7303 dynamic metaslab selection Reviewed by: Alex Reece <alex@delphix.com> Reviewed by: Chris Siden <christopher.siden@delphix.com> Reviewed by: Dan Kimmel <dan.kimmel@delphix.com> Reviewed by: Matthew Ahrens <mahrens@delphix.com> Reviewed by: Paul Dagnelie <paul.dagnelie@delphix.com> Reviewed by: Pavel Zakharov <pavel.zakharov@delphix.com> Reviewed by: Prakash Surya <prakash.surya@delphix.com> Reviewed by: Don Brady <don.brady@intel.com> Approved by: Richard Lowe <richlowe@richlowe.net>

5960 zfs recv should prefetch indirect blocks 5925 zfs receive -o origin= Reviewed by: Prakash Surya <prakash.surya@delphix.com> Reviewed by: Matthew Ahrens <mahrens@delphix.com>

5164 space_map_max_blksz causes panic, does not work 5165 zdb fails assertion when run on pool with recently-enabled spacemap_histogram feature Reviewed by: Christopher Siden <christopher.siden@delphix.com> Reviewed by: George Wilson <george.wilson@delphix.com> Reviewed by: Saso Kiselkov <skiselkov.ml@gmail.com> Approved by: Dan McDonald <danmcd@omniti.com>

4976 zfs should only avoid writing to a failing non-redundant top-level vdev 4977 mdb error in ::spa_space from space_cb() if a metaslab's ms_sm is NULL 4978 ztest fails in get_metaslab_refcount() 4979 extend free space histogram to device and pool 4980 metaslabs should have a fragmentation metric 4981 remove fragmented ops vector from block allocator 4982 space_map object should proactively upgrade when feature is enabled 4983 need to collect metaslab information via mdb 4984 device selection should use fragmentation metric Reviewed by: Matthew Ahrens <mahrens@delphix.com> Reviewed by: Adam Leventhal <adam.leventhal@delphix.com> Reviewed by: Christopher Siden <christopher.siden@delphix.com> Approved by: Garrett D'Amore <garrett@damore.org>

4374 dn_free_ranges should use range_tree_t Reviewed by: George Wilson <george.wilson@delphix.com> Reviewed by: Max Grossman <max.grossman@delphix.com> Reviewed by: Christopher Siden <christopher.siden@delphix.com Reviewed by: Garrett D'Amore <garrett@damore.org> Reviewed by: Dan McDonald <danmcd@omniti.com> Approved by: Dan McDonald <danmcd@omniti.com>

4171 clean up spa_feature_*() interfaces 4172 implement extensible_dataset feature for use by other zpool features Reviewed by: Max Grossman <max.grossman@delphix.com> Reviewed by: Christopher Siden <christopher.siden@delphix.com> Reviewed by: George Wilson <george.wilson@delphix.com> Reviewed by: Jerry Jelinek <jerry.jelinek@joyent.com> Approved by: Garrett D'Amore <garrett@damore.org>

4101 metaslab_debug should allow for fine-grained control 4102 space_maps should store more information about themselves 4103 space map object blocksize should be increased 4104 ::spa_space no longer works 4105 removing a mirrored log device results in a leaked object 4106 asynchronously load metaslab Reviewed by: Matthew Ahrens <mahrens@delphix.com> Reviewed by: Adam Leventhal <ahl@delphix.com> Reviewed by: Sebastien Roy <seb@delphix.com> Approved by: Garrett D'Amore <garrett@damore.org>

3464 zfs synctask code needs restructuring Reviewed by: Dan Kimmel <dan.kimmel@delphix.com> Reviewed by: Adam Leventhal <ahl@delphix.com> Reviewed by: George Wilson <george.wilson@delphix.com> Reviewed by: Christopher Siden <christopher.siden@delphix.com> Approved by: Garrett D'Amore <garrett@damore.org>

3552 condensing one space map burns 3 seconds of CPU in spa_sync() thread 3564 spa_sync() spends 5-10% of its time in metaslab_sync() (when not condensing) 3566 recursive mutex panic in specfs Reviewed by: Adam Leventhal <ahl@delphix.com> Reviewed by: Dan Kimmel <dan.kimmel@delphix.com> Reviewed by: Matthew Ahrens <mahrens@delphix.com> Approved by: Richard Lowe <richlowe@richlowe.net>

3329 spa_sync() spends 10-20% of its time in spa_free_sync_cb() 3330 space_seg_t should have its own kmem_cache 3331 deferred frees should happen after sync_pass 1 3335 make SYNC_PASS_* constants tunable Reviewed by: Adam Leventhal <ahl@delphix.com> Reviewed by: Matt Ahrens <matthew.ahrens@delphix.com> Reviewed by: Christopher Siden <chris.siden@delphix.com> Reviewed by: Eric Schrock <eric.schrock@delphix.com> Reviewed by: Richard Lowe <richlowe@richlowe.net> Reviewed by: Dan McDonald <danmcd@nexenta.com> Approved by: Eric Schrock <eric.schrock@delphix.com>

3006 VERIFY[S,U,P] and ASSERT[S,U,P] frequently check if first argument is zero Reviewed by Matt Ahrens <matthew.ahrens@delphix.com> Reviewed by George Wilson <george.wilson@delphix.com> Approved by Eric Schrock <eric.schrock@delphix.com>

backout 3006: causes 3046 (panics after mounting root)

3006 VERIFY[S,U,P] and ASSERT[S,U,P] frequently check if first argument is zero Reviewed by: Matt Ahrens <matthew.ahrens@delphix.com> Reviewed by: George Wilson <george.wilson@delphix.com> Approved by: Garrett D'Amore <garrett@damore.org>

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

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()

6838062 zfs panics when an error is encountered in space_map_load()

6801810 Commit of aligned streaming rewrites to ZIL device causes unwanted disk reads

6596237 Stop looking and start ganging

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

6747934 Some locking variables are not properly initialized or destroyed

6657693 assertion failed: sm->sm_space == 0 (0x1000000000 == 0x0)

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

6458218 assertion failed: ss == NULL

6527325 want more assertions in space map code

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()

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