now, ways use
2718 pre-created objects when available, instead of blocking on an
2719 empty osc while others are not empty. If we must block, we block
2720 for the shortest possible period of time.
2724 Description: improve handling recoverable errors
2725 Details : if request processig with error which can be recoverable on server
2726 request should be resend, otherwise page released from cache and
2729 Severity : enhancement
2731 Description: refine locking for avoid write wrong info into lov_objid file
2732 Details : fix possible races with add new target and write/update data in
2735 --------------------------------------------------------------------------------
2737 2007-05-03 Cluster File Systems, Inc. <info@clusterfs.com>
2742 Frequency : on some architectures
2744 Description: 1.6 client sometimes fails to mount from a 1.4 MDT
2745 Details : Uninitialized flags sometimes cause configuration commands to
2749 Frequency : patchless clients only
2751 Description: missing __iget() symbol export
2752 Details : The __iget() symbol export is missing. To avoid the need for
2753 this on patchless clients the deathrow inode reaper is turned
2754 off, and we depend on the VM to clean up old inodes. This
2755 dependency was during via the fix for bug 12181.
2757 --------------------------------------------------------------------------------
2759 2007-04-19 Cluster File Systems, Inc. <info@clusterfs.com>
2761 * CONFIGURATION CHANGE. This version of Lustre WILL NOT
2762 INTEROPERATE with older versions automatically. In many cases a
2763 special upgrade step is needed. Please read the
2764 user documentation before upgrading any part of a live system.
2765 * WIRE PROTOCOL CHANGE from previous 1.6 beta versions. This
2766 version will not interoperate with 1.6 betas before beta5 (1.5.95).
2767 * WARNING: Lustre configuration and startup changes are required with
2768 this release. See https://mail.clusterfs.com/wikis/lustre/MountConf
2772 Severity : enhancement
2774 Description: MountConf
2775 Details : Lustre configuration is now managed via mkfs and mount
2776 commands instead of lmc and lconf. New obd types (MGS, MGC)
2777 are added for dynamic configuration management. See
2778 https://mail.clusterfs.com/wikis/lustre/MountConf for
2781 Severity : enhancement
2783 Description: dynamic OST addition
2784 Details : OSTs can now be added to a live filesystem
2786 Severity : enhancement
2788 Description: startup order invariance
2789 Details : MDTs and OSTs can be started in any order. Clients only
2790 require the MDT to complete startup.
2792 Severity : enhancement
2794 Description: parallel, asynchronous orphan cleanup
2795 Details : orphan cleanup is now performed in separate threads for each
2796 OST, allowing parallel non-blocking operation.
2798 Severity : enhancement
2800 Description: optimized stripe assignment
2801 Details : stripe assignments are now made based on ost space available,
2802 ost previous usage, and OSS previous usage, in order to try
2803 to optimize storage space and networking resources.
2805 Severity : enhancement
2807 Description: Permanently set tunables
2808 Details : All writable /proc/fs/lustre tunables can now be permanently
2809 set on a per-server basis, at mkfs time or on a live system.
2811 Severity : enhancement
2813 Description: Lustre message v2
2814 Details : Add lustre message format v2.
2816 Severity : enhancement
2818 Description: client OST exclusion list
2819 Details : Clients can be started with a list of OSTs that should be
2820 declared "inactive" for known non-responsive OSTs.
2824 Description: SPEC SFS validation failure on NFS v2 over lustre.
2825 Details : Changes the blocksize for regular files to be 2x RPC size,
2826 and not depend on stripe size.
2828 Severity : enhancement
2830 Description: Multiple MD RPCs in flight.
2831 Details : Further unserialise some read-only MDS RPCs - learn about intents.
2832 To avoid overly-overloading MDS, introduce a limit on number of
2833 MDS RPCs in flight for a single client and add /proc controls
2834 to adjust this limit.
2836 Severity : enhancement
2838 Description: client read/write statistics
2839 Details : Add client read/write call usage stats for performance
2840 analysis of user processes.
2841 /proc/fs/lustre/llite/*/offset_stats shows non-sequential
2842 file access. extents_stats shows chunk size distribution.
2843 extents_stats_per_process show chunk size distribution per
2846 Severity : enhancement
2848 Description: mds statistics
2849 Details : Add detailed mds operations statistics in
2850 /proc/fs/lustre/mds/*/stats.
2854 Description: Failure of copying files with lustre special EAs.
2855 Details : Client side always return success for setxattr call for lustre
2856 special xattr (currently only "trusted.lov").
2861 Description: Refcount LNET uuids
2862 Details : The global LNET uuid list grew linearly with every startup;
2863 refcount repeated list entries instead of always adding to
2866 Severity : enhancement
2868 Description: Dynamic service threads
2869 Details : Within a small range, start extra service threads
2870 automatically when the request queue builds up.
2873 Frequency : mixed-endian client/server environments
2875 Description: mixed-endian crashes
2876 Details : The new msg_v2 system had some failures in mixed-endian
2879 Severity : enhancement
2881 Description: Easy OST removal
2882 Details : OSTs can be permanently deactivated with e.g. 'lctl
2883 conf_param lustre-OST0001.osc.active=0'
2885 Severity : enhancement
2887 Description: MGS proc entries
2888 Details : Added basic proc entries for the MGS showing what filesystems
2891 Severity : enhancement
2893 Description: provide MGS failover
2894 Details : Added config lock reacquisition after MGS server failover.
2896 Severity : enhancement
2898 Description: add Linux 2.4 support
2899 Details : Added support for RHEL 2.4.21 kernel for 1.6 servers and clients
2903 Description: a large application tries to do I/O to the same resource and dies
2904 in the middle of it.
2905 Details : Check the req->rq_arrival time after the call to
2906 ost_brw_lock_get(), but before we do anything about
2907 processing it & sending the BULK transfer request. This
2908 should help move old stale pending locks off the queue as
2909 quickly as obd_timeout.
2912 Frequency : when an incorrect nid is specified during startup
2914 Description: ptlrpc connect to non-existant node causes kernel crash
2915 Details : LNET can't be re-entered from an event callback, which
2916 happened when we expire a message after the export has been
2917 cleaned up. Instead, hand the zombie cleanup off to another
2920 Severity : enhancement
2922 Description: plain/inodebits lock performance improvement
2923 Details : Grouping plain/inodebits in granted list by their request modes
2924 and bits policy, thus improving the performance of search through
2928 Frequency : only if OST filesystem is corrupted
2930 Description: client incorrectly hits assertion in ptlrpc_replay_req()
2931 Details : for a short time RPCs with bulk IO are in the replay list,
2932 but replay of bulk IOs is unimplemented. If the OST filesystem
2933 is corrupted due to disk cache incoherency and then replay is
2934 started it is possible to trip an assertion. Avoid putting
2935 committed RPCs into the replay list at all to avoid this issue.
2938 Frequency : liblustre (e.g. catamount) on a large cluster with >= 8 OSTs/OSS
2940 Description: System hang on startup
2941 Details : This bug allowed the liblustre (e.g. catamount) client to
2942 return to the app before handling all startup RPCs. This
2943 could leave the node unresponsive to lustre network traffic
2944 and manifested as a server ptllnd timeout.
2946 Severity : enhancement
2948 Description: Add "/proc/sys/lustre/debug_peer_on_timeout"
2949 Details : liblustre envirable: LIBLUSTRE_DEBUG_PEER_ON_TIMEOUT
2950 boolean to control whether to print peer debug info when a
2951 client's RPC times out.
2954 Frequency : only for kernels with patches from Lustre below 1.4.3
2956 Description: Remove old rdonly API
2957 Details : Remove old rdonly API which unused from at least lustre 1.4.3
2960 Frequency : only for devices with external journals
2962 Description: Set external device read-only also
2963 Details : During a commanded failover stop, we set the disk device
2964 read-only while the server shuts down. We now also set any
2965 external journal device read-only at the same time.
2968 Frequency : when upgrading from 1.4 while trying to change parameters
2970 Description: The wrong (new) MDC name was used when setting parameters for
2971 upgraded MDT's. Also allows changing of OSC (and MDC)
2972 parameters if --writeconf is specified at tunefs upgrade time.
2975 Frequency : when setting specific ost indicies
2977 Description: QOS code breaks on skipped indicies
2978 Details : Add checks for missing OST indicies in the QOS code, so OSTs
2979 created with --index need not be sequential.
2981 Severity : enhancement
2983 Description: Add uninit_groups feature to ldiskfs2 to speed up e2fsck
2984 Details : The uninit_groups feature works in conjunction with the kernel
2985 filesystem code (ldiskfs2 only) and e2fsprogs-1.39-cfs6 to speed
2986 up the pass1 processing of e2fsck. This is a read-only feature
2987 in ldiskfs2 only, so older kernels and current ldiskfs cannot
2988 mount filesystems that have had this feature enabled.
2990 Severity : enhancement
2992 Description: Improve multi-block allocation algorithm to avoid fragmentation
2993 Details : The mballoc3 code (ldiskfs2 only) adds new mechanisms to improve
2994 allocation locality and avoid filesystem fragmentation.
2996 ------------------------------------------------------------------------------
2998 2007-04-01 Cluster File Systems, Inc. <info@clusterfs.com>
3000 * Support for kernels:
3001 2.4.21-47.0.1.EL (RHEL 3)
3002 2.6.5-7.283 (SLES 9)
3003 2.6.9-42.0.10.EL (RHEL 4)
3004 2.6.12.6 vanilla (kernel.org)
3005 2.6.16.27-0.9 (SLES 10)
3006 * Recommended e2fsprogs version: 1.39.cfs5
3008 * Note that reiserfs quotas are disabled on SLES 10 in this kernel
3012 Frequency : occasional, depends on client load and configuration
3013 Bugzilla : 12181, 12203
3014 Description: data loss for recently-modified files
3016 Details : In some cases it is possible that recently written or created
3017 files may not be written to disk in a timely manner (this should
3018 normally be within 30s unless client IO load is very high).
3019 The problem appears as zero-length files or files that are a
3020 multiple of 1MB in size after a client crash or client eviction
3021 that are missing data at the end of the file.
3023 This problem is more likely to be hit on clients where files are
3024 repeatedly created and unlinked in the same directory, clients
3025 have a large amount of RAM, have many CPUs, the filesystem has
3026 many OSTs, the clients are rebooted frequently, and/or the files
3027 are not accessed by other nodes after being written.
3029 The presence of the problem can be detected by looking at
3030 /proc/sys/fs/inode-state. If the first number (nr_inodes) is
3031 smaller than the second (nr_unused) then dirty files will not
3032 be flushed automatically to disk. "sync; sleep 10" should be
3033 run several times on the node before unmounting it to update
3034 Lustre (this is also safe to run on nodes without this problem).
3036 There is also a related kernel bug in the RHEL4 4 2.6.9 kernel
3037 that can cause this same problem, so customers using that kernel
3038 also need to update the kernel in addition to Lustre. In order
3039 to properly fix this bug, the RHEL3 2.4.21 kernel is also updated.
3041 It is normal that files written just before a client crash (less
3042 than 30s) may not yet have been flushed to disk, even for local
3046 Frequency : frequent on thin XT3 nodes
3048 Description: UUID collision on thin XT3 Linux nodes
3049 Details : UUIDs on Compute Node Linux XT3 nodes were not generated
3050 randomly, since we relied on an insufficiently-seeded PRNG.
3055 Description: OSS hangs after "All ost request buffers busy"
3056 Details : A deadlock between quota and journal operations caused OSS
3057 hangs after printing "All ost request buffers busy."
3060 Frequency : always on liblustre builds
3062 Description: Cleanup compiler warnings on liblustre
3065 Frequency : always on liblustre builds on XT3
3067 Description: LC_CONFIG_CDEBUG don't run while build liblustre on XT3.
3071 Description: Addition of EXT3_FEATURE_RO_COMPAT_DIR_NLINKS flag for
3072 > 32000 subdirectories
3073 Details : Add EXT3_FEATURE_RO_COMPAT_DIR_NLINK flag to
3074 EXT3_FEATURE_RO_COMPAT_SUPP. This flag will be set whenever
3075 subdirectory count crosses 32000. This will aid e2fsck to
3076 correctly handle more than 32000 subdirectories.
3079 Frequency : liblustre (e.g. catamount) on a large cluster with >= 8 OSTs/OSS
3081 Description: System hang on startup
3082 Details : This bug allowed the liblustre (e.g. catamount) client to
3083 return to the app before handling all startup RPCs. This
3084 could leave the node unresponsive to lustre network traffic
3085 and manifested as a server ptllnd timeout.
3087 Severity : enhancement
3089 Description: Add "/proc/sys/lustre/debug_peer_on_timeout"
3090 (liblustre envirable: LIBLUSTRE_DEBUG_PEER_ON_TIMEOUT)
3091 boolean to control whether to print peer debug info when a
3092 client's RPC times out.
3097 Description: make O_SYNC working on 2.6 kernels
3098 Details : 2.6 kernels use different method for mark pages for write,
3099 so need add a code to lustre for O_SYNC work.
3104 Description: Failure to close file and release space on NFS
3105 Details : Put inode details into lock acquired in ll_intent_file_open.
3106 Use mdc_intent_lock in ll_intent_open to properly
3107 detect all kind of errors unhandled by mdc_enqueue.
3112 Description: proc file read during shutdown sometimes raced obd removal,
3114 Details : Add lock to prevent obd access after proc file removal.
3117 Frequency : Only for files larger than 4GB on 32-bit clients.
3119 Description: improperly doing page alignment of locks
3120 Details : Modify lustre core code to use CFS_PAGE_* defines instead of
3121 PAGE_*. Make CFS_PAGE_MASK a 64-bit mask.
3126 Description: RPCs being resent when they shouldn't be
3127 Details : Some RPCs that should not be resent are being resent. This
3128 can cause inconsistencies in the RPC state machine. Do not
3129 resend such requests.
3132 Frequency : rare, only with NFS export
3134 Description: Crash on NFS re-export node
3135 Details : under very unusual load conditions an assertion is hit in
3136 ll_intent_file_open()
3139 Frequency : only if OST filesystem is corrupted
3141 Description: client incorrectly hits assertion in ptlrpc_replay_req()
3142 Details : for a short time RPCs with bulk IO are in the replay list,
3143 but replay of bulk IOs is unimplemented. If the OST filesystem
3144 is corrupted due to disk cache incoherency and then replay is
3145 started it is possible to trip an assertion. Avoid putting
3146 committed RPCs into the replay list at all to avoid this issue.
3151 Description: large O_DIRECT requests fail under memory pressure/fragmentation
3152 Details : Large single O_DIRECT read and write calls can fail to allocate
3153 a sufficiently large buffer to process the request. In case of
3154 allocation failure the allocation is retried with a smaller
3155 buffer and broken into smaller requests.
3157 Severity : enhancement
3159 Description: Add -o localflock option to simulate old noflock behaviour.
3160 Details : This will achieve local-only flock/fcntl locks coherentness.
3165 Description: versioning check is incomplete
3166 Details : Checking the version difference of client vs. server, report
3167 error if the gap is too big.
3172 Description: add support PG_writeback bit
3173 Details : add support for PG_writeback bit for Lustre, for more carefull
3174 work with page cache in 2.6 kernel. This also fix some deadlocks
3175 and remove hack for work O_SYNC with 2.6 kernel.
3177 Severity : enhancement
3179 Description: Add uninit_groups feature to ldiskfs2 to speed up e2fsck
3180 Details : The uninit_groups feature works in conjunction with the kernel
3181 filesystem code (ldiskfs2 only) and e2fsprogs-1.39-cfs6 to speed
3182 up the pass1 processing of e2fsck. This is a read-only feature
3183 in ldiskfs2 only, so older kernels and current ldiskfs cannot
3184 mount filesystems that have had this feature enabled.
3186 Severity : enhancement
3188 Description: Improve multi-block allocation algorithm to avoid fragmentation
3189 Details : The mballoc3 code (ldiskfs2 only) adds new mechanisms to improve
3190 allocation locality and avoid filesystem fragmentation.
3192 ------------------------------------------------------------------------------
3194 2007-02-09 Cluster File Systems, Inc. <info@clusterfs.com>
3196 * Support for kernels:
3197 2.6.9-42.0.3.EL (RHEL 4)
3198 2.6.5-7.276 (SLES 9)
3199 2.4.21-47.0.1.EL (RHEL 3)
3200 2.6.12.6 vanilla (kernel.org)
3201 2.6.16.21-0.8 (SLES10)
3202 * Recommended e2fsprogs version: 1.39.cfs2-0
3204 * The backwards-compatible /proc/sys/portals symlink has been removed
3205 in this release. Before upgrading, please ensure that you change
3206 any configuration scripts or /etc/sysctl.conf files that access
3207 /proc/sys/portals/* or sysctl portals.* to use the corresponding
3208 entry in /proc/sys/lnet or sysctl lnet.*. This change can be made
3209 in advance of the upgrade on any system running Lustre 1.4.6 or
3210 newer, since /proc/sys/lnet was added in that version.
3211 * Note that reiserfs quotas are disabled on SLES 10 in this kernel
3215 Frequency : only when quota is used
3217 Description: avoid scanning export list for quota master
3218 Details : Change the algorithms to avoid scanning export list in order
3219 to improve the efficiency.
3222 Frequency : MDS failover only, very rarely
3224 Description: "went back in time" messages on mds failover
3225 Details : The greatest transno may be lost when the current operation
3226 finishes with an error (transno==0) and the client's last_rcvd
3227 record is over-written. Save the greatest transno in the
3228 mds_last_transno for this case.
3231 Frequency : always for specific kernels and striping counts
3233 Description: client may get "Matching packet too big" without ACL support
3234 Details : Clients compiled without CONFIG_FS_POSIX_ACL get an error message
3235 when trying to access files in certain configurations. The
3236 clients should in fact be denied when mounting because they do
3237 not understand ACLs.
3240 Frequency : Cray XT3 with more than 4000 clients and multiple jobs
3242 Description: many clients connecting with IO in progress causes connect timeouts
3243 Details : Avoid synchronous journal commits to avoid delays caused by many
3244 clients connecting/disconnecting when bulk IO is in progress.
3245 Queue liblustre connect requests on OST_REQUEST_PORTAL instead of
3246 OST_IO_PORTAL to avoid delays behind potentially many pending
3250 Frequency : occasionally with multiple writers to a single file
3252 Description: shared writes to file may result in wrong size reported by stat()
3253 Details : Allow growing of kms when extent lock is cancelled
3256 Frequency : always with random mmap IO to multi-striped file
3258 Description: mmap write might be lost if we are writing to a 'hole' in stripe
3259 Details : Only if the hole is at the end of OST object so that kms is too
3260 small. Fix is to increase kms accordingly in ll_nopage.
3263 Frequency : rare, only if OST filesystem is inconsistent with MDS filesystem
3265 Description: writes to a missing object would leak memory on the OST
3266 Details : If there is an inconsistency between the MDS and OST filesystems,
3267 such that the MDS references an object that doesn't exist, writes
3268 to that object will leak memory due to incorrect cleanup in the
3269 error handling path, eventually running out of memory on the OST.
3274 Description: Creating too long symlink causes lustre errors
3275 Details : Check symlink and name lengths before sending requests to MDS.
3278 Frequency : only if flock is enabled (not on by default)
3280 Description: posix locks not released on fd closure on 2.6.9+
3281 Details : We failed to add posix locks to list of inode locks on 2.6.9+
3282 kernels, this caused such locks not to be released on fd close and
3283 then assertions on fs unmount about still used locks.
3286 Frequency : MDS failover only, very rarely
3288 Description: clients may get ASSERTION(granted_lock != NULL)
3289 Details : When request was taking a long time, and a client was resending
3290 a getattr by name lock request. The were multiple lock requests
3291 with the same client lock handle and
3292 mds_getattr_name->fixup_handle_for_resent_request found one of the
3293 lock handles but later failed with ASSERTION(granted_lock != NULL).
3298 Description: handle->h_buffer_credits > 0, assertion failure
3299 Details : h_buffer_credits is zero after truncate, causing assertion
3300 failure. This patch extends the transaction or creates a new
3304 Frequency : NFS re-export or patchless client
3305 Bugzilla : 11179, 10796
3306 Description: Crash on NFS re-export node (__d_move)
3307 Details : We do not want to hash the dentry if we don't have a lock.
3308 But if this dentry is later used in d_move, we'd hit uninitialised
3309 list head d_hash, so we just do this to init d_hash field but
3310 leave dentry unhashed.
3313 Frequency : NFS re-export or patchless client
3315 Description: NFS exports has problem with symbolic link
3316 Details : lustre client didn't properly install dentry when re-exported
3317 to NFS or running patchless client.
3320 Frequency : NFS re-export or patchless client
3322 Description: Various nfs/patchless fixes.
3323 Details : fixes reuse disconected alias for lookup process - this fixes
3324 warning "find_exported_dentry: npd != pd",
3325 fix permission error with open files at nfs.
3326 fix apply umask when do revalidate.
3329 Frequency : occasional
3331 Description: Crash on NFS re-export node
3332 Details : calling clear_page() on the wrong pointer triggered oops in
3333 generic_mapping_read().
3336 Frequency : rarely, using O_DIRECT IO
3338 Description: unaligned directio crashes client with LASSERT
3339 Details : check for unaligned buffers before trying any requests.
3342 Frequency : rarely, using CFS RAID5 patches in non-standard kernel series
3344 Description: stale data returned from RAID cache
3345 Details : If only a small amount of IO is done to the RAID device before
3346 reading it again it is possible to get stale data from the RAID
3347 cache instead of reading it from disk.
3350 Frequency : always for sles10 kernel
3352 Description: sles10 support
3353 Details : ll_follow_link: compile fixes and using of nd_set_link
3354 under newer kernels.
3357 Frequency : depends on arch, kernel and compiler version, always on sles10
3360 Description: recursive or deep enough symlinks cause stack overflow
3361 Details : getting rid of large stack-allocated variable in
3365 Frequency : depends on hardware
3367 Description: lustre write performance loss in the SLES10 kernel
3368 Details : the performance loss is caused by using of write barriers in the
3369 ext3 code. The SLES10 kernel turns barrier support on by
3370 default. The fix is to undo that change for ldiskfs.
3372 ------------------------------------------------------------------------------
3374 2006-12-09 Cluster File Systems, Inc. <info@clusterfs.com>
3376 * Support for kernels:
3377 2.6.9-42.0.3EL (RHEL 4)
3378 2.6.5-7.276 (SLES 9)
3379 2.4.21-47.0.1.EL (RHEL 3)
3380 2.6.12.6 vanilla (kernel.org)
3384 Frequency : quota enabled and large files being deleted
3386 Description: releasing more than 4GB of quota at once hangs OST
3387 Details : If a user deletes more than 4GB of files on a single OST it
3388 will cause the OST to spin in an infinite loop. Release
3389 quota in < 4GB chunks, or use a 64-bit value for 1.4.7.1+.
3394 Description: statfs data retrieved from /proc may be stale or zero
3395 Details : When reading per-device statfs data from /proc, in the
3396 {kbytes,files}_{total,free,avail} files, it may appear
3397 as zero or be out of date.
3400 Frequency : systems with MD RAID1 external journal devices
3402 Description: lconf's call to blkid is confused by RAID1 journal devices
3403 Details : Use the "blkid -l" flag to locate the MD RAID device instead
3404 of returning all block devices that match the journal UUID.
3407 Frequency : always, for aggregate stripe size over 4GB
3409 Description: "lfs setstripe" fails assertion when setting 4GB+ stripe width
3410 Details : Using "lfs setstripe" to set stripe size * stripe count over 4GB
3411 will fail the kernel with "ASSERTION(lsm->lsm_xfersize != 0)"
3414 Frequency : always if "lfs find" used on a local file/directory
3416 Description: "lfs find" segfaults if used on a local file/directory
3417 Details : The case where a directory component was not specified wasn't
3418 handled correctly. Handle this properly.
3421 Frequency : always on ppc64
3423 Description: the write to an ext3 filesystem mounted with mballoc got stuck
3424 Details : ext3_mb_generate_buddy() uses find_next_bit() which does not
3425 perform endianness conversion.
3428 Frequency : rarely (truncate to non-zero file size after write under load)
3429 Bugzilla : 10730, 10687
3430 Description: Files padded with zeros to next 4K multiple
3431 Details : With filesystems mounted using the "extents" option (2.6 kernels)
3432 it is possible that files that are truncated to a non-zero size
3433 immediately after being written are filled with zero bytes beyond
3434 the truncated size. No file data is lost.
3436 Severity : enhancement
3438 Description: Allow recovery/failover for liblustre clients.
3439 Details : liblustre clients were unaware of failover configurations until
3442 Severity : enhancement
3444 Description: user file locks should fail when not mounting with flock option
3445 Details : Set up an error-returning stub in ll_file_operations.lock field
3446 to prevent incorrect behaviour when client is mounted without
3447 flock option. Also, set up properly f_op->flock field for
3451 Frequency : always on ia64
3453 Description: "lfs df" loops on printing out MDS statfs information
3454 Details : The obd_ioctl_data was not initialized and in some systems
3455 this caused a failure during the ioctl that did not return
3456 an error. Initialize the struct and return an error on failure.
3459 Frequency : SLES 9 only
3461 Description: Error of copying files with lustre special EAs as root
3462 Details : Client side always return success for setxattr call for lustre
3463 special xattr (currently only "trusted.lov").
3466 Frequency : rarely on clusters with both ia64+i386 clients
3468 Description: ia64+i686 clients doing shared IO on the same file may LBUG
3469 Details : In rare cases when both ia64+i686 (or other mixed-PAGE_SIZE)
3470 clients are doing concurrent writes to the same file it is
3471 possible that the ia64 clients may LASSERT because the OST
3472 extent locks are not PAGE_SIZE aligned. Ensure that grown
3473 locks are always aligned on the request boundary.
3476 Frequency : specific use, occasional
3478 Description: Overwriting in use executable truncates on-disk binary image
3479 Details : If one node attempts to overwrite an executable in use by
3480 another node, we now correctly return ETXTBSY instead of
3481 truncating the file.
3483 Severity : enhancement
3485 Description: Async OSC create to avoid the blocking unnecessarily.
3486 Details : If a OST has no remain object, system will block on the creating
3487 when need to create a new object on this OST. Now, ways use
3488 pre-created objects when available, instead of blocking on an
3489 empty osc while others are not empty. If we must block, we block
3490 for the shortest possible period of time.
3495 Description: chmod on Lustre root is propagated to other clients
3496 Details : Re-validate root's dentry in ll_lookup_it to avoid having it
3497 invalid by the follow_mount time.
3500 Frequency : liblustre clients only
3502 Description: Race in 'instant cancel' lock handling could lead to such locks
3503 never to be granted in case of SMP MDS
3504 Details : Do not destroy not yet granted but cbpending locks in
3508 Frequency : replay/resend of open
3510 Description: non null lock assetion failure in mds_intent_policy
3511 Details : Trying to replay/resend lockless open requests resulted in
3512 mds_open() returning 0 with no lock. Now it sets a flag if
3513 a lock is going to be returned.
3515 Severity : enhancement
3517 Description: Checksum enhancements
3518 Details : New checksum enhancements allow for resending RPCs that failed
3521 Severity : enhancement
3523 Description: Tunables on number of dirty pages in cacche
3524 Details : Allow to set limit on number of dirty pages cached.
3529 Description: client crash on unmount - lock still has references
3530 Details : In some error handling cases it was possible to leak a lock
3531 reference on a client while accessing a file. This was not
3532 harmful to the client during operation, but would cause the
3533 client to crash when the filesystem is unmounted.
3536 Frequency : specific case, rare
3538 Description: ETXTBSY on mds though file not in use by client
3539 Details : ETXTBSY is no longer incorrectly returned when attempting to
3540 chmod or chown a directory that the user previously tried to
3541 execute or a currently-executing binary.
3544 Frequency : extremely rare except on liblustre-based clients
3546 Description: Lustre space not freed when files are deleted
3547 Details : Clean up open-unlinked files after client eviction. Previously
3548 the unlink was skipped and the files remained as orphans.
git://git.whamcloud.com / fs / lustre-release.git / blob