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1b939560be
mirror_zfs/module/zfs
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Brian Behlendorf 1b939560be
Add TRIM support 
UNMAP/TRIM support is a frequently-requested feature to help
prevent performance from degrading on SSDs and on various other
SAN-like storage back-ends.  By issuing UNMAP/TRIM commands for
sectors which are no longer allocated the underlying device can
often more efficiently manage itself.

This TRIM implementation is modeled on the `zpool initialize`
feature which writes a pattern to all unallocated space in the
pool.  The new `zpool trim` command uses the same vdev_xlate()
code to calculate what sectors are unallocated, the same per-
vdev TRIM thread model and locking, and the same basic CLI for
a consistent user experience.  The core difference is that
instead of writing a pattern it will issue UNMAP/TRIM commands
for those extents.

The zio pipeline was updated to accommodate this by adding a new
ZIO_TYPE_TRIM type and associated spa taskq.  This new type makes
is straight forward to add the platform specific TRIM/UNMAP calls
to vdev_disk.c and vdev_file.c.  These new ZIO_TYPE_TRIM zios are
handled largely the same way as ZIO_TYPE_READs or ZIO_TYPE_WRITEs.
This makes it possible to largely avoid changing the pipieline,
one exception is that TRIM zio's may exceed the 16M block size
limit since they contain no data.

In addition to the manual `zpool trim` command, a background
automatic TRIM was added and is controlled by the 'autotrim'
property.  It relies on the exact same infrastructure as the
manual TRIM.  However, instead of relying on the extents in a
metaslab's ms_allocatable range tree, a ms_trim tree is kept
per metaslab.  When 'autotrim=on', ranges added back to the
ms_allocatable tree are also added to the ms_free tree.  The
ms_free tree is then periodically consumed by an autotrim
thread which systematically walks a top level vdev's metaslabs.

Since the automatic TRIM will skip ranges it considers too small
there is value in occasionally running a full `zpool trim`.  This
may occur when the freed blocks are small and not enough time
was allowed to aggregate them.  An automatic TRIM and a manual
`zpool trim` may be run concurrently, in which case the automatic
TRIM will yield to the manual TRIM.

Reviewed-by: Jorgen Lundman <lundman@lundman.net>
Reviewed-by: Tim Chase <tim@chase2k.com>
Reviewed-by: Matt Ahrens <mahrens@delphix.com>
Reviewed-by: George Wilson <george.wilson@delphix.com>
Reviewed-by: Serapheim Dimitropoulos <serapheim@delphix.com>
Contributions-by: Saso Kiselkov <saso.kiselkov@nexenta.com>
Contributions-by: Tim Chase <tim@chase2k.com>
Contributions-by: Chunwei Chen <tuxoko@gmail.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #8419 
Closes #598
2019-03-29 09:13:20 -07:00
..
abd.c abd_alloc should use scatter for >1K allocations 2019-02-28 17:52:55 -08:00
aggsum.c OpenZFS 9688 - aggsum_fini leaks memory 2018-10-19 12:08:03 -07:00
arc.c Fix l2arc_evict() destroy race 2019-03-15 14:17:38 -07:00
blkptr.c Undo c89 workarounds to match with upstream 2017-11-04 13:25:13 -07:00
bplist.c Change KM_PUSHPAGE -> KM_SLEEP 2015-01-16 14:41:26 -08:00
bpobj.c Stack overflow in recursive bpobj_iterate_impl 2019-03-06 09:50:55 -08:00
bptree.c Native Encryption for ZFS on Linux 2017-08-14 10:36:48 -07:00
bqueue.c Call cv_signal() with mutex held 2017-06-26 14:36:49 -07:00
cityhash.c OpenZFS 8484 - Implement aggregate sum and use for arc counters 2018-06-06 09:35:59 -07:00
dataset_kstats.c port async unlinked drain from illumos-nexenta 2019-02-12 10:41:15 -08:00
dbuf_stats.c Prefix all refcount functions with zfs_ 2018-10-01 10:42:05 -07:00
dbuf.c Fix handling of maxblkid for raw sends 2019-03-13 10:52:01 -07:00
ddt_zap.c Update build system and packaging 2018-05-29 16:00:33 -07:00
ddt.c ztest: scrub ddt repair 2019-01-17 15:25:00 -08:00
dmu_diff.c Fix issues found with zfs diff 2018-05-01 11:24:20 -07:00
dmu_object.c Provide more flexible object allocation interface 2019-01-10 14:37:43 -08:00
dmu_objset.c Prevent user accounting on readonly pool 2019-02-19 18:41:18 -08:00
dmu_recv.c Fix issues with truncated files in raw sends 2019-03-27 11:30:48 -07:00
dmu_send.c Detect and prevent mixed raw and non-raw sends 2019-03-13 11:00:43 -07:00
dmu_traverse.c Fix traverse_impl() kmem leak 2018-08-15 09:53:44 -07:00
dmu_tx.c Prefix all refcount functions with zfs_ 2018-10-01 10:42:05 -07:00
dmu_zfetch.c Update build system and packaging 2018-05-29 16:00:33 -07:00
dmu.c Add TRIM support 2019-03-29 09:13:20 -07:00
dnode_sync.c Fix handling of maxblkid for raw sends 2019-03-13 10:52:01 -07:00
dnode.c Fix issues with truncated files in raw sends 2019-03-27 11:30:48 -07:00
dsl_bookmark.c Detect and prevent mixed raw and non-raw sends 2019-03-13 11:00:43 -07:00
dsl_crypt.c Better user experience for errata 4 2019-03-14 16:48:30 -07:00
dsl_dataset.c Mutex leak in dsl_dataset_hold_obj() 2019-03-21 10:36:58 -07:00
dsl_deadlist.c OpenZFS 7614, 9064 - zfs device evacuation/removal 2018-04-14 12:16:17 -07:00
dsl_deleg.c Update build system and packaging 2018-05-29 16:00:33 -07:00
dsl_destroy.c zfs receive and rollback can skew filesystem_count 2019-01-08 10:17:46 -08:00
dsl_dir.c ZVOLs should not be allowed to have children 2019-02-08 15:44:15 -08:00
dsl_pool.c port async unlinked drain from illumos-nexenta 2019-02-12 10:41:15 -08:00
dsl_prop.c Update build system and packaging 2018-05-29 16:00:33 -07:00
dsl_scan.c Multiple DVA Scrubbing Fix 2019-03-15 14:14:31 -07:00
dsl_synctask.c OpenZFS 9166 - zfs storage pool checkpoint 2018-06-26 10:07:42 -07:00
dsl_userhold.c zfs should optionally send holds 2019-02-15 12:41:38 -08:00
edonr_zfs.c DLPX-44812 integrate EP-220 large memory scalability 2016-11-29 14:34:27 -08:00
fm.c OpenZFS 9580 - Add a hash-table on top of nvlist to speed-up operations 2018-07-30 11:30:03 -07:00
gzip.c Update build system and packaging 2018-05-29 16:00:33 -07:00
hkdf.c Encryption patch follow-up 2017-10-11 16:54:48 -04:00
lz4.c Fix LZ4_uncompress_unknownOutputSize caused panic 2017-05-19 13:45:46 -07:00
lzjb.c Change KM_PUSHPAGE -> KM_SLEEP 2015-01-16 14:41:26 -08:00
Makefile.in Add TRIM support 2019-03-29 09:13:20 -07:00
metaslab.c Add TRIM support 2019-03-29 09:13:20 -07:00
mmp.c MMP interval and fail_intervals in uberblock 2019-03-21 12:47:57 -07:00
multilist.c Update build system and packaging 2018-05-29 16:00:33 -07:00
pathname.c Update build system and packaging 2018-05-29 16:00:33 -07:00
policy.c Take user namespaces into account in policy checks 2018-03-07 15:40:42 -08:00
qat_compress.c Fix inst_num overflow in qat_crypt.c 2018-05-01 20:44:24 -07:00
qat_crypt.c QAT: Allocate digest_buffer using QAT_PHYS_CONTIG_ALLOC() 2019-03-21 10:35:18 -07:00
qat.c SHA256 QAT acceleration 2018-03-15 10:53:58 -07:00
qat.h Resolve QAT issues with incompressible data 2018-03-29 17:40:34 -07:00
range_tree.c Rename range_tree_verify to range_tree_verify_not_present 2019-01-25 09:51:24 -08:00
refcount.c Add zfs_refcount_transfer_ownership_many() 2018-10-09 10:05:48 -07:00
rrwlock.c Prefix all refcount functions with zfs_ 2018-10-01 10:42:05 -07:00
sa.c Prefix all refcount functions with zfs_ 2018-10-01 10:42:05 -07:00
sha256.c SHA256 QAT acceleration 2018-03-15 10:53:58 -07:00
skein_zfs.c DLPX-44812 integrate EP-220 large memory scalability 2016-11-29 14:34:27 -08:00
spa_boot.c Add linux kernel module support 2010-08-31 13:41:58 -07:00
spa_checkpoint.c Get rid of space_map_update() for ms_synced_length 2019-02-12 10:38:11 -08:00
spa_config.c OpenZFS 9591 - ms_shift can be incorrectly changed 2018-06-21 09:35:26 -07:00
spa_errlog.c Update build system and packaging 2018-05-29 16:00:33 -07:00
spa_history.c Create /proc/sys/kernel/spl/gitrev with git hash 2018-10-08 21:57:02 -07:00
spa_misc.c Add TRIM support 2019-03-29 09:13:20 -07:00
spa_stats.c Add TRIM support 2019-03-29 09:13:20 -07:00
spa.c Add TRIM support 2019-03-29 09:13:20 -07:00
space_map.c Get rid of space_map_update() for ms_synced_length 2019-02-12 10:38:11 -08:00
space_reftree.c OpenZFS 7614, 9064 - zfs device evacuation/removal 2018-04-14 12:16:17 -07:00
THIRDPARTYLICENSE.cityhash OpenZFS 8484 - Implement aggregate sum and use for arc counters 2018-06-06 09:35:59 -07:00
THIRDPARTYLICENSE.cityhash.descrip OpenZFS 8484 - Implement aggregate sum and use for arc counters 2018-06-06 09:35:59 -07:00
trace.c OpenZFS 7614, 9064 - zfs device evacuation/removal 2018-04-14 12:16:17 -07:00
txg.c Add TRIM support 2019-03-29 09:13:20 -07:00
uberblock.c MMP interval and fail_intervals in uberblock 2019-03-21 12:47:57 -07:00
unique.c Performance optimization of AVL tree comparator functions 2016-08-31 14:35:34 -07:00
vdev_cache.c Update build system and packaging 2018-05-29 16:00:33 -07:00
vdev_disk.c Add TRIM support 2019-03-29 09:13:20 -07:00
vdev_file.c Add TRIM support 2019-03-29 09:13:20 -07:00
vdev_indirect_births.c Update build system and packaging 2018-05-29 16:00:33 -07:00
vdev_indirect_mapping.c Get rid of space_map_update() for ms_synced_length 2019-02-12 10:38:11 -08:00
vdev_indirect.c Get rid of space_map_update() for ms_synced_length 2019-02-12 10:38:11 -08:00
vdev_initialize.c Add TRIM support 2019-03-29 09:13:20 -07:00
vdev_label.c Add TRIM support 2019-03-29 09:13:20 -07:00
vdev_mirror.c Multiple DVA Scrubbing Fix 2019-03-15 14:14:31 -07:00
vdev_missing.c OpenZFS 9102 - zfs should be able to initialize storage devices 2019-01-07 10:37:26 -08:00
vdev_queue.c Add TRIM support 2019-03-29 09:13:20 -07:00
vdev_raidz_math_aarch64_neon_common.h ABD raidz NEON support 2016-11-29 14:34:33 -08:00
vdev_raidz_math_aarch64_neon.c codebase style improvements for OpenZFS 6459 port 2017-01-22 13:25:40 -08:00
vdev_raidz_math_aarch64_neonx2.c ABD raidz NEON support 2016-11-29 14:34:33 -08:00
vdev_raidz_math_avx2.c ABD raidz avx512f support 2016-11-29 14:34:33 -08:00
vdev_raidz_math_avx512bw.c ABD: Adapt avx512bw raidz assembly 2016-12-15 17:31:33 -08:00
vdev_raidz_math_avx512f.c Use cstyle -cpP in make cstyle check 2016-12-12 10:46:26 -08:00
vdev_raidz_math_impl.h codebase style improvements for OpenZFS 6459 port 2017-01-22 13:25:40 -08:00
vdev_raidz_math_scalar.c ABD Vectorized raidz 2016-11-29 14:34:33 -08:00
vdev_raidz_math_sse2.c ABD raidz avx512f support 2016-11-29 14:34:33 -08:00
vdev_raidz_math_ssse3.c codebase style improvements for OpenZFS 6459 port 2017-01-22 13:25:40 -08:00
vdev_raidz_math.c Update build system and packaging 2018-05-29 16:00:33 -07:00
vdev_raidz.c Add TRIM support 2019-03-29 09:13:20 -07:00
vdev_removal.c Add TRIM support 2019-03-29 09:13:20 -07:00
vdev_root.c OpenZFS 9102 - zfs should be able to initialize storage devices 2019-01-07 10:37:26 -08:00
vdev_trim.c Add TRIM support 2019-03-29 09:13:20 -07:00
vdev.c Add TRIM support 2019-03-29 09:13:20 -07:00
zap_leaf.c Off-by-one in zap_leaf_array_create() 2019-01-18 09:58:46 -08:00
zap_micro.c Provide more flexible object allocation interface 2019-01-10 14:37:43 -08:00
zap.c OpenZFS 9328 - zap code can take advantage of c99 2018-05-31 10:53:11 -07:00
zcp_get.c Detect and prevent mixed raw and non-raw sends 2019-03-13 11:00:43 -07:00
zcp_global.c OpenZFS 8600 - ZFS channel programs - snapshot 2018-02-08 15:29:24 -08:00
zcp_iter.c OpenZFS 9337 - zfs get all is slow due to uncached metadata 2018-07-12 10:49:27 -07:00
zcp_synctask.c OpenZFS 9166 - zfs storage pool checkpoint 2018-06-26 10:07:42 -07:00
zcp.c OpenZFS 9424 - ztest failure: "unprotected error in call to Lua API (Invalid value type 'function' for key 'error')" 2018-07-10 21:29:23 -07:00
zfeature.c Better user experience for errata 4 2019-03-14 16:48:30 -07:00
zfs_acl.c Update build system and packaging 2018-05-29 16:00:33 -07:00
zfs_byteswap.c Update build system and packaging 2018-05-29 16:00:33 -07:00
zfs_ctldir.c Update zfs_admin_snapshot value (disabled) 2018-11-08 16:17:12 -08:00
zfs_debug.c Fix dbgmsg printing in ztest and zdb 2018-10-24 14:36:50 -07:00
zfs_dir.c port async unlinked drain from illumos-nexenta 2019-02-12 10:41:15 -08:00
zfs_fm.c Add zpool status -s (slow I/Os) and -p (parseable) 2018-11-08 16:47:24 -08:00
zfs_fuid.c Update build system and packaging 2018-05-29 16:00:33 -07:00
zfs_ioctl.c Add TRIM support 2019-03-29 09:13:20 -07:00
zfs_log.c Update build system and packaging 2018-05-29 16:00:33 -07:00
zfs_onexit.c Update build system and packaging 2018-05-29 16:00:33 -07:00
zfs_ratelimit.c Change checksum & IO delay ratelimit values 2018-03-04 17:34:51 -08:00
zfs_replay.c Update build system and packaging 2018-05-29 16:00:33 -07:00
zfs_rlock.c OpenZFS 9689 - zfs range lock code should not be zpl-specific 2018-10-11 10:19:33 -07:00
zfs_sa.c Project Quota on ZFS 2018-02-13 14:54:54 -08:00
zfs_sysfs.c Add TRIM support 2019-03-29 09:13:20 -07:00
zfs_vfsops.c Fix memory leaks in zfsvfs_create_impl() 2019-03-14 18:14:36 -07:00
zfs_vnops.c ZFS Reads may result in unneccesary calls to zil_commit 2019-03-22 13:09:11 -07:00
zfs_znode.c port async unlinked drain from illumos-nexenta 2019-02-12 10:41:15 -08:00
zil.c OpenZFS 9962 - zil_commit should omit cache thrash 2018-12-07 11:09:42 -08:00
zio_checksum.c Undo c89 workarounds to match with upstream 2017-11-04 13:25:13 -07:00
zio_compress.c OpenZFS 9403 - assertion failed in arc_buf_destroy() 2018-08-29 11:33:33 -07:00
zio_crypt.c Update build system and packaging 2018-05-29 16:00:33 -07:00
zio_inject.c Multiple DVA Scrubbing Fix 2019-03-15 14:14:31 -07:00
zio.c Add TRIM support 2019-03-29 09:13:20 -07:00
zle.c Fix zle_decompress out of bound access 2018-02-09 10:08:05 -08:00
zpl_ctldir.c RHEL 7.5 compat: FMODE_KABI_ITERATE 2018-05-02 15:01:24 -07:00
zpl_export.c Use cstyle -cpP in make cstyle check 2016-12-12 10:46:26 -08:00
zpl_file.c zfs does not honor NFS sync write semantics 2019-03-11 09:13:37 -07:00
zpl_inode.c Linux 4.18 compat: inode timespec -> timespec64 2018-06-19 21:51:18 -07:00
zpl_super.c Fix statfs(2) for 32-bit user space 2018-09-24 17:11:25 -07:00
zpl_xattr.c Add missing checks to zpl_xattr_* functions 2018-08-02 14:03:56 -07:00
zrlock.c Update build system and packaging 2018-05-29 16:00:33 -07:00
zthr.c Don't acquire zthr_request_lock in zthr_wakeup 2019-01-30 12:31:16 -08:00
zvol.c zvol: allow rename of in use ZVOL dataset 2019-02-22 15:38:42 -08:00