6863750 kmem metadata in zfs_file_data impedes debugging non-debug crash dumps
6942439 Sporadic complete I/O halts

PSARC 2010/306 Read-only ZFS pools
6720531 ZFS should provide read-only import

6494473 ZFS needs a way to slow down resilvering
6743992 scrub/resilver causes systemic slowdown
6936821 scrub/resilver io should not be suspended
6956464 otoro: head panic in zfs:dnode_hold_impl; during system disk zinject testing

6948890 snapshot deletion can induce pathologically long spa_sync() times

6938089 dedup-induced latency causes FC initiator logouts/FC port resets

6949730 spurious arc_free() can significantly exacerbate 6948890

6675946 'zpool status' should show the progress of resilvering for individual disk.
6683750 scrub -s have to wait until resilver completed?
6841252 Resilvering not restartable - causing an excess reboot delay
6855073 spa scrub stats (eg %done) are reset on reboot
6891824 7410 NAS head "continually resilvering" following HDD replacement
6899970 scrub/resilver percent complete reporting in zpool status can be overly optimistic
6940889 add interval (count) args to zpool list
6944623 dbuf_read_done() locking performance improvement
6946760 mutex problem in bplist_enqueue()
6391915 RFE: provide interval arg to zpool status to monitor resilvering
6946512 want zfs_send() to pass back debug info
6943992 'zpool scrub' should not restart the existing scrub silently
6878281 zpool should store the time of last scrub/resilver and other zpool status info in pool properties.
6935158 Assertion failed: used <= spa_get_dspace(dd->dd_pool->dp_spa)
6944388 dsl_dataset_snapshot_reserve_space() causes dp_write_limit=max

6595532 ZIL is too talkative
6388458 zil need not inflate blocksize that much
6738159 slog can probably pack 2X more data per lwb
6897432 ziltest_noslog fails after dedup putback
6911570 Shouldn't start an ereport on speculative read failure
6920442 ZIL: Should use the stronger checksum fletcher4

6881015 ZFS write activity prevents other threads from running in a timely manner
6899867 mstate_thread_onproc_time() doesn't account for runnable time correctly
PSARC/2009/615 System Duty Cycle Scheduling Class and ZFS IO Observability

6678033 resilver code should prefetch
6841580 zfs stack overflow when upgrading to userspace accounting
6859446 scrub doesn't pause correctly

6826241 Sync write IOPS drops dramatically during TXG sync
6869229 zfs should switch to shiny new metaslabs more frequently

6899923 vdev_offline/vdev_add deadlock
6900497 zdb -S could be much faster
6900898 deduped blocks should be scrubbed/resilvered exactly once

6899159 injection isn't trashing pools
6899160 pool recovery info sometimes not appearing

PSARC 2009/571 ZFS Deduplication Properties
6677093 zfs should have dedup capability

PSARC 2009/479 zpool recovery support
6667683 need a way to rollback to an uberblock from a previous txg
6885998 bad ASSERT() in traverse_zil_block()

6849167 40% write regression with multiple shares
6706578 a single zil writer should not abuse the slog

6846163 ZFS continues to use faulted logzilla, bringing system to a crawl
6872547 ztest LUN expansion test fails
6873635 zdb should be able to open a pool with a failed slog
6873654 system panics when a slog device is offlined
6875236 zdb should be able to dump the spa history

PSARC 2009/497 zfs checksum ereport payload additions
6867188 zfs checksum ereports could be more informative

PSARC 2009/423 ZFS logbias property
6832481 ZFS separate intent log bypass property

6843014 ZFS B_FAILFAST handling is broken

6844069 vdev_probe() starvation brings txg train to a screeching halt

6834217 godfather I/O should reexecute

6833711 gang leaders shouldn't have to be logical

PSARC/2009/204 ZFS user/group quotas & space accounting
6501037 want user/group quotas on ZFS
6830813 zfs list -t all fails assertion
6827260 assertion failed in arc_read(): hdr == pbuf->b_hdr
6815592 panic: No such hold X on refcount Y from zfs_znode_move
6759986 zfs list shows temporary %clone when doing online zfs recv

6792139 recovering from a suspended pool needs some work
6794830 reboot command hangs on a failed zfs pool

6798384 It can take a village to raise a zio

6713916 scrub/resilver needlessly decompress data

6328632 zpool offline is a bit too conservative
6739487 ASSERT: txg <= spa_final_txg due to scrub/export race
6767129 ASSERT: cvd->vdev_isspare, in spa_vdev_detach()
6747698 checksum failures after offline -t / export / import / scrub
6745863 ZFS writes to disk after it has been offlined
6722540 50% slowdown on scrub/resilver with certain vdev configurations
6759999 resilver logic rewrites ditto blocks on both source and destination
6758107 I/O should never suspend during spa_load()
6776548 codereview(1) runs off the page when faced with multi-line comments
6761406 AMD errata 91 workaround doesn't work on 64-bit systems

6646775 Speed up the dumpifying process for zvols

6754011 SPA 3.0: lock breakup, i/o pipeline refactoring, device failure handling
6667208 zfs/zpool commands on failed pool should not hang
6430480 grabbing config lock as writer during I/O load can take excessively long

6719934 assertion failed: ((&zh->zh_log)->blk_birth == 0), file: ../../common/fs/zfs/zil.c, line: 1336
6724738 ztest fails assertion in txg_list_destroy(): txg_list_empty(tl, t)

6343667 scrub/resilver has to start over when a snapshot is taken
6343693 'zpool status' gives delayed start for 'zpool scrub'
6670746 scrub on degraded pool return the status of 'resilver completed'?
6675685 DTL entries are lost resulting in checksum errors
6706404 get_history_one() can dereference off end of hist_event_table[]
6715414 assertion failed: ds->ds_owner != tag in dsl_dataset_rele()
6716437 ztest gets SEGV in arc_released()
6722838 bfu does not update grub

6721869 zil needs to pass block birth txg to zil_rewrite()

PSARC 2008/388 Short circuit for vdev probe failure
6410382 ZFS rename should update ->v_path
6633592 vdev_root_open() faulted logic doesn't work
6674674 zfs needs to handle more than EIO
6705158 failed log device should not be treated like normal toplevel vdev
6705232 vdev_not_present erroneously cleared in vdev_validate()
6705649 libses/libscsi plugins should be included in ABI exception list
6707536 zfs_case_timeout and associated code is unused
6707637 vdev_propagate_state() shouldn't skip log devices
6708095 better FMA integration for vdev probe failure
6708192 typo in fix for 6646106 breaks pool I/O failure handling
6709112 zio_should_retry() should account for vdev_is_failing
6718542 zinject doesn't work for file I/O probe failure
6719105 ses2: incorrect parsing of page 15 (nickname)

6616739 panic message ZFS: I/O failure (write on <unknown> is not very helpful
6623234 better FMA integration for 'failmode' property
6680971 blkbuf is leaked in zio_assess() on DEBUG bits for truly failed I/Os
6685865 vdev_disk_probe_io()/vdev_file_probe_io() dvd's setting is wrong

6429205 each zpool needs to monitor its throughput and throttle heavy writers
6528296 system hangs when swapping to a zvol
6662330 ::zfs_params should look for metaslab_gang_bang instead of zio_gang_bang

6640580 spa_get_random() is insanely slow in userland
6640559 db_last_dirty list may be updated incorrectly
6640582 zio_checksum_sha256() incorrect if buffer size not a multiple of 64
6550653 uberblock should be saved on more top levels
6640570 ZIL doesn't flush ditto block writes
6640578 some zio flags lost during I/O retry
6632372 ZFS label writing/checksumming hurts scalability of large configs

6354519 stack overflow in zfs due to zio pipeline
6533726 single-threaded checksum & parity calculations limit write bandwidth
6547248 ztest detects a future leak when there is none
6604198 zfs only using single cpu for compression (part II)

PSARC 2007/618 ZFS L2ARC
6536054 second tier ("external") ARC

6625167 gang blocks don't need to retry so hard

6621355 panic in vdev_disk_io_start when trying to write to a faulted device
6622732 Assertion failed: !(zio->io_flags & ZIO_FLAG_WRITE_RETRY), file ../../../uts/com mon/fs/zfs/zio.c
6623221 CIFS breaks ZFS root

PSARC 2007/567 zpool failmode property
6322646 ZFS should gracefully handle all devices failing (when writing)
6413847 vdev label write failure should be handled more gracefully
6417772 need nicer message on write failure
6417779 ZFS: I/O failure (write on ...) -- need to reallocate writes
6467927 Node gets into a panic loop when devices are fenced off
6565042 ZFS should gracefully handle all devices failing (when reading)
6596239 Stop issuing IOs to a vdev that is going to be removed

6584470 zdb needs to initialize the bpl_lock mutex
6583739 libzpool should check for properly initialized mutexes
6548010 unbalanced mutex_init/mutex_destroy issues in zfs
6502263 ZFS needs some more FreeBSD porting love
Contributed by Pawel Dawidek
6576827 multiple calls to spa_activate() can end up reinitializing all its mutexes
6576830 certain spa mutexes and condition variables need some love

6437054 vdev_cache wises up: increase DB performance by 16%

PSARC 2007/171 ZFS Separate Intent Log
6339640 Make ZIL use NVRAM when available.

6566482 panic replacing a pool device whilst intent log being used

PSARC 2007/197 ZFS hotplug
PSARC 2007/283 FMA for ZFS Phase 2
6401126 ZFS DE should verify that diagnosis is still valid before solving cases
6500545 ZFS does not handle changes in devids
6508521 zpool online should warn when it is being used incorrectly
6509807 ZFS checksum ereports are not being posted
6514712 zfs_nicenum() doesn't work with perfectly-sized buffers
6520510 media state doesn't get updated properly on device removal
6520513 ZFS should have better support for device removal
6520514 vdev state should be controlled through a single ioctl()
6520519 ZFS should diagnose faulty devices
6520947 ZFS DE should close cases which no longer apply
6521393 ZFS case timeout should be FMD_TYPE_TIME
6521624 fmd_hash_walk() can dump core when given a bad address
6521946 ZFS DE needlessly subscribes to faults
6522085 ZFS dictionary files contain spelling errors
6523185 vdev_reopen() doesn't correctly propagate state
6523555 'zpool online' should be less chatty unless something goes wrong
6527379 zpool(1M) should not try to open faulted devices
6527700 ZFS should post a sysevent when topology changes
6528194 lofi should support force unmap and DKIO_DEV_GONE
6528732 ZFS should store physical device path in addition to /dev path
6532635 ZFS keeps devices open unnecessarily
6532979 bad argument to ZFS_IOC_VDEV_ATTACH can panic system
6567983 deadlock with spa_scrub_thread() and spa_namespace_lock

6536445 want ::zio to show zio tree
6546214 zpool_find_import() leaks directory handle

6520462 assertion failed in zio_write_compress
6535715 assertion failed in dmu_get_replication_level when 'zpool upgrade'
6536527 want range-checking assertions when accessing dmu_ot[]

6460622 zio_nowait() doesn't live up to its name

6513020 zio pipeline went out to lunch

6512391 DMU should leverage ZIO dependencies to achieve greater parallelism

6480626 contention on spa_config_lock on niagra

6512311 zio_done() is chunky and needs to go on a diet

4894692 caching data in heap inflates crash dump
6499454 time to increase size of kmem default allocation caches
6499459 vm should stop checking kvp directly

6341569 zio_alloc_blk() vdev distribution performs badly
6428639 large writes to zvol synchs too much, better cut down a little
6444692 Need to flush disk write cache for dmu_sync buffers
6465634 zvol: dmu_sync() should be issued in parallel
6468731 lwb_state_t can be nuked
6470042 parallel dmu_sync() isn't being used
6471679 stash blocksize in zvol_state_t rather than reading in every zvol_log_write
6472230 ZIL vdev management is inefficient
6473775 zil_commit changes in snv_48 make it hot for O_DSYNC workloads
6478388 ZIL replay takes too long causing issues while booting
6486390 zil_commit could push more transactions
6486496 zil_replay() useful debug

6485955 need more dtrace probes

6460059 zfs destroy <snapshot> leaves behind kruft
6463788 'zfs recv -d' fails if some ancestors already exist
6464897 assertion failed: "BP_GET_COMPRESS(bp) == compress" zio.c, line:897
6472843 panic when write to zvol snapshot
6475506 panic in dmu_recvbackup due to NULL pointer dereference
6475942 need more assertions in dnode_destroy()
6477102 recvbackup ioctl does not advance file offset
6477103 read-only properties should be passed as nvlist
6477900 want more /etc/system tunables for ZFS performance analysis
6479497 ::abuf_find is broken

6463348 ZFS code could be more portable

PSARC 2006/223 ZFS Hot Spares
PSARC 2006/303 ZFS Clone Promotion
6276916 support for "clone swap"
6288488 du reports misleading size on RAID-Z
6393490 libzfs should be a real library
6397148 fbufs debug code should be removed from buf_hash_insert()
6405966 Hot Spare support in ZFS
6409302 passing a non-root vdev via zpool_create() panics system
6415739 assertion failed: !(zio->io_flags & 0x00040)
6416759 ::dbufs does not find bonus buffers anymore
6417978 double parity RAID-Z a.k.a. RAID6
6424554 full block re-writes need not read data in
6425111 detaching an offline device can result in import confusion

6410711 intent log blocks don't get invited to pool parties

6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
6410700 zdb should support reading raw blocks out of storage pool
6410709 ztest: spa config can change before pool export

6280668 pluggable block allocation policy
6399301 initial read of space maps is super slow
6407365 large-sector disk support in ZFS
6407366 ADVANCE_NOLOCK gathers MOS
6407367 three-way deadlock between db_mtx, dbuf_hash[], and ms_lock

PSARC 2006/077 zpool clear
PSARC 2006/139 FMA for ZFS
6284889 arc should replace the znode cache
6333006 DMU & DSL should not panic upon I/O error
6333092 concurrent reads to a file not scaling with number of readers
6338081 ZFS/FMA phase 1
6338386 need persistent error log
6341326 i/o error causes arc buf hash table corruption
6341639 zfs backup/restore should compute/verify checksum of backup stream
6348002 out of space due to changing properties
6354724 inaccurate error message from zfs restore
6354872 dmu_sync() blows predictive accounting
6355416 zpool scrubbing consumes all memory, system hung
6363995 df should only load libzfs when it encounters a ZFS filesystem
6366320 zfs backup/restore doesn't like signals
6368892 mount -m support needed for legacy mounts
6368902 boot archive fstat support needed for ZFS Mountroot
6369424 BFU complains when bfu'ing a ZFS root filesystem
6374062 mountroot support needed for ZFS
6376356 dirtying dbuf obj=43 lvl=0 blkid=0 but not tx_held
6378391 unused members of dmu_objset_stats_t
6378392 clean up zfs_cmd_t structure
6378685 buf_init should allocate its hash table more carefully
6378976 ziltest should be a first class citizen
6381086 zdb segfaults if there is a spa deferred-free bplist
6381203 deadlock due to i/o while assigning (tc_lock held)
6381209 freed space is not immediately available
6381344 'zpool clear'
6381345 FAULTED devices should really be UNAVAIL
6381346 import should mark devices as persistently unavailable
6383272 recursive mutex_enter() during log replay with zfs root
6386326 origin property is not displayed
6386354 libzfs does too much in its _init section, calls exit(1)
6386624 zpool should not complain about non-existent devices from libdiskmgt
6386910 spa needs to be i/o error hardened
6387735 need a mechanism to inject faults into ZFS
6387736 internal ZFS utilities should be placed in an ON-private package
6389928 libzfs should ship a lint library
6390609 malformed vdev config panics on zpool_create()
6390677 version number checking makes upgrades challenging
6390713 ztest hangs in zil_suspend()
6391873 metadata compression should be turned back on
6392113 ztest sometimes reports leaked blocks because ZIL isn't resilvered
6393004 minor memory leak in unique_insert()

6348089 panic in dbuf_remove_ref

6345023 /dev/zfs fails to open once ZFS module is unloaded
6345214 zfs IO buffers shouldn't get KMF_ flags on debug kernels

PSARC 2002/240 ZFS
6338653 Integrate ZFS
PSARC 2004/652 - DKIOCFLUSH
5096886 Write caching disks need mechanism to flush cache to physical media

6863750 kmem metadata in zfs_file_data impedes debugging non-debug crash dumps
6942439 Sporadic complete I/O halts

PSARC 2010/306 Read-only ZFS pools
6720531 ZFS should provide read-only import

6494473 ZFS needs a way to slow down resilvering
6743992 scrub/resilver causes systemic slowdown
6936821 scrub/resilver io should not be suspended
6956464 otoro: head panic in zfs:dnode_hold_impl; during system disk zinject testing

6948890 snapshot deletion can induce pathologically long spa_sync() times

6938089 dedup-induced latency causes FC initiator logouts/FC port resets

6949730 spurious arc_free() can significantly exacerbate 6948890

6675946 'zpool status' should show the progress of resilvering for individual disk.
6683750 scrub -s have to wait until resilver completed?
6841252 Resilvering not restartable - causing an excess reboot delay
6855073 spa scrub stats (eg %done) are reset on reboot
6891824 7410 NAS head "continually resilvering" following HDD replacement
6899970 scrub/resilver percent complete reporting in zpool status can be overly optimistic
6940889 add interval (count) args to zpool list
6944623 dbuf_read_done() locking performance improvement
6946760 mutex problem in bplist_enqueue()
6391915 RFE: provide interval arg to zpool status to monitor resilvering
6946512 want zfs_send() to pass back debug info
6943992 'zpool scrub' should not restart the existing scrub silently
6878281 zpool should store the time of last scrub/resilver and other zpool status info in pool properties.
6935158 Assertion failed: used <= spa_get_dspace(dd->dd_pool->dp_spa)
6944388 dsl_dataset_snapshot_reserve_space() causes dp_write_limit=max

6595532 ZIL is too talkative
6388458 zil need not inflate blocksize that much
6738159 slog can probably pack 2X more data per lwb
6897432 ziltest_noslog fails after dedup putback
6911570 Shouldn't start an ereport on speculative read failure
6920442 ZIL: Should use the stronger checksum fletcher4

6881015 ZFS write activity prevents other threads from running in a timely manner
6899867 mstate_thread_onproc_time() doesn't account for runnable time correctly
PSARC/2009/615 System Duty Cycle Scheduling Class and ZFS IO Observability

6678033 resilver code should prefetch
6841580 zfs stack overflow when upgrading to userspace accounting
6859446 scrub doesn't pause correctly

6826241 Sync write IOPS drops dramatically during TXG sync
6869229 zfs should switch to shiny new metaslabs more frequently

6899923 vdev_offline/vdev_add deadlock
6900497 zdb -S could be much faster
6900898 deduped blocks should be scrubbed/resilvered exactly once

6899159 injection isn't trashing pools
6899160 pool recovery info sometimes not appearing

PSARC 2009/571 ZFS Deduplication Properties
6677093 zfs should have dedup capability

PSARC 2009/479 zpool recovery support
6667683 need a way to rollback to an uberblock from a previous txg
6885998 bad ASSERT() in traverse_zil_block()

6849167 40% write regression with multiple shares
6706578 a single zil writer should not abuse the slog

6846163 ZFS continues to use faulted logzilla, bringing system to a crawl
6872547 ztest LUN expansion test fails
6873635 zdb should be able to open a pool with a failed slog
6873654 system panics when a slog device is offlined
6875236 zdb should be able to dump the spa history

PSARC 2009/497 zfs checksum ereport payload additions
6867188 zfs checksum ereports could be more informative

PSARC 2009/423 ZFS logbias property
6832481 ZFS separate intent log bypass property

6843014 ZFS B_FAILFAST handling is broken

6844069 vdev_probe() starvation brings txg train to a screeching halt

6834217 godfather I/O should reexecute

6833711 gang leaders shouldn't have to be logical

PSARC/2009/204 ZFS user/group quotas & space accounting
6501037 want user/group quotas on ZFS
6830813 zfs list -t all fails assertion
6827260 assertion failed in arc_read(): hdr == pbuf->b_hdr
6815592 panic: No such hold X on refcount Y from zfs_znode_move
6759986 zfs list shows temporary %clone when doing online zfs recv

6792139 recovering from a suspended pool needs some work
6794830 reboot command hangs on a failed zfs pool

6798384 It can take a village to raise a zio

6713916 scrub/resilver needlessly decompress data

6328632 zpool offline is a bit too conservative
6739487 ASSERT: txg <= spa_final_txg due to scrub/export race
6767129 ASSERT: cvd->vdev_isspare, in spa_vdev_detach()
6747698 checksum failures after offline -t / export / import / scrub
6745863 ZFS writes to disk after it has been offlined
6722540 50% slowdown on scrub/resilver with certain vdev configurations
6759999 resilver logic rewrites ditto blocks on both source and destination
6758107 I/O should never suspend during spa_load()
6776548 codereview(1) runs off the page when faced with multi-line comments
6761406 AMD errata 91 workaround doesn't work on 64-bit systems

6646775 Speed up the dumpifying process for zvols

6754011 SPA 3.0: lock breakup, i/o pipeline refactoring, device failure handling
6667208 zfs/zpool commands on failed pool should not hang
6430480 grabbing config lock as writer during I/O load can take excessively long

6719934 assertion failed: ((&zh->zh_log)->blk_birth == 0), file: ../../common/fs/zfs/zil.c, line: 1336
6724738 ztest fails assertion in txg_list_destroy(): txg_list_empty(tl, t)

6343667 scrub/resilver has to start over when a snapshot is taken
6343693 'zpool status' gives delayed start for 'zpool scrub'
6670746 scrub on degraded pool return the status of 'resilver completed'?
6675685 DTL entries are lost resulting in checksum errors
6706404 get_history_one() can dereference off end of hist_event_table[]
6715414 assertion failed: ds->ds_owner != tag in dsl_dataset_rele()
6716437 ztest gets SEGV in arc_released()
6722838 bfu does not update grub

6721869 zil needs to pass block birth txg to zil_rewrite()

PSARC 2008/388 Short circuit for vdev probe failure
6410382 ZFS rename should update ->v_path
6633592 vdev_root_open() faulted logic doesn't work
6674674 zfs needs to handle more than EIO
6705158 failed log device should not be treated like normal toplevel vdev
6705232 vdev_not_present erroneously cleared in vdev_validate()
6705649 libses/libscsi plugins should be included in ABI exception list
6707536 zfs_case_timeout and associated code is unused
6707637 vdev_propagate_state() shouldn't skip log devices
6708095 better FMA integration for vdev probe failure
6708192 typo in fix for 6646106 breaks pool I/O failure handling
6709112 zio_should_retry() should account for vdev_is_failing
6718542 zinject doesn't work for file I/O probe failure
6719105 ses2: incorrect parsing of page 15 (nickname)

6616739 panic message ZFS: I/O failure (write on <unknown> is not very helpful
6623234 better FMA integration for 'failmode' property
6680971 blkbuf is leaked in zio_assess() on DEBUG bits for truly failed I/Os
6685865 vdev_disk_probe_io()/vdev_file_probe_io() dvd's setting is wrong

6429205 each zpool needs to monitor its throughput and throttle heavy writers
6528296 system hangs when swapping to a zvol
6662330 ::zfs_params should look for metaslab_gang_bang instead of zio_gang_bang

6640580 spa_get_random() is insanely slow in userland
6640559 db_last_dirty list may be updated incorrectly
6640582 zio_checksum_sha256() incorrect if buffer size not a multiple of 64
6550653 uberblock should be saved on more top levels
6640570 ZIL doesn't flush ditto block writes
6640578 some zio flags lost during I/O retry
6632372 ZFS label writing/checksumming hurts scalability of large configs

PSARC 2007/618 ZFS L2ARC
6536054 second tier ("external") ARC

6625167 gang blocks don't need to retry so hard

6621355 panic in vdev_disk_io_start when trying to write to a faulted device
6622732 Assertion failed: !(zio->io_flags & ZIO_FLAG_WRITE_RETRY), file ../../../uts/com mon/fs/zfs/zio.c
6623221 CIFS breaks ZFS root

PSARC 2007/567 zpool failmode property
6322646 ZFS should gracefully handle all devices failing (when writing)
6413847 vdev label write failure should be handled more gracefully
6417772 need nicer message on write failure
6417779 ZFS: I/O failure (write on ...) -- need to reallocate writes
6467927 Node gets into a panic loop when devices are fenced off
6565042 ZFS should gracefully handle all devices failing (when reading)
6596239 Stop issuing IOs to a vdev that is going to be removed

6584470 zdb needs to initialize the bpl_lock mutex
6583739 libzpool should check for properly initialized mutexes
6548010 unbalanced mutex_init/mutex_destroy issues in zfs
6502263 ZFS needs some more FreeBSD porting love
Contributed by Pawel Dawidek
6576827 multiple calls to spa_activate() can end up reinitializing all its mutexes
6576830 certain spa mutexes and condition variables need some love

6437054 vdev_cache wises up: increase DB performance by 16%

PSARC 2007/171 ZFS Separate Intent Log
6339640 Make ZIL use NVRAM when available.

6566482 panic replacing a pool device whilst intent log being used

PSARC 2007/197 ZFS hotplug
PSARC 2007/283 FMA for ZFS Phase 2
6401126 ZFS DE should verify that diagnosis is still valid before solving cases
6500545 ZFS does not handle changes in devids
6508521 zpool online should warn when it is being used incorrectly
6509807 ZFS checksum ereports are not being posted
6514712 zfs_nicenum() doesn't work with perfectly-sized buffers
6520510 media state doesn't get updated properly on device removal
6520513 ZFS should have better support for device removal
6520514 vdev state should be controlled through a single ioctl()
6520519 ZFS should diagnose faulty devices
6520947 ZFS DE should close cases which no longer apply
6521393 ZFS case timeout should be FMD_TYPE_TIME
6521624 fmd_hash_walk() can dump core when given a bad address
6521946 ZFS DE needlessly subscribes to faults
6522085 ZFS dictionary files contain spelling errors
6523185 vdev_reopen() doesn't correctly propagate state
6523555 'zpool online' should be less chatty unless something goes wrong
6527379 zpool(1M) should not try to open faulted devices
6527700 ZFS should post a sysevent when topology changes
6528194 lofi should support force unmap and DKIO_DEV_GONE
6528732 ZFS should store physical device path in addition to /dev path
6532635 ZFS keeps devices open unnecessarily
6532979 bad argument to ZFS_IOC_VDEV_ATTACH can panic system
6567983 deadlock with spa_scrub_thread() and spa_namespace_lock

6536445 want ::zio to show zio tree
6546214 zpool_find_import() leaks directory handle

6520462 assertion failed in zio_write_compress
6535715 assertion failed in dmu_get_replication_level when 'zpool upgrade'
6536527 want range-checking assertions when accessing dmu_ot[]

6460622 zio_nowait() doesn't live up to its name

6513020 zio pipeline went out to lunch

6512391 DMU should leverage ZIO dependencies to achieve greater parallelism

6480626 contention on spa_config_lock on niagra

6512311 zio_done() is chunky and needs to go on a diet

4894692 caching data in heap inflates crash dump
6499454 time to increase size of kmem default allocation caches
6499459 vm should stop checking kvp directly

6341569 zio_alloc_blk() vdev distribution performs badly
6428639 large writes to zvol synchs too much, better cut down a little
6444692 Need to flush disk write cache for dmu_sync buffers
6465634 zvol: dmu_sync() should be issued in parallel
6468731 lwb_state_t can be nuked
6470042 parallel dmu_sync() isn't being used
6471679 stash blocksize in zvol_state_t rather than reading in every zvol_log_write
6472230 ZIL vdev management is inefficient
6473775 zil_commit changes in snv_48 make it hot for O_DSYNC workloads
6478388 ZIL replay takes too long causing issues while booting
6486390 zil_commit could push more transactions
6486496 zil_replay() useful debug

6485955 need more dtrace probes

6460059 zfs destroy <snapshot> leaves behind kruft
6463788 'zfs recv -d' fails if some ancestors already exist
6464897 assertion failed: "BP_GET_COMPRESS(bp) == compress" zio.c, line:897
6472843 panic when write to zvol snapshot
6475506 panic in dmu_recvbackup due to NULL pointer dereference
6475942 need more assertions in dnode_destroy()
6477102 recvbackup ioctl does not advance file offset
6477103 read-only properties should be passed as nvlist
6477900 want more /etc/system tunables for ZFS performance analysis
6479497 ::abuf_find is broken

6463348 ZFS code could be more portable

PSARC 2006/223 ZFS Hot Spares
PSARC 2006/303 ZFS Clone Promotion
6276916 support for "clone swap"
6288488 du reports misleading size on RAID-Z
6393490 libzfs should be a real library
6397148 fbufs debug code should be removed from buf_hash_insert()
6405966 Hot Spare support in ZFS
6409302 passing a non-root vdev via zpool_create() panics system
6415739 assertion failed: !(zio->io_flags & 0x00040)
6416759 ::dbufs does not find bonus buffers anymore
6417978 double parity RAID-Z a.k.a. RAID6
6424554 full block re-writes need not read data in
6425111 detaching an offline device can result in import confusion

6410711 intent log blocks don't get invited to pool parties

6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
6410700 zdb should support reading raw blocks out of storage pool
6410709 ztest: spa config can change before pool export

6280668 pluggable block allocation policy
6399301 initial read of space maps is super slow
6407365 large-sector disk support in ZFS
6407366 ADVANCE_NOLOCK gathers MOS
6407367 three-way deadlock between db_mtx, dbuf_hash[], and ms_lock

PSARC 2006/077 zpool clear
PSARC 2006/139 FMA for ZFS
6284889 arc should replace the znode cache
6333006 DMU & DSL should not panic upon I/O error
6333092 concurrent reads to a file not scaling with number of readers
6338081 ZFS/FMA phase 1
6338386 need persistent error log
6341326 i/o error causes arc buf hash table corruption
6341639 zfs backup/restore should compute/verify checksum of backup stream
6348002 out of space due to changing properties
6354724 inaccurate error message from zfs restore
6354872 dmu_sync() blows predictive accounting
6355416 zpool scrubbing consumes all memory, system hung
6363995 df should only load libzfs when it encounters a ZFS filesystem
6366320 zfs backup/restore doesn't like signals
6368892 mount -m support needed for legacy mounts
6368902 boot archive fstat support needed for ZFS Mountroot
6369424 BFU complains when bfu'ing a ZFS root filesystem
6374062 mountroot support needed for ZFS
6376356 dirtying dbuf obj=43 lvl=0 blkid=0 but not tx_held
6378391 unused members of dmu_objset_stats_t
6378392 clean up zfs_cmd_t structure
6378685 buf_init should allocate its hash table more carefully
6378976 ziltest should be a first class citizen
6381086 zdb segfaults if there is a spa deferred-free bplist
6381203 deadlock due to i/o while assigning (tc_lock held)
6381209 freed space is not immediately available
6381344 'zpool clear'
6381345 FAULTED devices should really be UNAVAIL
6381346 import should mark devices as persistently unavailable
6383272 recursive mutex_enter() during log replay with zfs root
6386326 origin property is not displayed
6386354 libzfs does too much in its _init section, calls exit(1)
6386624 zpool should not complain about non-existent devices from libdiskmgt
6386910 spa needs to be i/o error hardened
6387735 need a mechanism to inject faults into ZFS
6387736 internal ZFS utilities should be placed in an ON-private package
6389928 libzfs should ship a lint library
6390609 malformed vdev config panics on zpool_create()
6390677 version number checking makes upgrades challenging
6390713 ztest hangs in zil_suspend()
6391873 metadata compression should be turned back on
6392113 ztest sometimes reports leaked blocks because ZIL isn't resilvered
6393004 minor memory leak in unique_insert()

6348089 panic in dbuf_remove_ref

6345023 /dev/zfs fails to open once ZFS module is unloaded
6345214 zfs IO buffers shouldn't get KMF_ flags on debug kernels

PSARC 2002/240 ZFS
6338653 Integrate ZFS
PSARC 2004/652 - DKIOCFLUSH
5096886 Write caching disks need mechanism to flush cache to physical media