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d4a72f2386
mirror_zfs/module/zfs
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Tom Caputi d4a72f2386 Sequential scrub and resilvers 
Currently, scrubs and resilvers can take an extremely
long time to complete. This is largely due to the fact
that zfs scans process pools in logical order, as
determined by each block's bookmark. This makes sense
from a simplicity perspective, but blocks in zfs are
often scattered randomly across disks, particularly
due to zfs's copy-on-write mechanisms.

This patch improves performance by splitting scrubs
and resilvers into a metadata scanning phase and an IO
issuing phase. The metadata scan reads through the
structure of the pool and gathers an in-memory queue
of I/Os, sorted by size and offset on disk. The issuing
phase will then issue the scrub I/Os as sequentially as
possible, greatly improving performance.

This patch also updates and cleans up some of the scan
code which has not been updated in several years.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Authored-by: Saso Kiselkov <saso.kiselkov@nexenta.com>
Authored-by: Alek Pinchuk <apinchuk@datto.com>
Authored-by: Tom Caputi <tcaputi@datto.com>
Signed-off-by: Tom Caputi <tcaputi@datto.com>
Closes #3625 
Closes #6256
2017-11-15 17:27:01 -08:00
..
abd.c Undo c89 workarounds to match with upstream 2017-11-04 13:25:13 -07:00
arc.c Sequential scrub and resilvers 2017-11-15 17:27:01 -08:00
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 Undo c89 workarounds to match with upstream 2017-11-04 13:25:13 -07:00
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
dbuf_stats.c Improved dnode allocation and dmu_hold_impl() 2017-09-05 16:15:04 -07:00
dbuf.c Sequential scrub and resilvers 2017-11-15 17:27:01 -08:00
ddt_zap.c Change KM_PUSHPAGE -> KM_SLEEP 2015-01-16 14:41:26 -08:00
ddt.c Sequential scrub and resilvers 2017-11-15 17:27:01 -08:00
dmu_diff.c OpenZFS 6950 - ARC should cache compressed data 2016-09-13 09:58:33 -07:00
dmu_object.c Improved dnode allocation and dmu_hold_impl() 2017-09-05 16:15:04 -07:00
dmu_objset.c Long hold the dataset during upgrade 2017-11-10 13:37:10 -08:00
dmu_send.c Undo c89 workarounds to match with upstream 2017-11-04 13:25:13 -07:00
dmu_traverse.c Sequential scrub and resilvers 2017-11-15 17:27:01 -08:00
dmu_tx.c Undo c89 workarounds to match with upstream 2017-11-04 13:25:13 -07:00
dmu_zfetch.c Undo c89 workarounds to match with upstream 2017-11-04 13:25:13 -07:00
dmu.c Fix dirty check in dmu_offset_next() 2017-11-15 10:19:32 -08:00
dnode_sync.c Undo c89 workarounds to match with upstream 2017-11-04 13:25:13 -07:00
dnode.c Undo c89 workarounds to match with upstream 2017-11-04 13:25:13 -07:00
dsl_bookmark.c Undo c89 workarounds to match with upstream 2017-11-04 13:25:13 -07:00
dsl_crypt.c Fix encryption root hierarchy issue 2017-11-08 15:25:30 -08:00
dsl_dataset.c Undo c89 workarounds to match with upstream 2017-11-04 13:25:13 -07:00
dsl_deadlist.c OpenZFS 5428 - provide fts(), reallocarray(), and strtonum() 2017-07-08 20:35:35 -07:00
dsl_deleg.c Performance optimization of AVL tree comparator functions 2016-08-31 14:35:34 -07:00
dsl_destroy.c Undo c89 workarounds to match with upstream 2017-11-04 13:25:13 -07:00
dsl_dir.c Native Encryption for ZFS on Linux 2017-08-14 10:36:48 -07:00
dsl_pool.c Sequential scrub and resilvers 2017-11-15 17:27:01 -08:00
dsl_prop.c Native Encryption for ZFS on Linux 2017-08-14 10:36:48 -07:00
dsl_scan.c Sequential scrub and resilvers 2017-11-15 17:27:01 -08:00
dsl_synctask.c Illumos 4951 - ZFS administrative commands should use reserved space 2015-05-04 09:41:10 -07:00
dsl_userhold.c Undo c89 workarounds to match with upstream 2017-11-04 13:25:13 -07:00
edonr_zfs.c DLPX-44812 integrate EP-220 large memory scalability 2016-11-29 14:34:27 -08:00
fm.c Use SET_ERROR for constant non-zero return codes 2017-08-02 21:16:12 -07:00
gzip.c GZIP compression offloading with QAT accelerator 2017-03-22 17:58:47 -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 Encryption patch follow-up 2017-10-11 16:54:48 -04:00
metaslab.c Sequential scrub and resilvers 2017-11-15 17:27:01 -08:00
mmp.c Reimplement vdev_random_leaf and rename it 2017-09-22 14:29:26 -07:00
multilist.c Undo c89 workarounds to match with upstream 2017-11-04 13:25:13 -07:00
pathname.c Add pn_alloc()/pn_free() functions 2016-04-21 09:49:25 -07:00
policy.c codebase style improvements for OpenZFS 6459 port 2017-01-22 13:25:40 -08:00
qat_compress.c Bug fix in qat_compress.c when compressed size is < 4KB 2017-11-07 14:51:30 -08:00
qat_compress.h GZIP compression offloading with QAT accelerator 2017-03-22 17:58:47 -07:00
range_tree.c Sequential scrub and resilvers 2017-11-15 17:27:01 -08:00
refcount.c Linux 4.11 compat: avoid refcount_t name conflict 2017-02-28 16:10:18 -08:00
rrwlock.c Fix spelling 2017-01-03 11:31:18 -06:00
sa.c Fix coverity defects: CID 147474 2017-10-10 16:41:47 -07:00
sha256.c DLPX-44812 integrate EP-220 large memory scalability 2016-11-29 14:34:27 -08:00
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_config.c Undo c89 workarounds to match with upstream 2017-11-04 13:25:13 -07:00
spa_errlog.c Native Encryption for ZFS on Linux 2017-08-14 10:36:48 -07:00
spa_history.c Emit history events for 'zpool create' 2017-10-23 09:45:59 -07:00
spa_misc.c Sequential scrub and resilvers 2017-11-15 17:27:01 -08:00
spa_stats.c Update the default for zfs_txg_history 2017-09-29 15:58:52 -07:00
spa.c Sequential scrub and resilvers 2017-11-15 17:27:01 -08:00
space_map.c Undo c89 workarounds to match with upstream 2017-11-04 13:25:13 -07:00
space_reftree.c OpenZFS 6328 - Fix cstyle errors in zfs codebase 2017-01-12 09:42:11 -08:00
trace.c OpenZFS 6531 - Provide mechanism to artificially limit disk performance 2016-05-26 10:11:51 -07:00
txg.c Undo c89 workarounds to match with upstream 2017-11-04 13:25:13 -07:00
uberblock.c Multi-modifier protection (MMP) 2017-07-13 13:54:00 -04:00
unique.c Performance optimization of AVL tree comparator functions 2016-08-31 14:35:34 -07:00
vdev_cache.c Undo c89 workarounds to match with upstream 2017-11-04 13:25:13 -07:00
vdev_disk.c Fix printk() calls missing log level 2017-09-25 10:38:27 -07:00
vdev_file.c Skip spurious resilver IO on raidz vdev 2017-05-12 17:28:03 -07:00
vdev_label.c Undo c89 workarounds to match with upstream 2017-11-04 13:25:13 -07:00
vdev_mirror.c Undo c89 workarounds to match with upstream 2017-11-04 13:25:13 -07:00
vdev_missing.c Skip spurious resilver IO on raidz vdev 2017-05-12 17:28:03 -07:00
vdev_queue.c Sequential scrub and resilvers 2017-11-15 17:27:01 -08:00
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 codebase style improvements for OpenZFS 6459 port 2017-01-22 13:25:40 -08:00
vdev_raidz.c Undo c89 workarounds to match with upstream 2017-11-04 13:25:13 -07:00
vdev_root.c Undo c89 workarounds to match with upstream 2017-11-04 13:25:13 -07:00
vdev.c Sequential scrub and resilvers 2017-11-15 17:27:01 -08:00
zap_leaf.c Use SET_ERROR for constant non-zero return codes 2017-08-02 21:16:12 -07:00
zap_micro.c Undo c89 workarounds to match with upstream 2017-11-04 13:25:13 -07:00
zap.c Sequential scrub and resilvers 2017-11-15 17:27:01 -08:00
zfeature.c Undo c89 workarounds to match with upstream 2017-11-04 13:25:13 -07:00
zfs_acl.c Native Encryption for ZFS on Linux 2017-08-14 10:36:48 -07:00
zfs_byteswap.c Add linux kernel module support 2010-08-31 13:41:58 -07:00
zfs_ctldir.c Use SET_ERROR for constant non-zero return codes 2017-08-02 21:16:12 -07:00
zfs_debug.c Add line info and SET_ERROR() to ZFS debug log 2017-07-25 23:09:48 -07:00
zfs_dir.c Rename zfs_sb_t -> zfsvfs_t 2017-03-10 09:51:33 -08:00
zfs_fm.c Undo c89 workarounds to match with upstream 2017-11-04 13:25:13 -07:00
zfs_fuid.c Rename zfs_sb_t -> zfsvfs_t 2017-03-10 09:51:33 -08:00
zfs_ioctl.c Long hold the dataset during upgrade 2017-11-10 13:37:10 -08:00
zfs_log.c OpenZFS 7578 - Fix/improve some aspects of ZIL writing 2017-06-09 09:15:37 -07:00
zfs_onexit.c zfsdev_getminor() should check for invalid file handles 2015-06-22 17:02:13 -07:00
zfs_ratelimit.c Add libtpool (thread pools) 2017-08-09 15:31:08 -07:00
zfs_replay.c OpenZFS 8081 - Compiler warnings in zdb 2017-10-27 12:46:35 -07:00
zfs_rlock.c Fix spelling 2017-01-03 11:31:18 -06:00
zfs_sa.c Modifying XATTRs doesnt change the ctime 2017-09-13 12:20:07 -07:00
zfs_vfsops.c Long hold the dataset during upgrade 2017-11-10 13:37:10 -08:00
zfs_vnops.c Fix truncate(2) mtime and ctime handling 2017-11-13 09:24:26 -08:00
zfs_znode.c misc: fix meaningless values 2017-09-19 12:19:08 -07:00
zil.c Undo c89 workarounds to match with upstream 2017-11-04 13:25:13 -07:00
zio_checksum.c Undo c89 workarounds to match with upstream 2017-11-04 13:25:13 -07:00
zio_compress.c Undo c89 workarounds to match with upstream 2017-11-04 13:25:13 -07:00
zio_crypt.c Fix for #6714 2017-10-11 16:59:42 -04:00
zio_inject.c Undo c89 workarounds to match with upstream 2017-11-04 13:25:13 -07:00
zio.c Sequential scrub and resilvers 2017-11-15 17:27:01 -08:00
zle.c Update core ZFS code from build 121 to build 141. 2010-05-28 13:45:14 -07:00
zpl_ctldir.c Linux 4.12 compat: CURRENT_TIME removed 2017-05-10 09:30:48 -07:00
zpl_export.c Use cstyle -cpP in make cstyle check 2016-12-12 10:46:26 -08:00
zpl_file.c misc: fix meaningless values 2017-09-19 12:19:08 -07:00
zpl_inode.c Linux 4.12 compat: CURRENT_TIME removed 2017-05-10 09:30:48 -07:00
zpl_super.c Restructure mount option handling 2017-03-10 09:51:41 -08:00
zpl_xattr.c Modifying XATTRs doesnt change the ctime 2017-09-13 12:20:07 -07:00
zrlock.c Undo c89 workarounds to match with upstream 2017-11-04 13:25:13 -07:00
zvol.c OpenZFS 8081 - Compiler warnings in zdb 2017-10-27 12:46:35 -07:00