1 tbd Cluster File Systems, Inc. <info@clusterfs.com>
6 2.6.16.46-0.14 (SLES 10)
7 2.6.18.8 vanilla (kernel.org)
8 * Client support for unpatched kernels:
9 (see http://wiki.lustre.org/index.php?title=Patchless_Client)
10 2.6.9-42.0.10.EL (RHEL 4)
11 2.6.16 - 2.6.21 vanilla (kernel.org)
12 * Recommended e2fsprogs version: 1.39.cfs8
13 * Note that reiserfs quotas are disabled on SLES 10 in this kernel.
17 Description: don't use GFP_* in generic Lustre code.
18 Details : Use cfs_alloc_* functions and CFS_* flags for code portability.
22 Description: obdclass is limited by single OBD_ALLOC(idarray)
23 Details : replace OBD_ALLOC/OBD_FREE with OBD_VMALLOC/OBD_VFREE
27 Description: warnings with build patchless client with vanila 2.6.19 and up
28 Details : change old ctl_table style and replace ctl_table/ctl_table_header
29 with cfs_sysctl_table_t/cfs_sysctl_table_header_t
33 Frequency : Only for SLES
34 Description: sanity_quota fail test_1
35 Details : There are multiple occurences of $TSTUSR in SLES's /etc/group
36 file, which makes TSTID[2] inunique.
40 Frequency : Only for SLES9
41 Description: Kernel patches for SLES9 2.6.5-7.286 kernel
42 Details : Update target/ChangeLog/which_patch .
44 --------------------------------------------------------------------------------
46 2007-08-10 Cluster File Systems, Inc. <info@clusterfs.com>
48 * Support for kernels:
51 2.6.16.46-0.14 (SLES 10)
52 2.6.18.8 vanilla (kernel.org)
53 * Client support for unpatched kernels:
54 (see http://wiki.lustre.org/index.php?title=Patchless_Client)
55 2.6.16 - 2.6.22 vanilla (kernel.org)
56 * Due to recently discovered recovery problems, we do not recommend
57 using patchless RHEL 4 clients with this or any earlier release.
58 * Recommended e2fsprogs version: 1.39.cfs8
59 * Note that reiserfs quotas are disabled on SLES 10 in this kernel.
60 * Starting with this release, the ldiskfs backing filesystem required
61 by Lustre is now in its own package, lustre-ldiskfs. This package
62 should be installed. It is versioned separately from Lustre and
63 may be released separately in future.
65 Severity : enhancement
67 Description: add optional extra BUILD_VERSION info
68 Details : add a new environment variable (namely LUSTRE_VERS) which allows
69 to override the lustre version.
72 Frequency : 2.6.18 servers only
74 Description: ll_kern_mount() doesn't release the module reference
75 Details : The ldiskfs module reference count never drops down to 0
76 because ll_kern_mount() doesn't release the module reference.
81 Description: server LBUG when using old ost_num_threads parameter
82 Details : Accept the old ost_num_threads parameter but warn that it
83 is deprecated, and fix an off-by-one error that caused an LBUG.
88 Description: Transient SCSI error results in persistent IO issue
89 Details : iobuf->dr_error is not reinitialized to 0 between two
93 Frequency : sometimes when underlying device returns I/O errors
95 Description: OSTs not going read-only during write failures
96 Details : OSTs are not remounted read-only when the journal commit threads
97 get I/O errors because fsfilt_ext3 calls journal_start/stop()
98 instead of the ext3 wrappers.
102 Description: poor connect scaling with increasing client count
103 Details : Don't run filter_grant_sanity_check for more than 100 exports
104 to improve scaling for large numbers of clients.
107 Frequency : SLES10 only
109 Description: sanity-quota.sh quotacheck failed: rc = -22
110 Details : Quotas cannot be enabled on SLES10.
113 Frequency : liblustre clients only
115 Description: getdirentries does not give error when run on compute nodes
116 Details : getdirentries does not fail when the size specified as an argument
117 is too small to contain at least one entry
119 Severity : enhancement
121 Description: Add LNET router traceability for debug purposes
122 Details : If a checksum failure occurs with a router as part of the
123 IO path, the NID of the last router that forwarded the bulk data
124 is printed so it can be identified.
129 Description: OST "spontaneously" evicts client; client has imp_pingable == 0
130 Details : Due to a race condition, liblustre clients were occasionally
133 Severity : enhancement
135 Description: lfs setstripe use optional parameters instead of postional
138 Severity : enhancement
140 Description: Nanosecond timestamp support for ldiskfs
141 Details : The on-disk ldiskfs filesystem has added support for nanosecond
142 resolution timestamps. There is not yet support for this at
143 the Lustre filesystem level.
146 Frequency : during server recovery
148 Description: MDS failing to send precreate requests due to OSCC_FLAG_RECOVERING
149 Details : request with rq_no_resend flag not awake l_wait_event if they get a
153 Frequency : nfs export on patchless client
155 Description: connectathon hang when test nfs export over patchless client
156 Details : Disconnected dentry cannot be found with lookup, so we do not need
157 to unhash it or make it invalid
160 Description: fix llapi_lov_get_uuids() to allow many OSTs to be returned
161 Details: : Change llapi_lov_get_uuids() to read the UUIDs from /proc instead
162 of using an ioctl. This allows lfsck for > 160 OSTs to succeed.
167 Description: open req refcounting wrong on reconnect
168 Details : If reconnect happened between getting open reply from server and
169 call to mdc_set_replay_data in ll_file_open, we will schedule
170 replay for unreferenced request that we are about to free.
171 Subsequent close will crash in variety of ways.
172 Check that request is still eligible for replay in
173 mdc_set_replay_data().
178 Description: disable writes to filesystem when reading health_check file
179 Details : the default for reading the health_check proc file has changed
180 to NOT do a journal transaction and write to disk, because this
181 can cause reads of the /proc file to hang and block HA state
182 checking on a healthy but otherwise heavily loaded system. It
183 is possible to return to the previous behaviour during configure
184 with --enable-health-write.
186 Severity : enhancement
188 Description: 64-bit inode version
189 Details: : Add a on-disk 64-bit inode version for ext3 to track changes made
190 to the inode. This will be required for version-based recovery.
195 Description: MDS fails to start if a duplicate client export is detected
196 Details : in some rare cases it was possible for a client to connect to
197 an MDS multiple times. Upon recovery the MDS would detect this
198 and fail during startup. Handle this more gracefully.
200 Severity : enhancement
202 Description: Add -o localflock option to simulate old noflock
204 Details : This will achieve local-only flock/fcntl locks
210 Description: log_commit_thread vs filter_destroy race leads to crash
211 Details : Take import reference before releasing llog record semaphore
216 Description: Wrong request locking in request set processing
217 Details : ptlrpc_check_set wrongly uses req->rq_lock for proctect add to
218 imp_delayed_list, in this place should be used imp_lock.
221 Frequency : when reconnection
223 Description: Grant Leak when osc reconnect to OST
224 Details : When osc reconnect ost, OST(filter) should check whether it
225 should grant more space to client by comparing fed_grant and
226 cl_avail_grant, and return the granted space to client instead
227 of "new granted" space, because client will call osc_init_grant
228 to update the client grant space info.
231 Frequency : when client reconnect to OST
233 Description: Grant Leak when osc do resend and replay bulk write
234 Details : When osc reconnect to OST, OST(filter)should clear grant info of
235 bulk write request, because the grant info while be sync between
236 OSC and OST when reconnect, and we should ignore the grant info
237 these of resend/replay write req.
242 Description: Grant space more than avaiable left space sometimes.
243 Details : When then OST is about to be full, if two bulk writing from
244 different clients came to OST. Accord the avaliable space of the
245 OST, the first req should be permitted, and the second one
246 should be denied by ENOSPC. But if the seconde arrived before
247 the first one is commited. The OST might wrongly permit second
248 writing, which will cause grant space > avaiable space.
251 Frequency : when client is evicted
253 Description: Grant might be wrongly erased when osc is evicted by OST
254 Details : when the import is evicted by server, it will fork another
255 thread ptlrpc_invalidate_import_thread to invalidate the
256 import, where the grant will be set to 0. While the original
257 thread will update the grant it got when connecting. So if
258 the former happened latter, the grant will be wrongly errased
259 because of this race.
264 Description: Checking Stale with correct fid
265 Details : ll_revalidate_it should uses de_inode instead of op_data.fid2
266 to check whether it is stale, because sometimes, we want the
267 enqueue happened anyway, and op_data.fid2 will not be initialized.
269 Severity : enhancement
271 Description: update patchless client
272 Details : Add support for patchless client with 2.6.20, 2.6.21 and RHEL 5
275 Frequency : only with 2.4 kernel
277 Description: random memory corruption
278 Details : size of struct ll_inode_info is to big for union inode.u and this
279 can be cause of random memory corruption.
284 Description: Memory leak in recovery
285 Details : Lov_mds_md was not free in an error handler in mds_create_object.
286 It should also check obd_fail before fsfilt_start, otherwise if
287 fsfilt_start return -EROFS,(failover mds during mds recovery).
288 then the req will return with repmsg->transno = 0 and rc = EROFS.
289 and we met hit the assert LASSERT(req->rq_reqmsg->transno ==
290 req->rq_repmsg->transno) in ptlrpc_replay_interpret. Fcc should
291 be freed no matter whether fsfilt_commit success or not.
294 Frequency : only with huge count clients
296 Description: Prevents from taking the superblock lock in llap_from_page for
298 Details : using LL_ORIGIN_REMOVEPAGE origin flag instead of LL_ORIGIN_UNKNOW
299 for llap_from_page call in ll_removepage prevents from taking the
300 superblock lock for a soon died page.
305 Description: Not check open intent error before release open handle
306 Details : in some rare cases, the open intent error is not checked before
307 release open handle, which may cause
308 ASSERTION(open_req->rq_transno != 0), because it tries to release
309 the failed open handle.
314 Description: Set cat log bitmap only after create log success.
315 Details : in some rare cases, the cat log bitmap is set too early. and it
316 should be set only after create log success.
320 Description: Accessing a block bevice can re-enable I/O when Lustre is
321 tearing down a device.
322 Details : dev_clear_rdonly(bdev) must be called in kill_bdev() instead of
327 Description: service threads may hog cpus when there are a lot of requests
329 Details : Insert cond_resched to give other threads a chance to use some of
335 Description: the cat log was not initialized in recovery
336 Details : When mds(mgs) do recovery, the tgt_count might be zero, so the
337 unlink log on mds will not be initialized until mds post
338 recovery. And also in mds post recovery, the unlink log will
339 initialization will be done asynchronausly, so there will be race
340 between add unlink log and unlink log initialization.
344 Description: brw_stats were being printed incorrectly
345 Details : brw_stats were being printed as log2 but all of them were not
346 recorded as log2. Also remove some code duplication arising from
347 filter_tally_{read,write}.
351 Frequency : rare, only in recovery.
352 Description: ASSERTION(req->rq_type != LI_POISON) failed
353 Details : imp_lock should be held while iterating over imp_sending_list for
354 prevent destroy request after get timeout in ptlrpc_queue_wait.
358 Description: replay-single.sh test 52 fails
359 Details : A lock's skiplist need to be cleanup when it being unlinked
360 from its resource list.
364 Description: Short directio read returns full requested size rather than
366 Details : Direct I/O operations should return actual amount of bytes
367 transferred rather than requested size.
369 Severity : enhancement
371 Description: metadata RPC reduction (e.g. for rm performance)
372 Details : decrease the amount of synchronous RPC between clients and servers
373 by canceling conflicing lock before the operation on the client side
374 and packing thier handles into the main operation RPC to server.
376 --------------------------------------------------------------------------------
378 2007-05-03 Cluster File Systems, Inc. <info@clusterfs.com>
383 Frequency : on some architectures
385 Description: 1.6 client sometimes fails to mount from a 1.4 MDT
386 Details : Uninitialized flags sometimes cause configuration commands to
390 Frequency : patchless clients only
392 Description: missing __iget() symbol export
393 Details : The __iget() symbol export is missing. To avoid the need for
394 this on patchless clients the deathrow inode reaper is turned
395 off, and we depend on the VM to clean up old inodes. This
396 dependency was during via the fix for bug 12181.
398 --------------------------------------------------------------------------------
400 2007-04-19 Cluster File Systems, Inc. <info@clusterfs.com>
402 * CONFIGURATION CHANGE. This version of Lustre WILL NOT
403 INTEROPERATE with older versions automatically. In many cases a
404 special upgrade step is needed. Please read the
405 user documentation before upgrading any part of a live system.
406 * WIRE PROTOCOL CHANGE from previous 1.6 beta versions. This
407 version will not interoperate with 1.6 betas before beta5 (1.5.95).
408 * WARNING: Lustre configuration and startup changes are required with
409 this release. See https://mail.clusterfs.com/wikis/lustre/MountConf
414 Severity : enhancement
416 Description: MountConf
417 Details : Lustre configuration is now managed via mkfs and mount
418 commands instead of lmc and lconf. New obd types (MGS, MGC)
419 are added for dynamic configuration management. See
420 https://mail.clusterfs.com/wikis/lustre/MountConf for
423 Severity : enhancement
425 Description: dynamic OST addition
426 Details : OSTs can now be added to a live filesystem
428 Severity : enhancement
430 Description: startup order invariance
431 Details : MDTs and OSTs can be started in any order. Clients only
432 require the MDT to complete startup.
434 Severity : enhancement
436 Description: parallel, asynchronous orphan cleanup
437 Details : orphan cleanup is now performed in separate threads for each
438 OST, allowing parallel non-blocking operation.
440 Severity : enhancement
442 Description: optimized stripe assignment
443 Details : stripe assignments are now made based on ost space available,
444 ost previous usage, and OSS previous usage, in order to try
445 to optimize storage space and networking resources.
447 Severity : enhancement
449 Description: Permanently set tunables
450 Details : All writable /proc/fs/lustre tunables can now be permanently
451 set on a per-server basis, at mkfs time or on a live
454 Severity : enhancement
456 Description: Lustre message v2
457 Details : Add lustre message format v2.
459 Severity : enhancement
461 Description: client OST exclusion list
462 Details : Clients can be started with a list of OSTs that should be
463 declared "inactive" for known non-responsive OSTs.
467 Description: SPEC SFS validation failure on NFS v2 over lustre.
468 Details : Changes the blocksize for regular files to be 2x RPC size,
469 and not depend on stripe size.
471 Severity : enhancement
473 Description: Multiple MD RPCs in flight.
474 Details : Further unserialise some read-only MDS RPCs - learn about intents.
475 To avoid overly-overloading MDS, introduce a limit on number of
476 MDS RPCs in flight for a single client and add /proc controls
477 to adjust this limit.
479 Severity : enhancement
481 Description: client read/write statistics
482 Details : Add client read/write call usage stats for performance
483 analysis of user processes.
484 /proc/fs/lustre/llite/*/offset_stats shows non-sequential
485 file access. extents_stats shows chunk size distribution.
486 extents_stats_per_process show chunk size distribution per
489 Severity : enhancement
491 Description: mds statistics
492 Details : Add detailed mds operations statistics in
493 /proc/fs/lustre/mds/*/stats.
497 Description: Failure of copying files with lustre special EAs.
498 Details : Client side always return success for setxattr call for lustre
499 special xattr (currently only "trusted.lov").
504 Description: Refcount LNET uuids
505 Details : The global LNET uuid list grew linearly with every startup;
506 refcount repeated list entries instead of always adding to
509 Severity : enhancement
511 Description: Dynamic service threads
512 Details : Within a small range, start extra service threads
513 automatically when the request queue builds up.
516 Frequency : mixed-endian client/server environments
518 Description: mixed-endian crashes
519 Details : The new msg_v2 system had some failures in mixed-endian
522 Severity : enhancement
524 Description: Easy OST removal
525 Details : OSTs can be permanently deactivated with e.g. 'lctl
526 conf_param lustre-OST0001.osc.active=0'
528 Severity : enhancement
530 Description: MGS proc entries
531 Details : Added basic proc entries for the MGS showing what filesystems
534 Severity : enhancement
536 Description: provide MGS failover
537 Details : Added config lock reacquisition after MGS server failover.
539 Severity : enhancement
541 Description: add Linux 2.4 support
542 Details : Added support for RHEL 2.4.21 kernel for 1.6 servers and clients
546 Description: a large application tries to do I/O to the same resource and dies
548 Details : Check the req->rq_arrival time after the call to
549 ost_brw_lock_get(), but before we do anything about
550 processing it & sending the BULK transfer request. This
551 should help move old stale pending locks off the queue as
552 quickly as obd_timeout.
555 Frequency : when an incorrect nid is specified during startup
557 Description: ptlrpc connect to non-existant node causes kernel crash
558 Details : LNET can't be re-entered from an event callback, which
559 happened when we expire a message after the export has been
560 cleaned up. Instead, hand the zombie cleanup off to another
563 Severity : enhancement
565 Description: plain/inodebits lock performance improvement
566 Details : Grouping plain/inodebits in granted list by their request modes
567 and bits policy, thus improving the performance of search through
571 Frequency : only if OST filesystem is corrupted
573 Description: client incorrectly hits assertion in ptlrpc_replay_req()
574 Details : for a short time RPCs with bulk IO are in the replay list,
575 but replay of bulk IOs is unimplemented. If the OST filesystem
576 is corrupted due to disk cache incoherency and then replay is
577 started it is possible to trip an assertion. Avoid putting
578 committed RPCs into the replay list at all to avoid this issue.
581 Frequency : liblustre (e.g. catamount) on a large cluster with >= 8 OSTs/OSS
583 Description: System hang on startup
584 Details : This bug allowed the liblustre (e.g. catamount) client to
585 return to the app before handling all startup RPCs. This
586 could leave the node unresponsive to lustre network traffic
587 and manifested as a server ptllnd timeout.
589 Severity : enhancement
591 Description: Add "/proc/sys/lustre/debug_peer_on_timeout"
592 Details : liblustre envirable: LIBLUSTRE_DEBUG_PEER_ON_TIMEOUT
593 boolean to control whether to print peer debug info when a
594 client's RPC times out.
597 Frequency : only for kernels with patches from Lustre below 1.4.3
599 Description: Remove old rdonly API
600 Details : Remove old rdonly API which unused from at least lustre 1.4.3
603 Frequency : only for devices with external journals
605 Description: Set external device read-only also
606 Details : During a commanded failover stop, we set the disk device
607 read-only while the server shuts down. We now also set any
608 external journal device read-only at the same time.
611 Frequency : when upgrading from 1.4 while trying to change parameters
613 Description: The wrong (new) MDC name was used when setting parameters for
614 upgraded MDT's. Also allows changing of OSC (and MDC)
615 parameters if --writeconf is specified at tunefs upgrade time.
618 Frequency : when setting specific ost indicies
620 Description: QOS code breaks on skipped indicies
621 Details : Add checks for missing OST indicies in the QOS code, so OSTs
622 created with --index need not be sequential.
624 Severity : enhancement
626 Description: Add uninit_groups feature to ldiskfs2 to speed up e2fsck
627 Details : The uninit_groups feature works in conjunction with the kernel
628 filesystem code (ldiskfs2 only) and e2fsprogs-1.39-cfs6 to speed
629 up the pass1 processing of e2fsck. This is a read-only feature
630 in ldiskfs2 only, so older kernels and current ldiskfs cannot
631 mount filesystems that have had this feature enabled.
633 Severity : enhancement
635 Description: Improve multi-block allocation algorithm to avoid fragmentation
636 Details : The mballoc3 code (ldiskfs2 only) adds new mechanisms to improve
637 allocation locality and avoid filesystem fragmentation.
639 ------------------------------------------------------------------------------
641 2007-04-01 Cluster File Systems, Inc. <info@clusterfs.com>
643 * Support for kernels:
644 2.4.21-47.0.1.EL (RHEL 3)
646 2.6.9-42.0.10.EL (RHEL 4)
647 2.6.12.6 vanilla (kernel.org)
648 2.6.16.27-0.9 (SLES 10)
649 * Recommended e2fsprogs version: 1.39.cfs5
651 * Note that reiserfs quotas are disabled on SLES 10 in this kernel
655 Frequency : occasional, depends on client load and configuration
656 Bugzilla : 12181, 12203
657 Description: data loss for recently-modified files
659 Details : In some cases it is possible that recently written or created
660 files may not be written to disk in a timely manner (this should
661 normally be within 30s unless client IO load is very high).
662 The problem appears as zero-length files or files that are a
663 multiple of 1MB in size after a client crash or client eviction
664 that are missing data at the end of the file.
666 This problem is more likely to be hit on clients where files are
667 repeatedly created and unlinked in the same directory, clients
668 have a large amount of RAM, have many CPUs, the filesystem has
669 many OSTs, the clients are rebooted frequently, and/or the files
670 are not accessed by other nodes after being written.
672 The presence of the problem can be detected by looking at
673 /proc/sys/fs/inode-state. If the first number (nr_inodes) is
674 smaller than the second (nr_unused) then dirty files will not
675 be flushed automatically to disk. "sync; sleep 10" should be
676 run several times on the node before unmounting it to update
677 Lustre (this is also safe to run on nodes without this problem).
679 There is also a related kernel bug in the RHEL4 4 2.6.9 kernel
680 that can cause this same problem, so customers using that kernel
681 also need to update the kernel in addition to Lustre. In order
682 to properly fix this bug, the RHEL3 2.4.21 kernel is also updated.
684 It is normal that files written just before a client crash (less
685 than 30s) may not yet have been flushed to disk, even for local
689 Frequency : frequent on thin XT3 nodes
691 Description: UUID collision on thin XT3 Linux nodes
692 Details : UUIDs on Compute Node Linux XT3 nodes were not generated
693 randomly, since we relied on an insufficiently-seeded PRNG.
698 Description: OSS hangs after "All ost request buffers busy"
699 Details : A deadlock between quota and journal operations caused OSS
700 hangs after printing "All ost request buffers busy."
703 Frequency : always on liblustre builds
705 Description: Cleanup compiler warnings on liblustre
708 Frequency : always on liblustre builds on XT3
710 Description: LC_CONFIG_CDEBUG don't run while build liblustre on XT3.
714 Description: Addition of EXT3_FEATURE_RO_COMPAT_DIR_NLINKS flag for
715 > 32000 subdirectories
716 Details : Add EXT3_FEATURE_RO_COMPAT_DIR_NLINK flag to
717 EXT3_FEATURE_RO_COMPAT_SUPP. This flag will be set whenever
718 subdirectory count crosses 32000. This will aid e2fsck to
719 correctly handle more than 32000 subdirectories.
722 Frequency : liblustre (e.g. catamount) on a large cluster with >= 8 OSTs/OSS
724 Description: System hang on startup
725 Details : This bug allowed the liblustre (e.g. catamount) client to
726 return to the app before handling all startup RPCs. This
727 could leave the node unresponsive to lustre network traffic
728 and manifested as a server ptllnd timeout.
730 Severity : enhancement
732 Description: Add "/proc/sys/lustre/debug_peer_on_timeout"
733 (liblustre envirable: LIBLUSTRE_DEBUG_PEER_ON_TIMEOUT)
734 boolean to control whether to print peer debug info when a
735 client's RPC times out.
740 Description: make O_SYNC working on 2.6 kernels
741 Details : 2.6 kernels use different method for mark pages for write,
742 so need add a code to lustre for O_SYNC work.
747 Description: Failure to close file and release space on NFS
748 Details : Put inode details into lock acquired in ll_intent_file_open.
749 Use mdc_intent_lock in ll_intent_open to properly
750 detect all kind of errors unhandled by mdc_enqueue.
755 Description: proc file read during shutdown sometimes raced obd removal,
757 Details : Add lock to prevent obd access after proc file removal.
760 Frequency : Only for files larger than 4GB on 32-bit clients.
762 Description: improperly doing page alignment of locks
763 Details : Modify lustre core code to use CFS_PAGE_* defines instead of
764 PAGE_*. Make CFS_PAGE_MASK a 64-bit mask.
769 Description: RPCs being resent when they shouldn't be
770 Details : Some RPCs that should not be resent are being resent. This
771 can cause inconsistencies in the RPC state machine. Do not
772 resend such requests.
775 Frequency : rare, only with NFS export
777 Description: Crash on NFS re-export node
778 Details : under very unusual load conditions an assertion is hit in
779 ll_intent_file_open()
782 Frequency : only if OST filesystem is corrupted
784 Description: client incorrectly hits assertion in ptlrpc_replay_req()
785 Details : for a short time RPCs with bulk IO are in the replay list,
786 but replay of bulk IOs is unimplemented. If the OST filesystem
787 is corrupted due to disk cache incoherency and then replay is
788 started it is possible to trip an assertion. Avoid putting
789 committed RPCs into the replay list at all to avoid this issue.
794 Description: large O_DIRECT requests fail under memory pressure/fragmentation
795 Details : Large single O_DIRECT read and write calls can fail to allocate
796 a sufficiently large buffer to process the request. In case of
797 allocation failure the allocation is retried with a smaller
798 buffer and broken into smaller requests.
800 Severity : enhancement
802 Description: Add -o localflock option to simulate old noflock behaviour.
803 Details : This will achieve local-only flock/fcntl locks coherentness.
808 Description: versioning check is incomplete
809 Details : Checking the version difference of client vs. server, report
810 error if the gap is too big.
815 Description: add support PG_writeback bit
816 Details : add support for PG_writeback bit for Lustre, for more carefull
817 work with page cache in 2.6 kernel. This also fix some deadlocks
818 and remove hack for work O_SYNC with 2.6 kernel.
820 Severity : enhancement
822 Description: Add uninit_groups feature to ldiskfs2 to speed up e2fsck
823 Details : The uninit_groups feature works in conjunction with the kernel
824 filesystem code (ldiskfs2 only) and e2fsprogs-1.39-cfs6 to speed
825 up the pass1 processing of e2fsck. This is a read-only feature
826 in ldiskfs2 only, so older kernels and current ldiskfs cannot
827 mount filesystems that have had this feature enabled.
829 Severity : enhancement
831 Description: Improve multi-block allocation algorithm to avoid fragmentation
832 Details : The mballoc3 code (ldiskfs2 only) adds new mechanisms to improve
833 allocation locality and avoid filesystem fragmentation.
835 ------------------------------------------------------------------------------
837 2007-02-09 Cluster File Systems, Inc. <info@clusterfs.com>
839 * Support for kernels:
840 2.6.9-42.0.3.EL (RHEL 4)
842 2.4.21-47.0.1.EL (RHEL 3)
843 2.6.12.6 vanilla (kernel.org)
844 2.6.16.21-0.8 (SLES10)
845 * Recommended e2fsprogs version: 1.39.cfs2-0
847 * The backwards-compatible /proc/sys/portals symlink has been removed
848 in this release. Before upgrading, please ensure that you change
849 any configuration scripts or /etc/sysctl.conf files that access
850 /proc/sys/portals/* or sysctl portals.* to use the corresponding
851 entry in /proc/sys/lnet or sysctl lnet.*. This change can be made
852 in advance of the upgrade on any system running Lustre 1.4.6 or
853 newer, since /proc/sys/lnet was added in that version.
854 * Note that reiserfs quotas are disabled on SLES 10 in this kernel
858 Frequency : only when quota is used
860 Description: avoid scanning export list for quota master
861 Details : Change the algorithms to avoid scanning export list in order
862 to improve the efficiency.
865 Frequency : MDS failover only, very rarely
867 Description: "went back in time" messages on mds failover
868 Details : The greatest transno may be lost when the current operation
869 finishes with an error (transno==0) and the client's last_rcvd
870 record is over-written. Save the greatest transno in the
871 mds_last_transno for this case.
874 Frequency : always for specific kernels and striping counts
876 Description: client may get "Matching packet too big" without ACL support
877 Details : Clients compiled without CONFIG_FS_POSIX_ACL get an error message
878 when trying to access files in certain configurations. The
879 clients should in fact be denied when mounting because they do
883 Frequency : Cray XT3 with more than 4000 clients and multiple jobs
885 Description: many clients connecting with IO in progress causes connect timeouts
886 Details : Avoid synchronous journal commits to avoid delays caused by many
887 clients connecting/disconnecting when bulk IO is in progress.
888 Queue liblustre connect requests on OST_REQUEST_PORTAL instead of
889 OST_IO_PORTAL to avoid delays behind potentially many pending
893 Frequency : occasionally with multiple writers to a single file
895 Description: shared writes to file may result in wrong size reported by stat()
896 Details : Allow growing of kms when extent lock is cancelled
899 Frequency : always with random mmap IO to multi-striped file
901 Description: mmap write might be lost if we are writing to a 'hole' in stripe
902 Details : Only if the hole is at the end of OST object so that kms is too
903 small. Fix is to increase kms accordingly in ll_nopage.
906 Frequency : rare, only if OST filesystem is inconsistent with MDS filesystem
908 Description: writes to a missing object would leak memory on the OST
909 Details : If there is an inconsistency between the MDS and OST filesystems,
910 such that the MDS references an object that doesn't exist, writes
911 to that object will leak memory due to incorrect cleanup in the
912 error handling path, eventually running out of memory on the OST.
917 Description: Creating too long symlink causes lustre errors
918 Details : Check symlink and name lengths before sending requests to MDS.
921 Frequency : only if flock is enabled (not on by default)
923 Description: posix locks not released on fd closure on 2.6.9+
924 Details : We failed to add posix locks to list of inode locks on 2.6.9+
925 kernels, this caused such locks not to be released on fd close and
926 then assertions on fs unmount about still used locks.
929 Frequency : MDS failover only, very rarely
931 Description: clients may get ASSERTION(granted_lock != NULL)
932 Details : When request was taking a long time, and a client was resending
933 a getattr by name lock request. The were multiple lock requests
934 with the same client lock handle and
935 mds_getattr_name->fixup_handle_for_resent_request found one of the
936 lock handles but later failed with ASSERTION(granted_lock != NULL).
941 Description: handle->h_buffer_credits > 0, assertion failure
942 Details : h_buffer_credits is zero after truncate, causing assertion
943 failure. This patch extends the transaction or creates a new
947 Frequency : NFS re-export or patchless client
948 Bugzilla : 11179, 10796
949 Description: Crash on NFS re-export node (__d_move)
950 Details : We do not want to hash the dentry if we don't have a lock.
951 But if this dentry is later used in d_move, we'd hit uninitialised
952 list head d_hash, so we just do this to init d_hash field but
953 leave dentry unhashed.
956 Frequency : NFS re-export or patchless client
958 Description: NFS exports has problem with symbolic link
959 Details : lustre client didn't properly install dentry when re-exported
960 to NFS or running patchless client.
963 Frequency : NFS re-export or patchless client
965 Description: Various nfs/patchless fixes.
966 Details : fixes reuse disconected alias for lookup process - this fixes
967 warning "find_exported_dentry: npd != pd",
968 fix permission error with open files at nfs.
969 fix apply umask when do revalidate.
972 Frequency : occasional
974 Description: Crash on NFS re-export node
975 Details : calling clear_page() on the wrong pointer triggered oops in
976 generic_mapping_read().
979 Frequency : rarely, using O_DIRECT IO
981 Description: unaligned directio crashes client with LASSERT
982 Details : check for unaligned buffers before trying any requests.
985 Frequency : rarely, using CFS RAID5 patches in non-standard kernel series
987 Description: stale data returned from RAID cache
988 Details : If only a small amount of IO is done to the RAID device before
989 reading it again it is possible to get stale data from the RAID
990 cache instead of reading it from disk.
993 Frequency : always for sles10 kernel
995 Description: sles10 support
996 Details : ll_follow_link: compile fixes and using of nd_set_link
1000 Frequency : depends on arch, kernel and compiler version, always on sles10
1003 Description: recursive or deep enough symlinks cause stack overflow
1004 Details : getting rid of large stack-allocated variable in
1008 Frequency : depends on hardware
1010 Description: lustre write performance loss in the SLES10 kernel
1011 Details : the performance loss is caused by using of write barriers in the
1012 ext3 code. The SLES10 kernel turns barrier support on by
1013 default. The fix is to undo that change for ldiskfs.
1015 ------------------------------------------------------------------------------
1017 2006-12-09 Cluster File Systems, Inc. <info@clusterfs.com>
1019 * Support for kernels:
1020 2.6.9-42.0.3EL (RHEL 4)
1021 2.6.5-7.276 (SLES 9)
1022 2.4.21-47.0.1.EL (RHEL 3)
1023 2.6.12.6 vanilla (kernel.org)
1027 Frequency : quota enabled and large files being deleted
1029 Description: releasing more than 4GB of quota at once hangs OST
1030 Details : If a user deletes more than 4GB of files on a single OST it
1031 will cause the OST to spin in an infinite loop. Release
1032 quota in < 4GB chunks, or use a 64-bit value for 1.4.7.1+.
1037 Description: statfs data retrieved from /proc may be stale or zero
1038 Details : When reading per-device statfs data from /proc, in the
1039 {kbytes,files}_{total,free,avail} files, it may appear
1040 as zero or be out of date.
1043 Frequency : systems with MD RAID1 external journal devices
1045 Description: lconf's call to blkid is confused by RAID1 journal devices
1046 Details : Use the "blkid -l" flag to locate the MD RAID device instead
1047 of returning all block devices that match the journal UUID.
1050 Frequency : always, for aggregate stripe size over 4GB
1052 Description: "lfs setstripe" fails assertion when setting 4GB+ stripe width
1053 Details : Using "lfs setstripe" to set stripe size * stripe count over 4GB
1054 will fail the kernel with "ASSERTION(lsm->lsm_xfersize != 0)"
1057 Frequency : always if "lfs find" used on a local file/directory
1059 Description: "lfs find" segfaults if used on a local file/directory
1060 Details : The case where a directory component was not specified wasn't
1061 handled correctly. Handle this properly.
1064 Frequency : always on ppc64
1066 Description: the write to an ext3 filesystem mounted with mballoc got stuck
1067 Details : ext3_mb_generate_buddy() uses find_next_bit() which does not
1068 perform endianness conversion.
1071 Frequency : rarely (truncate to non-zero file size after write under load)
1072 Bugzilla : 10730, 10687
1073 Description: Files padded with zeros to next 4K multiple
1074 Details : With filesystems mounted using the "extents" option (2.6 kernels)
1075 it is possible that files that are truncated to a non-zero size
1076 immediately after being written are filled with zero bytes beyond
1077 the truncated size. No file data is lost.
1079 Severity : enhancement
1081 Description: Allow recovery/failover for liblustre clients.
1082 Details : liblustre clients were unaware of failover configurations until
1085 Severity : enhancement
1087 Description: user file locks should fail when not mounting with flock option
1088 Details : Set up an error-returning stub in ll_file_operations.lock field
1089 to prevent incorrect behaviour when client is mounted without
1090 flock option. Also, set up properly f_op->flock field for
1094 Frequency : always on ia64
1096 Description: "lfs df" loops on printing out MDS statfs information
1097 Details : The obd_ioctl_data was not initialized and in some systems
1098 this caused a failure during the ioctl that did not return
1099 an error. Initialize the struct and return an error on failure.
1102 Frequency : SLES 9 only
1104 Description: Error of copying files with lustre special EAs as root
1105 Details : Client side always return success for setxattr call for lustre
1106 special xattr (currently only "trusted.lov").
1109 Frequency : rarely on clusters with both ia64+i386 clients
1111 Description: ia64+i686 clients doing shared IO on the same file may LBUG
1112 Details : In rare cases when both ia64+i686 (or other mixed-PAGE_SIZE)
1113 clients are doing concurrent writes to the same file it is
1114 possible that the ia64 clients may LASSERT because the OST
1115 extent locks are not PAGE_SIZE aligned. Ensure that grown
1116 locks are always aligned on the request boundary.
1119 Frequency : specific use, occasional
1121 Description: Overwriting in use executable truncates on-disk binary image
1122 Details : If one node attempts to overwrite an executable in use by
1123 another node, we now correctly return ETXTBSY instead of
1124 truncating the file.
1126 Severity : enhancement
1128 Description: Async OSC create to avoid the blocking unnecessarily.
1129 Details : If a OST has no remain object, system will block on the creating
1130 when need to create a new object on this OST. Now, ways use
1131 pre-created objects when available, instead of blocking on an
1132 empty osc while others are not empty. If we must block, we block
1133 for the shortest possible period of time.
1138 Description: chmod on Lustre root is propagated to other clients
1139 Details : Re-validate root's dentry in ll_lookup_it to avoid having it
1140 invalid by the follow_mount time.
1143 Frequency : liblustre clients only
1145 Description: Race in 'instant cancel' lock handling could lead to such locks
1146 never to be granted in case of SMP MDS
1147 Details : Do not destroy not yet granted but cbpending locks in
1151 Frequency : replay/resend of open
1153 Description: non null lock assetion failure in mds_intent_policy
1154 Details : Trying to replay/resend lockless open requests resulted in
1155 mds_open() returning 0 with no lock. Now it sets a flag if
1156 a lock is going to be returned.
1158 Severity : enhancement
1160 Description: Checksum enhancements
1161 Details : New checksum enhancements allow for resending RPCs that failed
1164 Severity : enhancement
1166 Description: Tunables on number of dirty pages in cacche
1167 Details : Allow to set limit on number of dirty pages cached.
1172 Description: client crash on unmount - lock still has references
1173 Details : In some error handling cases it was possible to leak a lock
1174 reference on a client while accessing a file. This was not
1175 harmful to the client during operation, but would cause the
1176 client to crash when the filesystem is unmounted.
1179 Frequency : specific case, rare
1181 Description: ETXTBSY on mds though file not in use by client
1182 Details : ETXTBSY is no longer incorrectly returned when attempting to
1183 chmod or chown a directory that the user previously tried to
1184 execute or a currently-executing binary.
1187 Frequency : extremely rare except on liblustre-based clients
1189 Description: Lustre space not freed when files are deleted
1190 Details : Clean up open-unlinked files after client eviction. Previously
1191 the unlink was skipped and the files remained as orphans.
1196 Description: OST failure "would be an LBUG" in waiting_locks_callback()
1197 Details : In some cases it was possible to send a blocking callback to
1198 a client doing a glimpse, even though that client didn't get
1199 a lock granted. When the glimpse lock is cancelled on the OST
1200 the freed lock is left on the waiting list and corrupted the list.
1203 Frequency : all core dumps
1205 Description: Broke core dumps to lustre
1206 Details : Negative dentry may be unhashed if parent does not have UPDATE
1207 lock, but some callers, e.g. do_coredump, expect dentry to be
1208 hashed after successful create, hash it in ll_create_it.
1210 ------------------------------------------------------------------------------
1212 2006-09-13 Cluster File Systems, Inc. <info@clusterfs.com>
1214 * Support for kernels:
1215 2.6.9-42.0.2.EL (RHEL 4)
1216 2.6.5-7.276 (SLES 9)
1217 2.4.21-40.EL (RHEL 3)
1218 2.6.12.6 vanilla (kernel.org)
1222 Frequency : always on RHEL 3
1224 Description: Number of open files grows over time
1225 Details : The number of open files grows over time, whether or not
1226 Lustre is started. This was due to a filp leak introduced
1227 by one of our kernel patches.
1229 ------------------------------------------------------------------------------
1231 08-20-2006 Cluster File Systems, Inc. <info@clusterfs.com>
1233 * Support for kernels:
1234 2.6.9-42.EL (RHEL 4)
1235 2.6.5-7.276 (SLES 9)
1236 2.4.21-40.EL (RHEL 3)
1237 2.6.12.6 vanilla (kernel.org)
1242 Bugzilla : 5719, 9635, 9792, 9684
1243 Description: OST (or MDS) trips assertions in (re)connection under heavy load
1244 Details : If a server is under heavy load and cannot reply to new
1245 connection requests before the client resends the (re)connect,
1246 the connection handling code can behave badly if two service
1247 threads are concurrently handing separate (re)connections from
1248 the same client. Add better locking to the connection handling
1249 code, and ensure that only a single connection will be processed
1250 for a given client UUID, even if the lock is dropped.
1252 Severity : enhancement
1254 Description: add TCP zero-copy support to kernel
1255 Details : Add support to the kernel TCP stack to allow zero-copy bulk
1256 sends if the hardware supports scatter-gather and checksumming.
1257 This allows socklnd to do client-write and server-read more
1258 efficiently and reduce CPU utilization from skbuf copying.
1261 Frequency : only if NFS exporting from client
1263 Description: NULL pointer deref in ll_iocontrol() if chattr mknod file
1264 Details : If setting attributes on a file created under NFS that had
1265 never been opened it would be possible to oops the client
1266 if the file had no objects.
1269 Frequency : always for liblustre
1271 Description: liblustre client does MDS+OSTs setattr RPC for each write
1272 Details : When doing a write from a liblustre client, the client
1273 incorrectly issued an RPC to the MDS and each OST the file was
1274 striped over in order to update the timestamps. When writing
1275 with small chunks and many clients this could overwhelm the MDS
1276 with RPCs. In all cases it would slow down the write because
1277 these RPCs are unnecessary.
1279 Severity : enhancement
1281 Description: allow number of MDS service threads to be changed at module load
1282 Details : It is now possible to change the number of MDS service threads
1283 running. Adding "options mds mds_num_threads={N}" to the MDS's
1284 /etc/modprobe.conf will set the number of threads for the next
1285 time Lustre is restarted (assuming the "mds" module is also
1286 reloaded at that time). The default number of threads will
1287 stay the same, 32 for most systems.
1292 Description: OST crash if filesystem is unformatted or corrupt
1293 Details : If an OST is started on a device that has never been formatted
1294 or if the filesystem is corrupt and cannot even mount then the
1295 error handling cleanup routines would dereference a NULL pointer.
1300 Description: NULL pointer deref in llap_from_page.
1301 Details : get_cache_page_nowait can return a page with NULL (or otherwise
1302 incorrect) mapping if the page was truncated/reclaimed while it was
1303 searched for. Check for this condition and skip such pages when
1304 doing readahead. Introduce extra check to llap_from_page() to
1305 verify page->mapping->host is non-NULL (so page is not anonymous).
1308 Frequency : Sometimes when using sys_sendfile
1310 Description: "page not covered by a lock" warnings from ll_readpage
1311 Details : sendfile called ll_readpage without right page locks present.
1312 Now we introduced ll_file_sendfile that does necessary locking
1313 around call to generic_file_sendfile() much like we do in
1317 Frequency : with certain MDS communication failures at client mount time
1319 Description: NULL pointer deref after failed client mount
1320 Details : a client connection request may delayed by the network layer
1321 and not be sent until after the PTLRPC layer has timed out the
1322 request. If the client fails the mount immediately it will try
1323 to clean up before the network times out the request. Add a
1324 reference from the request import to the obd device and delay
1325 the cleanup until the network drops the request.
1328 Frequency : occasionally during client (re)connect
1330 Description: assertion failure during client (re)connect
1331 Details : processing a client connection request may be delayed by the
1332 client or server longer than the client connect timeout. This
1333 causes the client to resend the connection request. If the
1334 original connection request is replied in this interval, the
1335 client may trip an assertion failure in ptlrpc_connect_interpret()
1336 which thought it would be the only running connect process.
1339 Frequency : only with obd_echo servers and clients that are rebooted
1341 Description: kernel BUG accessing uninitialized data structure
1342 Details : When running an obd_echo server it did not start the ping_evictor
1343 thread, and when a client was evicted an uninitialized data
1344 structure was accessed. Start the ping_evictor in the RPC
1345 service startup instead of the OBD startup.
1347 Severity : enhancement
1348 Bugzilla : 10193 (patchless)
1349 Description: Remove dependency on various unexported kernel interfaces.
1350 Details : No longer need reparent_to_init, exit_mm, exit_files,
1351 sock_getsockopt, filemap_populate, FMODE_EXEC, put_filp.
1354 Frequency : rare (only users of deprecated and unsupported LDAP config)
1356 Description: write_conf for zeroconf mount queried LDAP incorrectly for client
1357 Details : LDAP apparently contains 'lustreName' attributes instead of
1358 'name'. A simple remapping of the name is sufficient.
1361 Frequency : rare (only with non-default dump_on_timeout debug enabled)
1363 Description: waiting_locks_callback trips kernel BUG if client is evicted
1364 Details : Running with the dump_on_timeout debug flag turned on makes
1365 it possible that the waiting_locks_callback() can try to dump
1366 the Lustre kernel debug logs from an interrupt handler. Defer
1367 this log dumping to the expired_lock_main() thread.
1369 Severity : enhancement
1371 Description: Support NFS exporting on 2.6 kernels.
1372 Details : Implement non-rawops metadata methods for NFS server to use without
1373 changing NFS server code.
1376 Frequency : very rare (synthetic metadata workload only)
1378 Description: two racing renames might cause an MDS thread to deadlock
1379 Details : Running the "racer" program may cause one MDS thread to rename
1380 a file from being the source of a rename to being the target of
1381 a rename at exactly the same time that another thread is doing
1382 so, and the second thread has already enqueued these locks after
1383 doing a lookup of the target and is trying to relock them in
1384 order. Ensure that we don't try to re-lock the same resource.
1387 Frequency : only very large systems with liblustre clients
1389 Description: slow eviction of liblustre clients with the "evict_by_nid" RPC
1390 Details : Use asynchronous set_info RPCs to send the "evict_by_nid" to
1391 all OSTs in parallel. This allows the eviction of stale liblustre
1392 clients to proceed much faster than if they were done in series,
1393 and also offers similar improvements for other set_info RPCs.
1398 Description: excessive CPU usage during initial read phase on client
1399 Details : During the initial read phase on a client, it would agressively
1400 retry readahead on the file, consuming too much CPU and impacting
1401 performance (since 1.4.5.8). Improve the readahead algorithm
1402 to avoid this, and also improve some other common cases (read
1403 of small files in particular, where "small" is files smaller than
1404 /proc/fs/lustre/llite/*/max_read_ahead_whole_mb, 2MB by default).
1409 Description: MDS crash when receiving packet with unknown intent.
1410 Details : Do not LBUG in unknown intent case, just return -EFAULT
1412 Severity : enhancement
1413 Bugzilla : 9293, 9385
1414 Description: MDS RPCs are serialised on client. This is unnecessary for some.
1415 Details : Do not serialize getattr (non-intent version) and statfs.
1418 Frequency : occasional, when OST network is overloaded/intermittent
1420 Description: client evicted by OST after bulk IO timeout
1421 Details : If a client sends a bulk IO request (read or write) the OST
1422 may evict the client if it is unresposive to its data GET/PUT
1423 request. This is incorrect if the network is overloaded (takes
1424 too long to transfer the RPC data) or dropped the OST GET/PUT
1425 request. There is no need to evict the client at all, since
1426 the pinger and/or lock callbacks will handle this, and the
1427 client can restart the bulk request.
1430 Frequency : Always when mmapping file with no objects
1432 Description: client crashes when mmapping file with no objects
1433 Details : Check that we actually have objects in a file before doing any
1434 operations on objects in ll_vm_open, ll_vm_close and
1440 Description: Request leak when working with deleted CWD
1441 Details : Introduce advanced request refcount tracking for requests
1442 referenced from lustre intent.
1444 Severity : Enhancement
1446 Description: Cache open file handles on client.
1447 Details : MDS now will return special lock along with openhandle, if
1448 requested and client is allowed to hold openhandle, even if unused,
1449 until such a lock is revoked. Helps NFS a lot, since NFS is opening
1450 closing files for every read/write openration.
1452 Severity : Enhancement
1454 Description: Cache open negative dentries on client when possible.
1455 Details : Guard negative dentries with UPDATE lock on parent dir, drop
1456 negative dentries on lock revocation.
1461 Description: Remounting a client read-only wasn't possible with a zconf mount
1462 Details : It wasn't possible to remount a client read-only with llmount.
1464 Severity : enhancement
1465 Description: Include MPICH 1.2.6 Lustre ADIO interface patch
1466 Details : In lustre/contrib/ or /usr/share/lustre in RPM a patch for
1467 MPICH is included to add Lustre-specific ADIO interfaces.
1468 This is based closely on the UFS ADIO layer and only differs
1469 in file creation, in order to allow the OST striping to be set.
1470 This is user-contributed code and not supported by CFS.
1475 Description: extended inode attributes (immutable, append-only) work improperly
1476 when 2.4 and 2.6 kernels are used on client/server or vice versa
1477 Details : Introduce kernel-independent values for these flags.
1479 Severity : enhancement
1482 Description: Allow fractional MB tunings for lustre in /proc/ filesystem.
1483 Details : Many of the /proc/ tunables can only be tuned at a megabyte
1484 granularity. Now, Fractional MB granularity is be supported,
1485 this is very useful for low memory system.
1487 Severity : enhancement
1489 Description: Getattr by fid
1490 Details : Getting a file attributes by its fid, obtaining UPDATE|LOOKUP
1491 locks, avoids extra getattr rpc requests to MDS, allows '/' to
1492 have locks and avoids getattr rpc requests for it on every stat.
1495 Frequency : Always, for filesystems larger than 2TB
1497 Description: ldiskfs crash at mount for filesystem larger than 2TB with mballoc
1498 Details : Kenrel kmalloc limits allocations to 128kB and this prevents
1499 filesystems larger than 2TB to be mounted with mballoc enabled.
1502 Frequency : Always, for 32-bit kernel without CONFIG_LBD and filesystem > 2TB
1504 Description: ldiskfs crash at mount for filesystem larger than 2TB with mballoc
1505 Details : If a 32-bit kernel is compiled without CONFIG_LBD enabled and a
1506 filesystems larger than 2TB is mounted then the kernel will
1507 silently corrupt the start of the filesystem. CONFIG_LBD is
1508 enabled for all CFS-supported kernels, but the possibility of
1509 this happening with a modified kernel config exists.
1511 Severity : enhancement
1513 Description: add client O_DIRECT support for 2.6 kernels
1514 Details : It is now possible to do O_DIRECT reads and writes to files
1515 in the Lustre client mountpoint on 2.6 kernel clients.
1517 Severity : enhancement
1519 Description: parallel glimpse, setattr, statfs, punch, destroy requests
1520 Details : Sends glimpse, setattr, statfs, punch, destroy requests to OSTs in
1521 parallel, not waiting for response from every OST before sending
1522 a rpc to the next OST.
1527 Description: setattr vs write race when updating file timestamps
1528 Details : Client processes that update a file timestamp into the past
1529 right after writing to the file (e.g. tar) it is possible that
1530 the updated file modification time can be reset to the current
1531 time due to a race between processing the setattr and write RPC.
1533 Severity : enhancement
1535 Description: Bring 'lfs find' closer in line with regular Linux find.
1536 Details : lfs find util supports -atime, -mtime, -ctime, -maxdepth, -print,
1537 -print0 options and obtains all the needed info through the lustre
1540 Severity : enhancement
1542 Description: support up to 1024 configured devices on one node
1543 Details : change obd_dev array from statically allocated to dynamically
1544 allocated structs as they are first used to reduce memory usage
1549 Description: Flush dirty partially truncated pages during truncate
1550 Details : Immediatelly flush partially truncated pages in filter_setattr,
1551 this way we completely avoid having any pages in page cache on OST
1552 and can retire ugly workarounds during writes to flush such pages.
1557 Description: i_sem vs transaction deadlock in mds_obd_destroy during unlink.
1558 Details : protect inode from truncation within vfs_unlink() context
1559 just take a reference before calling vfs_unlink() and release it
1560 when parent's i_sem is free.
1565 Description: last_id value checked outside lock on OST caused LASSERT failure
1566 Details : If there were multiple MDS->OST object precreate requests in
1567 flight, it was possible that the OST's last object id was checked
1568 outside a lock and incorrectly tripped an assertion. Move checks
1569 inside locks, and discard old precreate requests.
1572 Frequency : always, if extents are used on OSTs
1574 Description: index ei_leaf_hi (48-bit extension) is not zeroed in extent index
1575 Details : OSTs using the extents format would not zero the high 16 bits of
1576 the index physical block number. This is not a problem for any
1577 OST filesystems smaller than 16TB, and no kernels support ext3
1578 filesystems larger than 16TB yet. This is fixed in 1.4.7 (all
1579 new/modified files) and can be fixed for existing filesystems
1580 with e2fsprogs-1.39-cfs1.
1585 Description: import connection selection may be incorrect if timer wraps
1586 Details : Using a 32-bit jiffies timer with HZ=1000 may cause backup
1587 import connections to be ignored if the 32-bit jiffies counter
1588 wraps. Use a 64-bit jiffies counter.
1591 Frequency : very large clusters immediately after boot
1593 Description: LNET request buffers exhausted under heavy short-term load
1594 Details : If a large number of client requests are generated on a service
1595 that has previously never seen so many requests it is possible
1596 that the request buffer growth cannot keep up with the spike in
1597 demand. Instead of dropping incoming requests, they are held in
1598 the LND until the RPC service can accept more requests.
1601 Frequency : Sometimes during replay
1603 Description: Assertion failure in ll_local_open after replay.
1604 Details : If replay happened on an open request reply before we were able
1605 to set replay handler, reply will become not swabbed tripping the
1606 assertion in ll_local_open. Now we set the handler right after
1607 recognising of open request
1610 Frequency : very rare
1612 Description: kernel reports "badness in vsnprintf"
1613 Details : Reading from the "recovery_status" /proc file in small chunks
1614 may cause a negative length in lprocfs_obd_rd_recovery_status()
1615 call to vsnprintf() (which is otherwise harmless). Exit early
1616 if there is no more space in the output buffer.
1618 Severity : enhancement
1620 Description: clear OBD RPC statistics by writing to them
1621 Details : It is now possible to clear the OBD RPC statistics by writing
1622 to the "stats" file.
1627 Description: Client mtime is not the same on different clients after utimes
1628 Details : In some cases, the client was using the utimes() syscall on
1629 a file cached on another node. The clients now validate the
1630 ctime from the MDS + OSTs to determine which one is right.
1635 Description: Inability to activate failout mode
1636 Details : lconf script incorrectly assumed that in pythong string's numeric
1637 value is used in comparisons.
1640 Frequency : always with multiple stripes per file
1642 Description: Inefficient object allocation for mutli-stripe files
1643 Details : When selecting which OSTs to stripe files over, for files with
1644 a stripe count that divides evenly into the number of OSTs,
1645 the MDS is always picking the same starting OST for each file.
1646 Return the OST selection heuristic to the original design.
1651 Description: mount failures may take full timeout to return an error
1652 Details : Under some heavy load conditions it is possible that a
1653 failed mount can wait for the full obd_timeout interval,
1654 possibly several minutes, before reporting an error.
1655 Instead return an error as soon as the status is known.
1657 Frequency : quota enabled and large files being deleted
1659 Description: releasing more than 4GB of quota at once hangs OST
1660 Details : If a user deletes more than 4GB of files on a single OST it
1661 will cause the OST to spin in an infinite loop. Release
1662 quota in < 4GB chunks, or use a 64-bit value for 1.4.7.1+.
1667 Description: statfs data retrieved from /proc may be stale or zero
1668 Details : When reading per-device statfs data from /proc, in the
1669 {kbytes,files}_{total,free,avail} files, it may appear
1670 as zero or be out of date.
1673 Frequency : systems with MD RAID1 external journal devices
1675 Description: lconf's call to blkid is confused by RAID1 journal devices
1676 Details : Use the "blkid -l" flag to locate the MD RAID device instead
1677 of returning all block devices that match the journal UUID.
1680 Frequency : always, for aggregate stripe size over 4GB
1682 Description: assertion fails when trying to use 4GB stripe size
1683 Details : Use "setstripe" to set stripe size over 4GB will fail the kernel,
1684 complaining "ASSERTION(lsm->lsm_xfersize != 0)"
1687 Frequency : always on ppc64
1689 Description: the first write on an ext3 filesystem with mballoc got stuck
1690 Details : ext3_mb_generate_buddy() uses find_next_bit() which does not
1691 perform endianness conversion.
1693 ------------------------------------------------------------------------------
1695 02-14-2006 Cluster File Systems, Inc. <info@clusterfs.com>
1697 * WIRE PROTOCOL CHANGE. This version of Lustre networking WILL NOT
1698 INTEROPERATE with older versions automatically. Please read the
1699 user documentation before upgrading any part of a live system.
1700 * WARNING: Lustre networking configuration changes are required with
1701 this release. See https://bugzilla.clusterfs.com/show_bug.cgi?id=10052
1704 * Support for kernels:
1705 2.6.9-22.0.2.EL (RHEL 4)
1706 2.6.5-7.244 (SLES 9)
1707 2.6.12.6 vanilla (kernel.org)
1710 Severity : enhancement
1711 Bugzilla : 7981/8208
1712 Description: Introduced Lustre Networking (LNET)
1713 Details : LNET is new networking infrastructure for Lustre, it includes
1714 a reorganized network configuration mode (see the user
1715 documentation for full details) as well as support for routing
1716 between different network fabrics. Lustre Networking Devices
1717 (LNDs) for the supported network fabrics have also been
1718 created for this new infrastructure.
1720 Severity : enhancement
1721 Description: Introduced Access control lists
1722 Details : clients can set ACLs on files and directories in order to have
1723 more fine-grained permissions than the standard Unix UGO+RWX.
1724 The MDS must be started with the "-o acl" mount option.
1726 Severity : enhancement
1727 Description: Introduced filesystem quotas
1728 Details : Administrators may now establish per-user quotas on the
1731 Severity : enhancement
1733 Description: Configuration change for the XT3
1734 The PTLLND is now used to run Lustre over Portals on the XT3
1735 The configure option(s) --with-cray-portals are no longer used.
1736 Rather --with-portals=<path-to-portals-includes> is used to
1737 enable building on the XT3. In addition to enable XT3 specific
1738 features the option --enable-cray-xt3 must be used.
1743 Description: Running on many-way SMP OSTs can trigger oops in llcd_send()
1744 Details : A race between allocating a new llcd and re-getting the llcd_lock
1745 allowed another thread to grab newly-allocated llcd.
1747 Severity : enhancement
1749 Description: 2.6 OST async journal commit and locking fix to improve performance
1750 Details : The filter_direct_io()+filter_commitrw_write() journal commits for
1751 2.6 kernels are now async as they already were in 2.4 kernels so
1752 that they can commit concurrently with the network bulk transfer.
1753 For block-allocated files the filter allocation semaphore is held
1754 to avoid filesystem fragmentation during allocation. BKL lock
1755 removed for 2.6 xattr operations where it is no longer needed.
1760 Description: lconf incorrectly determined whether two IP networks could talk
1761 Details : In some more complicated routing and multiple-network
1762 configurations, lconf will avoid trying to make a network
1763 connection to a disjoint part of the IP space. It was doing the
1764 math incorrectly for one set of cases.
1769 Description: Fix for potential infinite loop processing records in an llog.
1770 Details : If an llog record is corrupted/zeroed, it is possible to loop
1771 forever in llog_process(). Validate the llog record length
1772 and skip the remainder of the block on error.
1775 Frequency : occasional (liblustre only)
1777 Description: liblustre could not open files whose last component is a symlink
1778 Details : sysio_path_walk() would incorrectly pass the open intent to
1779 intermediate path components.
1782 Frequency : rare (liblustre only with non-standard tuning)
1783 Bugzilla : 7201 (7350)
1784 Description: Tuning the MDC DLM LRU size to zero triggers client LASSERT
1785 Details : llu_lookup_finish_locks() tries to set lock data on a lock
1786 after it has been released, only do this for referenced locks
1788 Severity : enhancement
1790 Description: specifying an (invalid) directory default stripe_size of -1
1791 would reset the directory default striping
1792 Details : stripe_size -1 was used internally to signal directory stripe
1793 removal, now use "all default" to signal dir stripe removal
1794 as a directory striping of "all default" is not useful
1797 Frequency : common for large clusters running liblustre clients
1799 Description: doing an ls when liblustre clients are running is slow
1800 Details : sending a glimpse AST to a liblustre client waits for every AST
1801 to time out, as liblustre clients will not respond. Since they
1802 cannot cache data we refresh the OST lock LVB from disk instead.
1804 Severity : enhancement
1806 Description: doing an ls at the same time as file IO can be slow
1807 Details : enqueue and other "small" requests can be blocked behind many
1808 large IO requests. Create a new OST IO portal for non-IO
1809 requests so they can be processed faster.
1812 Frequency : rare (only HPUX clients mounting unsupported re-exported NFS vol)
1814 Description: an HPUX NFS client would get -EACCESS when ftruncate()ing a newly
1815 created file with mode 000
1816 Details : the Linux NFS server relies on an MDS_OPEN_OWNEROVERRIDE hack to
1817 allow an ftruncate() as a non-root user to a file with mode 000.
1818 Lustre now respects this flag to disable mode checks when
1819 truncating a file owned by the user
1822 Frequency : liblustre-only, when liblustre client dies unexpectedly or becomes
1825 Description: Revoking locks from clients that went dead or catatonic might take
1827 Details : New lock flags FL_CANCEL_ON_BLOCK used by liblustre makes
1828 cancellation of such locks instant on servers without waiting for
1829 any reply from clients. Clients drops these locks when cancel
1830 notification from server is received without replying.
1833 Frequency : liblustre-only, when liblustre client dies or becomes busy
1835 Description: Doing ls on Linux clients can take a long time with active
1837 Details : Liblustre client cannot handle ASTs in timely manner, so avoid
1838 granting such locks to it in the first place if possible. Locks
1839 are taken by proxy on the OST during the read or write and
1840 dropped immediately afterward. Add connect flags handling, do
1841 not grant locks to liblustre clients for glimpse ASTs.
1843 Severity : enhancement
1845 Description: Improve read-ahead algorithm to avoid excessive IO for random reads
1846 Details : Existing read-ahead algorithm is tuned for the case of streamlined
1847 sequential reads and behaves badly with applications doing random
1848 reads. Improve it by reading ahead at least read region, and
1849 avoiding excessive large RPC for small reads.
1851 Severity : enhancement
1853 Description: Creating more than 1000 files for a single job may cause a load
1854 imbalance on the OSTs if there are also a large number of OSTs.
1855 Details : qos_prep_create() uses an OST index reseed value that is an
1856 even multiple of the number of available OSTs so that if the
1857 reseed happens in the middle of the object allocation it will
1858 still utilize the OSTs as uniformly as possible.
1863 Description: OST or MDS may oops in ping_evictor_main()
1864 Details : ping_evictor_main() drops obd_dev_lock if deleting a stale export
1865 but doesn't restart at beginning of obd_exports_timed list
1868 Severity : enhancement
1870 Description: improve by-nid export eviction on the MDS and OST
1871 Details : allow multiple exports with the same NID to be evicted at one
1872 time without re-searching the exports list.
1875 Frequency : rare, only with supplementary groups enabled on SMP 2.6 kernels
1877 Description: MDS may oops in groups_free()
1878 Details : in rare race conditions a newly allocated group_info struct is
1879 freed again, and this can be NULL. The 2.4 compatibility code
1880 for groups_free() checked for a NULL pointer, but 2.6 did not.
1883 Frequency : common for liblustre clients doing little filesystem IO
1884 Bugzilla : 9352, 7313
1885 Description: server may evict liblustre clients accessing contended locks
1886 Details : if a client is granted a lock or receives a completion AST
1887 with a blocking AST already set it would not reply to the AST
1888 for LDLM_FL_CANCEL_ON_BLOCK locks. It now replies to such ASTs.
1891 Frequency : lfs setstripe, only systems with more than 160 OSTs
1893 Description: unable to set striping with a starting offset beyond OST 160
1894 Details : llapi_create_file() incorrectly limited the starting stripe
1895 index to the maximum single-file stripe count.
1898 Frequency : LDAP users only
1900 Description: lconf did not handle in-kernel recovery with LDAP properly
1901 Details : lconf/LustreDB get_refs() is searching the wrong namespace
1903 Severity : enhancement
1905 Description: bind OST threads to NUMA nodes to improve performance
1906 Details : all OST threads are uniformly bound to CPUs on a single NUMA
1907 node and do their allocations there to localize memory access
1909 Severity : enhancement
1911 Description: llmount can determine client NID directly from Myrinet (GM)
1912 Details : the client NID code from gmnalnid was moved directly into
1913 llmount, removing the need to use this or specifying the
1914 client NID explicitly when mounting GM clients with zeroconf
1917 Frequency : if client is started with down MDS
1919 Description: if client is started with down MDS mount hangs in ptlrpc_queue_wait
1920 Details : Having an LWI_INTR() wait event (interruptible, but no timeout)
1921 will wait indefinitely in ptlrpc_queue_wait->l_wait_event() after
1922 ptlrpc_import_delayed_req() because we didn't check if the
1923 request was interrupted, and we also didn't break out of the
1924 event loop if there was no timeout
1929 Description: data loss during non-page-aligned writes to a single file from
1930 both multiple nodes and multiple threads on one node at same time
1931 Details : updates to KMS and lsm weren't protected by common lock. Resulting
1932 inconsistency led to false short-reads, that were cached and later
1933 used by ->prepare_write() to fill in partially written page,
1934 leading to data loss.
1937 Frequency : always, if lconf --abort_recovery used
1939 Description: lconf --abort_recovery fails with 'Operation not supported'
1940 Details : lconf was attempting to abort recovery on the MDT device and not
1943 Severity : enhancement
1945 Description: remove cleanup logs
1946 Details : replace lconf-generated cleanup logs with lustre internal
1947 cleanup routines. Eliminates the need for client-cleanup and
1950 Severity : enhancement
1952 Description: add support for EAs (user and system) on lustre filesystems
1953 Details : it is now possible to store extended attributes in the Lustre
1954 client filesystem, and with the user_xattr mount option it
1955 is possible to allow users to store EAs on their files also
1957 Severity : enhancement
1959 Description: Add possibility (config option) to show minimal available OST free
1961 Details : When compiled with --enable-mindf configure option, statfs(2)
1962 (and so, df) will return least minimal free space available from
1963 all OSTs as amount of free space on FS, instead of summary of
1964 free spaces of all OSTs.
1966 Severity : enhancement
1968 Description: do not expand extent locks acquired on OST-side
1969 Details : Modify ldlm_extent_policy() to not expand local locks, acquired
1970 by server: they are not cached anyway.
1973 Frequency : when mmap is used/binaries executed from Lustre
1975 Description: Unmmap pages before throwing them away from read cache.
1976 Details : llap_shrink cache now attempts to unmap pages before discarding
1977 them (if unmapping failed - do not discard). SLES9 kernel has
1978 extra checks that trigger if this unmapping is not done first.
1983 Description: lconf didn't resolve symlinks before checking to see whether a
1984 given mountpoint was already in use
1987 Frequency : when migrating failover services
1988 Bugzilla : 6395, 9514
1989 Description: When migrating a subset of services from a node (e.g. failback
1990 from a failover service node) the remaining services would
1991 time out and evict clients.
1992 Details : lconf --force (implied by --failover) sets the global obd_timeout
1993 to 5 seconds in order to quickly disconnect, but this caused
1994 other RPCs to time out too quickly. Do not change the global
1995 obd_timeout for force cleanup, only set it for DISCONNECT RPCs.
1997 Severity : enhancement
1998 Frequency : if MDS is started with down OST
1999 Bugzilla : 9439,5706
2000 Description: Allow startup/shutdown of an MDS without depending on the
2001 availability of the OSTs.
2002 Details : Asynchronously call mds_lov_synchronize during MDS startup.
2003 Add appropriate locking and lov-osc refcounts for safe
2004 cleaning. Add osc abort_inflight calls in case the
2005 synchronize never started.
2008 Frequency : occasional (Cray XT3 only)
2010 Description: root not authorized to access files in CRAY_PORTALS environment
2011 Details : The client process capabilities were not honoured on the MDS in
2012 a CRAY_PORTALS/CRAY_XT3 environment. If the file had previously
2013 been accessed by an authorized user then root was able to access
2014 the file on the local client also. The root user capabilities
2015 are now allowed on the MDS, as this environment has secure UID.
2018 Frequency : occasional
2020 Description: ldiskfs "too long searching" message happens too often
2021 Details : A debugging message (otherwise harmless) prints too often on
2022 the OST console. This has been reduced to only happen when
2023 there are fragmentation problems on the filesystem.
2028 Description: Division by zero in statfs when all OSCs are inactive
2029 Details : lov_get_stripecnt() returns zero due to incorrect order of checks,
2030 lov_statfs divides by value returned by lov_get_stripecnt().
2034 Bugzilla : 9489, 3273
2035 Description: First write from each client to each OST was only 4kB in size,
2036 to initialize client writeback cache, which caused sub-optimal
2037 RPCs and poor layout on disk for the first writen file.
2038 Details : Clients now request an initial cache grant at (re)connect time
2039 and so that they can start streaming writes to the cache right
2040 away and always do full-sized RPCs if there is enough data.
2041 If the OST is rebooted the client also re-establishes its grant
2042 so that client cached writes will be honoured under the grant.
2047 Description: Slow ls (and stat(2) syscall) on files residing on IO-loaded OSTs
2048 Details : Now I/O RPCs go to different portal number and (presumably) fast
2049 lock requests (and glimses) and other RPCs get their own service
2050 threads pool that should be able to service those RPCs
2053 Severity : enhancement
2055 Description: Ability to exchange lustre version between client and servers and
2056 issue warnings at client side if client is too old. Also for
2057 liblustre clients there is ability to refuse connection of too old
2059 Details : New 'version' field is added to connect data structure that is
2060 filled with version info. That info is later checked by server and
2064 Frequency : rare, liblustre only.
2065 Bugzilla : 9296, 9581
2066 Description: Two simultaneous writes from liblustre at offset within same page
2067 might proceed at the same time overwriting eachother with stale
2069 Details : I/O lock withing llu_file_prwv was released too early, before data
2070 actually was hitting the wire. Extended lock-holding time until
2071 server acknowledges receiving data.
2074 Frequency : extremely rare. Never observed in practice.
2076 Description: avoid generating lustre_handle cookie of 0.
2077 Details : class_handle_hash() generates handle cookies by incrementing
2078 global counter, and can hit 0 occasionaly (this is unlikely, but
2079 not impossible, because initial value of cookie counter is
2080 selected randonly). Value of 0 is used as a sentinel meaning
2081 "unassigned handle" --- avoid it. Also coalesce two critical
2082 sections in this function into one.
2084 Severity : enhancement
2086 Description: allow liblustre clients to delegate truncate locking to OST
2087 Details : To avoid overhead of locking, liblustre client instructs OST to
2088 take extent lock in ost_punch() on client's behalf. New connection
2089 flag is added to handle backward compatibility.
2091 Severity : enhancement
2092 Bugzilla : 4928, 7341, 9758
2093 Description: allow number of OST service threads to be specified
2094 Details : a module parameter allows the number of OST service threads
2095 to be specified via "options ost ost_num_threads={N}" in the
2096 OSS's /etc/modules.conf or /etc/modprobe.conf.
2100 Bugzilla : 6146, 9635, 9895
2101 Description: servers crash with bad pointer in target_handle_connect()
2102 Details : In rare cases when a client is reconnecting it was possible that
2103 the connection request was the last reference for that export.
2104 We would temporarily drop the export reference and get a new
2105 one, but this may have been the last reference and the export
2106 was just destroyed. Get new reference before dropping old one.
2108 Severity : enhancement
2109 Frequency : if client is started with failover MDS
2111 Description: Allow multiple MDS hostnames in the mount command
2112 Details : Try to read the configuration from all specified MDS
2113 hostnames during a client mount in case the "primary"
2116 Severity : enhancement
2118 Description: Stop sending data to evicted clients as soon as possible.
2119 Details : Check if the client we are about to send or are sending data to
2120 was evicted already. (Check is done every second of waiting,
2121 for which l_wait_event interface was extended to allow checking
2122 of exit condition at specified intervals).
2125 Frequency : rare, normally only when NFS exporting is done from client
2127 Description: 'bad disk LOV MAGIC: 0x00000000' error when chown'ing files
2129 Details : Make mds_get_md() recognise empty md case and set lmm size to 0.
2132 Frequency : always, if srand() is called before liblustre initialization
2134 Description: Liblustre uses system PRNG disturbing its usage by user application
2135 Details : Introduce internal to lustre fast and high-quality PRNG for
2136 lustre usage and make liblustre and some other places in generic
2137 lustre code to use it.
2139 Severity : enhancement
2140 Bugzilla : 9477, 9557, 9870
2141 Description: Verify that the MDS configuration logs are updated when xml is
2142 Details : Check if the .xml configuration logs are newer than the config
2143 logs stored on the MDS and report an error if this is the case.
2144 Request --write-conf, or allow starting with --old_conf.
2146 Severity : enhancement
2148 Description: Handle symlinks in the path when checking if Lustre is mounted.
2149 Details : Resolve intermediate symlinks when checking if a client has
2150 mounted a filesystem to avoid duplicate client mounts.
2155 Description: lconf can hit an error exception but still return success.
2156 Details : The lconf command catches the Command error exception at the top
2157 level script context and will exit with the associated exit
2158 status, but doesn't ensure that this exit status is non-zero.
2163 Description: failure of ptlrpc thread startup can cause oops
2164 Details : Starting a ptlrpc service thread can fail if there are a large
2165 number of threads or the server memory is very fragmented.
2166 Handle this without oopsing.
2169 Frequency : always, only if liblustre and non-default acceptor port was used
2171 Description: liblustre cannot connect to servers with non-default acceptor port
2172 Details : tcpnal_set_default_params() was not called and was therefore
2173 ignoring the environment varaible TCPNAL_PORT, as well as other
2174 TCPNAL_ environment variables
2179 Description: two objects could be created on the same OST for a single file
2180 Details : If an OST is down, in some cases it was possible to create two
2181 objects on a single OST for a single file. No problems other
2182 than potential performance impact and spurious error messages.
2186 Bugzilla : 5681, 9562
2187 Description: Client may oops in ll_unhash_aliases
2188 Details : Client dcache may become inconsistent in race condition.
2189 In some cases "getcwd" can fail if the current directory is
2195 Description: Inode refcounting problems in NFS export code
2196 Details : link_raw functions used to call d_instantiate without obtaining
2197 extra inode reference first.
2201 Bugzilla : 9942, 9903
2202 Description: Referencing freed requests leading to crash, memleaks with NFS.
2203 Details : We used to require that call to ll_revalidate_it was always
2204 followed by ll_lookup_it. Also with revalidate_special() it is
2205 possible to call ll_revalidate_it() twice for the same dentry
2206 even if first occurence returned success. This fix changes semantic
2207 between DISP_ENQ_COMPLETE disposition flag to mean there is extra
2208 reference on a request referred from the intent.
2209 ll_intent_release() then releases such a request.
2212 Frequency : rare, normally benchmark loads only
2214 Description: unlinked inodes were kept in memory on the client
2215 Details : If a client is repeatedly creating and unlinking files it
2216 can accumulate a lot of stale inodes in the inode slab cache.
2217 If there is no other client load running this can cause the
2218 client node to run out of memory. Instead flush old inodes
2219 from client cache that have the same inode number as a new inode.
2222 Frequency : SLES9 2.6.5 kernel and long filenames only
2223 Bugzilla : 9969, 10379
2224 Description: utime reports stale NFS file handle
2225 Details : SLES9 uses out-of-dentry names in some cases, which confused
2226 the lustre dentry revalidation. Change it to always use the
2230 Frequency : rare, unless heavy write-truncate concurrency is continuous
2231 Bugzilla : 4180, 6984, 7171, 9963, 9331
2232 Description: OST becomes very slow and/or deadlocked during object unlink
2233 Details : filter_destroy() was holding onto the parent directory lock
2234 while truncating+unlinking objects. For very large objects this
2235 may block other threads for a long time and slow overall OST
2236 responsiveness. It may also be possible to get a lock ordering
2237 deadlock in this case, or run out of journal credits because of
2238 the combined truncate+unlink. Solution is to do object truncate
2239 first in one transaction without parent lock, and then do the
2240 final unlink in a new transaction with the parent lock. This
2241 reduces the lock hold time dramatically.
2244 Frequency : rare, 2.4 kernels only
2246 Description: MDS or OST cleanup may trip kernel BUG when dropping kernel lock
2247 Details : mds_cleanup() and filter_cleanup() need to drop the kernel lock
2248 before unmounting their filesystem in order to avoid deadlock.
2249 The kernel_locked() function in 2.4 kernels only checks whether
2250 the kernel lock is held, not whether it is this process that is
2251 holding it as 2.6 kernels do.
2256 Description: MDS or OST may oops/LBUG if a client is connecting multiple times
2257 Details : The client ptlrpc code may be trying to reconnect to a down
2258 server before a previous connection attempt has timed out.
2259 Increase the reconnect interval to be longer than the connection
2260 timeout interval to avoid sending duplicate connections to
2264 Frequency : echo_client brw_test command
2266 Description: fix echo_client to work with OST preallocated code
2267 Details : OST preallocation code (5137) didn't take echo_client IO path
2268 into account: echo_client calls filter methods outside of any
2269 OST thread and, hence, there is no per-thread preallocated
2270 pages and buffers to use. Solution: hijack pga pages for IO. As
2271 a byproduct, this avoids unnecessary data copying.
2275 Bugzilla : 3555, 5962, 6025, 6155, 6296, 9574
2276 Description: Client can oops in mdc_commit_close() after open replay
2277 Details : It was possible for the MDS to return an open request with no
2278 transaction number in mds_finish_transno() if the client was
2279 evicted, but without actually returning an error. Clients
2280 would later try to replay that open and may trip an assertion
2281 Simplify the client close codepath, and always return an error
2282 from the MDS in case the open is not successful.
2285 Frequency : rare, 2.6 OSTs only
2287 Description: OST may deadlock under high load on fragmented files
2288 Details : If there was a heavy load and highly-fragmented OST filesystems
2289 it was possible to have all the OST threads deadlock waiting on
2290 allocation of biovecs, because the biovecs were not released
2291 until the entire RPC IO was completed. Instead, release biovecs
2292 as soon as they are complete to ensure forward IO progress.
2294 Severity : enhancement
2296 Description: Support for specifying external journal device at mount
2297 Details : If an OST or MDS device is formatted with an external journal
2298 device, this device major/minor is stored in the ext3 superblock
2299 and may not be valid for failover. Allow detecting and
2300 specifying the external journal at mount time.
2305 Description: Mounting an MDS with pending unlinked files may cause oops
2306 Details : target_finish_recovery() calls mds_postrecov() which returned
2307 the number of orphans unlinked. mds_lov_connect->mds_postsetup()
2308 considers this an error and immediately begins cleaning up the
2309 lov, just after starting the mds_lov process
2311 Severity : enhancement
2313 Description: Implement 'lfs df' to report actual free space on per-OST basis
2314 Details : Add sub-command 'df' on 'lfs' to report the disk space usage of
2315 MDS/OSDs. Usage: lfs df [-i][-h]. Command Options: '-i' to report
2316 usage of objects; '-h' to report in human readable format.
2318 ------------------------------------------------------------------------------
2320 08-26-2005 Cluster File Systems, Inc. <info@clusterfs.com>
2327 Description: Mounting an ldiskfs file system with mballoc may crash OST node.
2328 Details : ldiskfs mballoc code may reference an uninitialized buddy struct
2329 at startup during orphan unlinking. Instead, skip buddy update
2330 before setup, as it will be regenerated after recovery is complete.
2335 Description: If an OST is inactive, its locks might reference stale inodes.
2336 Details : lov_change_cbdata() must iterate over all namespaces, even if
2337 they are inactive to clear inode references from the lock.
2339 Severity : enhancement
2340 Frequency : occasional, if non-standard max_dirty_mb used
2342 Description: Client will block write RPCs if not enough grant
2343 Details : If a client has max_dirty_mb smaller than max_rpcs_in_flight,
2344 then the client will block writes while waiting for another RPC
2345 to complete instead of consuming its dirty limit. With change
2346 we get improved performance when max_dirty_mb is small.
2348 Severity : enhancement
2349 Bugzilla : 3389, 6253
2350 Description: Add support for supplementary groups on the MDS.
2351 Details : The MDS has an upcall /proc/fs/lustre/mds/{mds}/group_upcall
2352 (set to /usr/sbin/l_getgroups if enabled) which will do MDS-side
2353 lookups for user supplementary groups into a cache.
2357 Description: O_CREAT|O_EXCL open flags in liblustre always return -EEXIST
2358 Details : Make libsysio to not enforce O_EXCL by clearing the flag,
2359 for liblustre O_EXCL is enforced by MDS.
2363 Description: readdir never returns NULL in liblustre.
2364 Details : Corrected llu_iop_getdirentries logic, to return offset of next
2365 dentry in struct dirent.
2369 Frequency : liblustre only, depends on application IO pattern
2370 Description: liblustre clients evicted if not contacting servers
2371 Details : Don't put liblustre clients into the ping_evictor list, so
2372 they will not be evicted by the pinger ever.
2374 Severity : enhancement
2376 Description: Add ability to evict clients by NID from MDS.
2377 Details : By echoing "nid:$NID" string into
2378 /proc/fs/lustre/mds/.../evict_client client with nid that equals to
2379 $NID would be instantly evicted from this MDS and from all active
2380 OSTs connected to it.
2384 Description: Do not query file size twice, somewhat slowing stat(2) calls.
2385 Details : lookup_it_finish() used to query file size from OSTs that was not
2390 Description: service threads change working directory to that of init
2391 Details : Starting lustre service threads may pin the working directory
2392 of the parent thread, making that filesystem busy. Threads
2393 now change to the working directory of init to avoid this.
2397 Frequency : during shutdown only
2398 Description: shutdown with a failed MDS or OST can cause unmount to hang
2399 Details : Don't resend DISCONNECT messages in ptlrpc_disconnect_import()
2404 Frequency : 2.6 only
2405 Description: chmod/chown may include an extra supplementary group
2406 Details : ll{,u}_mdc_pack_op_data() does not properly initialize the
2407 supplementary group and if none is specified this is used.
2410 Bugzilla : 5479 (6816)
2412 Description: Racing open + rm can assert client in mdc_set_open_replay_data()
2413 Details : If lookup is in progress on a file that is unlinked we might try
2414 to revalidate the inode and fail in revalidate after lookup is
2415 complete and ll_file_open() enqueues the open again but
2416 it_open_error() was not checking DISP_OPEN_OPEN errors correctly.
2419 Frequency : always, if lconf --abort_recovery used
2421 Description: lconf --abort_recovery fails with 'Operation not supported'
2422 Details : lconf was attempting to abort recovery on the MDT device and not
2425 ------------------------------------------------------------------------------
2427 2005-08-08 Cluster File Systems, Inc. <info@clusterfs.com>
2432 Frequency : rare (only unsupported configurations with a node running as an
2434 Bugzilla : 6514, 5137
2435 Description: Mounting a Lustre file system on a node running as an OST could
2437 Details : OSTs now preallocates memory needed to write out data at
2438 startup, instead of when needed, to avoid having to
2439 allocate memory in possibly low memory situations.
2440 Specifically, if the file system is mounted on on OST,
2441 memory pressure could force it to try to write out data,
2442 which it needed to allocate memory to do. Due to the low
2443 memory, it would be unable to do so and the node would
2444 become unresponsive.
2446 Severity : enhancement
2448 Description: Addition of lconf --service command line option
2449 Details : lconf now accepts a '--service <arg>' option, which is
2450 shorthand for 'lconf --group <arg> --select <arg>=<hostname>'
2452 Severity : enhancement
2454 Description: Failover mode is now the default for OSTs.
2455 Details : By default, OSTs will now run in failover mode. To return to
2456 the old behaviour, add '--failout' to the lmc line for OSTs.
2458 Severity : enhancement
2460 Description: Health checks are now provided for MDS and OSTs
2461 Details : Additional detailed health check information on MSD and OSTs
2462 is now provided through the procfs health_check value.
2465 Frequency : occasional, depends on IO load
2467 Description: Disk fragmentation on the OSTs could eventually cause slowdowns
2468 after numerous create/delete cycles
2469 Details : The ext3 inode allocation policy would not allocate new inodes
2470 very well on the OSTs because there are no new directories
2471 being created. Instead we look for groups with free space if
2472 the parent directories are nearly full.
2477 Description: Network or server problems during mount may cause partially
2478 mounted clients instead of returning an error.
2479 Details : The config llog parsing code may overwrite the error return
2480 code during mount error handling, returning success instead
2486 Description: MDS can fail to allocate large reply buffers
2487 Details : After long uptimes the MDS can fail to allocate large reply
2488 buffers (e.g. zconf client mount config records) due to memory
2489 fragmentation or consumption by the buffer cache. Preallocate
2490 some large reply buffers so that these replies can be sent even
2491 under memory pressure.
2495 Frequency : rare (liblustre)
2496 Description: fsx running with liblustre complained that using truncate() to
2497 extend the file doesn't work. This patch corrects that issue.
2498 Details : This is the liblustre equivalent of the fix for bug 6196. Fixes
2499 ATTR_SIZE and lsm use in llu_setattr_raw.
2503 Frequency : rare, only 2.6 kernels
2504 Description: Unusual file access patterns on the MDS may result in inode
2505 data being lost in very rare circumstances.
2506 Details : Bad interaction between the ea-in-inode patch and the "no-read"
2507 code in the 2.6 kernel caused the inode and/or EA data not to
2508 be read from disk, causing single-file corruption.
2512 Frequency : rare, only 2.6 filesystems using extents
2513 Description: Heavy concurrent write and delete load may cause data corruption.
2514 Details : It was possible under high-load situations to have an extent
2515 metadata block in the block device cache from a just-unlinked
2516 file overwrite a newly-allocated data block. We now unmap any
2517 metadata buffers that alias just-allocated data blocks.
2521 Frequency : filesystems with default stripe_count larger than 77
2522 Description: lconf+mke2fs fail when formatting filesystem with > 77 stripes
2523 Details : lconf specifies an inode size of 4096 bytes when the default
2524 stripe_count is larger than 77. This conflicts with the default
2525 inode density of 1 per 4096 bytes. Allocate smaller inodes in
2526 this case to avoid pinning too much memory for large EAs.
2528 ------------------------------------------------------------------------------
2530 2005-07-07 Cluster File Systems, Inc. <info@clusterfs.com>
2535 Frequency : rare (extremely heavy IO load with hundreds of clients)
2537 Description: Client is evicted, gets IO error writing to file
2538 Details : lock ordering changes for bug 5492 reintroduced bug 3267 and
2539 caused clients to be evicted for AST timeouts. The fixes in
2540 bug 5192 mean we no longer need to have such short AST timeouts
2541 so ldlm_timeout has been increased.
2544 Frequency : occasional during --force or --failover shutdown under load
2545 Bugzilla : 5949, 4834
2546 Description: Server oops/LBUG if stopped with --force or --failover under load
2547 Details : a collection of import/export refcount and cleanup ordering
2548 issues fixed for safer force cleanup
2551 Frequency : only filesystems larger than 120 OSTs
2552 Bugzilla : 5990, 6223
2553 Description: lfs getstripe would oops on a very large filesystem
2554 Details : lov_getconfig used kfree on vmalloc'd memory
2557 Frequency : only filesystems exporting via NFS to Solaris 10 clients
2558 Bugzilla : 6242, 6243
2559 Description: reading from files that had been truncated to a non-zero size
2560 but never opened returned no data
2561 Details : ll_file_read() reads zeros from no-object files to EOF
2566 Description: A bug in MDS/OSS recovery could cause the OSS to fail an assertion
2567 Details : There's little harm in aborting MDS/OSS recovery and letting it
2568 try again, so I removed the LASSERT and return an error instead.
2570 Severity : enhancement
2572 Description: New debugging infrastructure for tracking down data corruption
2573 Details : The I/O checksum code was replaced to: (a) control it at runtime,
2574 (b) cover more of the client-side code path, and (c) try to narrow
2575 down where problems occurred
2579 Bugzilla : 3819, 4364, 4397, 6313
2580 Description: Racing close and eviction MDS could cause assertion in mds_close
2581 Details : It was possible to get multiple mfd references during close and
2582 client eviction, leading to one thread referencing a freed mfd.
2584 Severity: : enhancement
2585 Bugzilla : 3262, 6359
2586 Description: Attempts to reconnect to servers are now more aggressive.
2587 Details : This builds on the enhanced upcall-less recovery that was added
2588 in 1.4.2. When trying to reconnect to servers, clients will
2589 now try each server in the failover group every 10 seconds. By
2590 default, clients would previously try one server every 25 seconds.
2595 Description: After recovery, certain operations trigger a failed
2596 assertion on a client.
2597 Details : Failing over an mds, using lconf -d --failover, while a
2598 client was doing a readdir() call would cause the client to
2599 LBUG after recovery completed and the readdir() was resent.
2601 Severity : enhancement
2603 Description: Default groups are now added by lconf
2604 Details : You can now run lconf --group <servicename> without having to
2605 manually add groups with lmc.
2608 Frequency : occasional
2610 Description: Nodes with an elan id of 0 trigger a failed assertion
2613 Frequency : always when accessing e.g. tty/console device nodes
2615 Description: tty and some other devices nodes cannot be used on lustre
2616 Details : file's private_data field is used by device data and lustre
2617 values in there got lost. New field was added to struct file to
2618 store fs-specific private data.
2621 Frequency : when exporting Lustre via NFS
2623 Description: NFSD failed occasionally when looking up a path component
2624 Details : NFSD is looking up ".." which was broken in ext3 directories
2625 that had grown large enough to become hashed.
2628 Frequency : Clusters with multiple interfaces not on the same subnet
2630 Description: Nodes will repeatedly try to reconnect to an interface which it
2631 cannot reach and report an error to the log.
2632 Details : Extra peer list entries will be created by lconf with some peers
2633 unreachable. lconf now validates the peer before adding it.
2636 Frequency : Only if a default stripe is set on the filesystem root.
2638 Description: Setting a default stripe on the filesystem root prevented the
2639 filesystem from being remounted.
2640 Details : The client was sending extra request flags in the root getattr
2641 request and did not allocate a reply buffer for the dir EA.
2644 Frequency : occasional, higher if lots of files are accessed by one client
2645 Bugzilla : 6159, 6097
2646 Description: Client trips assertion regarding lsm mismatch/magic
2647 Details : While revalidating inodes the VFS looks up inodes with ifind()
2648 and in rare cases can find an inode that is being freed.
2649 The ll_test_inode() code will free the lsm during ifind()
2650 when it finds an existing inode and then the VFS later attaches
2651 this free lsm to a new inode.
2655 Bugzilla : 6422, 7030
2656 Description: MDS deadlock between mkdir and client eviction
2657 Details : Creating a new file via mkdir or mknod (starting a transaction
2658 and getting the ns lock) can deadlock with client eviction
2659 (gets ns lock and trying to finish a synchronous transaction).
2662 Frequency : occasional
2663 Description: While starting a server, the fsfilt_ext3 module could not be
2665 Details : CFS's improved ext3 filesystem is named ldiskfs for 2.6
2666 kernels. Previously, lconf would still use the ext3 name
2667 when trying to load modules. Now, it will correctly use
2668 ext3 on 2.4 and ldiskfs on 2.6.
2670 Severity : enhancement
2671 Description: The default stripe count has been changed to 1
2672 Details : The interpretation of the default stripe count (0, to lfs
2673 or lmc) has been changed to mean striping across a single
2674 OST, rather than all available. For general usage we have
2675 found a stripe count of 1 or 2 works best.
2677 Severity : enhancement
2678 Description: Add support for compiling against Cray portals.
2679 Details : Conditional compiling for some areas that are different
2683 Frequency : occasional
2684 Bugzilla : 6409, 6834
2685 Description: Creating files with an explicit stripe count may lead to
2686 a failed assertion on the MDS
2687 Details : If some OSTs are full or unavailable, creating files may
2688 trigger a failed assertion on the MDS. Now, Lustre will
2689 try to use other servers or return an error to the
2693 Frequency : occasional
2695 Description: Multiple concurrent overlapping read+write on multiple SMP nodes
2696 caused lock timeout during readahead (since 1.4.2).
2697 Details : Processes doing readahead might match a lock that hasn't been
2698 granted yet if there are overlapping and conflicting lock
2699 requests. The readahead process waits on ungranted lock
2700 (original lock is CBPENDING), while OST waits for that process
2701 to cancel CBPENDING read lock and eventually evicts client.
2703 Severity : enhancement
2705 Description: Initial enabling of flock support for clients
2706 Details : Implements fcntl advisory locking and file status functions.
2707 This feature is provided as an optional mount flag (default
2708 off), and is NOT CURRENTLY SUPPORTED. Not all types of record
2709 locking are implemented yet, and those that are are not guaranteed
2710 to be completely correct in production environments.
2711 mount -t lustre -o [flock|noflock] ...
2714 Frequency : occasional
2716 Description: OSTs running 2.4 kernels but with extents enabled might trip an
2717 assertion in the ext3 JBD (journaling) layer.
2718 Details : The b_committed_data struct is protected by the big kernel lock
2719 in 2.4 kernels, serializing journal_commit_transaction() and
2720 ext3_get_block_handle->ext3_new_block->find_next_usable_block()
2721 access to this struct. In 2.6 kernels there is finer grained
2722 locking to improve SMP performance of the JBD layer.
2726 Description: Changes the "SCSI I/O Stats" kernel patch to default to "enabled"
2728 -----------------------------------------------------------------------------
2730 2005-05-05 Cluster File Systems, Inc. <info@clusterfs.com>
2732 NOTE: Lustre 1.4.2 uses an incompatible network protocol than previous
2733 versions of Lustre. Please update all servers and clients to
2734 version 1.4.2 or later at the same time. You must also run
2735 "lconf --write-conf {config}.xml" on the MDS while it is stopped
2736 to update the configuration logs.
2738 - fix for HPUX NFS client breakage when NFS exporting Lustre (5781)
2739 - mdc_enqueue does not need max_mds_easize request buffer on send (5707)
2740 - swab llog records of type '0' so we get proper header size/idx (5861)
2741 - send llog cancel req to DLM cancel portal instead of cb portal (5515)
2742 - fix rename of one directory over another leaking an inode (5953)
2743 - avoid SetPageDirty on 2.6 (5981)
2744 - don't re-add just-being-destroyed locks to the waiting list (5653)
2745 - when creating new directories, inherit the parent's custom
2746 striping settings if present parent (3048)
2747 - flush buffers from cache before direct IO in 2.6 obdfilter (4982)
2748 - don't hold i_size_sem in ll_nopage() and ll_ap_refresh_count (6077)
2749 - don't hold client locks on temporary worklist from l_lru (5666)
2750 - handle IO errors in 2.6 obdfilter bio completion routine (6046)
2751 - automatically evict dead clients (5921)
2752 - Update file size properly in create+truncate+fstat case (6196)
2753 - Do not unhash mountpoint dentries, do not allow removal of
2755 - Avoid lock ordering deadlock issue with write/truncate (6203,5654)
2756 - reserve enough journal credits in fsfilt_start_log for setattr (4554)
2757 - ldlm_enqueue freed-export error path would always LBUG (6149,6184)
2758 - don't reference lr_lvb_data until after we hold lr_lvb_sem (6170)
2759 - don't overwrite last_rcvd if there is a *_client_add() error (6086)
2760 - Correctly handle reads of files with no objects (6243)
2761 - lctl recover will also mark a device active if deactivate used (5933)
2763 - by default create 1 inode per 4kB space on MDS, per 16kB on OSTs
2764 - allow --write-conf on an MDS with different nettype than client (5619)
2765 - don't write config llogs to MDS for mounts not from that MDS (5617)
2766 - lconf should create multiple TCP connections from a client (5201)
2767 - init scripts are now turned off by default; run chkconfig --on
2768 lustre and chkconfig --on lustrefs to use them
2769 - upcalls are no longer needed for clients to recover to failover
2771 - add --abort-recovery option to lconf to abort recovery on device
2773 - add support for an arbitrary number of OSTs (3026)
2774 - Quota support protocol changes.
2775 - forward compatibility changes to wire structs (6007)
2776 - rmmod NALs that might be loaded because of /etc/modules.conf (6133)
2777 - support for mountfsoptions and clientoptions to the Lustre LDAP (5873)
2778 - improved "lustre status" script
2779 - initialize blocksize for non-regular files (6062)
2780 - added --disable-server and --disable-client configure options (5782)
2781 - introduce a lookup cache for lconf to avoid repeated DB scans (6204)
2782 - Vanilla 2.4.29 support
2783 - increase maximum number of obd devices to 520 (6242)
2784 - remove the tcp-zero-copy patch from the suse-2.4 series (5902)
2785 - Quadrics Elan drivers are now included for the RHEL 3 2.4.21 and
2786 SLES 9 2.6.5 kernels
2787 - limit stripes per file to 160 (the maximum EA size) (6093)
2789 2005-03-22 Cluster File Systems, Inc. <info@clusterfs.com>
2792 - don't LASSERT in ll_release on NULL lld with NFS export (4655, 5760)
2793 - hold NS lock when calling handle_ast_error->del_waiting_lock (5746)
2794 - fix setattr mtime regression from lovcleanup merge (4829, 5669)
2795 - workaround for 2.6 crash in ll_unhash_aliases (5687, 5210)
2796 - small ext3 extents cleanups and fixes (5733)
2797 - improved mballoc code, several small races and bugs fixed (5733, 5638)
2798 - kernel version 43 - fix remove_suid bugs in both 2.4 and 2.6 (5695)
2799 - avoid needless client->OST connect, fix handle mismatch (5317)
2800 - fix DLM error path that led to out-of-sync client, long delays (5779)
2801 - support common vfs-enforced mount options (nodev,nosuid,noexec) (5637)
2802 - fix several locking issues related to i_size (5492,5624,5654,5672)
2803 - don't move pending lock onto export if it is already evicted (5683)
2804 - fix kernel oops when creating .foo in unlinked directory (5548)
2805 - fix deadlock in obdfilter statistics vs. object create (5811)
2806 - use time_{before,after} to avoid timer jiffies wrap (5882)
2807 - shutdown --force/--failover stability (3607,3651,4797,5203,4834)
2808 - Do not leak request if server was not able to process it (5154)
2809 - If mds_open unable to find parent dir, make that negative lookup(5154)
2810 - don't create new directories with extent-mapping (5909, 5936)
2812 - fix lustre/lustrefs init scripts for SuSE (patch from Scali, 5702)
2813 - don't hold the pinger_sem in ptlrpc_pinger_sending_on_import
2814 - change obd_increase_kms to obd_adjust_kms (up or down) (5654)
2815 - lconf, lmc search both /usr/lib and /usr/lib64 for Python libs (5800)
2816 - support for RHEL4 kernel on i686 (5773)
2817 - provide error messages when incompatible logs are encountered (5898)
2819 2005-02-18 Cluster File Systems, Inc. <info@clusterfs.com>
2820 * version 1.4.0.10 (1.4.1 release candidate 1)
2822 - don't keep a lock reference when lock is not granted (4238)
2823 - unsafe list practices (rarely) led to infinite eviction loop (4908)
2824 - add per-fs limit of Lustre pages in page cache, avoid OOM (4699)
2825 - drop import inflight refcount on signal_completed_replay error (5255)
2826 - unlock page after async write error during send (3677)
2827 - handle missing objects in filter_preprw_read properly (5265)
2828 - no transno return for symlink open, don't save no-trasno open (3440)
2829 - don't try to complete elan receive that already failed (4012)
2830 - free RPC server reply state on error (5406)
2831 - clean up thread from ptlrpc_start_thread() on error (5160)
2832 - readahead could read extra page into cache that wasn't ejected (5388)
2833 - prevent races in class_attach/setup/cleanup/detach (5260)
2834 - don't dereference de->d_inode after l_dput of de (5458)
2835 - use "int" for stripe value returned from lock_to_stripe (5544)
2836 - mballoc allocation and error-checking fixes in 2.6 (5504)
2837 - block device patches to fix I/O request sizes in 2.6 (5482)
2838 - look up hostnames for IB nals (5602)
2839 - 2.6 changed lock ordering of 2 semaphores, caused deadlock (5654)
2840 - don't start multiple acceptors for the same port (5277)
2841 - fix incorrect LASSERT in mds_getattr_name (5635)
2842 - export a proc file for general "ping" checking (5628)
2843 - fix "lfs check" to not block when the MDS is down (5628)
2845 - service request history (4965)
2846 - put {ll,lov,osc}_async_page structs in a single slab (4699)
2847 - create an "evict_client" /proc entry on OSTs, like the MDS has
2848 - fix mount usage message, return errors per mount(8) (5168)
2849 - change grep [] to grep "[]" in tests so they work in more UMLs
2850 - fix ppc64/x86_64 spec to use %{_libdir} instead of /usr/lib (5389)
2851 - remove ancient LOV_MAGIC_V0 EA support (5047)
2852 - add "disk I/Os in flight" and "I/O req time" stats in obdfilter
2853 - align r/w RPCs to PTLRPC_MAX_BRW_SIZE boundary for performance (3451)
2854 - allow readahead allocations to fail when low on memory (5383)
2855 - mmap locking landed again, after considerable improvement (2828)
2856 - add get_hostaddr() to lustreDB.py for LDAP support (5459)
2858 2004-11-23 Cluster File Systems, Inc. <info@clusterfs.com>
2861 - send OST transaction number in read/write reply to free req (4966)
2862 - don't ASSERT in ptl_send_rpc() if we run out of memory (5119)
2863 - lock /proc/sys/portals/routes internal state, avoiding oops (4827)
2864 - the watchdog thread now runs as interruptible (5246)
2865 - flock/lockf fixes (but it's still disabled, pending 5135)
2866 - don't use EXT3 constants in llite code (5094)
2867 - memory shortage at startup could cause assertion (5176)
2869 - reorganization of lov code
2870 - single portals codebase
2872 - add extents/mballoc support (5025)
2873 - direct I/O reads in the obdfilter (4048)
2874 - kernel patches from LNXI for 2.6 (bluesmoke, perfctr, mtd, kexec)
2876 tbd Cluster File Systems, Inc. <info@clusterfs.com>
2879 - send OST transaction number in read/write reply to free req (4966)
2880 - don't ASSERT in ptl_send_rpc() if we run out of memory (5119)
2881 - lock /proc/sys/portals/routes internal state, avoiding oops (4827)
2882 - the watchdog thread now runs as interruptible (5246)
2883 - handle missing objects in filter_preprw_read properly (5265)
2884 - unsafe list practices (rarely) led to infinite eviction loop (4908)
2885 - drop import inflight refcount on signal_completed_replay error (5255)
2886 - unlock page after async write error during send (3677)
2887 - return original error code on reconstructed replies (3761)
2888 - no transno return for symlink open, don't save no-trasno open (3440)
2890 - add pid to ldlm debugging output (4922)
2891 - bump the watchdog timeouts -- we can't handle 30sec yet
2892 - extra debugging for orphan dentry/inode bug (5259)
2894 2004-11-16 Cluster File Systems, Inc. <info@clusterfs.com>
2897 - fix TCP_NODELAY bug, which caused extreme perf regression (5134)
2898 - allocate qswnal tx descriptors singly to avoid fragmentation (4504)
2899 - don't LBUG on obdo_alloc() failure, use OBD_SLAB_ALLOC() (4800)
2900 - fix NULL dereference in /proc/sys/portals/routes (4827)
2901 - allow failed mdc_close() operations to be interrupted (4561)
2902 - stop precreate on OST before MDS would time out on it (4778)
2903 - don't send partial-page writes before EOF from client (4410)
2904 - discard client grant for sub-page writes on large-page clients (4520)
2905 - don't free dentries not owned by NFS code, check generation (4806)
2906 - fix lsm leak if mds_create_objects() fails (4801)
2907 - limit debug_daemon file size, always print CERROR messages (4789)
2908 - use transno after validating reply (3892)
2909 - process timed out requests if import state changes (3754)
2910 - update mtime on OST during writes, return in glimpse (4829)
2911 - add mkfsoptions to LDAP (4679)
2912 - use ->max_readahead method instead of zapping global ra (5039)
2913 - don't interrupt __l_wait_event() during strace
2915 - add software watchdogs to catch hung threads quickly (4941)
2916 - make lustrefs init script start after nfs is mounted
2917 - fix CWARN/ERROR duplication (4930)
2918 - return async write errors to application if possible (2248)
2919 - add /proc/sys/portal/memused (bytes allocated by PORTALS_ALLOC)
2920 - print NAL number in %x format (4645)
2921 - update barely-supported suse-2.4.21-171 series (4842)
2922 - support for sles 9 %post scripts
2923 - support for building 2.6 kernel-source packages
2924 - support for sles km_* packages
2926 2004-10-07 Cluster File Systems, Inc. <info@clusterfs.com>
2929 - ignore -ENOENT errors in osc_destroy (3639)
2930 - notify osc create thread that OSC is being cleaned up (4600)
2931 - add nettype argument for llmount in #5d in conf-sanity.sh (3936)
2932 - reconstruct ost_handle() like mds_handle() (4657)
2933 - create a new thread to do import eviction to avoid deadlock (3969)
2934 - let lconf resolve symlinked-to devices (4629)
2935 - don't unlink "objects" from directory with default EA (4554)
2936 - hold socknal file ref over connect in case target is down (4394)
2937 - allow more than 32000 subdirectories in a single directory (3244)
2938 - fix blocks count for O_DIRECT writes (3751)
2939 - OST returns ENOSPC from object create when no space left (4539)
2940 - don't send truncate RPC if file size isn't changing (4410)
2941 - limit OSC precreate to 1/2 of value OST considers bogus (4778)
2942 - bind to privileged port in socknal and tcpnal (3689)
2944 - rate limit CERROR/CWARN console message to avoid overload (4519)
2945 - GETFILEINFO dir ioctl returns LOV EA + MDS stat in 1 call (3327)
2946 - basic mmap support (3918)
2947 - kernel patch series update from b1_4 (4711)
2949 2004-09-16 Cluster File Systems, Inc. <info@clusterfs.com>
2952 - avoid crash during MDS cleanup with OST shut down (2775)
2953 - fix loi_list_lock/oig_lock inversion on interrupted IO (4136)
2954 - don't use bad inodes on the MDS (3744)
2955 - dynamic object preallocation to improve recovery speed (4236)
2956 - don't hold spinlock over lock dumping or change debug flags (4401)
2957 - don't zero obd_dev when it is force cleaned (3651)
2958 - print grants to console if they go negative (4431)
2959 - "lctl deactivate" will stop automatic recovery attempts (3406)
2960 - look for existing locks in ldlm_handle_enqueue() (3764)
2961 - don't resolve lock handle twice in recovery avoiding race (4401)
2962 - revalidate should check working dir is a directory (4134)
2964 - don't always mark "slow" obdfilter messages as errors (4418)
2966 2004-08-24 Cluster File Systems, Inc. <info@clusterfs.com>
2969 - don't close LustreDB during write_conf until it is done (3860)
2970 - fix typo in lconf for_each_profile (3821)
2971 - allow dumping logs from multiple threads at one time (3820)
2972 - don't allow multiple threads in OSC recovery (3812)
2973 - fix debug_size parameters (3864)
2974 - fix mds_postrecov to initialize import for llog ctxt (3121)
2975 - replace config semaphore with spinlock (3306)
2976 - be sure to send a reply for a CANCEL rpc with bad export (3863)
2977 - don't allow enqueue to complete on a destroyed export (3822)
2978 - down write_lock before checking llog header bitmap (3825)
2979 - recover from lock replay timeout (3764)
2980 - up llog sem before sending rpc (3652)
2981 - reduce ns lock hold times when setting kms (3267)
2982 - change a dlm LBUG to LASSERTF, to maybe learn something (4228)
2983 - fix NULL deref and obd_dev leak on setup error (3312)
2984 - replace some LBUG about llog ops with error handling (3841)
2985 - don't match INVALID dentries from d_lookup and spin (3784)
2986 - hold dcache_lock while marking dentries INVALID and hashing (4255)
2987 - fix invalid assertion in ptlrpc_set_wait (3880)
2989 - add libwrap support for the TCP acceptor (3996)
2990 - add /proc/sys/portals/routes for non-root route listing (3994)
2991 - allow setting MDS UUID in .xml (2580)
2992 - print the stack of a process that LBUGs (4228)
2994 2004-07-14 Cluster File Systems, Inc. <info@clusterfs.com>
2997 - don't cleanup request in ll_file_open() on failed MDS open (3430)
2998 - make sure to unset replay flag from failed open requests (3440)
2999 - if default stripe count is 0, use OST count for inode size (3636)
3000 - update parent mtime/ctime on client for create/unlink (2611)
3001 - drop dentry ref in ext3_add_link from open_connect_dentry (3266)
3002 - free recovery state on server during a forced cleanup (3571)
3003 - unregister_reply for resent reqs (3063)
3004 - loop back devices mounting and status check on 2.6 (3563)
3005 - fix resource-creation race that can provoke i_size == 0 (3513)
3006 - don't try to use bad inodes returned from MDS/OST fs lookup (3688)
3007 - more debugging for page-accounting assertion (3746)
3008 - return -ENOENT instead of asserting if ost getattr+unlink race (3558)
3009 - avoid deadlock after precreation failure (3758)
3010 - fix race and lock order deadlock in orphan handling (3450, 3750)
3011 - add validity checks when grabbing inodes from l_ast_data (3599)
3013 - add /proc/.../recovery_status to obdfilter (3428)
3014 - lightweight CDEBUG infrastructure, debug daemon (3668)
3015 - change default OSC RPC parameters to be better on small clusters
3016 - turn off OST read cache for files smaller than 32MB
3017 - install man pages and include them in rpms (3100)
3018 - add new init script for (un)mounting lustre filesystems (2593)
3019 - run chkconfig in %post for init scripts (3701)
3020 - drop scimac NAL (unmaintained)
3022 2004-06-17 Cluster File Systems, Inc. <info@clusterfs.com>
3025 - clean kiobufs before and after use (3485)
3026 - strip trailing '/'s before comparing paths with /proc/mounts (3486)
3027 - remove assertions to work around "in-flight rpcs" recovery bug (3063)
3028 - change init script to fail more clearly if not run as root (1528)
3029 - allow clients to reconnect during replay (1742)
3030 - fix ns_lock/i_sem lock ordering deadlock for kms update (3477)
3031 - don't do DNS lookups on NIDs too small for IP addresses (3442)
3032 - re-awaken ptlrpcd if new requests arrive during check_set (3554)
3033 - fix cond_resched (3554)
3034 - only evict unfinished clients after recovery (3515)
3035 - allow bulk resend, prevent data loss (3570)
3036 - dynamic ptlrpc request buffer allocation (2102)
3037 - don't allow unlinking open directory if it isn't empty (2904)
3038 - set MDS/OST threads to umask 0 to not clobber client modes (3359)
3039 - remove extraneous obd dereference causing LASSERT failure (3334)
3040 - don't use get_cycles() when creating temp. files on the mds (3156)
3041 - hold i_sem when setting i_size in ll_extent_lock() (3564)
3042 - handle EEXIST for set-stripe, set proper directory name (3336)
3044 - servers can dump a log evicting a client - lustre.dump_on_timeout=1
3045 - fix ksocknal_fmb_callback() error messages (2918)
3047 2004-05-27 Cluster File Systems, Inc. <info@clusterfs.com>
3050 - don't copy lvb into (possibly NULL) reply on error (2983)
3051 - don't deref dentry after dput, don't free lvb on error (2922)
3052 - use the kms to determine writeback rpc length (2947)
3053 - increment oti_logcookies when osc is inactive (2948)
3054 - update client's i_blocks count via lvb messages (2543)
3055 - handle intent open/close of special files properly (1557)
3056 - mount MDS with errors=remount-ro, like obdfilter (2009)
3057 - initialize lock handle to avoid ASSERT on error cleanup (3057)
3058 - don't use cancelling-locks' kms values (2947)
3059 - use highest lock extent for kms, not last one (2925)
3060 - don't dereference ERR_PTR() dentry in error handling path (3107)
3061 - fix thread race in portals_debug_dumplog() (3122)
3062 - create lprocfs device entries at setup instead of at attach (1519)
3063 - common AST error handler, don't evict client on completion race (3145)
3064 - zero nameidata in detach_mnt in 2.6 (3118)
3065 - verify d_inode after revalidate_special is valid in 2.6 (3116)
3066 - use lustre_put_super() to handle zconf unmounts in 2.6 (3064)
3067 - initialize RPC timeout timer earlier for 2.6 (3219)
3068 - don't dereference NULL reply buffer if mdc_close was never sent (2410)
3069 - print nal/nid for unknown nid (3258)
3070 - additional checks for oscc recovery before doing precreate (3284)
3071 - fix ll_extent_lock() error return code for 64-bit systems (3043)
3072 - don't crash in mdc_close for bad permissions on open (3285)
3073 - zero i_rdev for non-device files (3147)
3074 - clear page->private before handing to FS, better assertion (3119)
3075 - tune the read pipeline (3236)
3076 - fix incorrect decref of invalidated dentry (2350)
3077 - provide read-ahead stats and refine rpc in flight stats (3328)
3078 - don't hold journal transaction open across create RPC (3313)
3079 - update atime on MDS at close time (3265)
3080 - close LDAP connection when recovering to avoid server load (3315)
3081 - update iopen-2.6 patch with fixes from 2399,2517,2904 (3301)
3082 - don't leak open file on MDS after open resend (3325)
3083 - serialize filter_precreate and filter_destroy_precreated (3329)
3084 - loop device shouldn't call sync_dev() for nul device (3092)
3085 - clear page cache after eviction (2766)
3086 - resynchronize MDS->OST in background (2824)
3087 - refuse to mount the same filesystem twice on same mountpoint (3394)
3088 - allow llmount to create routes for mounting behind routers (3320)
3089 - push lock cancellation to blocking thread for glimpse ASTs (3409)
3090 - don't call osc_set_data_with_check() for TEST_LOCK matches (3159)
3091 - fix rare problem with rename on htree directories (3417)
3093 - allow default OST striping configuration per directory (1414)
3094 - fix compilation for qswnal for 2.6 kernels (3125)
3095 - increase maximum number of MDS request buffers for large systems
3096 - change liblustreapi to be useful for external progs like lfsck (3098)
3097 - increase local configuration timeout for slow disks (3353)
3098 - allow configuring ldlm AST timeout - lustre.ldlm_timeout=<seconds>
3100 2004-03-22 Cluster File Systems, Inc. <info@clusterfs.com>
3103 - fixes for glimpse AST timeouts / incorrectly 0-sized files (2818)
3104 - don't overwrite extent policy data in reply if lock was blocked (2901)
3105 - drop filter export grants atomically with removal from device (2663)
3106 - del obd_self_export from work_list in class_disconnect_exports (2908)
3107 - don't LBUG if MDS recovery times out during orphan cleanup (2530)
3108 - swab reply message in mdc_close, other PPC fixes (2464)
3109 - fix destroying of named logs (2325)
3110 - overwrite old logs when running lconf --write_conf (2264)
3111 - bump LLOG_CHUNKSIZE to 8k to allow for larger clusters (2306)
3112 - fix race in target_handle_connect (2898)
3113 - mds_reint_create() should take same inode create lock (2926)
3114 - correct journal credits calculated for CANCEL_UNLINK_LOG (2931)
3115 - don't close files for self_export to avoid uninitialized obd (2936)
3116 - allow MDS with the same name as client node (2939)
3117 - hold dentry reference for closed log files for unlink (2325)
3118 - reserve space for all logs during transactions (2059)
3119 - don't evict page beyond end of stripe extent (2925)
3120 - don't oops on a deleted current working directory (2399)
3121 - handle hard links to targets without a parent properly (2517)
3122 - don't dereference NULL lock when racing during eviction (2867)
3123 - don't grow lock extents when lots of conflicting locks (2919)
3125 2004-03-04 Cluster File Systems, Inc. <info@clusterfs.com>
3128 - account for cache space usage on clients to avoid data loss (974)
3129 - lfsck support in lustre kernel code (2349)
3130 - reduce journal credits needed for BRW writes (2370)
3131 - orphan handling to avoid losing space on client/server crashes
3132 - ptlrpcd can be blocked, stopping ALL progress (2477)
3133 - use lock value blocks to assist in proper KMS, faster stat (1021)
3134 - takes i_sem instead of DLM locks internally on obdfilter (2720)
3135 - recovery for initial connections (2355)
3136 - fixes for mds_cleanup_orphans (1934)
3137 - abort_recovery crashes MDS in b_eq (mds_unlink_orphan) (2584)
3138 - block all file creations until orphan recovery completes (1901)
3139 - client remove rq_connection from request struct (2423)
3140 - conf-sanity test_5, proper cleanup in umount log not availale (2640)
3141 - recovery timer race (2670)
3142 - mdc_close recovey bug (2532)
3143 - ptlrpc cleanup bug (2710)
3144 - mds timeout on local locks (2588)
3145 - namespace lock held during RPCs (2431)
3146 - handle interrupted sync write properly (2503)
3147 - don't try to handle a message that hasn't been replied to (2699)
3148 - client assert failure during cleanup after abort recovery (2701)
3149 - leak mdc device after failed mount (2712)
3150 - ptlrpc_check_set allows timedout requests to complete (2714)
3151 - wait for inflight reqs when ptlrpcd finishes (2710)
3152 - make sure unregistered services are removed from the srv_list
3153 - reset bulk XID's when resending them (caught by 1138 test)
3154 - unregister_bulk after timeout
3155 - fix lconf error (2694)
3156 - handle write after unfinished setstripe, stripe-only getstripe (2388)
3157 - readahead locks pages, leaves pending causing memory pressure (2673)
3158 - increase OST request buffers to 4096 on large machines (2729)
3159 - fix up permission of existing directories in simple_mkdir (2661)
3160 - init deleted item, add assertions ptlrpc_abort_inflight() (2725)
3161 - don't assign transno to errored transactions (2742)
3162 - don't delete objects on OST if given a bogus objid from MDS (2751)
3163 - handle large client PAGE_SIZE readdir on small PAGE_SIZE MDS (2777)
3164 - if rq_no_resend, then timeout request after recovery (2432)
3165 - fix MDS llog_logid record size, 64-bit array alignment (2733)
3166 - don't call usermode_helper from ptlrpcd, DEFAULT upcall (2773)
3167 - put magic in mount.lustre data, check for bad/NULL mount data (2529)
3168 - MDS recovery shouldn't delete objects that it has given out (2730)
3169 - if enqueue arrives after completion, don't clobber LVB (2819)
3170 - don't unlock pages twice when trigger_group_io returns error (2814)
3171 - don't deref NULL rq_repmsg if ldlm_handle_enqueue failed (2822)
3172 - don't write pages to disk if there was an error (1450)
3173 - don't ping imports that have recovery disabled (2676)
3174 - take buffered bytes into account when balancing socknal conn (2817)
3175 - hold a DLM lock over readdir always, use truncate_inode_pages (2706)
3176 - reconnect unlink llog connection after MDS reconnects to OST (2816)
3177 - remove little-endian swabbing of llog records (1987)
3178 - set/limit i_blksize to LL_MAX_BLKSIZE on client (2884)
3179 - retry reposting request buffers if they fail (1191)
3180 - grow extent at grant time to avoid granting a revoked lock (2809)
3181 - lock revoke doesn't evict page if covered by a second lock (2765)
3182 - disable VM readahead to avoid reading outside lock extents (2805)
3184 - return LL_SUPER_MAGIC from statfs for the filesystem type (1972)
3185 - updated kernel patches for hp-2.4.20 kernel (2681)
3187 2004-02-07 Cluster File Systems, Inc. <info@clusterfs.com>
3190 - fix truncated write corruption (2366)
3191 - fix for failed assertion in iopen_connect_dentry (1792,2517)
3193 - don't flag the ptlrpcd thread with PF_MEMALLOC (2636)
3194 - ensure len(uuid) < 37 in lmc (1171)
3195 - fix ia64 OOPS in llog_test (2255)
3196 - zero end of page at obdfilter for partial page writes (2648)
3197 - don't leave stale dentries around after renames (bug 2428)
3198 - fix timeouts when evicting a client with a single lock held (2642)
3199 - set deadline for the initial HELLO message to drain (2634)
3200 - print out dotted-quad IP addresses in the socknal (2302)
3202 - additional debugging for MDS client eviction problem (2443)
3203 - fix mkfsoptions support for osts (2603, 2604)
3205 2004-01-27 Cluster File Systems, Inc. <info@clusterfs.com>
3208 - add series for the vanilla 2.6.0 kernel
3209 - add series for the vanilla 2.4.24 kernel
3210 - add series for a cray x86/64 UL kernel drop
3211 - fix xattr patches for the vanilla 2.4.19 series
3213 - generate true UUIDs in lmc (1171)
3214 - have portals stack dumping break in UML (2466)
3215 - avoid bad dchild deref; avoid inum lock w/o creation (2362)
3216 - allocate with _NOFS in ldlm to avoid deadlock (1933)
3217 - wake callback waiting threads on client eviction (2460)
3218 - Add --ptldebug and --subsystem to lmc (1719)
3219 - update assertion to allow safe interrupt allocation
3220 - set rq_no_resend for cancel requests (2432)
3221 - recalculate ptlrpcd timeout after resend (2494)
3222 - call vfs_rmdir when removing pending directories (2368)
3223 - fix renaming a file to itself (2429)
3224 - lmc creates a default one-stripe lov (2454)
3225 - expand procfs space to handle large clusters (2326)
3226 - increase UML stack to avoid overflow
3227 - update lconf's list of debug and subsystem masks
3228 - fix lfs find --obd (2510)
3229 - /proc tunable for disabling filter read caching (2591)
3230 - stop rpm packages from altering slapd.conf (2301)
3231 - disable nagle in the socknal under 0conf (2578)
3232 - choose mds inode size based on stripe count (2572)
3233 - fix kernel-source rpm problems (2516)
3235 - add --disable-doc to avoid pdf generation (2421)
3236 - update documentation, tests, type-os, comments
3237 - avoid format warnings on ia64
3238 - remove the TOE NAL
3239 - tiny code cleanups by removing unused fields
3241 2004-01-07 Cluster File Systems, Inc. <info@clusterfs.com>
3244 - fix obvious semaphore misuse in as-yet-unused setattr path (2348)
3245 - remove the most blatant lies from BUILDING file (2371)
3246 - change default debug level to reasonable production setting
3247 - reduce client side cache size to reduce cache flush time
3248 - reduce max RPCs in flight to avoid unnecessary file fragmentation
3249 - make TCP zerocopy and pinger support enabled by default (2476)
3250 - sync writes completed after process exits caused crashes (2319)
3251 - maintain correct mount count on the MDS (2356)
3252 - backout 1557, because 2316 wasn't really fixed
3253 - better file I/O statistics gathering in /proc
3254 - don't take unnecessary, deadlock-inducing bug in readpage (2383)
3255 - another kernel patch to fix zero-copy TCP function export
3256 - don't take duplicate lock when processing re-sent getattr (2420)
3257 - lctl uses obd_self_export instead of creating new conn (2353)
3258 - MDS/OST recovery case which requires object creation asserted (2425)
3259 - move lfs from /usr/sbin to /usr/bin in packages
3260 - fix race between mds_client_add and mds_client_free (2417)
3261 - use kmalloc instead of slabs in portals (2430)
3262 - don't create duplicate records when a failover MDS is present (2442)
3263 - remove unnecessary mount age check (2332)
3264 - don't remove directory inodes from locks prematurely (2451)
3265 - don't break if MDS service name is the same as hostname (2103)
3266 - fix races in client write RPC generation when cache full (2482)
3268 2003-12-13 Cluster File Systems, Inc. <info@clusterfs.com>
3271 - remove now-unused request->rq_obd (278)
3272 - if an allocation fails, print out how much memory we've used (1933)
3273 - use PORTAL_SLAB_ALLOC for structures, to get GFP_MEMALLOC (1933)
3274 - add the "configurable stack size" patch to most series files (1256)
3275 - ability to write large log records, for 100+ OST configs (2306)
3276 - fix NULL deref when filter_prep fails (2314)
3277 - fix operator precedence error in filter_sync
3278 - dynamic allocation of socknal TX descriptors (2315)
3279 - fix a missed case in the GFP_MEMALLOC patch, can cause deadlock (2310)
3280 - fix gcc 2.96 compilation problem in xattr kernel patch (2294)
3281 - ensure that CWARN messages in Portals always get to the syslog
3282 - __init/__exit are not for prototype decls (ldlm_init/exit)
3283 - x86-64 compile warning fixes
3284 - fix gateway LMC keyword conflict (2318)
3285 - fix MDS lock inversions in getattr/reint paths (1844)
3286 - fix a rare lock re-ordering bug, which caused deadlock (2322)
3287 - fix i_sem/journal inversion in fsfilt_ext3_write_record (2306)
3288 - DLM race condition prevented some lock evictions (2328)
3289 - ENOMEM detection and retry on socknal sends (2230)
3290 - use GFP_NOFS throughout Lustre, to combat ENOMEM (2230)
3291 - move osc_rpcd into ptlrpc, for use in MDC and others (2329)
3292 - protect MDS inode fsdata with stronger locking; fixes assertion (2313)
3293 - better error messages when a client is rejected during recovery (1505)
3294 - avoid cancelling locks which were never granted, after failure (2330)
3295 - fix i_sem/journal inversion in mds_client_add (2333)
3296 - fix truncate/getattr lock cycle deadlock (2334)
3297 - use rpcd to send close; allows resend after timeout, avoid leak (1897)
3298 - fix two rare exit paths which could leak an l_lock() ref (2321)
3299 - fencepost error in MDS/OST orphan recovery (2226)
3300 - make log record alignment 8 bytes (1988)
3301 - lstripe now fails when requested offset > ost_count (2237)
3302 - ensure that all kernel series have a complete list.h (1607)
3303 - fix crashes in special-file operations (2316)
3304 - lctl create/brw OID mismatch, caused by obsolete filter loop (2339)
3306 - allow configurable automake binary, for testing new versions
3307 - small update to the lfs documentation
3309 2003-12-03 Cluster File Systems, Inc. <info@clusterfs.com>
3311 * fix negative export reference count in fsfilt_sync (2312)
3313 2003-12-01 Cluster File Systems, Inc. <info@clusterfs.com>
3314 * release candidate 0.9.1
3316 - orphans are moved into the PENDING directory for possible recovery
3317 - replayed opens now open by fid for orphan/rename safety (1042)
3318 - last close of an orphan inode generates a transno (683)
3319 - chdir() and mount() now pin the directory entry (1020)
3320 - avoid CERROR in normal ll_setattr_raw() error case (1500)
3321 - discard very old requests without processing them (1502)
3322 - remove some common, well-understood CERRORs (1505)
3323 - require O_DIRECT I/O to be page-sized to workaround IA64 crash (1609)
3324 - clear "grant" flags in OST replies until OST grant code lands (1644)
3325 - fix read performance by not clobbering i_blksize on client (1598)
3326 - fix __ldlm_handle2lock oops by not dereferencing lock after PUT (1625)
3327 - make LRU size a /proc tunable, clears locks when reduced (707)
3328 - fix some lprocfs rot that prevented ptlbd from loading (1732)
3329 - server locks take references on exports now (1558)
3330 - build fixes for 2.4.20-rh trees (1663)
3331 - return an error from lov_create if all OSCs are inactive (1751)
3332 - fix import levels when a reconnect happens without a timeout (1597)
3333 - exit early from mds_open if we get a lookup error (1749)
3334 - partial page read at EOF wouldn't wait for disk before sending (1642)
3335 - avoid NULL deref in obdfilter when reading page past EOF (1592)
3336 - avoid LASSERT in ll_intent_lock if server failed very early (1090)
3337 - fix LBUG in ll_it_open_error with rc = -2 (1861)
3338 - write/truncate lock inversion (1639)
3339 - Don't auto-load obdclass, portals modules during cleanup (1495)
3340 - fix timestamps from jumping to "now" (1763)
3341 - extra journal assertions (1648)
3342 - add an extra multiunlink test (1771)
3343 - fix read_record/write_record API (1776)
3344 - fix leak of offset_extent, possible incorrect i_size later (1772)
3345 - fix lasserts in mis-matched transnos during open-unlink testing (1541)
3346 - Debugging for the kqswnal_get_idle_tx problems (1820)
3347 - Allow recovery to be attempted multiple times (1536)
3348 - Write out MDS last_rcvd file after it is first created (1600)
3349 - Fix tx_descriptor leak in failed transmit situations (1827)
3350 - ext3 journaling fixes for assertion failure after IO error (1871)
3351 - class_export_put() on freed export after completion AST error (1896)
3352 - Fix revalidate looping in VFS (1322)
3353 - Don't access a freed export during MDS_REINT timeout (1521)
3354 - Add open-unlink recovery support on the MDS (1673,1764)
3355 - Return an error if no MDS data was read from last_rcvd (1946)
3356 - Fix for lookup "." or ".." crash on error (1932,1931,1935)
3357 - Don't setup a disk device that doesn't match exported UUID (317)
3358 - Reduce bulk RPC timeout to avoid cascading client/OST failures (1845)
3359 - avoid committing NULL handle in force close
3360 - local.sh is now a one-stripe LOV configuration
3361 - POSIX utime.4 -EPERM on FIFO not owned by user (56)
3362 - fix ext3 htree duplicate directory entry corruption (1516)
3363 - POSIX creat.13, fstat.1, open.18, stat.3 new file atime/mtime (2020)
3364 - update to new LOV EA format (2097)
3365 - interoperability for different PAGE_SIZE/wordsize (686,1821,1343,2042)
3367 2003-06-15 Phil Schwan <phil@clusterfs.com>
3370 - imports and exports cleanup too early, need refcounts (349, 879, 1045)
3371 - per-import/export recovery handling (958, 931, 959)
3372 - multiple last-rcvd slots, for serving multiple FSes (949)
3373 - connections are again shared between multiple imp/exports (963, 964)
3374 - "umount -f" would hang if any requests needed to be sent (393, 978)
3375 - avoid pinning large req buffer by copying for queued messages (989)
3376 - add "uuid" to "lctl device" command to help upcalls (991)
3377 - "open" RPCs with transnos would confuse recovery counters (1037)
3378 - do proper endian conversion of all wire messages (288, 340, 891)
3379 - remove OST bulk get LBUGs, fix ost_brw_write cleanup (1126)
3380 - call waiting locks callback from LDLM recovery thread (1127, 1151)
3381 - fix ptlrpc_connection leak in target_handle_connect (1174)
3382 - fix import refcounting bug in OST and MDS cleanup (1134)
3383 - if an invalid-at-open-time OSC returned before close(), LBUG (1150)
3384 - fix very unlikely obd_types race condition (501)
3385 - remove osc_open hack for echo_client (1187)
3386 - we leaked exports/dlmimps for forcibly disconnected clients (1143)
3387 - a failure in read_inode2 leads to deadlock (1139)
3388 - cancel ack-locks as soon as transaction is committed (1072)
3389 - fix major leaks and crashes in the bulk I/O path (937, 1057)
3390 - make sure to commitrw after any preprw to avoid deadlock (1162)
3391 - failing to execute a file in a lustre FS would lock inode (1203)
3392 - small DEBUG_REQ fix to avoid dereferencing a NULL (1227)
3393 - don't ASSERT while cleaning up an incompletely-setup obd (1248)
3394 - obd_uuid2tgt would walk off the end of the list (1255)
3395 - on IA64 the osc would give portals incorrect bulk size (1258)
3396 - fix debug daemon ioctl interface; allows daemon on ia64 (1274)
3397 - fix lock inversion caused by new llite matching code (1282)
3398 - limit the number of dirty pages on a client to 10MB (1286)
3399 - timed out locks were not being corrected cancelled (1289)
3400 - fix O_DIRECT above 4GB on IA-32 (1292)
3401 * major user-visible changes
3402 - fail out/fail over policy now controlled by the upcall (993)
3404 - add OBD_PING to check server availability and failure (954)
3405 - lustre messages are now sent in sending host order (288, 340, 891)
3406 - add eadatalen to MDS getattr reply (340)
3407 - OST read replies may contain second buffer, with per-page status (593)
3409 2003-03-11 Phil Schwan <phil@clusterfs.com>
3412 - LDLM_DEBUG macro fix, for gcc 3.2 (850)
3413 - failed open()s could cause deadlock; fixed (867, 869)
3414 - stop cancelling OST locks when files are closed (481)
3415 - overlapping XID spaces caused network corruption (851, 853)
3416 - fix unsafe fsfilt counter arithmetic; change to atomic_t
3417 - setattr_raw added, to do single-RPC, server-side setattrs
3418 - lmc/lconf syntax change for OST UUIDs
3419 - fix crashy race condition between ptlrpc_free_req and osc_close
3420 - don't use request in mdc_enqueue if we hit a timeout (889)
3421 - don't set the inode i_size for regular files from the MDS (896)
3422 - handle out of order completion AST (842)
3423 - don't LBUG if a lock request times out after receiving AST (913)
3424 - avoid d_rehash race in ll_find_alias by rehashing inside dcache_lock
3425 - if a bad lock AST arrives, send an error instead of dropping entirely
3426 - return 0 from revalidate2 if ll_intent_lock returns -EINTR (912)
3427 - fix leak in bulk IO when only partially completed (899, 900, 926)
3428 - fix O_DIRECT for ia64 (55)
3429 - (almost) eliminate Lustre-kernel-thread effects on load average (722)
3430 - C-z after timeout could hang a process forever; fixed (977)
3432 - client-side I/O cache (678, 924, 929, 941, 970)
3434 - READPAGE and SETATTRs which don't take server-side locks get
3437 2003-02-11 Phil Schwan <phil@clusterfs.com>
3440 - Fix ldlm_lock_match on the MDS to avoid matching remote locks (592)
3441 - Fix fsfilt_extN_readpage() to read a full page of directory
3442 entries, or fake the remainder if PAGE_SIZE != blocksize (500)
3443 - Avoid extra mdc_getattr() in ll_intent_lock when possible (534, 604)
3444 - Fix imbalanced LOV object allocation and out-of-bound access (469)
3445 - Most intent operations were removed, in favour of a new RPC mode
3446 that does a single RPC to the server and bypasses most of the VFS
3447 - All LDLM resource ID arrays were removed in favour of ldlm_res_id
3448 - Aggressively cancel local locks on DLM servers
3449 - mds_reint_unlink sends EA to the client if it's the last nlink.
3450 client uses that EA to unlink OST objects.
3451 - mds_reint_{rename,unlink,link} were rewritten to take ordered locks
3452 - recursive symlinks were fixed (439)
3453 - fixed NULL deref in DEBUG_REQ
3454 - filter_update_lastobjid no longer calls sync, which annoyed extN
3455 - fixed multi-client small-writes to a single file problem (445)
3456 - fixed mtime updates during file writes (607)
3457 - fixed vector writes on obdfilter causing problems when ENOSPC (670)
3458 - fixed bug in obd_brw_read/write() (under guise of testing 367)
3459 - fixed Linux OST size reporting problem (444, 656)
3460 - OST now updates object mtime with writes or setattr (607, 619)
3461 - client verifies file size before zeroing page past EOF (445)
3462 - OST now writes last allocated objid to disk with allocation (108)
3463 - LOV on echo now works (409)
3465 - mds_reint_unlink sends a new buffer, with the EA included. this
3466 buffer is only valid if body->valid & OBD_MD_FLEASIZE, which is only
3467 set if a regular file was being unlinked, and it was the last link
3468 - use PtlGet from the target for bulk writes (315)
3469 - OST now updates object mtime with writes or setattr (607, 619)
3470 - LDLM now has a grant-time callback to revalidate locked items, if
3472 - Many MDS operations were reorganized to combat race conditions
3474 - Merge b_intel branch (updated lprocfs code) - now at /proc/fs/lustre
3475 - configure check to avoid gcc version 2.96 20000731-2.96-98) (606)
3477 2003-01-06 Andreas Dilger <adilger@clusterfs.com>
3480 - Fully reactivate OST imports after reconnection (512, others)
3481 - Make sure client sees our -ENOTCONN from mds_handle (513 - partial)
3482 - More graceful error handling for truncating on dead OST (515)
3483 - Don't error out unless we're actually accessing dead stripes (474)
3484 - Fix garbage sizes when stripes are missing (410)
3485 - LRU counters were broken, causing constant lock purge (433, 432)
3486 - garbage on read from stripes with failed OSTs (441)
3487 - mark OSCs as active before reconnecting during recovery (438)
3488 - lov_enqueue and lov_cancel need to handle inactive OSTs (403)
3489 - lfind did not preserve OST order in output (443)
3490 - symlinks cause hung clients, incorrect data (439)
3491 - stop dereferencing request after dropping refcount (457)
3492 - don't LASSERT(spin_is_locked) on non-SMP (455)
3493 - fixes for many rename() bugs
3494 - fstat didn't correctly synchronize attributes (399)
3495 - server must handle lock cancellation during blocking AST prep (487)
3496 - bulk descriptors were free()d too soon (511)
3497 - fix paths in lconf, which would load incorrect modules (451, 507)
3498 - fix confusing lconf 'host not found' error message (386)
3499 - fix lock order deadlock on OST (O/R i_sem before journal ops, 478)
3500 - fix race condition in mdc_blocking_ast() for inode access (526)
3501 - fix lov_unpackmd() unpacking wrong number of stripes (537)
3502 - fix lov_set_osc_active() marking wrong OSC inactive (440)
3503 - fix bad lstripe lov_unpackmd() assertion (fix layering too) (527)
3504 - fix multiple writes of stripe MD to MDS (358, maybe 519)
3505 - fix lstripe in several ways (kernel side) (527)
3506 - fix request leak in ldlm_cli_enqueue (262)
3507 - incorrect OSC was marked inactive after OST failure
3508 - call mds_fs_cleanup before unmounting filesystem (524)
3509 - fix races between taking ns_lock and ldlm_lock_change_resource
3510 - fix races updating LOV export open file list
3511 - fix lov_enqueue error path, avoid decref-ing bad lock handle
3512 - fix recovery NULL deref in ldlm_cli_cancel_unused
3513 - fix some DLM races by using new hash table for lock handles (419)
3514 - permit the client to specify desired inodes, at replay
3515 - duplicate requests when we queue them for replay reintegration
3516 - fix last_rcvd offset calculation
3517 - sync after each recovered transaction, so we always make progress
3518 - never, not always, ERESTART requests without transnos
3519 - store the lov_desc in the MDS, so we don't depend on getlovinfo to
3521 - skip replay if the MDS says that the client is already connected
3522 - don't check for a recovery-enabled export to match lctl's UUID
3523 - don't INC_USE_COUNT for phantom exports
3524 - don't crash when cleaning up phantom exports (567)
3525 - don't double-finish or set replay data for errored mdc_open requests
3526 - abort requests when they time out, so we don't get old replies
3527 - send/receive replies for AST messages again
3528 - if the client says that it doesn't have the lock, cancel it on the
3530 - if we timeout during I/O, don't try to cancel an in-use lock; instead
3531 mark it as destroyed, it will all work out when decref is called
3532 - fix module use counts (22, 581)
3534 - ASTs now expect a reply (server cancels lock on error reply)
3536 2002-12-02 Andreas Dilger <adilger@clusterfs.com>
3539 - fix many simultaneous client startup (392)
3540 - fix dentry->d_it clobbering
3541 - credentials weren't being shipped for readdir/getattr operations
3542 - remove invalid assertions triggered during some concurrent MD
3544 - proper Lustre versions added (336, 389)
3545 - fix memory leak for create error case (398)
3546 - fix LOV locking bug that would get cli/srv out of sync
3547 - fix echo client over LOV (409)
3548 - fix dbench 2, extN refcount problem (170, 258, 356, 418)
3549 - fix double-O_EXCL intent crash (424)
3550 - avoid sending multiple lock CANCELs (352)
3552 - MDS can do multi-client recovery (modulo bugs in new code)
3554 - many updates, edits, cleanups
3556 2002-11-18 Phil Schwan <phil@clusterfs.com>
3559 - fix null d_it dereference (346)
3560 - fix full OST/dbench hang (333)
3561 - fix permission problem with file removal (286)
3562 - fix removal of OSCs from LOV when they fail
3563 - fix NULL deref during bulk timeout (214)
3564 - fix problems related to multiple filesystems on one MDS (241)
3565 - fixed serious subtle metadata locking bugs
3566 - free locks on clients when inodes are removed due to memory
3568 - fix inode pointer in lock data (285)
3569 - partial support for multiple MDS on a single host (241)
3570 - data locks weren't cancelled at clear_inode time (290, 311)
3571 - intent locks could lead to unbounded lock growth (205)
3572 - added a maximum lock count, an LRU list, and a flusher
3573 - fix multiple rename (365)
3574 - properly abstracted the echo client
3575 - OSC locked 1 byte too many; fixed
3576 - rewrote brw callback code:
3577 - fixed recovery bugs related to LOVs (306)
3578 - fixed too-many-pages-in-one-write crash (191)
3579 - fixed (again) crash in sync_io_timeout (214)
3580 - probably fixed callback-related race (385)
3582 - Add capability to MDS protocol
3583 - LDLM cancellations and callbacks on different portals
3585 2002-10-28 Andreas Dilger <adilger@clusterfs.com>
3588 - limit client IOV size to PTL_MD_MAX_IOV (611336, 191)
3589 - defer open object destruction to close time (601981, 138)
3590 - open/close OST file handle in obdo (OBD_MD_FLHANDLE) (601981, 138)
3591 - move LDLM_ENQUEUE/CONVERT back to MDS portal (625069)
3592 - abstract ll_lookup2, fix ll_revalidate2 to use abstraction (256)
3593 - don't call obd_setattr in ll_file_release for destroyed objects
3594 * protocol change to lustre_msg: move |version| and add |flags|
3595 * protocol change to osc_punch: "start" in "o_size", "end" in "o_blocks"
3596 * lock replay: for LDLM_FL_REPLAY trust client to do right thing
3597 * added replay of create, unlink, link and rename operations during
3598 MDS failover; recovery should be much more robust now
3599 * remove failed OSCs from LOVs (only lov_create uses this so far)
3600 * the lustre-HOWTO was brought (more) up to date (582544)
3602 2002-10-23 Phil Schwan <phil@clusterfs.com>
3605 - in-use dentries weren't being reused properly (617851)
3606 - prevent multiple LDLM setup (599178)
3607 - fix LOV size calculations for truncate (617853)
3608 - fix client handling of MDS intent errors (POSIX)
3609 - fix permission bug in lovstripe.c test (624321)
3610 - fix MDS thread deadlock - move LDLM handler to DLM portal (625069)
3611 - truncate past end of file could corrupt data
3612 - proper cleanup after timeouts, crashes, etc (592524, 550815)
3613 - a race in recovery could return ETIMEDOUT to apps (623947)
3614 - building outside the source directory was fixed
3615 * the lustre-HOWTO was brought (more) up to date (582544)
3616 * major progress was made on recovery functionality
3618 2002-10-10 Phil Schwan <phil@clusterfs.com>
3621 - recovery deadlock fix
3622 - rm -rf causes LBUG fix (617817)
3623 - file open by multiple tasks fix (618962)
3624 - directory permissions bugs (602707 and 620007)
3625 - journal_stop fixed with locking (611313)
3626 - O_APPEND failures resolved (618273, perhaps 614459)
3627 - lconf PATH fix (619770)
3628 - IA64 build fix (621450)
3629 - RPC buffer sizes scale with amount of memory
3631 2002-10-01 Phil Schwan <phil@clusterfs.com>
3634 - locks would be cancelled without throwing away data pages,
3635 resulting in inconsistent data (605627)
3636 - inode attributes were not always being refreshed (605627, 612449)
3637 - lconf now continues to cleanup after lctl reports an error
3638 - MDS now enforces user permissions (602707)
3639 - lprocfs cleanup fixed, but not yet enabled (614157)
3640 - fixed infinite server hang, should a client not respond to an AST
3641 - avoid going into recovery if user calls readlink() with a buffer
3642 that's too small (613941)
3643 - AST RPCs no longer require replies (614867) -- this may be changed
3644 - don't crash server if client sends an IOV that's too big (611336)
3645 - fixed lock conversion deadlock (611892)
3646 - fixed the following of symlinks (614622)
3647 * recovery: the server can remove locks from a client that dies, other
3648 clients can make progress
3649 * more extN patch fixes
3650 * compile-time configurable ptlrpc buffer allocations
3652 - collaborative read cache document
3653 - Lustre Lite Performance CDR document-in-progress
3655 2002-09-20 Andreas Dilger <adilger@clusterfs.com>
3658 - fix typo in patch-2.4.18
3660 2002-09-20 Andreas Dilger <adilger@clusterfs.com>
3663 - clear ptlrpc request each time in handle_incoming_request()
3664 - unlink of files now destroys the object on the OST
3666 2002-09-19 Peter Braam <braam@clusterfs.com>
3668 * add hard link support
3669 * change obdfile creation method
3670 * kernel patch changed
3672 2002-09-19 Peter Braam <braam@clusterfs.com>
3675 - stack overflow bug in extN fixed
3677 2002-09-18 Andreas Dilger <adilger@clusterfs.com>
3679 * documentation updates
3680 - add man pages for config tools
3681 - update tests/README to describe testing with new config tools
3682 - finish metadata API descriptions
3683 * bug fixes and cleanups
3684 - statfs workaround for 16TB limit
3685 - LOV stripe allocation improved, can stripe on subset of OSTs
3686 - LOV file size/IO offset was wrong for files > 4GB in size
3687 - object EA data was being dropped, caused files to be unreadable
3688 - memory overflow with non-LOV OST caused memory corruption
3689 - fixed regression tests to work with new config tools, obdfilter
3690 - fixed bug when directory size became larger than 1 block
3691 - fixed bug (for single client case) when PWD was deleted
3692 - invalidate local directory pages when doing intent-based ops
3693 - avoid LDLM oops when lock callback contained bad data
3695 2002-09-09 Andreas Dilger <adilger@clusterfs.com>
3697 * documentation updates
3698 * bug fixes and cleanups
3699 - configuration tools
3702 - 64-bit compile warnings
3703 - 64-bit internal statfs data
3705 * test_brw on persistent OST devices
3707 * lprocfs (disabled)
3709 2002-09-04 Andreas Dilger <adilger@clusterfs.com>
3711 * documentation updates
3712 * bug fixes and cleanups
3713 * configuration tools
3715 2002-08-30 Peter J. Braam <braam@clusterfs.com>
3718 * many small fixes to 0_5_4
3719 * io/network handling
3720 * thinkos in MDS operations
3722 2002-08-24 Peter J. Braam <braam@clusterfs.com>
3725 * crucial basic fixes to 0.5.3
3726 * IOR, Iozone work over Elan
3729 2002-08-07 Phil Schwan <phil@clusterfs.com>
3730 * version 0_5_3, our first alpha
3731 * we use the new Portals iovs
3732 * documentation updates
3733 * bug fixes and cleanups
3734 * small changes in the DLM wire protocol
3736 2002-07-25 Peter J. Braam <braam@clusterfs.com>
3737 * version 0_5_1 with some initial stability,
3738 * locking on MD and file I/O.
3739 * documentation updates
3740 * several bug fixes since 0.5.0
3741 * small changes in wire protocol
3743 2002-07-18 Phil Schwan <phil@clusterfs.com>
3745 * delivered as Lustre Light Alpha
3746 * fixed a crash after handling invalid MDS requests
3747 * fixed directory pages for architectures with non-4k pages sizes
3749 2002-07-11 Andreas Dilger <adilger@clusterfs.com>
3750 * release version v0_4_4
3751 * Moves TCP acceptor to be on port 2432 (unused Coda port) instead
3753 * Fixes a number of interruption problems with OST operations.
3754 * Update documentation for portals header changes
3755 * Move all wire protocol structs/defines to lustre_idl.h
3756 * Fixes symlink length bug.
3757 * Add tcpdump to repository.
3759 2002-07-05 Andreas Dilger <adilger@clusterfs.com>
3760 * release version v0_4_3
3761 * Fixes statfs for inodes on extN.
3762 * Fixes bug in runtests which would delete /etc/hosts.
3763 * Use 64-bit object IDs wherever possible (not into VFS though)
3764 Remove ost_get_info, which is unused by lustre, and out of date.
3766 2002-07-03 Peter Braam <braam@clusterfs.com>
3767 * release version v0_4_2 Fixes a lookup error (type not passed)
3768 * move forward to head of Portals
3769 * move forward to latest Lustre kernel
3771 2002-06-25 Peter Braam <braam@clusterfs.com>
3772 * release version v0_4_1. Hopefully stable on single node use.
git://git.whamcloud.com / fs / lustre-release.git / blob