1 tbd Cluster File Systems, Inc. <info@clusterfs.com>
4 2.6.9-42.0.10.EL (RHEL 4)
6 2.4.21-47.0.1.EL (RHEL 3)
7 2.6.12.6 vanilla (kernel.org)
8 2.6.16.27-0.9 (SLES 10)
9 * Client support for unpatched kernels:
10 (see https://mail.clusterfs.com/wikis/lustre/PatchlessClient)
11 2.6.16 - 2.6.19 vanilla (kernel.org)
12 2.6.9-42.0.8EL (RHEL 4)
13 * Recommended e2fsprogs version: 1.39.cfs6
15 * Note that reiserfs quotas are temporarily disabled on SLES 10 in this
18 Severity : enhancement
20 Description: Add LNET router traceability for debug purposes
21 Details : If a checksum failure occurs with a router as part of the
22 IO path, the NID of the last router that forwarded the bulk data
23 is printed so it can be identified.
28 Description: OST "spontaneously" evicts client; client has imp_pingable == 0
29 Details : Due to a race condition, liblustre clients were occasionally
32 Severity : enhancement
34 Description: lfs setstripe use optional parameters instead of postional
37 Severity : enhancement
39 Description: Nanosecond timestamp support for ldiskfs
40 Details : The on-disk ldiskfs filesystem has added support for nanosecond
41 resolution timestamps. There is not yet support for this at
42 the Lustre filesystem level.
45 Frequency : during server recovery
47 Description: MDS failing to send precreate requests due to OSCC_FLAG_RECOVERING
48 Details : request with rq_no_resend flag not awake l_wait_event if they get a
52 Frequency : nfs export on patchless client
54 Description: connectathon hang when test nfs export over patchless client
55 Details : Disconnected dentry cannot be found with lookup, so we do not need
56 to unhash it or make it invalid
59 Description: ENOENT returned for valid filehandle during dbench.
60 Details: : Check if a directory has children when invalidating dentries
61 associated with an inode during lock cancellation. This fixes
62 an incorrect ENOENT sometimes seen for valid filehandles during
66 Description: fix llapi_lov_get_uuids() to allow many OSTs to be returned
67 Details: : Change llapi_lov_get_uuids() to read the UUIDs from /proc instead
68 of using an ioctl. This allows lfsck for > 160 OSTs to succeed.
71 --------------------------------------------------------------------------------
72 2007-05-03 Cluster File Systems, Inc. <info@clusterfs.com>
77 Frequency : on some architectures
79 Description: 1.6 client sometimes fails to mount from a 1.4 MDT
80 Details : Uninitialized flags sometimes cause configuration commands to
83 --------------------------------------------------------------------------------
85 2007-04-19 Cluster File Systems, Inc. <info@clusterfs.com>
87 * CONFIGURATION CHANGE. This version of Lustre WILL NOT
88 INTEROPERATE with older versions automatically. In many cases a
89 special upgrade step is needed. Please read the
90 user documentation before upgrading any part of a 1.4.x system.
91 * WARNING: Lustre configuration and startup changes are required with
92 this release. See https://mail.clusterfs.com/wikis/lustre/MountConf
94 * Support for kernels:
95 2.4.21-47.0.1.EL (RHEL 3)
97 2.6.9-42.0.10.EL (RHEL 4)
98 2.6.12.6 vanilla (kernel.org)
99 2.6.16.27-0.9 (SLES10)
100 * Client support for unpatched kernels:
101 (see https://mail.clusterfs.com/wikis/lustre/PatchlessClient)
102 2.6.16 - 2.6.19 vanilla (kernel.org)
103 2.6.9-42.0.8EL (RHEL 4)
104 * Recommended e2fsprogs version: 1.39.cfs6
105 * Note that reiserfs quotas are disabled on SLES 10 in this kernel
108 Severity : enhancement
110 Description: MountConf
111 Details : Lustre configuration is now managed via mkfs and mount
112 commands instead of lmc and lconf. New obd types (MGS, MGC)
113 are added for dynamic configuration management. See
114 https://mail.clusterfs.com/wikis/lustre/MountConf for
117 Severity : enhancement
119 Description: dynamic OST addition
120 Details : OSTs can now be added to a live filesystem
122 Severity : enhancement
124 Description: startup order invariance
125 Details : MDTs and OSTs can be started in any order. Clients only
126 require the MDT to complete startup.
128 Severity : enhancement
130 Description: parallel, asynchronous orphan cleanup
131 Details : orphan cleanup is now performed in separate threads for each
132 OST, allowing parallel non-blocking operation.
134 Severity : enhancement
136 Description: optimized stripe assignment
137 Details : stripe assignments are now made based on ost space available,
138 ost previous usage, and OSS previous usage, in order to try
139 to optimize storage space and networking resources.
141 Severity : enhancement
143 Description: Permanently set tunables
144 Details : All writable /proc/fs/lustre tunables can now be permanently
145 set on a per-server basis, at mkfs time or on a live
148 Severity : enhancement
150 Description: Lustre message v2
151 Details : Add lustre message format v2.
153 Severity : enhancement
155 Description: client OST exclusion list
156 Details : Clients can be started with a list of OSTs that should be
157 declared "inactive" for known non-responsive OSTs.
161 Description: ENOENT returned for valid filehandle during dbench.
162 Details : Check if a directory has children when invalidating dentries
163 associated with an inode during lock cancellation. This fixes
164 an incorrect ENOENT sometimes seen for valid filehandles during
168 Frequency : SFS test only (otherwise harmless)
170 Description: SPEC SFS validation failure on NFS v2 over lustre.
171 Details : Changes the blocksize for regular files to be 2x RPC size,
172 and not depend on stripe size.
174 Severity : enhancement
176 Description: fine-grained SMP locking inside DLM
177 Details : Improve DLM performance on SMP systems by removing the single
178 per-namespace lock and replace it with per-resource locks.
180 Severity : enhancement
182 Description: don't hold multiple extent locks at one time
183 Details : To avoid client eviction during large writes, locks are not
184 held on multiple stripes at one time or for very large writes.
185 Otherwise, clients can block waiting for a lock on a failed OST
186 while holding locks on other OSTs and be evicted.
188 Severity : enhancement
190 Description: Multiple MD RPCs in flight.
191 Details : Further unserialise some read-only MDT RPCs - learn about intents.
192 To avoid overly-overloading MDT, introduce a limit on number of
193 MDT RPCs in flight for a single client and add /proc controls
194 to adjust this limit.
196 Severity : enhancement
198 Description: client read/write statistics
199 Details : Add client read/write call usage stats for performance
200 analysis of user processes.
201 /proc/fs/lustre/llite/*/offset_stats shows non-sequential
202 file access. extents_stats shows chunk size distribution.
203 extents_stats_per_process show chunk size distribution per
206 Severity : enhancement
208 Description: per-client statistics on server
209 Details : Add ldlm and operations statistics for each client in
210 /proc/fs/lustre/mds|obdfilter/*/exports/
212 Severity : enhancement
214 Description: improved MDT statistics
215 Details : Add detailed MDT operations statistics in
216 /proc/fs/lustre/mds/*/stats
218 Severity : enhancement
220 Description: VFS operations stats
221 Details : Add client VFS call stats, trackable by pid, ppid, or gid
222 /proc/fs/lustre/llite/*/vfs_ops_stats
223 /proc/fs/lustre/llite/*/vfs_track_[pid|ppid|gid]
228 Description: Fix client-side osc byte counters
229 Details : The osc read/write byte counters in
230 /proc/fs/lustre/osc/*/stats are now working
233 Frequency : always as root on SLES
235 Description: Failure of copying files with lustre special EAs.
236 Details : Client side always return success for setxattr call for lustre
237 special xattr (currently only "trusted.lov").
242 Description: Refcount LNET uuids
243 Details : The global LNET uuid list grew linearly with every startup;
244 refcount repeated list entries instead of always adding to
247 Severity : enhancement
249 Description: Dynamic service threads
250 Details : Within a small range, start extra service threads
251 automatically when the request queue builds up.
254 Frequency : mixed-endian client/server environments
256 Description: mixed-endian crashes
257 Details : The new msg_v2 system had some failures in mixed-endian
260 Severity : enhancement
262 Description: Easy OST removal
263 Details : OSTs can be permanently deactivated with e.g. 'lctl
264 conf_param lustre-OST0001.osc.active=0'
266 Severity : enhancement
268 Description: MGS proc entries
269 Details : Added basic proc entries for the MGS showing what filesystems
272 Severity : enhancement
274 Description: provide MGS failover
275 Details : Added config lock reacquisition after MGS server failover.
277 Severity : enhancement
279 Description: add Linux 2.4 support
280 Details : Added support for RHEL 2.4.21 kernel for 1.6 servers and clients
284 Description: a large application tries to do I/O to the same resource and dies
286 Details : Check the req->rq_arrival time after the call to
287 ost_brw_lock_get(), but before we do anything about
288 processing it & sending the BULK transfer request. This
289 should help move old stale pending locks off the queue as
290 quickly as obd_timeout.
293 Frequency : when an incorrect nid is specified during startup
295 Description: ptlrpc connect to non-existant node causes kernel crash
296 Details : LNET can't be re-entered from an event callback, which
297 happened when we expire a message after the export has been
298 cleaned up. Instead, hand the zombie cleanup off to another
301 Severity : enhancement
303 Description: plain/inodebits lock performance improvement
304 Details : Grouping plain/inodebits in granted list by their request modes
305 and bits policy, thus improving the performance of search through
309 Frequency : only if OST filesystem is corrupted
311 Description: client incorrectly hits assertion in ptlrpc_replay_req()
312 Details : for a short time RPCs with bulk IO are in the replay list,
313 but replay of bulk IOs is unimplemented. If the OST filesystem
314 is corrupted due to disk cache incoherency and then replay is
315 started it is possible to trip an assertion. Avoid putting
316 committed RPCs into the replay list at all to avoid this issue.
319 Frequency : liblustre (e.g. catamount) on a large cluster with >= 8 OSTs/OSS
321 Description: System hang on startup
322 Details : This bug allowed the liblustre (e.g. catamount) client to
323 return to the app before handling all startup RPCs. This
324 could leave the node unresponsive to lustre network traffic
325 and manifested as a server ptllnd timeout.
327 Severity : enhancement
329 Description: Add "/proc/sys/lustre/debug_peer_on_timeout"
330 Details : liblustre envirable: LIBLUSTRE_DEBUG_PEER_ON_TIMEOUT
331 boolean to control whether to print peer debug info when a
332 client's RPC times out.
335 Frequency : only for kernels with patches from Lustre below 1.4.3
337 Description: Remove old rdonly API
338 Details : Remove old rdonly API which unused from at least lustre 1.4.3
341 Frequency : only for devices with external journals
343 Description: Set external device read-only also
344 Details : During a commanded failover stop, we set the disk device
345 read-only while the server shuts down. We now also set any
346 external journal device read-only at the same time.
349 Frequency : when upgrading from 1.4 while trying to change parameters
351 Description: The wrong (new) MDC name was used when setting parameters for
352 upgraded MDT's. Also allows changing of OSC (and MDC)
353 parameters if --writeconf is specified at tunefs upgrade time.
356 Frequency : when setting specific ost indicies
358 Description: QOS code breaks on skipped indicies
359 Details : Add checks for missing OST indicies in the QOS code, so OSTs
360 created with --index need not be sequential.
362 Severity : enhancement
364 Description: Add uninit_groups feature to ldiskfs2 to speed up e2fsck
365 Details : The uninit_groups feature works in conjunction with the kernel
366 filesystem code (ldiskfs2 only) and e2fsprogs-1.39-cfs6 to speed
367 up the pass1 processing of e2fsck. This is a read-only feature
368 in ldiskfs2 only, so older kernels and current ldiskfs cannot
369 mount filesystems that have had this feature enabled.
371 Severity : enhancement
373 Description: Improve multi-block allocation algorithm to avoid fragmentation
374 Details : The mballoc3 code (ldiskfs2 only) adds new mechanisms to improve
375 allocation locality and avoid filesystem fragmentation.
377 ------------------------------------------------------------------------------
379 2007-04-01 Cluster File Systems, Inc. <info@clusterfs.com>
381 * Support for kernels:
382 2.4.21-47.0.1.EL (RHEL 3)
384 2.6.9-42.0.10.EL (RHEL 4)
385 2.6.12.6 vanilla (kernel.org)
386 2.6.16.27-0.9 (SLES 10)
387 * Recommended e2fsprogs version: 1.39.cfs5
389 * Note that reiserfs quotas are disabled on SLES 10 in this kernel
393 Frequency : liblustre (e.g. catamount) on a large cluster with >= 8 OSTs/OSS
395 Description: System hang on startup
396 Details : This bug allowed the liblustre (e.g. catamount) client to
397 return to the app before handling all startup RPCs. This
398 could leave the node unresponsive to lustre network traffic
399 and manifested as a server ptllnd timeout.
401 Severity : enhancement
403 Description: Add "/proc/sys/lustre/debug_peer_on_timeout"
404 (liblustre envirable: LIBLUSTRE_DEBUG_PEER_ON_TIMEOUT)
405 boolean to control whether to print peer debug info when a
406 client's RPC times out.
411 Description: make O_SYNC working on 2.6 kernels
412 Details : 2.6 kernels use different method for mark pages for write,
413 so need add a code to lustre for O_SYNC work.
418 Description: Failure to close file and release space on NFS
419 Details : Put inode details into lock acquired in ll_intent_file_open.
420 Use mdc_intent_lock in ll_intent_open to properly
421 detect all kind of errors unhandled by mdc_enqueue.
426 Description: proc file read during shutdown sometimes raced obd removal,
428 Details : Add lock to prevent obd access after proc file removal.
431 Frequency : Only for files larger than 4GB on 32-bit clients.
433 Description: improperly doing page alignment of locks
434 Details : Modify lustre core code to use CFS_PAGE_* defines instead of
435 PAGE_*. Make CFS_PAGE_MASK a 64-bit mask.
440 Description: RPCs being resent when they shouldn't be
441 Details : Some RPCs that should not be resent are being resent. This
442 can cause inconsistencies in the RPC state machine. Do not
443 resend such requests.
446 Frequency : rare, only with NFS export
448 Description: Crash on NFS re-export node
449 Details : under very unusual load conditions an assertion is hit in
450 ll_intent_file_open()
453 Frequency : only if OST filesystem is corrupted
455 Description: client incorrectly hits assertion in ptlrpc_replay_req()
456 Details : for a short time RPCs with bulk IO are in the replay list,
457 but replay of bulk IOs is unimplemented. If the OST filesystem
458 is corrupted due to disk cache incoherency and then replay is
459 started it is possible to trip an assertion. Avoid putting
460 committed RPCs into the replay list at all to avoid this issue.
465 Description: large O_DIRECT requests fail under memory pressure/fragmentation
466 Details : Large single O_DIRECT read and write calls can fail to allocate
467 a sufficiently large buffer to process the request. In case of
468 allocation failure the allocation is retried with a smaller
469 buffer and broken into smaller requests.
471 Severity : enhancement
473 Description: Add -o localflock option to simulate old noflock behaviour.
474 Details : This will achieve local-only flock/fcntl locks coherentness.
479 Description: versioning check is incomplete
480 Details : Checking the version difference of client vs. server, report
481 error if the gap is too big.
486 Description: add support PG_writeback bit
487 Details : add support for PG_writeback bit for Lustre, for more carefull
488 work with page cache in 2.6 kernel. This also fix some deadlocks
489 and remove hack for work O_SYNC with 2.6 kernel.
491 Severity : enhancement
493 Description: Add uninit_groups feature to ldiskfs2 to speed up e2fsck
494 Details : The uninit_groups feature works in conjunction with the kernel
495 filesystem code (ldiskfs2 only) and e2fsprogs-1.39-cfs6 to speed
496 up the pass1 processing of e2fsck. This is a read-only feature
497 in ldiskfs2 only, so older kernels and current ldiskfs cannot
498 mount filesystems that have had this feature enabled.
500 Severity : enhancement
502 Description: Improve multi-block allocation algorithm to avoid fragmentation
503 Details : The mballoc3 code (ldiskfs2 only) adds new mechanisms to improve
504 allocation locality and avoid filesystem fragmentation.
506 ------------------------------------------------------------------------------
508 2007-02-09 Cluster File Systems, Inc. <info@clusterfs.com>
510 * Support for kernels:
511 2.6.9-42.0.3EL (RHEL 4)
513 2.4.21-47.0.1.EL (RHEL 3)
514 2.6.12.6 vanilla (kernel.org)
515 * Recommended e2fsprogs version: 1.39.cfs2-0
517 * The backwards-compatible /proc/sys/portals symlink has been removed
518 in this release. Before upgrading, please ensure that you change
519 any configuration scripts or /etc/sysctl.conf files that access
520 /proc/sys/portals/* or sysctl portals.* to use the corresponding
521 entry in /proc/sys/lnet or sysctl lnet.*. This change can be made
522 in advance of the upgrade on any system running Lustre 1.4.6 or
523 newer, since /proc/sys/lnet was added in that version.
524 * Note that reiserfs quotas are disabled on SLES 10 in this kernel
528 Frequency : only when quota is used
530 Description: avoid scanning export list for quota master
531 Details : Change the algorithms to avoid scanning export list in order
532 to improve the efficiency.
535 Frequency : MDS failover only, very rarely
537 Description: "went back in time" messages on mds failover
538 Details : The greatest transno may be lost when the current operation
539 finishes with an error (transno==0) and the client's last_rcvd
540 record is over-written. Save the greatest transno in the
541 mds_last_transno for this case.
544 Frequency : always for specific kernels and striping counts
546 Description: client may get "Matching packet too big" without ACL support
547 Details : Clients compiled without CONFIG_FS_POSIX_ACL get an error message
548 when trying to access files in certain configurations. The
549 clients should in fact be denied when mounting because they do
553 Frequency : Cray XT3 with more than 4000 clients and multiple jobs
555 Description: many clients connecting with IO in progress causes connect timeouts
556 Details : Avoid synchronous journal commits to avoid delays caused by many
557 clients connecting/disconnecting when bulk IO is in progress.
558 Queue liblustre connect requests on OST_REQUEST_PORTAL instead of
559 OST_IO_PORTAL to avoid delays behind potentially many pending
563 Frequency : occasionally with multiple writers to a single file
565 Description: shared writes to file may result in wrong size reported by stat()
566 Details : Allow growing of kms when extent lock is cancelled
569 Frequency : always with random mmap IO to multi-striped file
571 Description: mmap write might be lost if we are writing to a 'hole' in stripe
572 Details : Only if the hole is at the end of OST object so that kms is too
573 small. Fix is to increase kms accordingly in ll_nopage.
576 Frequency : rare, only if OST filesystem is inconsistent with MDS filesystem
578 Description: writes to a missing object would leak memory on the OST
579 Details : If there is an inconsistency between the MDS and OST filesystems,
580 such that the MDS references an object that doesn't exist, writes
581 to that object will leak memory due to incorrect cleanup in the
582 error handling path, eventually running out of memory on the OST.
587 Description: Creating too long symlink causes lustre errors
588 Details : Check symlink and name lengths before sending requests to MDS.
591 Frequency : only if flock is enabled (not on by default)
593 Description: posix locks not released on fd closure on 2.6.9+
594 Details : We failed to add posix locks to list of inode locks on 2.6.9+
595 kernels, this caused such locks not to be released on fd close and
596 then assertions on fs unmount about still used locks.
599 Frequency : MDS failover only, very rarely
601 Description: clients may get ASSERTION(granted_lock != NULL)
602 Details : When request was taking a long time, and a client was resending
603 a getattr by name lock request. The were multiple lock requests
604 with the same client lock handle and
605 mds_getattr_name->fixup_handle_for_resent_request found one of the
606 lock handles but later failed with ASSERTION(granted_lock != NULL).
611 Description: handle->h_buffer_credits > 0, assertion failure
612 Details : h_buffer_credits is zero after truncate, causing assertion
613 failure. This patch extends the transaction or creates a new
617 Frequency : NFS re-export or patchless client
618 Bugzilla : 11179, 10796
619 Description: Crash on NFS re-export node (__d_move)
620 Details : We do not want to hash the dentry if we don't have a lock.
621 But if this dentry is later used in d_move, we'd hit uninitialised
622 list head d_hash, so we just do this to init d_hash field but
623 leave dentry unhashed.
626 Frequency : NFS re-export or patchless client
628 Description: NFS exports has problem with symbolic link
629 Details : lustre client didn't properly install dentry when re-exported
630 to NFS or running patchless client.
633 Frequency : NFS re-export or patchless client
635 Description: Various nfs/patchless fixes.
636 Details : fixes reuse disconected alias for lookup process - this fixes
637 warning "find_exported_dentry: npd != pd",
638 fix permission error with open files at nfs.
639 fix apply umask when do revalidate.
642 Frequency : occasional
644 Description: Crash on NFS re-export node
645 Details : calling clear_page() on the wrong pointer triggered oops in
646 generic_mapping_read().
649 Frequency : rarely, using O_DIRECT IO
651 Description: unaligned directio crashes client with LASSERT
652 Details : check for unaligned buffers before trying any requests.
655 Frequency : rarely, using CFS RAID5 patches in non-standard kernel series
657 Description: stale data returned from RAID cache
658 Details : If only a small amount of IO is done to the RAID device before
659 reading it again it is possible to get stale data from the RAID
660 cache instead of reading it from disk.
663 Frequency : always for sles10 kernel
665 Description: sles10 support
666 Details : ll_follow_link: compile fixes and using of nd_set_link
670 Frequency : depends on arch, kernel and compiler version, always on sles10
673 Description: recursive or deep enough symlinks cause stack overflow
674 Details : getting rid of large stack-allocated variable in
678 Frequency : depends on hardware
680 Description: lustre write performance loss in the SLES10 kernel
681 Details : the performance loss is caused by using of write barriers in the
682 ext3 code. The SLES10 kernel turns barrier support on by
683 default. The fix is to undo that change for ldiskfs.
686 ------------------------------------------------------------------------------
688 2006-12-09 Cluster File Systems, Inc. <info@clusterfs.com>
690 * Support for kernels:
691 2.6.9-42.0.3EL (RHEL 4)
693 2.4.21-47.0.1.EL (RHEL 3)
694 2.6.12.6 vanilla (kernel.org)
698 Frequency : quota enabled and large files being deleted
700 Description: releasing more than 4GB of quota at once hangs OST
701 Details : If a user deletes more than 4GB of files on a single OST it
702 will cause the OST to spin in an infinite loop. Release
703 quota in < 4GB chunks, or use a 64-bit value for 1.4.7.1+.
708 Description: statfs data retrieved from /proc may be stale or zero
709 Details : When reading per-device statfs data from /proc, in the
710 {kbytes,files}_{total,free,avail} files, it may appear
711 as zero or be out of date.
714 Frequency : systems with MD RAID1 external journal devices
716 Description: lconf's call to blkid is confused by RAID1 journal devices
717 Details : Use the "blkid -l" flag to locate the MD RAID device instead
718 of returning all block devices that match the journal UUID.
721 Frequency : always, for aggregate stripe size over 4GB
723 Description: "lfs setstripe" fails assertion when setting 4GB+ stripe width
724 Details : Using "lfs setstripe" to set stripe size * stripe count over 4GB
725 will fail the kernel with "ASSERTION(lsm->lsm_xfersize != 0)"
728 Frequency : always if "lfs find" used on a local file/directory
730 Description: "lfs find" segfaults if used on a local file/directory
731 Details : The case where a directory component was not specified wasn't
732 handled correctly. Handle this properly.
735 Frequency : always on ppc64
737 Description: the write to an ext3 filesystem mounted with mballoc got stuck
738 Details : ext3_mb_generate_buddy() uses find_next_bit() which does not
739 perform endianness conversion.
742 Frequency : rarely (truncate to non-zero file size after write under load)
743 Bugzilla : 10730, 10687
744 Description: Files padded with zeros to next 4K multiple
745 Details : With filesystems mounted using the "extents" option (2.6 kernels)
746 it is possible that files that are truncated to a non-zero size
747 immediately after being written are filled with zero bytes beyond
748 the truncated size. No file data is lost.
750 Severity : enhancement
752 Description: Allow recovery/failover for liblustre clients.
753 Details : liblustre clients were unaware of failover configurations until
756 Severity : enhancement
758 Description: user file locks should fail when not mounting with flock option
759 Details : Set up an error-returning stub in ll_file_operations.lock field
760 to prevent incorrect behaviour when client is mounted without
761 flock option. Also, set up properly f_op->flock field for
765 Frequency : always on ia64
767 Description: "lfs df" loops on printing out MDS statfs information
768 Details : The obd_ioctl_data was not initialized and in some systems
769 this caused a failure during the ioctl that did not return
770 an error. Initialize the struct and return an error on failure.
773 Frequency : SLES 9 only
775 Description: Error of copying files with lustre special EAs as root
776 Details : Client side always return success for setxattr call for lustre
777 special xattr (currently only "trusted.lov").
780 Frequency : rarely on clusters with both ia64+i386 clients
782 Description: ia64+i686 clients doing shared IO on the same file may LBUG
783 Details : In rare cases when both ia64+i686 (or other mixed-PAGE_SIZE)
784 clients are doing concurrent writes to the same file it is
785 possible that the ia64 clients may LASSERT because the OST
786 extent locks are not PAGE_SIZE aligned. Ensure that grown
787 locks are always aligned on the request boundary.
790 Frequency : specific use, occasional
792 Description: Overwriting in use executable truncates on-disk binary image
793 Details : If one node attempts to overwrite an executable in use by
794 another node, we now correctly return ETXTBSY instead of
797 Severity : enhancement
799 Description: Async OSC create to avoid the blocking unnecessarily.
800 Details : If a OST has no remain object, system will block on the creating
801 when need to create a new object on this OST. Now, ways use
802 pre-created objects when available, instead of blocking on an
803 empty osc while others are not empty. If we must block, we block
804 for the shortest possible period of time.
809 Description: chmod on Lustre root is propagated to other clients
810 Details : Re-validate root's dentry in ll_lookup_it to avoid having it
811 invalid by the follow_mount time.
814 Frequency : liblustre clients only
816 Description: Race in 'instant cancel' lock handling could lead to such locks
817 never to be granted in case of SMP MDS
818 Details : Do not destroy not yet granted but cbpending locks in
822 Frequency : replay/resend of open
824 Description: non null lock assetion failure in mds_intent_policy
825 Details : Trying to replay/resend lockless open requests resulted in
826 mds_open() returning 0 with no lock. Now it sets a flag if
827 a lock is going to be returned.
829 Severity : enhancement
831 Description: Checksum enhancements
832 Details : New checksum enhancements allow for resending RPCs that failed
835 Severity : enhancement
837 Description: Tunables on number of dirty pages in cacche
838 Details : Allow to set limit on number of dirty pages cached.
843 Description: client crash on unmount - lock still has references
844 Details : In some error handling cases it was possible to leak a lock
845 reference on a client while accessing a file. This was not
846 harmful to the client during operation, but would cause the
847 client to crash when the filesystem is unmounted.
850 Frequency : specific case, rare
852 Description: ETXTBSY on mds though file not in use by client
853 Details : ETXTBSY is no longer incorrectly returned when attempting to
854 chmod or chown a directory that the user previously tried to
855 execute or a currently-executing binary.
858 Frequency : extremely rare except on liblustre-based clients
860 Description: Lustre space not freed when files are deleted
861 Details : Clean up open-unlinked files after client eviction. Previously
862 the unlink was skipped and the files remained as orphans.
867 Description: OST failure "would be an LBUG" in waiting_locks_callback()
868 Details : In some cases it was possible to send a blocking callback to
869 a client doing a glimpse, even though that client didn't get
870 a lock granted. When the glimpse lock is cancelled on the OST
871 the freed lock is left on the waiting list and corrupted the list.
874 Frequency : all core dumps
876 Description: Broke core dumps to lustre
877 Details : Negative dentry may be unhashed if parent does not have UPDATE
878 lock, but some callers, e.g. do_coredump, expect dentry to be
879 hashed after successful create, hash it in ll_create_it.
881 ------------------------------------------------------------------------------
883 2006-09-13 Cluster File Systems, Inc. <info@clusterfs.com>
885 * Support for kernels:
886 2.6.9-42.0.2.EL (RHEL 4)
888 2.4.21-40.EL (RHEL 3)
889 2.6.12.6 vanilla (kernel.org)
893 Frequency : always on RHEL 3
895 Description: Number of open files grows over time
896 Details : The number of open files grows over time, whether or not
897 Lustre is started. This was due to a filp leak introduced
898 by one of our kernel patches.
900 ------------------------------------------------------------------------------
902 2006-08-20 Cluster File Systems, Inc. <info@clusterfs.com>
904 * Support for kernels:
907 2.4.21-40.EL (RHEL 3)
908 2.6.12.6 vanilla (kernel.org)
913 Bugzilla : 5719, 9635, 9792, 9684
914 Description: OST (or MDS) trips assertions in (re)connection under heavy load
915 Details : If a server is under heavy load and cannot reply to new
916 connection requests before the client resends the (re)connect,
917 the connection handling code can behave badly if two service
918 threads are concurrently handing separate (re)connections from
919 the same client. Add better locking to the connection handling
920 code, and ensure that only a single connection will be processed
921 for a given client UUID, even if the lock is dropped.
923 Severity : enhancement
925 Description: add TCP zero-copy support to kernel
926 Details : Add support to the kernel TCP stack to allow zero-copy bulk
927 sends if the hardware supports scatter-gather and checksumming.
928 This allows socklnd to do client-write and server-read more
929 efficiently and reduce CPU utilization from skbuf copying.
932 Frequency : only if NFS exporting from client
934 Description: NULL pointer deref in ll_iocontrol() if chattr mknod file
935 Details : If setting attributes on a file created under NFS that had
936 never been opened it would be possible to oops the client
937 if the file had no objects.
941 Bugzilla : 9326, 10402, 10897
942 Description: client crash in ptlrpcd_wake() thread when sending async RPC
943 Details : It is possible that ptlrpcd_wake() dereferences a freed async
944 RPC. In rare cases the ptlrpcd thread alread processed the RPC
945 before ptlrpcd_wake() was called and the request was freed.
948 Frequency : always for liblustre
950 Description: liblustre client does MDS+OSTs setattr RPC for each write
951 Details : When doing a write from a liblustre client, the client
952 incorrectly issued an RPC to the MDS and each OST the file was
953 striped over in order to update the timestamps. When writing
954 with small chunks and many clients this could overwhelm the MDS
955 with RPCs. In all cases it would slow down the write because
956 these RPCs are unnecessary.
958 Severity : enhancement
960 Description: allow number of MDS service threads to be changed at module load
961 Details : It is now possible to change the number of MDS service threads
962 running. Adding "options mds mds_num_threads={N}" to the MDS's
963 /etc/modprobe.conf will set the number of threads for the next
964 time Lustre is restarted (assuming the "mds" module is also
965 reloaded at that time). The default number of threads will
966 stay the same, 32 for most systems.
971 Description: OST crash if filesystem is unformatted or corrupt
972 Details : If an OST is started on a device that has never been formatted
973 or if the filesystem is corrupt and cannot even mount then the
974 error handling cleanup routines would dereference a NULL pointer.
979 Description: NULL pointer deref in llap_from_page.
980 Details : get_cache_page_nowait can return a page with NULL (or otherwise
981 incorrect) mapping if the page was truncated/reclaimed while it was
982 searched for. Check for this condition and skip such pages when
983 doing readahead. Introduce extra check to llap_from_page() to
984 verify page->mapping->host is non-NULL (so page is not anonymous).
987 Frequency : Sometimes when using sys_sendfile
989 Description: "page not covered by a lock" warnings from ll_readpage
990 Details : sendfile called ll_readpage without right page locks present.
991 Now we introduced ll_file_sendfile that does necessary locking
992 around call to generic_file_sendfile() much like we do in
996 Frequency : with certain MDS communication failures at client mount time
998 Description: NULL pointer deref after failed client mount
999 Details : a client connection request may delayed by the network layer
1000 and not be sent until after the PTLRPC layer has timed out the
1001 request. If the client fails the mount immediately it will try
1002 to clean up before the network times out the request. Add a
1003 reference from the request import to the obd device and delay
1004 the cleanup until the network drops the request.
1007 Frequency : occasionally during client (re)connect
1009 Description: assertion failure during client (re)connect
1010 Details : processing a client connection request may be delayed by the
1011 client or server longer than the client connect timeout. This
1012 causes the client to resend the connection request. If the
1013 original connection request is replied in this interval, the
1014 client may trip an assertion failure in ptlrpc_connect_interpret()
1015 which thought it would be the only running connect process.
1018 Frequency : only with obd_echo servers and clients that are rebooted
1020 Description: kernel BUG accessing uninitialized data structure
1021 Details : When running an obd_echo server it did not start the ping_evictor
1022 thread, and when a client was evicted an uninitialized data
1023 structure was accessed. Start the ping_evictor in the RPC
1024 service startup instead of the OBD startup.
1026 Severity : enhancement
1027 Bugzilla : 10193 (patchless)
1028 Description: Remove dependency on various unexported kernel interfaces.
1029 Details : No longer need reparent_to_init, exit_mm, exit_files,
1030 sock_getsockopt, filemap_populate, FMODE_EXEC, put_filp.
1033 Frequency : rare (only users of deprecated and unsupported LDAP config)
1035 Description: write_conf for zeroconf mount queried LDAP incorrectly for client
1036 Details : LDAP apparently contains 'lustreName' attributes instead of
1037 'name'. A simple remapping of the name is sufficient.
1040 Frequency : rare (only with non-default dump_on_timeout debug enabled)
1042 Description: waiting_locks_callback trips kernel BUG if client is evicted
1043 Details : Running with the dump_on_timeout debug flag turned on makes
1044 it possible that the waiting_locks_callback() can try to dump
1045 the Lustre kernel debug logs from an interrupt handler. Defer
1046 this log dumping to the expired_lock_main() thread.
1048 Severity : enhancement
1050 Description: Support NFS exporting on 2.6 kernels.
1051 Details : Implement non-rawops metadata methods for NFS server to use without
1052 changing NFS server code.
1055 Frequency : very rare (synthetic metadata workload only)
1057 Description: two racing renames might cause an MDS thread to deadlock
1058 Details : Running the "racer" program may cause one MDS thread to rename
1059 a file from being the source of a rename to being the target of
1060 a rename at exactly the same time that another thread is doing
1061 so, and the second thread has already enqueued these locks after
1062 doing a lookup of the target and is trying to relock them in
1063 order. Ensure that we don't try to re-lock the same resource.
1066 Frequency : only very large systems with liblustre clients
1068 Description: slow eviction of liblustre clients with the "evict_by_nid" RPC
1069 Details : Use asynchronous set_info RPCs to send the "evict_by_nid" to
1070 all OSTs in parallel. This allows the eviction of stale liblustre
1071 clients to proceed much faster than if they were done in series,
1072 and also offers similar improvements for other set_info RPCs.
1077 Description: excessive CPU usage during initial read phase on client
1078 Details : During the initial read phase on a client, it would agressively
1079 retry readahead on the file, consuming too much CPU and impacting
1080 performance (since 1.4.5.8). Improve the readahead algorithm
1081 to avoid this, and also improve some other common cases (read
1082 of small files in particular, where "small" is files smaller than
1083 /proc/fs/lustre/llite/*/max_read_ahead_whole_mb, 2MB by default).
1088 Description: MDS crash when receiving packet with unknown intent.
1089 Details : Do not LBUG in unknown intent case, just return -EFAULT
1091 Severity : enhancement
1092 Bugzilla : 9293, 9385
1093 Description: MDS RPCs are serialised on client. This is unnecessary for some.
1094 Details : Do not serialize getattr (non-intent version) and statfs.
1097 Frequency : occasional, when OST network is overloaded/intermittent
1099 Description: client evicted by OST after bulk IO timeout
1100 Details : If a client sends a bulk IO request (read or write) the OST
1101 may evict the client if it is unresposive to its data GET/PUT
1102 request. This is incorrect if the network is overloaded (takes
1103 too long to transfer the RPC data) or dropped the OST GET/PUT
1104 request. There is no need to evict the client at all, since
1105 the pinger and/or lock callbacks will handle this, and the
1106 client can restart the bulk request.
1109 Frequency : Always when mmapping file with no objects
1111 Description: client crashes when mmapping file with no objects
1112 Details : Check that we actually have objects in a file before doing any
1113 operations on objects in ll_vm_open, ll_vm_close and
1119 Description: Request leak when working with deleted CWD
1120 Details : Introduce advanced request refcount tracking for requests
1121 referenced from lustre intent.
1123 Severity : Enhancement
1125 Description: Cache open file handles on client.
1126 Details : MDS now will return special lock along with openhandle, if
1127 requested and client is allowed to hold openhandle, even if unused,
1128 until such a lock is revoked. Helps NFS a lot, since NFS is opening
1129 closing files for every read/write openration.
1131 Severity : Enhancement
1133 Description: Cache open negative dentries on client when possible.
1134 Details : Guard negative dentries with UPDATE lock on parent dir, drop
1135 negative dentries on lock revocation.
1140 Description: Remounting a client read-only wasn't possible with a zconf mount
1141 Details : It wasn't possible to remount a client read-only with llmount.
1143 Severity : enhancement
1144 Description: Include MPICH 1.2.6 Lustre ADIO interface patch
1145 Details : In lustre/contrib/ or /usr/share/lustre in RPM a patch for
1146 MPICH is included to add Lustre-specific ADIO interfaces.
1147 This is based closely on the UFS ADIO layer and only differs
1148 in file creation, in order to allow the OST striping to be set.
1149 This is user-contributed code and not supported by CFS.
1154 Description: extended inode attributes (immutable, append-only) work improperly
1155 when 2.4 and 2.6 kernels are used on client/server or vice versa
1156 Details : Introduce kernel-independent values for these flags.
1158 Severity : enhancement
1161 Description: Allow fractional MB tunings for lustre in /proc/ filesystem.
1162 Details : Many of the /proc/ tunables can only be tuned at a megabyte
1163 granularity. Now, Fractional MB granularity is be supported,
1164 this is very useful for low memory system.
1166 Severity : enhancement
1168 Description: Getattr by fid
1169 Details : Getting a file attributes by its fid, obtaining UPDATE|LOOKUP
1170 locks, avoids extra getattr rpc requests to MDS, allows '/' to
1171 have locks and avoids getattr rpc requests for it on every stat.
1174 Frequency : Always, for filesystems larger than 2TB
1176 Description: ldiskfs crash at mount for filesystem larger than 2TB with mballoc
1177 Details : Kenrel kmalloc limits allocations to 128kB and this prevents
1178 filesystems larger than 2TB to be mounted with mballoc enabled.
1181 Frequency : Always, for 32-bit kernel without CONFIG_LBD and filesystem > 2TB
1183 Description: filesystem corruption for non-standard kernels and very large OSTs
1184 Details : If a 32-bit kernel is compiled without CONFIG_LBD enabled and a
1185 filesystems larger than 2TB is mounted then the kernel will
1186 silently corrupt the start of the filesystem. CONFIG_LBD is
1187 enabled for all CFS-supported kernels, but the possibility of
1188 this happening with a modified kernel config exists.
1190 Severity : enhancement
1192 Description: add client O_DIRECT support for 2.6 kernels
1193 Details : It is now possible to do O_DIRECT reads and writes to files
1194 in the Lustre client mountpoint on 2.6 kernel clients.
1196 Severity : enhancement
1198 Description: parallel glimpse, setattr, statfs, punch, destroy requests
1199 Details : Sends glimpse, setattr, statfs, punch, destroy requests to OSTs in
1200 parallel, not waiting for response from every OST before sending
1201 a rpc to the next OST.
1206 Description: setattr vs write race when updating file timestamps
1207 Details : Client processes that update a file timestamp into the past
1208 right after writing to the file (e.g. tar) it is possible that
1209 the updated file modification time can be reset to the current
1210 time due to a race between processing the setattr and write RPC.
1212 Severity : enhancement
1214 Description: Bring 'lfs find' closer in line with regular Linux find.
1215 Details : lfs find util supports -atime, -mtime, -ctime, -maxdepth, -print,
1216 -print0 options and obtains all the needed info through the lustre
1219 Severity : enhancement
1221 Description: support up to 1024 configured devices on one node
1222 Details : change obd_dev array from statically allocated to dynamically
1223 allocated structs as they are first used to reduce memory usage
1228 Description: Flush dirty partially truncated pages during truncate
1229 Details : Immediatelly flush partially truncated pages in filter_setattr,
1230 this way we completely avoid having any pages in page cache on OST
1231 and can retire ugly workarounds during writes to flush such pages.
1236 Description: i_sem vs transaction deadlock in mds_obd_destroy during unlink.
1237 Details : protect inode from truncation within vfs_unlink() context
1238 just take a reference before calling vfs_unlink() and release it
1239 when parent's i_sem is free.
1242 Frequency : always, if extents are used on OSTs
1244 Description: index ei_leaf_hi (48-bit extension) is not zeroed in extent index
1245 Details : OSTs using the extents format would not zero the high 16 bits of
1246 the index physical block number. This is not a problem for any
1247 OST filesystems smaller than 16TB, and no kernels support ext3
1248 filesystems larger than 16TB yet. This is fixed in 1.4.7 (all
1249 new/modified files) and can be fixed for existing filesystems
1250 with e2fsprogs-1.39-cfs1.
1255 Description: import connection selection may be incorrect if timer wraps
1256 Details : Using a 32-bit jiffies timer with HZ=1000 may cause backup
1257 import connections to be ignored if the 32-bit jiffies counter
1258 wraps. Use a 64-bit jiffies counter.
1261 Frequency : during server recovery
1263 Description: crash after server is denying duplicate export
1264 Details : If clients are resending connect requests to the server, the
1265 server refuses to allow a client to connect multiple times.
1266 Fixed a bug in the handling of this case.
1269 Frequency : very large clusters immediately after boot
1271 Description: LNET request buffers exhausted under heavy short-term load
1272 Details : If a large number of client requests are generated on a service
1273 that has previously never seen so many requests it is possible
1274 that the request buffer growth cannot keep up with the spike in
1275 demand. Instead of dropping incoming requests, they are held in
1276 the LND until the RPC service can accept more requests.
1279 Frequency : Sometimes during replay
1281 Description: Assertion failure in ll_local_open after replay.
1282 Details : If replay happened on an open request reply before we were able
1283 to set replay handler, reply will become not swabbed tripping the
1284 assertion in ll_local_open. Now we set the handler right after
1285 recognising of open request
1288 Frequency : very rare
1290 Description: kernel reports "badness in vsnprintf"
1291 Details : Reading from the "recovery_status" /proc file in small chunks
1292 may cause a negative length in lprocfs_obd_rd_recovery_status()
1293 call to vsnprintf() (which is otherwise harmless). Exit early
1294 if there is no more space in the output buffer.
1296 Severity : enhancement
1298 Description: clear OBD RPC statistics by writing to them
1299 Details : It is now possible to clear the OBD RPC statistics by writing
1300 to the "stats" file.
1305 Description: Client mtime is not the same on different clients after utimes
1306 Details : In some cases, the client was using the utimes() syscall on
1307 a file cached on another node. The clients now validate the
1308 ctime from the MDS + OSTs to determine which one is right.
1313 Description: Inability to activate failout mode
1314 Details : lconf script incorrectly assumed that in python string's numeric
1315 value is used in comparisons.
1318 Frequency : always with multiple stripes per file
1320 Description: Inefficient object allocation for mutli-stripe files
1321 Details : When selecting which OSTs to stripe files over, for files with
1322 a stripe count that divides evenly into the number of OSTs,
1323 the MDS is always picking the same starting OST for each file.
1324 Return the OST selection heuristic to the original design.
1329 Description: mount failures may take full timeout to return an error
1330 Details : Under some heavy load conditions it is possible that a
1331 failed mount can wait for the full obd_timeout interval,
1332 possibly several minutes, before reporting an error.
1333 Instead return an error as soon as the status is known.
1335 ------------------------------------------------------------------------------
1337 2006-02-14 Cluster File Systems, Inc. <info@clusterfs.com>
1339 * WIRE PROTOCOL CHANGE. This version of Lustre networking WILL NOT
1340 INTEROPERATE with older versions automatically. Please read the
1341 user documentation before upgrading any part of a live system.
1342 * WARNING: Lustre networking configuration changes are required with
1343 this release. See https://bugzilla.clusterfs.com/show_bug.cgi?id=10052
1346 * Support for kernels:
1347 2.6.9-22.0.2.EL (RHEL 4)
1348 2.6.5-7.244 (SLES 9)
1349 2.6.12.6 vanilla (kernel.org)
1352 Severity : enhancement
1353 Bugzilla : 7981/8208
1354 Description: Introduced Lustre Networking (LNET)
1355 Details : LNET is new networking infrastructure for Lustre, it includes
1356 a reorganized network configuration mode (see the user
1357 documentation for full details) as well as support for routing
1358 between different network fabrics. Lustre Networking Devices
1359 (LNDs) for the supported network fabrics have also been
1360 created for this new infrastructure.
1362 Severity : enhancement
1363 Description: Introduced Access control lists
1364 Details : clients can set ACLs on files and directories in order to have
1365 more fine-grained permissions than the standard Unix UGO+RWX.
1366 The MDS must be started with the "-o acl" mount option.
1368 Severity : enhancement
1369 Description: Introduced filesystem quotas
1370 Details : Administrators may now establish per-user quotas on the
1373 Severity : enhancement
1375 Description: Configuration change for the XT3
1376 The PTLLND is now used to run Lustre over Portals on the XT3
1377 The configure option(s) --with-cray-portals are no longer used.
1378 Rather --with-portals=<path-to-portals-includes> is used to
1379 enable building on the XT3. In addition to enable XT3 specific
1380 features the option --enable-cray-xt3 must be used.
1385 Description: Running on many-way SMP OSTs can trigger oops in llcd_send()
1386 Details : A race between allocating a new llcd and re-getting the llcd_lock
1387 allowed another thread to grab newly-allocated llcd.
1389 Severity : enhancement
1391 Description: 2.6 OST async journal commit and locking fix to improve performance
1392 Details : The filter_direct_io()+filter_commitrw_write() journal commits for
1393 2.6 kernels are now async as they already were in 2.4 kernels so
1394 that they can commit concurrently with the network bulk transfer.
1395 For block-allocated files the filter allocation semaphore is held
1396 to avoid filesystem fragmentation during allocation. BKL lock
1397 removed for 2.6 xattr operations where it is no longer needed.
1402 Description: lconf incorrectly determined whether two IP networks could talk
1403 Details : In some more complicated routing and multiple-network
1404 configurations, lconf will avoid trying to make a network
1405 connection to a disjoint part of the IP space. It was doing the
1406 math incorrectly for one set of cases.
1411 Description: Fix for potential infinite loop processing records in an llog.
1412 Details : If an llog record is corrupted/zeroed, it is possible to loop
1413 forever in llog_process(). Validate the llog record length
1414 and skip the remainder of the block on error.
1417 Frequency : occasional (liblustre only)
1419 Description: liblustre could not open files whose last component is a symlink
1420 Details : sysio_path_walk() would incorrectly pass the open intent to
1421 intermediate path components.
1424 Frequency : rare (liblustre only with non-standard tuning)
1425 Bugzilla : 7201 (7350)
1426 Description: Tuning the MDC DLM LRU size to zero triggers client LASSERT
1427 Details : llu_lookup_finish_locks() tries to set lock data on a lock
1428 after it has been released, only do this for referenced locks
1430 Severity : enhancement
1432 Description: specifying an (invalid) directory default stripe_size of -1
1433 would reset the directory default striping
1434 Details : stripe_size -1 was used internally to signal directory stripe
1435 removal, now use "all default" to signal dir stripe removal
1436 as a directory striping of "all default" is not useful
1439 Frequency : common for large clusters running liblustre clients
1441 Description: doing an ls when liblustre clients are running is slow
1442 Details : sending a glimpse AST to a liblustre client waits for every AST
1443 to time out, as liblustre clients will not respond. Since they
1444 cannot cache data we refresh the OST lock LVB from disk instead.
1446 Severity : enhancement
1448 Description: doing an ls at the same time as file IO can be slow
1449 Details : enqueue and other "small" requests can be blocked behind many
1450 large IO requests. Create a new OST IO portal for non-IO
1451 requests so they can be processed faster.
1454 Frequency : rare (only HPUX clients mounting unsupported re-exported NFS vol)
1456 Description: an HPUX NFS client would get -EACCESS when ftruncate()ing a newly
1457 created file with mode 000
1458 Details : the Linux NFS server relies on an MDS_OPEN_OWNEROVERRIDE hack to
1459 allow an ftruncate() as a non-root user to a file with mode 000.
1460 Lustre now respects this flag to disable mode checks when
1461 truncating a file owned by the user
1464 Frequency : liblustre-only, when liblustre client dies unexpectedly or becomes
1467 Description: Revoking locks from clients that went dead or catatonic might take
1469 Details : New lock flags FL_CANCEL_ON_BLOCK used by liblustre makes
1470 cancellation of such locks instant on servers without waiting for
1471 any reply from clients. Clients drops these locks when cancel
1472 notification from server is received without replying.
1475 Frequency : liblustre-only, when liblustre client dies or becomes busy
1477 Description: Doing ls on Linux clients can take a long time with active
1479 Details : Liblustre client cannot handle ASTs in timely manner, so avoid
1480 granting such locks to it in the first place if possible. Locks
1481 are taken by proxy on the OST during the read or write and
1482 dropped immediately afterward. Add connect flags handling, do
1483 not grant locks to liblustre clients for glimpse ASTs.
1485 Severity : enhancement
1487 Description: Improve read-ahead algorithm to avoid excessive IO for random reads
1488 Details : Existing read-ahead algorithm is tuned for the case of streamlined
1489 sequential reads and behaves badly with applications doing random
1490 reads. Improve it by reading ahead at least read region, and
1491 avoiding excessive large RPC for small reads.
1493 Severity : enhancement
1495 Description: Creating more than 1000 files for a single job may cause a load
1496 imbalance on the OSTs if there are also a large number of OSTs.
1497 Details : qos_prep_create() uses an OST index reseed value that is an
1498 even multiple of the number of available OSTs so that if the
1499 reseed happens in the middle of the object allocation it will
1500 still utilize the OSTs as uniformly as possible.
1505 Description: OST or MDS may oops in ping_evictor_main()
1506 Details : ping_evictor_main() drops obd_dev_lock if deleting a stale export
1507 but doesn't restart at beginning of obd_exports_timed list
1510 Severity : enhancement
1512 Description: improve by-nid export eviction on the MDS and OST
1513 Details : allow multiple exports with the same NID to be evicted at one
1514 time without re-searching the exports list.
1517 Frequency : rare, only with supplementary groups enabled on SMP 2.6 kernels
1519 Description: MDS may oops in groups_free()
1520 Details : in rare race conditions a newly allocated group_info struct is
1521 freed again, and this can be NULL. The 2.4 compatibility code
1522 for groups_free() checked for a NULL pointer, but 2.6 did not.
1525 Frequency : common for liblustre clients doing little filesystem IO
1526 Bugzilla : 9352, 7313
1527 Description: server may evict liblustre clients accessing contended locks
1528 Details : if a client is granted a lock or receives a completion AST
1529 with a blocking AST already set it would not reply to the AST
1530 for LDLM_FL_CANCEL_ON_BLOCK locks. It now replies to such ASTs.
1533 Frequency : lfs setstripe, only systems with more than 160 OSTs
1535 Description: unable to set striping with a starting offset beyond OST 160
1536 Details : llapi_create_file() incorrectly limited the starting stripe
1537 index to the maximum single-file stripe count.
1540 Frequency : LDAP users only
1542 Description: lconf did not handle in-kernel recovery with LDAP properly
1543 Details : lconf/LustreDB get_refs() is searching the wrong namespace
1545 Severity : enhancement
1547 Description: bind OST threads to NUMA nodes to improve performance
1548 Details : all OST threads are uniformly bound to CPUs on a single NUMA
1549 node and do their allocations there to localize memory access
1551 Severity : enhancement
1553 Description: llmount can determine client NID directly from Myrinet (GM)
1554 Details : the client NID code from gmnalnid was moved directly into
1555 llmount, removing the need to use this or specifying the
1556 client NID explicitly when mounting GM clients with zeroconf
1559 Frequency : if client is started with down MDS
1561 Description: if client is started with down MDS mount hangs in ptlrpc_queue_wait
1562 Details : Having an LWI_INTR() wait event (interruptible, but no timeout)
1563 will wait indefinitely in ptlrpc_queue_wait->l_wait_event() after
1564 ptlrpc_import_delayed_req() because we didn't check if the
1565 request was interrupted, and we also didn't break out of the
1566 event loop if there was no timeout
1571 Description: data loss during non-page-aligned writes to a single file from
1572 both multiple nodes and multiple threads on one node at same time
1573 Details : updates to KMS and lsm weren't protected by common lock. Resulting
1574 inconsistency led to false short-reads, that were cached and later
1575 used by ->prepare_write() to fill in partially written page,
1576 leading to data loss.
1579 Frequency : always, if lconf --abort_recovery used
1581 Description: lconf --abort_recovery fails with 'Operation not supported'
1582 Details : lconf was attempting to abort recovery on the MDT device and not
1585 Severity : enhancement
1587 Description: remove cleanup logs
1588 Details : replace lconf-generated cleanup logs with lustre internal
1589 cleanup routines. Eliminates the need for client-cleanup and
1592 Severity : enhancement
1594 Description: add support for EAs (user and system) on lustre filesystems
1595 Details : it is now possible to store extended attributes in the Lustre
1596 client filesystem, and with the user_xattr mount option it
1597 is possible to allow users to store EAs on their files also
1599 Severity : enhancement
1601 Description: Add possibility (config option) to show minimal available OST free
1603 Details : When compiled with --enable-mindf configure option, statfs(2)
1604 (and so, df) will return least minimal free space available from
1605 all OSTs as amount of free space on FS, instead of summary of
1606 free spaces of all OSTs.
1608 Severity : enhancement
1610 Description: do not expand extent locks acquired on OST-side
1611 Details : Modify ldlm_extent_policy() to not expand local locks, acquired
1612 by server: they are not cached anyway.
1615 Frequency : when mmap is used/binaries executed from Lustre
1617 Description: Unmmap pages before throwing them away from read cache.
1618 Details : llap_shrink cache now attempts to unmap pages before discarding
1619 them (if unmapping failed - do not discard). SLES9 kernel has
1620 extra checks that trigger if this unmapping is not done first.
1625 Description: lconf didn't resolve symlinks before checking to see whether a
1626 given mountpoint was already in use
1629 Frequency : when migrating failover services
1630 Bugzilla : 6395, 9514
1631 Description: When migrating a subset of services from a node (e.g. failback
1632 from a failover service node) the remaining services would
1633 time out and evict clients.
1634 Details : lconf --force (implied by --failover) sets the global obd_timeout
1635 to 5 seconds in order to quickly disconnect, but this caused
1636 other RPCs to time out too quickly. Do not change the global
1637 obd_timeout for force cleanup, only set it for DISCONNECT RPCs.
1639 Severity : enhancement
1640 Frequency : if MDS is started with down OST
1641 Bugzilla : 9439,5706
1642 Description: Allow startup/shutdown of an MDS without depending on the
1643 availability of the OSTs.
1644 Details : Asynchronously call mds_lov_synchronize during MDS startup.
1645 Add appropriate locking and lov-osc refcounts for safe
1646 cleaning. Add osc abort_inflight calls in case the
1647 synchronize never started.
1650 Frequency : occasional (Cray XT3 only)
1652 Description: root not authorized to access files in CRAY_PORTALS environment
1653 Details : The client process capabilities were not honoured on the MDS in
1654 a CRAY_PORTALS/CRAY_XT3 environment. If the file had previously
1655 been accessed by an authorized user then root was able to access
1656 the file on the local client also. The root user capabilities
1657 are now allowed on the MDS, as this environment has secure UID.
1660 Frequency : occasional
1662 Description: ldiskfs "too long searching" message happens too often
1663 Details : A debugging message (otherwise harmless) prints too often on
1664 the OST console. This has been reduced to only happen when
1665 there are fragmentation problems on the filesystem.
1670 Description: Division by zero in statfs when all OSCs are inactive
1671 Details : lov_get_stripecnt() returns zero due to incorrect order of checks,
1672 lov_statfs divides by value returned by lov_get_stripecnt().
1676 Bugzilla : 9489, 3273
1677 Description: First write from each client to each OST was only 4kB in size,
1678 to initialize client writeback cache, which caused sub-optimal
1679 RPCs and poor layout on disk for the first writen file.
1680 Details : Clients now request an initial cache grant at (re)connect time
1681 and so that they can start streaming writes to the cache right
1682 away and always do full-sized RPCs if there is enough data.
1683 If the OST is rebooted the client also re-establishes its grant
1684 so that client cached writes will be honoured under the grant.
1689 Description: Slow ls (and stat(2) syscall) on files residing on IO-loaded OSTs
1690 Details : Now I/O RPCs go to different portal number and (presumably) fast
1691 lock requests (and glimses) and other RPCs get their own service
1692 threads pool that should be able to service those RPCs
1695 Severity : enhancement
1697 Description: Ability to exchange lustre version between client and servers and
1698 issue warnings at client side if client is too old. Also for
1699 liblustre clients there is ability to refuse connection of too old
1701 Details : New 'version' field is added to connect data structure that is
1702 filled with version info. That info is later checked by server and
1706 Frequency : rare, liblustre only.
1707 Bugzilla : 9296, 9581
1708 Description: Two simultaneous writes from liblustre at offset within same page
1709 might proceed at the same time overwriting eachother with stale
1711 Details : I/O lock withing llu_file_prwv was released too early, before data
1712 actually was hitting the wire. Extended lock-holding time until
1713 server acknowledges receiving data.
1716 Frequency : extremely rare. Never observed in practice.
1718 Description: avoid generating lustre_handle cookie of 0.
1719 Details : class_handle_hash() generates handle cookies by incrementing
1720 global counter, and can hit 0 occasionaly (this is unlikely, but
1721 not impossible, because initial value of cookie counter is
1722 selected randonly). Value of 0 is used as a sentinel meaning
1723 "unassigned handle" --- avoid it. Also coalesce two critical
1724 sections in this function into one.
1726 Severity : enhancement
1728 Description: allow liblustre clients to delegate truncate locking to OST
1729 Details : To avoid overhead of locking, liblustre client instructs OST to
1730 take extent lock in ost_punch() on client's behalf. New connection
1731 flag is added to handle backward compatibility.
1733 Severity : enhancement
1734 Bugzilla : 4928, 7341, 9758
1735 Description: allow number of OST service threads to be specified
1736 Details : a module parameter allows the number of OST service threads
1737 to be specified via "options ost ost_num_threads={N}" in the
1738 OSS's /etc/modules.conf or /etc/modprobe.conf.
1742 Bugzilla : 6146, 9635, 9895
1743 Description: servers crash with bad pointer in target_handle_connect()
1744 Details : In rare cases when a client is reconnecting it was possible that
1745 the connection request was the last reference for that export.
1746 We would temporarily drop the export reference and get a new
1747 one, but this may have been the last reference and the export
1748 was just destroyed. Get new reference before dropping old one.
1750 Severity : enhancement
1751 Frequency : if client is started with failover MDS
1753 Description: Allow multiple MDS hostnames in the mount command
1754 Details : Try to read the configuration from all specified MDS
1755 hostnames during a client mount in case the "primary"
1758 Severity : enhancement
1760 Description: Stop sending data to evicted clients as soon as possible.
1761 Details : Check if the client we are about to send or are sending data to
1762 was evicted already. (Check is done every second of waiting,
1763 for which l_wait_event interface was extended to allow checking
1764 of exit condition at specified intervals).
1767 Frequency : rare, normally only when NFS exporting is done from client
1769 Description: 'bad disk LOV MAGIC: 0x00000000' error when chown'ing files
1771 Details : Make mds_get_md() recognise empty md case and set lmm size to 0.
1774 Frequency : always, if srand() is called before liblustre initialization
1776 Description: Liblustre uses system PRNG disturbing its usage by user application
1777 Details : Introduce internal to lustre fast and high-quality PRNG for
1778 lustre usage and make liblustre and some other places in generic
1779 lustre code to use it.
1781 Severity : enhancement
1782 Bugzilla : 9477, 9557, 9870
1783 Description: Verify that the MDS configuration logs are updated when xml is
1784 Details : Check if the .xml configuration logs are newer than the config
1785 logs stored on the MDS and report an error if this is the case.
1786 Request --write-conf, or allow starting with --old_conf.
1788 Severity : enhancement
1790 Description: Handle symlinks in the path when checking if Lustre is mounted.
1791 Details : Resolve intermediate symlinks when checking if a client has
1792 mounted a filesystem to avoid duplicate client mounts.
1797 Description: lconf can hit an error exception but still return success.
1798 Details : The lconf command catches the Command error exception at the top
1799 level script context and will exit with the associated exit
1800 status, but doesn't ensure that this exit status is non-zero.
1805 Description: failure of ptlrpc thread startup can cause oops
1806 Details : Starting a ptlrpc service thread can fail if there are a large
1807 number of threads or the server memory is very fragmented.
1808 Handle this without oopsing.
1811 Frequency : always, only if liblustre and non-default acceptor port was used
1813 Description: liblustre cannot connect to servers with non-default acceptor port
1814 Details : tcpnal_set_default_params() was not called and was therefore
1815 ignoring the environment varaible TCPNAL_PORT, as well as other
1816 TCPNAL_ environment variables
1821 Description: two objects could be created on the same OST for a single file
1822 Details : If an OST is down, in some cases it was possible to create two
1823 objects on a single OST for a single file. No problems other
1824 than potential performance impact and spurious error messages.
1828 Bugzilla : 5681, 9562
1829 Description: Client may oops in ll_unhash_aliases
1830 Details : Client dcache may become inconsistent in race condition.
1831 In some cases "getcwd" can fail if the current directory is
1837 Description: Inode refcounting problems in NFS export code
1838 Details : link_raw functions used to call d_instantiate without obtaining
1839 extra inode reference first.
1843 Bugzilla : 9942, 9903
1844 Description: Referencing freed requests leading to crash, memleaks with NFS.
1845 Details : We used to require that call to ll_revalidate_it was always
1846 followed by ll_lookup_it. Also with revalidate_special() it is
1847 possible to call ll_revalidate_it() twice for the same dentry
1848 even if first occurence returned success. This fix changes semantic
1849 between DISP_ENQ_COMPLETE disposition flag to mean there is extra
1850 reference on a request referred from the intent.
1851 ll_intent_release() then releases such a request.
1854 Frequency : rare, normally benchmark loads only
1856 Description: unlinked inodes were kept in memory on the client
1857 Details : If a client is repeatedly creating and unlinking files it
1858 can accumulate a lot of stale inodes in the inode slab cache.
1859 If there is no other client load running this can cause the
1860 client node to run out of memory. Instead flush old inodes
1861 from client cache that have the same inode number as a new inode.
1864 Frequency : SLES9 2.6.5 kernel and long filenames only
1865 Bugzilla : 9969, 10379
1866 Description: utime reports stale NFS file handle
1867 Details : SLES9 uses out-of-dentry names in some cases, which confused
1868 the lustre dentry revalidation. Change it to always use the
1872 Frequency : rare, unless heavy write-truncate concurrency is continuous
1873 Bugzilla : 4180, 6984, 7171, 9963, 9331
1874 Description: OST becomes very slow and/or deadlocked during object unlink
1875 Details : filter_destroy() was holding onto the parent directory lock
1876 while truncating+unlinking objects. For very large objects this
1877 may block other threads for a long time and slow overall OST
1878 responsiveness. It may also be possible to get a lock ordering
1879 deadlock in this case, or run out of journal credits because of
1880 the combined truncate+unlink. Solution is to do object truncate
1881 first in one transaction without parent lock, and then do the
1882 final unlink in a new transaction with the parent lock. This
1883 reduces the lock hold time dramatically.
1886 Frequency : rare, 2.4 kernels only
1888 Description: MDS or OST cleanup may trip kernel BUG when dropping kernel lock
1889 Details : mds_cleanup() and filter_cleanup() need to drop the kernel lock
1890 before unmounting their filesystem in order to avoid deadlock.
1891 The kernel_locked() function in 2.4 kernels only checks whether
1892 the kernel lock is held, not whether it is this process that is
1893 holding it as 2.6 kernels do.
1898 Description: MDS or OST may oops/LBUG if a client is connecting multiple times
1899 Details : The client ptlrpc code may be trying to reconnect to a down
1900 server before a previous connection attempt has timed out.
1901 Increase the reconnect interval to be longer than the connection
1902 timeout interval to avoid sending duplicate connections to
1906 Frequency : echo_client brw_test command
1908 Description: fix echo_client to work with OST preallocated code
1909 Details : OST preallocation code (5137) didn't take echo_client IO path
1910 into account: echo_client calls filter methods outside of any
1911 OST thread and, hence, there is no per-thread preallocated
1912 pages and buffers to use. Solution: hijack pga pages for IO. As
1913 a byproduct, this avoids unnecessary data copying.
1917 Bugzilla : 3555, 5962, 6025, 6155, 6296, 9574
1918 Description: Client can oops in mdc_commit_close() after open replay
1919 Details : It was possible for the MDS to return an open request with no
1920 transaction number in mds_finish_transno() if the client was
1921 evicted, but without actually returning an error. Clients
1922 would later try to replay that open and may trip an assertion
1923 Simplify the client close codepath, and always return an error
1924 from the MDS in case the open is not successful.
1927 Frequency : rare, 2.6 OSTs only
1929 Description: OST may deadlock under high load on fragmented files
1930 Details : If there was a heavy load and highly-fragmented OST filesystems
1931 it was possible to have all the OST threads deadlock waiting on
1932 allocation of biovecs, because the biovecs were not released
1933 until the entire RPC IO was completed. Instead, release biovecs
1934 as soon as they are complete to ensure forward IO progress.
1936 Severity : enhancement
1938 Description: Support for specifying external journal device at mount
1939 Details : If an OST or MDS device is formatted with an external journal
1940 device, this device major/minor is stored in the ext3 superblock
1941 and may not be valid for failover. Allow detecting and
1942 specifying the external journal at mount time.
1947 Description: Mounting an MDS with pending unlinked files may cause oops
1948 Details : target_finish_recovery() calls mds_postrecov() which returned
1949 the number of orphans unlinked. mds_lov_connect->mds_postsetup()
1950 considers this an error and immediately begins cleaning up the
1951 lov, just after starting the mds_lov process
1953 Severity : enhancement
1955 Description: Implement 'lfs df' to report actual free space on per-OST basis
1956 Details : Add sub-command 'df' on 'lfs' to report the disk space usage of
1957 MDS/OSDs. Usage: lfs df [-i][-h]. Command Options: '-i' to report
1958 usage of objects; '-h' to report in human readable format.
1960 ------------------------------------------------------------------------------
1962 2005-08-26 Cluster File Systems, Inc. <info@clusterfs.com>
1969 Description: Mounting an ldiskfs file system with mballoc may crash OST node.
1970 Details : ldiskfs mballoc code may reference an uninitialized buddy struct
1971 at startup during orphan unlinking. Instead, skip buddy update
1972 before setup, as it will be regenerated after recovery is complete.
1977 Description: If an OST is inactive, its locks might reference stale inodes.
1978 Details : lov_change_cbdata() must iterate over all namespaces, even if
1979 they are inactive to clear inode references from the lock.
1981 Severity : enhancement
1982 Frequency : occasional, if non-standard max_dirty_mb used
1984 Description: Client will block write RPCs if not enough grant
1985 Details : If a client has max_dirty_mb smaller than max_rpcs_in_flight,
1986 then the client will block writes while waiting for another RPC
1987 to complete instead of consuming its dirty limit. With change
1988 we get improved performance when max_dirty_mb is small.
1990 Severity : enhancement
1991 Bugzilla : 3389, 6253
1992 Description: Add support for supplementary groups on the MDS.
1993 Details : The MDS has an upcall /proc/fs/lustre/mds/{mds}/group_upcall
1994 (set to /usr/sbin/l_getgroups if enabled) which will do MDS-side
1995 lookups for user supplementary groups into a cache.
1999 Description: O_CREAT|O_EXCL open flags in liblustre always return -EEXIST
2000 Details : Make libsysio to not enforce O_EXCL by clearing the flag,
2001 for liblustre O_EXCL is enforced by MDS.
2005 Description: readdir never returns NULL in liblustre.
2006 Details : Corrected llu_iop_getdirentries logic, to return offset of next
2007 dentry in struct dirent.
2011 Frequency : liblustre only, depends on application IO pattern
2012 Description: liblustre clients evicted if not contacting servers
2013 Details : Don't put liblustre clients into the ping_evictor list, so
2014 they will not be evicted by the pinger ever.
2016 Severity : enhancement
2018 Description: Add ability to evict clients by NID from MDS.
2019 Details : By echoing "nid:$NID" string into
2020 /proc/fs/lustre/mds/.../evict_client client with nid that equals to
2021 $NID would be instantly evicted from this MDS and from all active
2022 OSTs connected to it.
2026 Description: Do not query file size twice, somewhat slowing stat(2) calls.
2027 Details : lookup_it_finish() used to query file size from OSTs that was not
2032 Description: service threads change working directory to that of init
2033 Details : Starting lustre service threads may pin the working directory
2034 of the parent thread, making that filesystem busy. Threads
2035 now change to the working directory of init to avoid this.
2039 Frequency : during shutdown only
2040 Description: shutdown with a failed MDS or OST can cause unmount to hang
2041 Details : Don't resend DISCONNECT messages in ptlrpc_disconnect_import()
2046 Frequency : 2.6 only
2047 Description: chmod/chown may include an extra supplementary group
2048 Details : ll{,u}_mdc_pack_op_data() does not properly initialize the
2049 supplementary group and if none is specified this is used.
2052 Bugzilla : 5479 (6816)
2054 Description: Racing open + rm can assert client in mdc_set_open_replay_data()
2055 Details : If lookup is in progress on a file that is unlinked we might try
2056 to revalidate the inode and fail in revalidate after lookup is
2057 complete and ll_file_open() enqueues the open again but
2058 it_open_error() was not checking DISP_OPEN_OPEN errors correctly.
2061 Frequency : always, if lconf --abort_recovery used
2063 Description: lconf --abort_recovery fails with 'Operation not supported'
2064 Details : lconf was attempting to abort recovery on the MDT device and not
2067 ------------------------------------------------------------------------------
2069 2005-08-08 Cluster File Systems, Inc. <info@clusterfs.com>
2074 Frequency : rare (only unsupported configurations with a node running as an
2076 Bugzilla : 6514, 5137
2077 Description: Mounting a Lustre file system on a node running as an OST could
2079 Details : OSTs now preallocates memory needed to write out data at
2080 startup, instead of when needed, to avoid having to
2081 allocate memory in possibly low memory situations.
2082 Specifically, if the file system is mounted on on OST,
2083 memory pressure could force it to try to write out data,
2084 which it needed to allocate memory to do. Due to the low
2085 memory, it would be unable to do so and the node would
2086 become unresponsive.
2088 Severity : enhancement
2090 Description: Addition of lconf --service command line option
2091 Details : lconf now accepts a '--service <arg>' option, which is
2092 shorthand for 'lconf --group <arg> --select <arg>=<hostname>'
2094 Severity : enhancement
2096 Description: Failover mode is now the default for OSTs.
2097 Details : By default, OSTs will now run in failover mode. To return to
2098 the old behaviour, add '--failout' to the lmc line for OSTs.
2100 Severity : enhancement
2102 Description: Health checks are now provided for MDS and OSTs
2103 Details : Additional detailed health check information on MSD and OSTs
2104 is now provided through the procfs health_check value.
2107 Frequency : occasional, depends on IO load
2109 Description: Disk fragmentation on the OSTs could eventually cause slowdowns
2110 after numerous create/delete cycles
2111 Details : The ext3 inode allocation policy would not allocate new inodes
2112 very well on the OSTs because there are no new directories
2113 being created. Instead we look for groups with free space if
2114 the parent directories are nearly full.
2119 Description: Network or server problems during mount may cause partially
2120 mounted clients instead of returning an error.
2121 Details : The config llog parsing code may overwrite the error return
2122 code during mount error handling, returning success instead
2128 Description: MDS can fail to allocate large reply buffers
2129 Details : After long uptimes the MDS can fail to allocate large reply
2130 buffers (e.g. zconf client mount config records) due to memory
2131 fragmentation or consumption by the buffer cache. Preallocate
2132 some large reply buffers so that these replies can be sent even
2133 under memory pressure.
2137 Frequency : rare (liblustre)
2138 Description: fsx running with liblustre complained that using truncate() to
2139 extend the file doesn't work. This patch corrects that issue.
2140 Details : This is the liblustre equivalent of the fix for bug 6196. Fixes
2141 ATTR_SIZE and lsm use in llu_setattr_raw.
2145 Frequency : rare, only 2.6 kernels
2146 Description: Unusual file access patterns on the MDS may result in inode
2147 data being lost in very rare circumstances.
2148 Details : Bad interaction between the ea-in-inode patch and the "no-read"
2149 code in the 2.6 kernel caused the inode and/or EA data not to
2150 be read from disk, causing single-file corruption.
2154 Frequency : rare, only 2.6 filesystems using extents
2155 Description: Heavy concurrent write and delete load may cause data corruption.
2156 Details : It was possible under high-load situations to have an extent
2157 metadata block in the block device cache from a just-unlinked
2158 file overwrite a newly-allocated data block. We now unmap any
2159 metadata buffers that alias just-allocated data blocks.
2163 Frequency : filesystems with default stripe_count larger than 77
2164 Description: lconf+mke2fs fail when formatting filesystem with > 77 stripes
2165 Details : lconf specifies an inode size of 4096 bytes when the default
2166 stripe_count is larger than 77. This conflicts with the default
2167 inode density of 1 per 4096 bytes. Allocate smaller inodes in
2168 this case to avoid pinning too much memory for large EAs.
2170 ------------------------------------------------------------------------------
2172 2005-07-07 Cluster File Systems, Inc. <info@clusterfs.com>
2177 Frequency : rare (extremely heavy IO load with hundreds of clients)
2179 Description: Client is evicted, gets IO error writing to file
2180 Details : lock ordering changes for bug 5492 reintroduced bug 3267 and
2181 caused clients to be evicted for AST timeouts. The fixes in
2182 bug 5192 mean we no longer need to have such short AST timeouts
2183 so ldlm_timeout has been increased.
2186 Frequency : occasional during --force or --failover shutdown under load
2187 Bugzilla : 5949, 4834
2188 Description: Server oops/LBUG if stopped with --force or --failover under load
2189 Details : a collection of import/export refcount and cleanup ordering
2190 issues fixed for safer force cleanup
2193 Frequency : only filesystems larger than 120 OSTs
2194 Bugzilla : 5990, 6223
2195 Description: lfs getstripe would oops on a very large filesystem
2196 Details : lov_getconfig used kfree on vmalloc'd memory
2199 Frequency : only filesystems exporting via NFS to Solaris 10 clients
2200 Bugzilla : 6242, 6243
2201 Description: reading from files that had been truncated to a non-zero size
2202 but never opened returned no data
2203 Details : ll_file_read() reads zeros from no-object files to EOF
2208 Description: A bug in MDS/OSS recovery could cause the OSS to fail an assertion
2209 Details : There's little harm in aborting MDS/OSS recovery and letting it
2210 try again, so I removed the LASSERT and return an error instead.
2212 Severity : enhancement
2214 Description: New debugging infrastructure for tracking down data corruption
2215 Details : The I/O checksum code was replaced to: (a) control it at runtime,
2216 (b) cover more of the client-side code path, and (c) try to narrow
2217 down where problems occurred
2221 Bugzilla : 3819, 4364, 4397, 6313
2222 Description: Racing close and eviction MDS could cause assertion in mds_close
2223 Details : It was possible to get multiple mfd references during close and
2224 client eviction, leading to one thread referencing a freed mfd.
2226 Severity: : enhancement
2227 Bugzilla : 3262, 6359
2228 Description: Attempts to reconnect to servers are now more aggressive.
2229 Details : This builds on the enhanced upcall-less recovery that was added
2230 in 1.4.2. When trying to reconnect to servers, clients will
2231 now try each server in the failover group every 10 seconds. By
2232 default, clients would previously try one server every 25 seconds.
2237 Description: After recovery, certain operations trigger a failed
2238 assertion on a client.
2239 Details : Failing over an mds, using lconf -d --failover, while a
2240 client was doing a readdir() call would cause the client to
2241 LBUG after recovery completed and the readdir() was resent.
2243 Severity : enhancement
2245 Description: Default groups are now added by lconf
2246 Details : You can now run lconf --group <servicename> without having to
2247 manually add groups with lmc.
2250 Frequency : occasional
2252 Description: Nodes with an elan id of 0 trigger a failed assertion
2255 Frequency : always when accessing e.g. tty/console device nodes
2257 Description: tty and some other devices nodes cannot be used on lustre
2258 Details : file's private_data field is used by device data and lustre
2259 values in there got lost. New field was added to struct file to
2260 store fs-specific private data.
2263 Frequency : when exporting Lustre via NFS
2265 Description: NFSD failed occasionally when looking up a path component
2266 Details : NFSD is looking up ".." which was broken in ext3 directories
2267 that had grown large enough to become hashed.
2270 Frequency : Clusters with multiple interfaces not on the same subnet
2272 Description: Nodes will repeatedly try to reconnect to an interface which it
2273 cannot reach and report an error to the log.
2274 Details : Extra peer list entries will be created by lconf with some peers
2275 unreachable. lconf now validates the peer before adding it.
2278 Frequency : Only if a default stripe is set on the filesystem root.
2280 Description: Setting a default stripe on the filesystem root prevented the
2281 filesystem from being remounted.
2282 Details : The client was sending extra request flags in the root getattr
2283 request and did not allocate a reply buffer for the dir EA.
2286 Frequency : occasional, higher if lots of files are accessed by one client
2287 Bugzilla : 6159, 6097
2288 Description: Client trips assertion regarding lsm mismatch/magic
2289 Details : While revalidating inodes the VFS looks up inodes with ifind()
2290 and in rare cases can find an inode that is being freed.
2291 The ll_test_inode() code will free the lsm during ifind()
2292 when it finds an existing inode and then the VFS later attaches
2293 this free lsm to a new inode.
2297 Bugzilla : 6422, 7030
2298 Description: MDS deadlock between mkdir and client eviction
2299 Details : Creating a new file via mkdir or mknod (starting a transaction
2300 and getting the ns lock) can deadlock with client eviction
2301 (gets ns lock and trying to finish a synchronous transaction).
2304 Frequency : occasional
2305 Description: While starting a server, the fsfilt_ext3 module could not be
2307 Details : CFS's improved ext3 filesystem is named ldiskfs for 2.6
2308 kernels. Previously, lconf would still use the ext3 name
2309 when trying to load modules. Now, it will correctly use
2310 ext3 on 2.4 and ldiskfs on 2.6.
2312 Severity : enhancement
2313 Description: The default stripe count has been changed to 1
2314 Details : The interpretation of the default stripe count (0, to lfs
2315 or lmc) has been changed to mean striping across a single
2316 OST, rather than all available. For general usage we have
2317 found a stripe count of 1 or 2 works best.
2319 Severity : enhancement
2320 Description: Add support for compiling against Cray portals.
2321 Details : Conditional compiling for some areas that are different
2325 Frequency : occasional
2326 Bugzilla : 6409, 6834
2327 Description: Creating files with an explicit stripe count may lead to
2328 a failed assertion on the MDS
2329 Details : If some OSTs are full or unavailable, creating files may
2330 trigger a failed assertion on the MDS. Now, Lustre will
2331 try to use other servers or return an error to the
2335 Frequency : occasional
2337 Description: Multiple concurrent overlapping read+write on multiple SMP nodes
2338 caused lock timeout during readahead (since 1.4.2).
2339 Details : Processes doing readahead might match a lock that hasn't been
2340 granted yet if there are overlapping and conflicting lock
2341 requests. The readahead process waits on ungranted lock
2342 (original lock is CBPENDING), while OST waits for that process
2343 to cancel CBPENDING read lock and eventually evicts client.
2345 Severity : enhancement
2347 Description: Initial enabling of flock support for clients
2348 Details : Implements fcntl advisory locking and file status functions.
2349 This feature is provided as an optional mount flag (default
2350 off), and is NOT CURRENTLY SUPPORTED. Not all types of record
2351 locking are implemented yet, and those that are are not guaranteed
2352 to be completely correct in production environments.
2353 mount -t lustre -o [flock|noflock] ...
2356 Frequency : occasional
2358 Description: OSTs running 2.4 kernels but with extents enabled might trip an
2359 assertion in the ext3 JBD (journaling) layer.
2360 Details : The b_committed_data struct is protected by the big kernel lock
2361 in 2.4 kernels, serializing journal_commit_transaction() and
2362 ext3_get_block_handle->ext3_new_block->find_next_usable_block()
2363 access to this struct. In 2.6 kernels there is finer grained
2364 locking to improve SMP performance of the JBD layer.
2368 Description: Changes the "SCSI I/O Stats" kernel patch to default to "enabled"
2370 -----------------------------------------------------------------------------
2372 2005-05-05 Cluster File Systems, Inc. <info@clusterfs.com>
2374 NOTE: Lustre 1.4.2 uses an incompatible network protocol than previous
2375 versions of Lustre. Please update all servers and clients to
2376 version 1.4.2 or later at the same time. You must also run
2377 "lconf --write-conf {config}.xml" on the MDS while it is stopped
2378 to update the configuration logs.
2380 - fix for HPUX NFS client breakage when NFS exporting Lustre (5781)
2381 - mdc_enqueue does not need max_mds_easize request buffer on send (5707)
2382 - swab llog records of type '0' so we get proper header size/idx (5861)
2383 - send llog cancel req to DLM cancel portal instead of cb portal (5515)
2384 - fix rename of one directory over another leaking an inode (5953)
2385 - avoid SetPageDirty on 2.6 (5981)
2386 - don't re-add just-being-destroyed locks to the waiting list (5653)
2387 - when creating new directories, inherit the parent's custom
2388 striping settings if present parent (3048)
2389 - flush buffers from cache before direct IO in 2.6 obdfilter (4982)
2390 - don't hold i_size_sem in ll_nopage() and ll_ap_refresh_count (6077)
2391 - don't hold client locks on temporary worklist from l_lru (5666)
2392 - handle IO errors in 2.6 obdfilter bio completion routine (6046)
2393 - automatically evict dead clients (5921)
2394 - Update file size properly in create+truncate+fstat case (6196)
2395 - Do not unhash mountpoint dentries, do not allow removal of
2397 - Avoid lock ordering deadlock issue with write/truncate (6203,5654)
2398 - reserve enough journal credits in fsfilt_start_log for setattr (4554)
2399 - ldlm_enqueue freed-export error path would always LBUG (6149,6184)
2400 - don't reference lr_lvb_data until after we hold lr_lvb_sem (6170)
2401 - don't overwrite last_rcvd if there is a *_client_add() error (6086)
2402 - Correctly handle reads of files with no objects (6243)
2403 - lctl recover will also mark a device active if deactivate used (5933)
2405 - by default create 1 inode per 4kB space on MDS, per 16kB on OSTs
2406 - allow --write-conf on an MDS with different nettype than client (5619)
2407 - don't write config llogs to MDS for mounts not from that MDS (5617)
2408 - lconf should create multiple TCP connections from a client (5201)
2409 - init scripts are now turned off by default; run chkconfig --on
2410 lustre and chkconfig --on lustrefs to use them
2411 - upcalls are no longer needed for clients to recover to failover
2413 - add --abort-recovery option to lconf to abort recovery on device
2415 - add support for an arbitrary number of OSTs (3026)
2416 - Quota support protocol changes.
2417 - forward compatibility changes to wire structs (6007)
2418 - rmmod NALs that might be loaded because of /etc/modules.conf (6133)
2419 - support for mountfsoptions and clientoptions to the Lustre LDAP (5873)
2420 - improved "lustre status" script
2421 - initialize blocksize for non-regular files (6062)
2422 - added --disable-server and --disable-client configure options (5782)
2423 - introduce a lookup cache for lconf to avoid repeated DB scans (6204)
2424 - Vanilla 2.4.29 support
2425 - increase maximum number of obd devices to 520 (6242)
2426 - remove the tcp-zero-copy patch from the suse-2.4 series (5902)
2427 - Quadrics Elan drivers are now included for the RHEL 3 2.4.21 and
2428 SLES 9 2.6.5 kernels
2429 - limit stripes per file to 160 (the maximum EA size) (6093)
2431 2005-03-22 Cluster File Systems, Inc. <info@clusterfs.com>
2434 - don't LASSERT in ll_release on NULL lld with NFS export (4655, 5760)
2435 - hold NS lock when calling handle_ast_error->del_waiting_lock (5746)
2436 - fix setattr mtime regression from lovcleanup merge (4829, 5669)
2437 - workaround for 2.6 crash in ll_unhash_aliases (5687, 5210)
2438 - small ext3 extents cleanups and fixes (5733)
2439 - improved mballoc code, several small races and bugs fixed (5733, 5638)
2440 - kernel version 43 - fix remove_suid bugs in both 2.4 and 2.6 (5695)
2441 - avoid needless client->OST connect, fix handle mismatch (5317)
2442 - fix DLM error path that led to out-of-sync client, long delays (5779)
2443 - support common vfs-enforced mount options (nodev,nosuid,noexec) (5637)
2444 - fix several locking issues related to i_size (5492,5624,5654,5672)
2445 - don't move pending lock onto export if it is already evicted (5683)
2446 - fix kernel oops when creating .foo in unlinked directory (5548)
2447 - fix deadlock in obdfilter statistics vs. object create (5811)
2448 - use time_{before,after} to avoid timer jiffies wrap (5882)
2449 - shutdown --force/--failover stability (3607,3651,4797,5203,4834)
2450 - Do not leak request if server was not able to process it (5154)
2451 - If mds_open unable to find parent dir, make that negative lookup(5154)
2452 - don't create new directories with extent-mapping (5909, 5936)
2454 - fix lustre/lustrefs init scripts for SuSE (patch from Scali, 5702)
2455 - don't hold the pinger_sem in ptlrpc_pinger_sending_on_import
2456 - change obd_increase_kms to obd_adjust_kms (up or down) (5654)
2457 - lconf, lmc search both /usr/lib and /usr/lib64 for Python libs (5800)
2458 - support for RHEL4 kernel on i686 (5773)
2459 - provide error messages when incompatible logs are encountered (5898)
2461 2005-02-18 Cluster File Systems, Inc. <info@clusterfs.com>
2462 * version 1.4.0.10 (1.4.1 release candidate 1)
2464 - don't keep a lock reference when lock is not granted (4238)
2465 - unsafe list practices (rarely) led to infinite eviction loop (4908)
2466 - add per-fs limit of Lustre pages in page cache, avoid OOM (4699)
2467 - drop import inflight refcount on signal_completed_replay error (5255)
2468 - unlock page after async write error during send (3677)
2469 - handle missing objects in filter_preprw_read properly (5265)
2470 - no transno return for symlink open, don't save no-trasno open (3440)
2471 - don't try to complete elan receive that already failed (4012)
2472 - free RPC server reply state on error (5406)
2473 - clean up thread from ptlrpc_start_thread() on error (5160)
2474 - readahead could read extra page into cache that wasn't ejected (5388)
2475 - prevent races in class_attach/setup/cleanup/detach (5260)
2476 - don't dereference de->d_inode after l_dput of de (5458)
2477 - use "int" for stripe value returned from lock_to_stripe (5544)
2478 - mballoc allocation and error-checking fixes in 2.6 (5504)
2479 - block device patches to fix I/O request sizes in 2.6 (5482)
2480 - look up hostnames for IB nals (5602)
2481 - 2.6 changed lock ordering of 2 semaphores, caused deadlock (5654)
2482 - don't start multiple acceptors for the same port (5277)
2483 - fix incorrect LASSERT in mds_getattr_name (5635)
2484 - export a proc file for general "ping" checking (5628)
2485 - fix "lfs check" to not block when the MDS is down (5628)
2487 - service request history (4965)
2488 - put {ll,lov,osc}_async_page structs in a single slab (4699)
2489 - create an "evict_client" /proc entry on OSTs, like the MDS has
2490 - fix mount usage message, return errors per mount(8) (5168)
2491 - change grep [] to grep "[]" in tests so they work in more UMLs
2492 - fix ppc64/x86_64 spec to use %{_libdir} instead of /usr/lib (5389)
2493 - remove ancient LOV_MAGIC_V0 EA support (5047)
2494 - add "disk I/Os in flight" and "I/O req time" stats in obdfilter
2495 - align r/w RPCs to PTLRPC_MAX_BRW_SIZE boundary for performance (3451)
2496 - allow readahead allocations to fail when low on memory (5383)
2497 - mmap locking landed again, after considerable improvement (2828)
2498 - add get_hostaddr() to lustreDB.py for LDAP support (5459)
2500 2004-11-23 Cluster File Systems, Inc. <info@clusterfs.com>
2503 - send OST transaction number in read/write reply to free req (4966)
2504 - don't ASSERT in ptl_send_rpc() if we run out of memory (5119)
2505 - lock /proc/sys/portals/routes internal state, avoiding oops (4827)
2506 - the watchdog thread now runs as interruptible (5246)
2507 - flock/lockf fixes (but it's still disabled, pending 5135)
2508 - don't use EXT3 constants in llite code (5094)
2509 - memory shortage at startup could cause assertion (5176)
2511 - reorganization of lov code
2512 - single portals codebase
2514 - add extents/mballoc support (5025)
2515 - direct I/O reads in the obdfilter (4048)
2516 - kernel patches from LNXI for 2.6 (bluesmoke, perfctr, mtd, kexec)
2518 tbd Cluster File Systems, Inc. <info@clusterfs.com>
2521 - send OST transaction number in read/write reply to free req (4966)
2522 - don't ASSERT in ptl_send_rpc() if we run out of memory (5119)
2523 - lock /proc/sys/portals/routes internal state, avoiding oops (4827)
2524 - the watchdog thread now runs as interruptible (5246)
2525 - handle missing objects in filter_preprw_read properly (5265)
2526 - unsafe list practices (rarely) led to infinite eviction loop (4908)
2527 - drop import inflight refcount on signal_completed_replay error (5255)
2528 - unlock page after async write error during send (3677)
2529 - return original error code on reconstructed replies (3761)
2530 - no transno return for symlink open, don't save no-trasno open (3440)
2532 - add pid to ldlm debugging output (4922)
2533 - bump the watchdog timeouts -- we can't handle 30sec yet
2534 - extra debugging for orphan dentry/inode bug (5259)
2536 2004-11-16 Cluster File Systems, Inc. <info@clusterfs.com>
2539 - fix TCP_NODELAY bug, which caused extreme perf regression (5134)
2540 - allocate qswnal tx descriptors singly to avoid fragmentation (4504)
2541 - don't LBUG on obdo_alloc() failure, use OBD_SLAB_ALLOC() (4800)
2542 - fix NULL dereference in /proc/sys/portals/routes (4827)
2543 - allow failed mdc_close() operations to be interrupted (4561)
2544 - stop precreate on OST before MDS would time out on it (4778)
2545 - don't send partial-page writes before EOF from client (4410)
2546 - discard client grant for sub-page writes on large-page clients (4520)
2547 - don't free dentries not owned by NFS code, check generation (4806)
2548 - fix lsm leak if mds_create_objects() fails (4801)
2549 - limit debug_daemon file size, always print CERROR messages (4789)
2550 - use transno after validating reply (3892)
2551 - process timed out requests if import state changes (3754)
2552 - update mtime on OST during writes, return in glimpse (4829)
2553 - add mkfsoptions to LDAP (4679)
2554 - use ->max_readahead method instead of zapping global ra (5039)
2555 - don't interrupt __l_wait_event() during strace
2557 - add software watchdogs to catch hung threads quickly (4941)
2558 - make lustrefs init script start after nfs is mounted
2559 - fix CWARN/ERROR duplication (4930)
2560 - return async write errors to application if possible (2248)
2561 - add /proc/sys/portal/memused (bytes allocated by PORTALS_ALLOC)
2562 - print NAL number in %x format (4645)
2563 - update barely-supported suse-2.4.21-171 series (4842)
2564 - support for sles 9 %post scripts
2565 - support for building 2.6 kernel-source packages
2566 - support for sles km_* packages
2568 2004-10-07 Cluster File Systems, Inc. <info@clusterfs.com>
2571 - ignore -ENOENT errors in osc_destroy (3639)
2572 - notify osc create thread that OSC is being cleaned up (4600)
2573 - add nettype argument for llmount in #5d in conf-sanity.sh (3936)
2574 - reconstruct ost_handle() like mds_handle() (4657)
2575 - create a new thread to do import eviction to avoid deadlock (3969)
2576 - let lconf resolve symlinked-to devices (4629)
2577 - don't unlink "objects" from directory with default EA (4554)
2578 - hold socknal file ref over connect in case target is down (4394)
2579 - allow more than 32000 subdirectories in a single directory (3244)
2580 - fix blocks count for O_DIRECT writes (3751)
2581 - OST returns ENOSPC from object create when no space left (4539)
2582 - don't send truncate RPC if file size isn't changing (4410)
2583 - limit OSC precreate to 1/2 of value OST considers bogus (4778)
2584 - bind to privileged port in socknal and tcpnal (3689)
2586 - rate limit CERROR/CWARN console message to avoid overload (4519)
2587 - GETFILEINFO dir ioctl returns LOV EA + MDS stat in 1 call (3327)
2588 - basic mmap support (3918)
2589 - kernel patch series update from b1_4 (4711)
2591 2004-09-16 Cluster File Systems, Inc. <info@clusterfs.com>
2594 - avoid crash during MDS cleanup with OST shut down (2775)
2595 - fix loi_list_lock/oig_lock inversion on interrupted IO (4136)
2596 - don't use bad inodes on the MDS (3744)
2597 - dynamic object preallocation to improve recovery speed (4236)
2598 - don't hold spinlock over lock dumping or change debug flags (4401)
2599 - don't zero obd_dev when it is force cleaned (3651)
2600 - print grants to console if they go negative (4431)
2601 - "lctl deactivate" will stop automatic recovery attempts (3406)
2602 - look for existing locks in ldlm_handle_enqueue() (3764)
2603 - don't resolve lock handle twice in recovery avoiding race (4401)
2604 - revalidate should check working dir is a directory (4134)
2606 - don't always mark "slow" obdfilter messages as errors (4418)
2608 2004-08-24 Cluster File Systems, Inc. <info@clusterfs.com>
2611 - don't close LustreDB during write_conf until it is done (3860)
2612 - fix typo in lconf for_each_profile (3821)
2613 - allow dumping logs from multiple threads at one time (3820)
2614 - don't allow multiple threads in OSC recovery (3812)
2615 - fix debug_size parameters (3864)
2616 - fix mds_postrecov to initialize import for llog ctxt (3121)
2617 - replace config semaphore with spinlock (3306)
2618 - be sure to send a reply for a CANCEL rpc with bad export (3863)
2619 - don't allow enqueue to complete on a destroyed export (3822)
2620 - down write_lock before checking llog header bitmap (3825)
2621 - recover from lock replay timeout (3764)
2622 - up llog sem before sending rpc (3652)
2623 - reduce ns lock hold times when setting kms (3267)
2624 - change a dlm LBUG to LASSERTF, to maybe learn something (4228)
2625 - fix NULL deref and obd_dev leak on setup error (3312)
2626 - replace some LBUG about llog ops with error handling (3841)
2627 - don't match INVALID dentries from d_lookup and spin (3784)
2628 - hold dcache_lock while marking dentries INVALID and hashing (4255)
2629 - fix invalid assertion in ptlrpc_set_wait (3880)
2631 - add libwrap support for the TCP acceptor (3996)
2632 - add /proc/sys/portals/routes for non-root route listing (3994)
2633 - allow setting MDS UUID in .xml (2580)
2634 - print the stack of a process that LBUGs (4228)
2636 2004-07-14 Cluster File Systems, Inc. <info@clusterfs.com>
2639 - don't cleanup request in ll_file_open() on failed MDS open (3430)
2640 - make sure to unset replay flag from failed open requests (3440)
2641 - if default stripe count is 0, use OST count for inode size (3636)
2642 - update parent mtime/ctime on client for create/unlink (2611)
2643 - drop dentry ref in ext3_add_link from open_connect_dentry (3266)
2644 - free recovery state on server during a forced cleanup (3571)
2645 - unregister_reply for resent reqs (3063)
2646 - loop back devices mounting and status check on 2.6 (3563)
2647 - fix resource-creation race that can provoke i_size == 0 (3513)
2648 - don't try to use bad inodes returned from MDS/OST fs lookup (3688)
2649 - more debugging for page-accounting assertion (3746)
2650 - return -ENOENT instead of asserting if ost getattr+unlink race (3558)
2651 - avoid deadlock after precreation failure (3758)
2652 - fix race and lock order deadlock in orphan handling (3450, 3750)
2653 - add validity checks when grabbing inodes from l_ast_data (3599)
2655 - add /proc/.../recovery_status to obdfilter (3428)
2656 - lightweight CDEBUG infrastructure, debug daemon (3668)
2657 - change default OSC RPC parameters to be better on small clusters
2658 - turn off OST read cache for files smaller than 32MB
2659 - install man pages and include them in rpms (3100)
2660 - add new init script for (un)mounting lustre filesystems (2593)
2661 - run chkconfig in %post for init scripts (3701)
2662 - drop scimac NAL (unmaintained)
2664 2004-06-17 Cluster File Systems, Inc. <info@clusterfs.com>
2667 - clean kiobufs before and after use (3485)
2668 - strip trailing '/'s before comparing paths with /proc/mounts (3486)
2669 - remove assertions to work around "in-flight rpcs" recovery bug (3063)
2670 - change init script to fail more clearly if not run as root (1528)
2671 - allow clients to reconnect during replay (1742)
2672 - fix ns_lock/i_sem lock ordering deadlock for kms update (3477)
2673 - don't do DNS lookups on NIDs too small for IP addresses (3442)
2674 - re-awaken ptlrpcd if new requests arrive during check_set (3554)
2675 - fix cond_resched (3554)
2676 - only evict unfinished clients after recovery (3515)
2677 - allow bulk resend, prevent data loss (3570)
2678 - dynamic ptlrpc request buffer allocation (2102)
2679 - don't allow unlinking open directory if it isn't empty (2904)
2680 - set MDS/OST threads to umask 0 to not clobber client modes (3359)
2681 - remove extraneous obd dereference causing LASSERT failure (3334)
2682 - don't use get_cycles() when creating temp. files on the mds (3156)
2683 - hold i_sem when setting i_size in ll_extent_lock() (3564)
2684 - handle EEXIST for set-stripe, set proper directory name (3336)
2686 - servers can dump a log evicting a client - lustre.dump_on_timeout=1
2687 - fix ksocknal_fmb_callback() error messages (2918)
2689 2004-05-27 Cluster File Systems, Inc. <info@clusterfs.com>
2692 - don't copy lvb into (possibly NULL) reply on error (2983)
2693 - don't deref dentry after dput, don't free lvb on error (2922)
2694 - use the kms to determine writeback rpc length (2947)
2695 - increment oti_logcookies when osc is inactive (2948)
2696 - update client's i_blocks count via lvb messages (2543)
2697 - handle intent open/close of special files properly (1557)
2698 - mount MDS with errors=remount-ro, like obdfilter (2009)
2699 - initialize lock handle to avoid ASSERT on error cleanup (3057)
2700 - don't use cancelling-locks' kms values (2947)
2701 - use highest lock extent for kms, not last one (2925)
2702 - don't dereference ERR_PTR() dentry in error handling path (3107)
2703 - fix thread race in portals_debug_dumplog() (3122)
2704 - create lprocfs device entries at setup instead of at attach (1519)
2705 - common AST error handler, don't evict client on completion race (3145)
2706 - zero nameidata in detach_mnt in 2.6 (3118)
2707 - verify d_inode after revalidate_special is valid in 2.6 (3116)
2708 - use lustre_put_super() to handle zconf unmounts in 2.6 (3064)
2709 - initialize RPC timeout timer earlier for 2.6 (3219)
2710 - don't dereference NULL reply buffer if mdc_close was never sent (2410)
2711 - print nal/nid for unknown nid (3258)
2712 - additional checks for oscc recovery before doing precreate (3284)
2713 - fix ll_extent_lock() error return code for 64-bit systems (3043)
2714 - don't crash in mdc_close for bad permissions on open (3285)
2715 - zero i_rdev for non-device files (3147)
2716 - clear page->private before handing to FS, better assertion (3119)
2717 - tune the read pipeline (3236)
2718 - fix incorrect decref of invalidated dentry (2350)
2719 - provide read-ahead stats and refine rpc in flight stats (3328)
2720 - don't hold journal transaction open across create RPC (3313)
2721 - update atime on MDS at close time (3265)
2722 - close LDAP connection when recovering to avoid server load (3315)
2723 - update iopen-2.6 patch with fixes from 2399,2517,2904 (3301)
2724 - don't leak open file on MDS after open resend (3325)
2725 - serialize filter_precreate and filter_destroy_precreated (3329)
2726 - loop device shouldn't call sync_dev() for nul device (3092)
2727 - clear page cache after eviction (2766)
2728 - resynchronize MDS->OST in background (2824)
2729 - refuse to mount the same filesystem twice on same mountpoint (3394)
2730 - allow llmount to create routes for mounting behind routers (3320)
2731 - push lock cancellation to blocking thread for glimpse ASTs (3409)
2732 - don't call osc_set_data_with_check() for TEST_LOCK matches (3159)
2733 - fix rare problem with rename on htree directories (3417)
2735 - allow default OST striping configuration per directory (1414)
2736 - fix compilation for qswnal for 2.6 kernels (3125)
2737 - increase maximum number of MDS request buffers for large systems
2738 - change liblustreapi to be useful for external progs like lfsck (3098)
2739 - increase local configuration timeout for slow disks (3353)
2740 - allow configuring ldlm AST timeout - lustre.ldlm_timeout=<seconds>
2742 2004-03-22 Cluster File Systems, Inc. <info@clusterfs.com>
2745 - fixes for glimpse AST timeouts / incorrectly 0-sized files (2818)
2746 - don't overwrite extent policy data in reply if lock was blocked (2901)
2747 - drop filter export grants atomically with removal from device (2663)
2748 - del obd_self_export from work_list in class_disconnect_exports (2908)
2749 - don't LBUG if MDS recovery times out during orphan cleanup (2530)
2750 - swab reply message in mdc_close, other PPC fixes (2464)
2751 - fix destroying of named logs (2325)
2752 - overwrite old logs when running lconf --write_conf (2264)
2753 - bump LLOG_CHUNKSIZE to 8k to allow for larger clusters (2306)
2754 - fix race in target_handle_connect (2898)
2755 - mds_reint_create() should take same inode create lock (2926)
2756 - correct journal credits calculated for CANCEL_UNLINK_LOG (2931)
2757 - don't close files for self_export to avoid uninitialized obd (2936)
2758 - allow MDS with the same name as client node (2939)
2759 - hold dentry reference for closed log files for unlink (2325)
2760 - reserve space for all logs during transactions (2059)
2761 - don't evict page beyond end of stripe extent (2925)
2762 - don't oops on a deleted current working directory (2399)
2763 - handle hard links to targets without a parent properly (2517)
2764 - don't dereference NULL lock when racing during eviction (2867)
2765 - don't grow lock extents when lots of conflicting locks (2919)
2767 2004-03-04 Cluster File Systems, Inc. <info@clusterfs.com>
2770 - account for cache space usage on clients to avoid data loss (974)
2771 - lfsck support in lustre kernel code (2349)
2772 - reduce journal credits needed for BRW writes (2370)
2773 - orphan handling to avoid losing space on client/server crashes
2774 - ptlrpcd can be blocked, stopping ALL progress (2477)
2775 - use lock value blocks to assist in proper KMS, faster stat (1021)
2776 - takes i_sem instead of DLM locks internally on obdfilter (2720)
2777 - recovery for initial connections (2355)
2778 - fixes for mds_cleanup_orphans (1934)
2779 - abort_recovery crashes MDS in b_eq (mds_unlink_orphan) (2584)
2780 - block all file creations until orphan recovery completes (1901)
2781 - client remove rq_connection from request struct (2423)
2782 - conf-sanity test_5, proper cleanup in umount log not availale (2640)
2783 - recovery timer race (2670)
2784 - mdc_close recovey bug (2532)
2785 - ptlrpc cleanup bug (2710)
2786 - mds timeout on local locks (2588)
2787 - namespace lock held during RPCs (2431)
2788 - handle interrupted sync write properly (2503)
2789 - don't try to handle a message that hasn't been replied to (2699)
2790 - client assert failure during cleanup after abort recovery (2701)
2791 - leak mdc device after failed mount (2712)
2792 - ptlrpc_check_set allows timedout requests to complete (2714)
2793 - wait for inflight reqs when ptlrpcd finishes (2710)
2794 - make sure unregistered services are removed from the srv_list
2795 - reset bulk XID's when resending them (caught by 1138 test)
2796 - unregister_bulk after timeout
2797 - fix lconf error (2694)
2798 - handle write after unfinished setstripe, stripe-only getstripe (2388)
2799 - readahead locks pages, leaves pending causing memory pressure (2673)
2800 - increase OST request buffers to 4096 on large machines (2729)
2801 - fix up permission of existing directories in simple_mkdir (2661)
2802 - init deleted item, add assertions ptlrpc_abort_inflight() (2725)
2803 - don't assign transno to errored transactions (2742)
2804 - don't delete objects on OST if given a bogus objid from MDS (2751)
2805 - handle large client PAGE_SIZE readdir on small PAGE_SIZE MDS (2777)
2806 - if rq_no_resend, then timeout request after recovery (2432)
2807 - fix MDS llog_logid record size, 64-bit array alignment (2733)
2808 - don't call usermode_helper from ptlrpcd, DEFAULT upcall (2773)
2809 - put magic in mount.lustre data, check for bad/NULL mount data (2529)
2810 - MDS recovery shouldn't delete objects that it has given out (2730)
2811 - if enqueue arrives after completion, don't clobber LVB (2819)
2812 - don't unlock pages twice when trigger_group_io returns error (2814)
2813 - don't deref NULL rq_repmsg if ldlm_handle_enqueue failed (2822)
2814 - don't write pages to disk if there was an error (1450)
2815 - don't ping imports that have recovery disabled (2676)
2816 - take buffered bytes into account when balancing socknal conn (2817)
2817 - hold a DLM lock over readdir always, use truncate_inode_pages (2706)
2818 - reconnect unlink llog connection after MDS reconnects to OST (2816)
2819 - remove little-endian swabbing of llog records (1987)
2820 - set/limit i_blksize to LL_MAX_BLKSIZE on client (2884)
2821 - retry reposting request buffers if they fail (1191)
2822 - grow extent at grant time to avoid granting a revoked lock (2809)
2823 - lock revoke doesn't evict page if covered by a second lock (2765)
2824 - disable VM readahead to avoid reading outside lock extents (2805)
2826 - return LL_SUPER_MAGIC from statfs for the filesystem type (1972)
2827 - updated kernel patches for hp-2.4.20 kernel (2681)
2829 2004-02-07 Cluster File Systems, Inc. <info@clusterfs.com>
2832 - fix truncated write corruption (2366)
2833 - fix for failed assertion in iopen_connect_dentry (1792,2517)
2835 - don't flag the ptlrpcd thread with PF_MEMALLOC (2636)
2836 - ensure len(uuid) < 37 in lmc (1171)
2837 - fix ia64 OOPS in llog_test (2255)
2838 - zero end of page at obdfilter for partial page writes (2648)
2839 - don't leave stale dentries around after renames (bug 2428)
2840 - fix timeouts when evicting a client with a single lock held (2642)
2841 - set deadline for the initial HELLO message to drain (2634)
2842 - print out dotted-quad IP addresses in the socknal (2302)
2844 - additional debugging for MDS client eviction problem (2443)
2845 - fix mkfsoptions support for osts (2603, 2604)
2847 2004-01-27 Cluster File Systems, Inc. <info@clusterfs.com>
2850 - add series for the vanilla 2.6.0 kernel
2851 - add series for the vanilla 2.4.24 kernel
2852 - add series for a cray x86/64 UL kernel drop
2853 - fix xattr patches for the vanilla 2.4.19 series
2855 - generate true UUIDs in lmc (1171)
2856 - have portals stack dumping break in UML (2466)
2857 - avoid bad dchild deref; avoid inum lock w/o creation (2362)
2858 - allocate with _NOFS in ldlm to avoid deadlock (1933)
2859 - wake callback waiting threads on client eviction (2460)
2860 - Add --ptldebug and --subsystem to lmc (1719)
2861 - update assertion to allow safe interrupt allocation
2862 - set rq_no_resend for cancel requests (2432)
2863 - recalculate ptlrpcd timeout after resend (2494)
2864 - call vfs_rmdir when removing pending directories (2368)
2865 - fix renaming a file to itself (2429)
2866 - lmc creates a default one-stripe lov (2454)
2867 - expand procfs space to handle large clusters (2326)
2868 - increase UML stack to avoid overflow
2869 - update lconf's list of debug and subsystem masks
2870 - fix lfs find --obd (2510)
2871 - /proc tunable for disabling filter read caching (2591)
2872 - stop rpm packages from altering slapd.conf (2301)
2873 - disable nagle in the socknal under 0conf (2578)
2874 - choose mds inode size based on stripe count (2572)
2875 - fix kernel-source rpm problems (2516)
2877 - add --disable-doc to avoid pdf generation (2421)
2878 - update documentation, tests, type-os, comments
2879 - avoid format warnings on ia64
2880 - remove the TOE NAL
2881 - tiny code cleanups by removing unused fields
2883 2004-01-07 Cluster File Systems, Inc. <info@clusterfs.com>
2886 - fix obvious semaphore misuse in as-yet-unused setattr path (2348)
2887 - remove the most blatant lies from BUILDING file (2371)
2888 - change default debug level to reasonable production setting
2889 - reduce client side cache size to reduce cache flush time
2890 - reduce max RPCs in flight to avoid unnecessary file fragmentation
2891 - make TCP zerocopy and pinger support enabled by default (2476)
2892 - sync writes completed after process exits caused crashes (2319)
2893 - maintain correct mount count on the MDS (2356)
2894 - backout 1557, because 2316 wasn't really fixed
2895 - better file I/O statistics gathering in /proc
2896 - don't take unnecessary, deadlock-inducing bug in readpage (2383)
2897 - another kernel patch to fix zero-copy TCP function export
2898 - don't take duplicate lock when processing re-sent getattr (2420)
2899 - lctl uses obd_self_export instead of creating new conn (2353)
2900 - MDS/OST recovery case which requires object creation asserted (2425)
2901 - move lfs from /usr/sbin to /usr/bin in packages
2902 - fix race between mds_client_add and mds_client_free (2417)
2903 - use kmalloc instead of slabs in portals (2430)
2904 - don't create duplicate records when a failover MDS is present (2442)
2905 - remove unnecessary mount age check (2332)
2906 - don't remove directory inodes from locks prematurely (2451)
2907 - don't break if MDS service name is the same as hostname (2103)
2908 - fix races in client write RPC generation when cache full (2482)
2910 2003-12-13 Cluster File Systems, Inc. <info@clusterfs.com>
2913 - remove now-unused request->rq_obd (278)
2914 - if an allocation fails, print out how much memory we've used (1933)
2915 - use PORTAL_SLAB_ALLOC for structures, to get GFP_MEMALLOC (1933)
2916 - add the "configurable stack size" patch to most series files (1256)
2917 - ability to write large log records, for 100+ OST configs (2306)
2918 - fix NULL deref when filter_prep fails (2314)
2919 - fix operator precedence error in filter_sync
2920 - dynamic allocation of socknal TX descriptors (2315)
2921 - fix a missed case in the GFP_MEMALLOC patch, can cause deadlock (2310)
2922 - fix gcc 2.96 compilation problem in xattr kernel patch (2294)
2923 - ensure that CWARN messages in Portals always get to the syslog
2924 - __init/__exit are not for prototype decls (ldlm_init/exit)
2925 - x86-64 compile warning fixes
2926 - fix gateway LMC keyword conflict (2318)
2927 - fix MDS lock inversions in getattr/reint paths (1844)
2928 - fix a rare lock re-ordering bug, which caused deadlock (2322)
2929 - fix i_sem/journal inversion in fsfilt_ext3_write_record (2306)
2930 - DLM race condition prevented some lock evictions (2328)
2931 - ENOMEM detection and retry on socknal sends (2230)
2932 - use GFP_NOFS throughout Lustre, to combat ENOMEM (2230)
2933 - move osc_rpcd into ptlrpc, for use in MDC and others (2329)
2934 - protect MDS inode fsdata with stronger locking; fixes assertion (2313)
2935 - better error messages when a client is rejected during recovery (1505)
2936 - avoid cancelling locks which were never granted, after failure (2330)
2937 - fix i_sem/journal inversion in mds_client_add (2333)
2938 - fix truncate/getattr lock cycle deadlock (2334)
2939 - use rpcd to send close; allows resend after timeout, avoid leak (1897)
2940 - fix two rare exit paths which could leak an l_lock() ref (2321)
2941 - fencepost error in MDS/OST orphan recovery (2226)
2942 - make log record alignment 8 bytes (1988)
2943 - lstripe now fails when requested offset > ost_count (2237)
2944 - ensure that all kernel series have a complete list.h (1607)
2945 - fix crashes in special-file operations (2316)
2946 - lctl create/brw OID mismatch, caused by obsolete filter loop (2339)
2948 - allow configurable automake binary, for testing new versions
2949 - small update to the lfs documentation
2951 2003-12-03 Cluster File Systems, Inc. <info@clusterfs.com>
2953 * fix negative export reference count in fsfilt_sync (2312)
2955 2003-12-01 Cluster File Systems, Inc. <info@clusterfs.com>
2956 * release candidate 0.9.1
2958 - orphans are moved into the PENDING directory for possible recovery
2959 - replayed opens now open by fid for orphan/rename safety (1042)
2960 - last close of an orphan inode generates a transno (683)
2961 - chdir() and mount() now pin the directory entry (1020)
2962 - avoid CERROR in normal ll_setattr_raw() error case (1500)
2963 - discard very old requests without processing them (1502)
2964 - remove some common, well-understood CERRORs (1505)
2965 - require O_DIRECT I/O to be page-sized to workaround IA64 crash (1609)
2966 - clear "grant" flags in OST replies until OST grant code lands (1644)
2967 - fix read performance by not clobbering i_blksize on client (1598)
2968 - fix __ldlm_handle2lock oops by not dereferencing lock after PUT (1625)
2969 - make LRU size a /proc tunable, clears locks when reduced (707)
2970 - fix some lprocfs rot that prevented ptlbd from loading (1732)
2971 - server locks take references on exports now (1558)
2972 - build fixes for 2.4.20-rh trees (1663)
2973 - return an error from lov_create if all OSCs are inactive (1751)
2974 - fix import levels when a reconnect happens without a timeout (1597)
2975 - exit early from mds_open if we get a lookup error (1749)
2976 - partial page read at EOF wouldn't wait for disk before sending (1642)
2977 - avoid NULL deref in obdfilter when reading page past EOF (1592)
2978 - avoid LASSERT in ll_intent_lock if server failed very early (1090)
2979 - fix LBUG in ll_it_open_error with rc = -2 (1861)
2980 - write/truncate lock inversion (1639)
2981 - Don't auto-load obdclass, portals modules during cleanup (1495)
2982 - fix timestamps from jumping to "now" (1763)
2983 - extra journal assertions (1648)
2984 - add an extra multiunlink test (1771)
2985 - fix read_record/write_record API (1776)
2986 - fix leak of offset_extent, possible incorrect i_size later (1772)
2987 - fix lasserts in mis-matched transnos during open-unlink testing (1541)
2988 - Debugging for the kqswnal_get_idle_tx problems (1820)
2989 - Allow recovery to be attempted multiple times (1536)
2990 - Write out MDS last_rcvd file after it is first created (1600)
2991 - Fix tx_descriptor leak in failed transmit situations (1827)
2992 - ext3 journaling fixes for assertion failure after IO error (1871)
2993 - class_export_put() on freed export after completion AST error (1896)
2994 - Fix revalidate looping in VFS (1322)
2995 - Don't access a freed export during MDS_REINT timeout (1521)
2996 - Add open-unlink recovery support on the MDS (1673,1764)
2997 - Return an error if no MDS data was read from last_rcvd (1946)
2998 - Fix for lookup "." or ".." crash on error (1932,1931,1935)
2999 - Don't setup a disk device that doesn't match exported UUID (317)
3000 - Reduce bulk RPC timeout to avoid cascading client/OST failures (1845)
3001 - avoid committing NULL handle in force close
3002 - local.sh is now a one-stripe LOV configuration
3003 - POSIX utime.4 -EPERM on FIFO not owned by user (56)
3004 - fix ext3 htree duplicate directory entry corruption (1516)
3005 - POSIX creat.13, fstat.1, open.18, stat.3 new file atime/mtime (2020)
3006 - update to new LOV EA format (2097)
3007 - interoperability for different PAGE_SIZE/wordsize (686,1821,1343,2042)
3009 2003-06-15 Phil Schwan <phil@clusterfs.com>
3012 - imports and exports cleanup too early, need refcounts (349, 879, 1045)
3013 - per-import/export recovery handling (958, 931, 959)
3014 - multiple last-rcvd slots, for serving multiple FSes (949)
3015 - connections are again shared between multiple imp/exports (963, 964)
3016 - "umount -f" would hang if any requests needed to be sent (393, 978)
3017 - avoid pinning large req buffer by copying for queued messages (989)
3018 - add "uuid" to "lctl device" command to help upcalls (991)
3019 - "open" RPCs with transnos would confuse recovery counters (1037)
3020 - do proper endian conversion of all wire messages (288, 340, 891)
3021 - remove OST bulk get LBUGs, fix ost_brw_write cleanup (1126)
3022 - call waiting locks callback from LDLM recovery thread (1127, 1151)
3023 - fix ptlrpc_connection leak in target_handle_connect (1174)
3024 - fix import refcounting bug in OST and MDS cleanup (1134)
3025 - if an invalid-at-open-time OSC returned before close(), LBUG (1150)
3026 - fix very unlikely obd_types race condition (501)
3027 - remove osc_open hack for echo_client (1187)
3028 - we leaked exports/dlmimps for forcibly disconnected clients (1143)
3029 - a failure in read_inode2 leads to deadlock (1139)
3030 - cancel ack-locks as soon as transaction is committed (1072)
3031 - fix major leaks and crashes in the bulk I/O path (937, 1057)
3032 - make sure to commitrw after any preprw to avoid deadlock (1162)
3033 - failing to execute a file in a lustre FS would lock inode (1203)
3034 - small DEBUG_REQ fix to avoid dereferencing a NULL (1227)
3035 - don't ASSERT while cleaning up an incompletely-setup obd (1248)
3036 - obd_uuid2tgt would walk off the end of the list (1255)
3037 - on IA64 the osc would give portals incorrect bulk size (1258)
3038 - fix debug daemon ioctl interface; allows daemon on ia64 (1274)
3039 - fix lock inversion caused by new llite matching code (1282)
3040 - limit the number of dirty pages on a client to 10MB (1286)
3041 - timed out locks were not being corrected cancelled (1289)
3042 - fix O_DIRECT above 4GB on IA-32 (1292)
3043 * major user-visible changes
3044 - fail out/fail over policy now controlled by the upcall (993)
3046 - add OBD_PING to check server availability and failure (954)
3047 - lustre messages are now sent in sending host order (288, 340, 891)
3048 - add eadatalen to MDS getattr reply (340)
3049 - OST read replies may contain second buffer, with per-page status (593)
3051 2003-03-11 Phil Schwan <phil@clusterfs.com>
3054 - LDLM_DEBUG macro fix, for gcc 3.2 (850)
3055 - failed open()s could cause deadlock; fixed (867, 869)
3056 - stop cancelling OST locks when files are closed (481)
3057 - overlapping XID spaces caused network corruption (851, 853)
3058 - fix unsafe fsfilt counter arithmetic; change to atomic_t
3059 - setattr_raw added, to do single-RPC, server-side setattrs
3060 - lmc/lconf syntax change for OST UUIDs
3061 - fix crashy race condition between ptlrpc_free_req and osc_close
3062 - don't use request in mdc_enqueue if we hit a timeout (889)
3063 - don't set the inode i_size for regular files from the MDS (896)
3064 - handle out of order completion AST (842)
3065 - don't LBUG if a lock request times out after receiving AST (913)
3066 - avoid d_rehash race in ll_find_alias by rehashing inside dcache_lock
3067 - if a bad lock AST arrives, send an error instead of dropping entirely
3068 - return 0 from revalidate2 if ll_intent_lock returns -EINTR (912)
3069 - fix leak in bulk IO when only partially completed (899, 900, 926)
3070 - fix O_DIRECT for ia64 (55)
3071 - (almost) eliminate Lustre-kernel-thread effects on load average (722)
3072 - C-z after timeout could hang a process forever; fixed (977)
3074 - client-side I/O cache (678, 924, 929, 941, 970)
3076 - READPAGE and SETATTRs which don't take server-side locks get
3079 2003-02-11 Phil Schwan <phil@clusterfs.com>
3082 - Fix ldlm_lock_match on the MDS to avoid matching remote locks (592)
3083 - Fix fsfilt_extN_readpage() to read a full page of directory
3084 entries, or fake the remainder if PAGE_SIZE != blocksize (500)
3085 - Avoid extra mdc_getattr() in ll_intent_lock when possible (534, 604)
3086 - Fix imbalanced LOV object allocation and out-of-bound access (469)
3087 - Most intent operations were removed, in favour of a new RPC mode
3088 that does a single RPC to the server and bypasses most of the VFS
3089 - All LDLM resource ID arrays were removed in favour of ldlm_res_id
3090 - Aggressively cancel local locks on DLM servers
3091 - mds_reint_unlink sends EA to the client if it's the last nlink.
3092 client uses that EA to unlink OST objects.
3093 - mds_reint_{rename,unlink,link} were rewritten to take ordered locks
3094 - recursive symlinks were fixed (439)
3095 - fixed NULL deref in DEBUG_REQ
3096 - filter_update_lastobjid no longer calls sync, which annoyed extN
3097 - fixed multi-client small-writes to a single file problem (445)
3098 - fixed mtime updates during file writes (607)
3099 - fixed vector writes on obdfilter causing problems when ENOSPC (670)
3100 - fixed bug in obd_brw_read/write() (under guise of testing 367)
3101 - fixed Linux OST size reporting problem (444, 656)
3102 - OST now updates object mtime with writes or setattr (607, 619)
3103 - client verifies file size before zeroing page past EOF (445)
3104 - OST now writes last allocated objid to disk with allocation (108)
3105 - LOV on echo now works (409)
3107 - mds_reint_unlink sends a new buffer, with the EA included. this
3108 buffer is only valid if body->valid & OBD_MD_FLEASIZE, which is only
3109 set if a regular file was being unlinked, and it was the last link
3110 - use PtlGet from the target for bulk writes (315)
3111 - OST now updates object mtime with writes or setattr (607, 619)
3112 - LDLM now has a grant-time callback to revalidate locked items, if
3114 - Many MDS operations were reorganized to combat race conditions
3116 - Merge b_intel branch (updated lprocfs code) - now at /proc/fs/lustre
3117 - configure check to avoid gcc version 2.96 20000731-2.96-98) (606)
3119 2003-01-06 Andreas Dilger <adilger@clusterfs.com>
3122 - Fully reactivate OST imports after reconnection (512, others)
3123 - Make sure client sees our -ENOTCONN from mds_handle (513 - partial)
3124 - More graceful error handling for truncating on dead OST (515)
3125 - Don't error out unless we're actually accessing dead stripes (474)
3126 - Fix garbage sizes when stripes are missing (410)
3127 - LRU counters were broken, causing constant lock purge (433, 432)
3128 - garbage on read from stripes with failed OSTs (441)
3129 - mark OSCs as active before reconnecting during recovery (438)
3130 - lov_enqueue and lov_cancel need to handle inactive OSTs (403)
3131 - lfind did not preserve OST order in output (443)
3132 - symlinks cause hung clients, incorrect data (439)
3133 - stop dereferencing request after dropping refcount (457)
3134 - don't LASSERT(spin_is_locked) on non-SMP (455)
3135 - fixes for many rename() bugs
3136 - fstat didn't correctly synchronize attributes (399)
3137 - server must handle lock cancellation during blocking AST prep (487)
3138 - bulk descriptors were free()d too soon (511)
3139 - fix paths in lconf, which would load incorrect modules (451, 507)
3140 - fix confusing lconf 'host not found' error message (386)
3141 - fix lock order deadlock on OST (O/R i_sem before journal ops, 478)
3142 - fix race condition in mdc_blocking_ast() for inode access (526)
3143 - fix lov_unpackmd() unpacking wrong number of stripes (537)
3144 - fix lov_set_osc_active() marking wrong OSC inactive (440)
3145 - fix bad lstripe lov_unpackmd() assertion (fix layering too) (527)
3146 - fix multiple writes of stripe MD to MDS (358, maybe 519)
3147 - fix lstripe in several ways (kernel side) (527)
3148 - fix request leak in ldlm_cli_enqueue (262)
3149 - incorrect OSC was marked inactive after OST failure
3150 - call mds_fs_cleanup before unmounting filesystem (524)
3151 - fix races between taking ns_lock and ldlm_lock_change_resource
3152 - fix races updating LOV export open file list
3153 - fix lov_enqueue error path, avoid decref-ing bad lock handle
3154 - fix recovery NULL deref in ldlm_cli_cancel_unused
3155 - fix some DLM races by using new hash table for lock handles (419)
3156 - permit the client to specify desired inodes, at replay
3157 - duplicate requests when we queue them for replay reintegration
3158 - fix last_rcvd offset calculation
3159 - sync after each recovered transaction, so we always make progress
3160 - never, not always, ERESTART requests without transnos
3161 - store the lov_desc in the MDS, so we don't depend on getlovinfo to
3163 - skip replay if the MDS says that the client is already connected
3164 - don't check for a recovery-enabled export to match lctl's UUID
3165 - don't INC_USE_COUNT for phantom exports
3166 - don't crash when cleaning up phantom exports (567)
3167 - don't double-finish or set replay data for errored mdc_open requests
3168 - abort requests when they time out, so we don't get old replies
3169 - send/receive replies for AST messages again
3170 - if the client says that it doesn't have the lock, cancel it on the
3172 - if we timeout during I/O, don't try to cancel an in-use lock; instead
3173 mark it as destroyed, it will all work out when decref is called
3174 - fix module use counts (22, 581)
3176 - ASTs now expect a reply (server cancels lock on error reply)
3178 2002-12-02 Andreas Dilger <adilger@clusterfs.com>
3181 - fix many simultaneous client startup (392)
3182 - fix dentry->d_it clobbering
3183 - credentials weren't being shipped for readdir/getattr operations
3184 - remove invalid assertions triggered during some concurrent MD
3186 - proper Lustre versions added (336, 389)
3187 - fix memory leak for create error case (398)
3188 - fix LOV locking bug that would get cli/srv out of sync
3189 - fix echo client over LOV (409)
3190 - fix dbench 2, extN refcount problem (170, 258, 356, 418)
3191 - fix double-O_EXCL intent crash (424)
3192 - avoid sending multiple lock CANCELs (352)
3194 - MDS can do multi-client recovery (modulo bugs in new code)
3196 - many updates, edits, cleanups
3198 2002-11-18 Phil Schwan <phil@clusterfs.com>
3201 - fix null d_it dereference (346)
3202 - fix full OST/dbench hang (333)
3203 - fix permission problem with file removal (286)
3204 - fix removal of OSCs from LOV when they fail
3205 - fix NULL deref during bulk timeout (214)
3206 - fix problems related to multiple filesystems on one MDS (241)
3207 - fixed serious subtle metadata locking bugs
3208 - free locks on clients when inodes are removed due to memory
3210 - fix inode pointer in lock data (285)
3211 - partial support for multiple MDS on a single host (241)
3212 - data locks weren't cancelled at clear_inode time (290, 311)
3213 - intent locks could lead to unbounded lock growth (205)
3214 - added a maximum lock count, an LRU list, and a flusher
3215 - fix multiple rename (365)
3216 - properly abstracted the echo client
3217 - OSC locked 1 byte too many; fixed
3218 - rewrote brw callback code:
3219 - fixed recovery bugs related to LOVs (306)
3220 - fixed too-many-pages-in-one-write crash (191)
3221 - fixed (again) crash in sync_io_timeout (214)
3222 - probably fixed callback-related race (385)
3224 - Add capability to MDS protocol
3225 - LDLM cancellations and callbacks on different portals
3227 2002-10-28 Andreas Dilger <adilger@clusterfs.com>
3230 - limit client IOV size to PTL_MD_MAX_IOV (611336, 191)
3231 - defer open object destruction to close time (601981, 138)
3232 - open/close OST file handle in obdo (OBD_MD_FLHANDLE) (601981, 138)
3233 - move LDLM_ENQUEUE/CONVERT back to MDS portal (625069)
3234 - abstract ll_lookup2, fix ll_revalidate2 to use abstraction (256)
3235 - don't call obd_setattr in ll_file_release for destroyed objects
3236 * protocol change to lustre_msg: move |version| and add |flags|
3237 * protocol change to osc_punch: "start" in "o_size", "end" in "o_blocks"
3238 * lock replay: for LDLM_FL_REPLAY trust client to do right thing
3239 * added replay of create, unlink, link and rename operations during
3240 MDS failover; recovery should be much more robust now
3241 * remove failed OSCs from LOVs (only lov_create uses this so far)
3242 * the lustre-HOWTO was brought (more) up to date (582544)
3244 2002-10-23 Phil Schwan <phil@clusterfs.com>
3247 - in-use dentries weren't being reused properly (617851)
3248 - prevent multiple LDLM setup (599178)
3249 - fix LOV size calculations for truncate (617853)
3250 - fix client handling of MDS intent errors (POSIX)
3251 - fix permission bug in lovstripe.c test (624321)
3252 - fix MDS thread deadlock - move LDLM handler to DLM portal (625069)
3253 - truncate past end of file could corrupt data
3254 - proper cleanup after timeouts, crashes, etc (592524, 550815)
3255 - a race in recovery could return ETIMEDOUT to apps (623947)
3256 - building outside the source directory was fixed
3257 * the lustre-HOWTO was brought (more) up to date (582544)
3258 * major progress was made on recovery functionality
3260 2002-10-10 Phil Schwan <phil@clusterfs.com>
3263 - recovery deadlock fix
3264 - rm -rf causes LBUG fix (617817)
3265 - file open by multiple tasks fix (618962)
3266 - directory permissions bugs (602707 and 620007)
3267 - journal_stop fixed with locking (611313)
3268 - O_APPEND failures resolved (618273, perhaps 614459)
3269 - lconf PATH fix (619770)
3270 - IA64 build fix (621450)
3271 - RPC buffer sizes scale with amount of memory
3273 2002-10-01 Phil Schwan <phil@clusterfs.com>
3276 - locks would be cancelled without throwing away data pages,
3277 resulting in inconsistent data (605627)
3278 - inode attributes were not always being refreshed (605627, 612449)
3279 - lconf now continues to cleanup after lctl reports an error
3280 - MDS now enforces user permissions (602707)
3281 - lprocfs cleanup fixed, but not yet enabled (614157)
3282 - fixed infinite server hang, should a client not respond to an AST
3283 - avoid going into recovery if user calls readlink() with a buffer
3284 that's too small (613941)
3285 - AST RPCs no longer require replies (614867) -- this may be changed
3286 - don't crash server if client sends an IOV that's too big (611336)
3287 - fixed lock conversion deadlock (611892)
3288 - fixed the following of symlinks (614622)
3289 * recovery: the server can remove locks from a client that dies, other
3290 clients can make progress
3291 * more extN patch fixes
3292 * compile-time configurable ptlrpc buffer allocations
3294 - collaborative read cache document
3295 - Lustre Lite Performance CDR document-in-progress
3297 2002-09-20 Andreas Dilger <adilger@clusterfs.com>
3300 - fix typo in patch-2.4.18
3302 2002-09-20 Andreas Dilger <adilger@clusterfs.com>
3305 - clear ptlrpc request each time in handle_incoming_request()
3306 - unlink of files now destroys the object on the OST
3308 2002-09-19 Peter Braam <braam@clusterfs.com>
3310 * add hard link support
3311 * change obdfile creation method
3312 * kernel patch changed
3314 2002-09-19 Peter Braam <braam@clusterfs.com>
3317 - stack overflow bug in extN fixed
3319 2002-09-18 Andreas Dilger <adilger@clusterfs.com>
3321 * documentation updates
3322 - add man pages for config tools
3323 - update tests/README to describe testing with new config tools
3324 - finish metadata API descriptions
3325 * bug fixes and cleanups
3326 - statfs workaround for 16TB limit
3327 - LOV stripe allocation improved, can stripe on subset of OSTs
3328 - LOV file size/IO offset was wrong for files > 4GB in size
3329 - object EA data was being dropped, caused files to be unreadable
3330 - memory overflow with non-LOV OST caused memory corruption
3331 - fixed regression tests to work with new config tools, obdfilter
3332 - fixed bug when directory size became larger than 1 block
3333 - fixed bug (for single client case) when PWD was deleted
3334 - invalidate local directory pages when doing intent-based ops
3335 - avoid LDLM oops when lock callback contained bad data
3337 2002-09-09 Andreas Dilger <adilger@clusterfs.com>
3339 * documentation updates
3340 * bug fixes and cleanups
3341 - configuration tools
3344 - 64-bit compile warnings
3345 - 64-bit internal statfs data
3347 * test_brw on persistent OST devices
3349 * lprocfs (disabled)
3351 2002-09-04 Andreas Dilger <adilger@clusterfs.com>
3353 * documentation updates
3354 * bug fixes and cleanups
3355 * configuration tools
3357 2002-08-30 Peter J. Braam <braam@clusterfs.com>
3360 * many small fixes to 0_5_4
3361 * io/network handling
3362 * thinkos in MDS operations
3364 2002-08-24 Peter J. Braam <braam@clusterfs.com>
3367 * crucial basic fixes to 0.5.3
3368 * IOR, Iozone work over Elan
3371 2002-08-07 Phil Schwan <phil@clusterfs.com>
3372 * version 0_5_3, our first alpha
3373 * we use the new Portals iovs
3374 * documentation updates
3375 * bug fixes and cleanups
3376 * small changes in the DLM wire protocol
3378 2002-07-25 Peter J. Braam <braam@clusterfs.com>
3379 * version 0_5_1 with some initial stability,
3380 * locking on MD and file I/O.
3381 * documentation updates
3382 * several bug fixes since 0.5.0
3383 * small changes in wire protocol
3385 2002-07-18 Phil Schwan <phil@clusterfs.com>
3387 * delivered as Lustre Light Alpha
3388 * fixed a crash after handling invalid MDS requests
3389 * fixed directory pages for architectures with non-4k pages sizes
3391 2002-07-11 Andreas Dilger <adilger@clusterfs.com>
3392 * release version v0_4_4
3393 * Moves TCP acceptor to be on port 2432 (unused Coda port) instead
3395 * Fixes a number of interruption problems with OST operations.
3396 * Update documentation for portals header changes
3397 * Move all wire protocol structs/defines to lustre_idl.h
3398 * Fixes symlink length bug.
3399 * Add tcpdump to repository.
3401 2002-07-05 Andreas Dilger <adilger@clusterfs.com>
3402 * release version v0_4_3
3403 * Fixes statfs for inodes on extN.
3404 * Fixes bug in runtests which would delete /etc/hosts.
3405 * Use 64-bit object IDs wherever possible (not into VFS though)
3406 Remove ost_get_info, which is unused by lustre, and out of date.
3408 2002-07-03 Peter Braam <braam@clusterfs.com>
3409 * release version v0_4_2 Fixes a lookup error (type not passed)
3410 * move forward to head of Portals
3411 * move forward to latest Lustre kernel
3413 2002-06-25 Peter Braam <braam@clusterfs.com>
3414 * release version v0_4_1. Hopefully stable on single node use.
git://git.whamcloud.com / fs / lustre-release.git / blob