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411f4a018d7a5672701975b4fd8a697ddff16f33
mirror_zfs/module/zfs
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Shaan Nobee 411f4a018d Speed up WB_SYNC_NONE when a WB_SYNC_ALL occurs simultaneously 
Page writebacks with WB_SYNC_NONE can take several seconds to complete 
since they wait for the transaction group to close before being 
committed. This is usually not a problem since the caller does not 
need to wait. However, if we're simultaneously doing a writeback 
with WB_SYNC_ALL (e.g via msync), the latter can block for several 
seconds (up to zfs_txg_timeout) due to the active WB_SYNC_NONE 
writeback since it needs to wait for the transaction to complete 
and the PG_writeback bit to be cleared.

This commit deals with 2 cases:

- No page writeback is active. A WB_SYNC_ALL page writeback starts 
  and even completes. But when it's about to check if the PG_writeback 
  bit has been cleared, another writeback with WB_SYNC_NONE starts. 
  The sync page writeback ends up waiting for the non-sync page 
  writeback to complete.

- A page writeback with WB_SYNC_NONE is already active when a 
  WB_SYNC_ALL writeback starts. The WB_SYNC_ALL writeback ends up 
  waiting for the WB_SYNC_NONE writeback.

The fix works by carefully keeping track of active sync/non-sync 
writebacks and committing when beneficial.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Shaan Nobee <sniper111@gmail.com>
Closes #12662
Closes #12790
2022-05-03 13:23:26 -07:00
..
abd.c
Rename fallthrough to zfs_fallthrough
2022-02-15 08:58:59 -08:00
aggsum.c
Remove bcopy(), bzero(), bcmp()
2022-03-15 15:13:42 -07:00
arc.c
Improve the inline descriptions of the ARC module parameters
2022-04-20 13:16:25 -07:00
blkptr.c
Remove bcopy(), bzero(), bcmp()
2022-03-15 15:13:42 -07:00
bplist.c
Fast Clone Deletion
2019-07-26 10:54:14 -07:00
bpobj.c
Remove bcopy(), bzero(), bcmp()
2022-03-15 15:13:42 -07:00
bptree.c
module: zfs: fix unused, remove argsused
2021-12-23 09:42:47 -08:00
bqueue.c
Implement Redacted Send/Receive
2019-06-19 09:48:12 -07:00
btree.c
Remove bcopy(), bzero(), bcmp()
2022-03-15 15:13:42 -07:00
dataset_kstats.c
Remove bcopy(), bzero(), bcmp()
2022-03-15 15:13:42 -07:00
dbuf_stats.c
Clean up CSTYLEDs
2022-01-26 11:38:52 -08:00
dbuf.c
Switch from _Noreturn to __attribute__((noreturn))
2022-03-23 08:51:00 -07:00
ddt_zap.c
module/*.ko: prune .data, global .rodata
2022-01-14 15:37:55 -08:00
ddt.c
Remove bcopy(), bzero(), bcmp()
2022-03-15 15:13:42 -07:00
dmu_diff.c
module: zfs: fix unused, remove argsused
2021-12-23 09:42:47 -08:00
dmu_object.c
Introduce CPU_SEQID_UNSTABLE
2020-11-02 11:51:12 -08:00
dmu_objset.c
Remove bcopy(), bzero(), bcmp()
2022-03-15 15:13:42 -07:00
dmu_recv.c
Switch from _Noreturn to __attribute__((noreturn))
2022-03-23 08:51:00 -07:00
dmu_redact.c
Switch from _Noreturn to __attribute__((noreturn))
2022-03-23 08:51:00 -07:00
dmu_send.c
Switch from _Noreturn to __attribute__((noreturn))
2022-03-23 08:51:00 -07:00
dmu_traverse.c
Remove bcopy(), bzero(), bcmp()
2022-03-15 15:13:42 -07:00
dmu_tx.c
module: mark arguments used
2022-02-18 09:34:03 -08:00
dmu_zfetch.c
Clean up CSTYLEDs
2022-01-26 11:38:52 -08:00
dmu.c
Improve log spacemap load time
2022-04-26 10:44:21 -07:00
dnode_sync.c
Remove bcopy(), bzero(), bcmp()
2022-03-15 15:13:42 -07:00
dnode.c
Remove bcopy(), bzero(), bcmp()
2022-03-15 15:13:42 -07:00
dsl_bookmark.c
module: zfs: dsl_bookmark: silence false-positive maybe-uninitialised
2022-03-28 10:03:13 -07:00
dsl_crypt.c
Remove bcopy(), bzero(), bcmp()
2022-03-15 15:13:42 -07:00
dsl_dataset.c
Default zfs_max_recordsize to 16M
2022-04-28 15:12:24 -07:00
dsl_deadlist.c
Remove bcopy(), bzero(), bcmp()
2022-03-15 15:13:42 -07:00
dsl_deleg.c
Reduce loaded range tree memory usage
2019-10-09 10:36:03 -07:00
dsl_destroy.c
Improve zpool status output, list all affected datasets
2022-04-25 17:25:42 -07:00
dsl_dir.c
Fix ENOSPC when unlinking multiple files from full pool
2022-03-08 09:16:35 -08:00
dsl_pool.c
Fix ENOSPC when unlinking multiple files from full pool
2022-03-08 09:16:35 -08:00
dsl_prop.c
Rename fallthrough to zfs_fallthrough
2022-02-15 08:58:59 -08:00
dsl_scan.c
Remove bcopy(), bzero(), bcmp()
2022-03-15 15:13:42 -07:00
dsl_synctask.c
module: zfs: fix unused, remove argsused
2021-12-23 09:42:47 -08:00
dsl_userhold.c
Replace sprintf()->snprintf() and strcpy()->strlcpy()
2020-06-07 11:42:12 -07:00
edonr_zfs.c
Remove bcopy(), bzero(), bcmp()
2022-03-15 15:13:42 -07:00
fm.c
module/*.ko: prune .data, global .rodata
2022-01-14 15:37:55 -08:00
gzip.c
Forbid b{copy,zero,cmp}(). Don't include <strings.h> for <string.h>
2022-03-15 15:13:48 -07:00
hkdf.c
Remove bcopy(), bzero(), bcmp()
2022-03-15 15:13:42 -07:00
lz4_zfs.c
Updated the lz4 decompressor
2022-01-07 10:36:49 -08:00
lz4.c
lz4: Cherrypick fix for CVE-2021-3520
2022-01-12 16:14:36 -08:00
lzjb.c
module: zfs: fix unused, remove argsused
2021-12-23 09:42:47 -08:00
metaslab.c
Improve log spacemap load time
2022-04-26 10:44:21 -07:00
mmp.c
Switch from _Noreturn to __attribute__((noreturn))
2022-03-23 08:51:00 -07:00
multilist.c
Clean up CSTYLEDs
2022-01-26 11:38:52 -08:00
objlist.c
Implement Redacted Send/Receive
2019-06-19 09:48:12 -07:00
pathname.c
Replace ZFS on Linux references with OpenZFS
2020-10-08 20:10:13 -07:00
range_tree.c
Remove bcopy(), bzero(), bcmp()
2022-03-15 15:13:42 -07:00
refcount.c
module/*.ko: prune .data, global .rodata
2022-01-14 15:37:55 -08:00
rrwlock.c
Rename refcount.h to zfs_refcount.h
2020-07-29 16:35:33 -07:00
sa.c
Remove bcopy(), bzero(), bcmp()
2022-03-15 15:13:42 -07:00
sha256.c
module: zfs: fix unused, remove argsused
2021-12-23 09:42:47 -08:00
skein_zfs.c
Remove bcopy(), bzero(), bcmp()
2022-03-15 15:13:42 -07:00
spa_boot.c
Add include files for prototypes
2020-06-18 12:21:25 -07:00
spa_checkpoint.c
Remove bcopy(), bzero(), bcmp()
2022-03-15 15:13:42 -07:00
spa_config.c
Clean up CSTYLEDs
2022-01-26 11:38:52 -08:00
spa_errlog.c
Improve zpool status output, list all affected datasets
2022-04-25 17:25:42 -07:00
spa_history.c
module: mark arguments used
2022-02-18 09:34:03 -08:00
spa_log_spacemap.c
Improve log spacemap load time
2022-04-26 10:44:21 -07:00
spa_misc.c
Remove bcopy(), bzero(), bcmp()
2022-03-15 15:13:42 -07:00
spa_stats.c
Clean up CSTYLEDs
2022-01-26 11:38:52 -08:00
spa.c
Improve log spacemap load time
2022-04-26 10:44:21 -07:00
space_map.c
Remove bcopy(), bzero(), bcmp()
2022-03-15 15:13:42 -07:00
space_reftree.c
Reduce loaded range tree memory usage
2019-10-09 10:36:03 -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
txg.c
Switch from _Noreturn to __attribute__((noreturn))
2022-03-23 08:51:00 -07:00
uberblock.c
MMP interval and fail_intervals in uberblock
2019-03-21 12:47:57 -07:00
unique.c
Reduce loaded range tree memory usage
2019-10-09 10:36:03 -07:00
vdev_cache.c
Clean up CSTYLEDs
2022-01-26 11:38:52 -08:00
vdev_draid_rand.c
Distributed Spare (dRAID) Feature
2020-11-13 13:51:51 -08:00
vdev_draid.c
Remove bcopy(), bzero(), bcmp()
2022-03-15 15:13:42 -07:00
vdev_indirect_births.c
Remove bcopy(), bzero(), bcmp()
2022-03-15 15:13:42 -07:00
vdev_indirect_mapping.c
Remove bcopy(), bzero(), bcmp()
2022-03-15 15:13:42 -07:00
vdev_indirect.c
Remove bcopy(), bzero(), bcmp()
2022-03-15 15:13:42 -07:00
vdev_initialize.c
Switch from _Noreturn to __attribute__((noreturn))
2022-03-23 08:51:00 -07:00
vdev_label.c
Remove bcopy(), bzero(), bcmp()
2022-03-15 15:13:42 -07:00
vdev_mirror.c
Clean up CSTYLEDs
2022-01-26 11:38:52 -08:00
vdev_missing.c
module: zfs: fix unused, remove argsused
2021-12-23 09:42:47 -08:00
vdev_queue.c
Clean up CSTYLEDs
2022-01-26 11:38:52 -08:00
vdev_raidz_math_aarch64_neon_common.h
FreeBSD: fix the build with Clang 11
2020-08-17 15:40:17 -07:00
vdev_raidz_math_aarch64_neon.c
Linux 5.0 compat: SIMD compatibility
2019-07-12 09:31:20 -07:00
vdev_raidz_math_aarch64_neonx2.c
Linux 5.0 compat: SIMD compatibility
2019-07-12 09:31:20 -07:00
vdev_raidz_math_avx2.c
FreeBSD: fix the build with Clang 11
2020-08-17 15:40:17 -07:00
vdev_raidz_math_avx512bw.c
Refactor ccompile.h to not include system headers
2020-07-25 20:09:50 -07:00
vdev_raidz_math_avx512f.c
FreeBSD: fix the build with Clang 11
2020-08-17 15:40:17 -07:00
vdev_raidz_math_impl.h
Distributed Spare (dRAID) Feature
2020-11-13 13:51:51 -08:00
vdev_raidz_math_powerpc_altivec_common.h
FreeBSD: fix the build with Clang 11
2020-08-17 15:40:17 -07:00
vdev_raidz_math_powerpc_altivec.c
Prefix zfs internal endian checks with _ZFS
2020-07-28 13:02:49 -07:00
vdev_raidz_math_scalar.c
Rename fallthrough to zfs_fallthrough
2022-02-15 08:58:59 -08:00
vdev_raidz_math_sse2.c
FreeBSD: fix the build with Clang 11
2020-08-17 15:40:17 -07:00
vdev_raidz_math_ssse3.c
Refactor ccompile.h to not include system headers
2020-07-25 20:09:50 -07:00
vdev_raidz_math.c
module/*.ko: prune .data, global .rodata
2022-01-14 15:37:55 -08:00
vdev_raidz.c
Remove bcopy(), bzero(), bcmp()
2022-03-15 15:13:42 -07:00
vdev_rebuild.c
Switch from _Noreturn to __attribute__((noreturn))
2022-03-23 08:51:00 -07:00
vdev_removal.c
Improve log spacemap load time
2022-04-26 10:44:21 -07:00
vdev_root.c
Distributed Spare (dRAID) Feature
2020-11-13 13:51:51 -08:00
vdev_trim.c
Switch from _Noreturn to __attribute__((noreturn))
2022-03-23 08:51:00 -07:00
vdev.c
Improve log spacemap load time
2022-04-26 10:44:21 -07:00
zap_leaf.c
Remove bcopy(), bzero(), bcmp()
2022-03-15 15:13:42 -07:00
zap_micro.c
Remove bcopy(), bzero(), bcmp()
2022-03-15 15:13:42 -07:00
zap.c
Remove bcopy(), bzero(), bcmp()
2022-03-15 15:13:42 -07:00
zcp_get.c
Correct compilation errors reported by GCC 10/11
2022-02-20 19:20:00 -08:00
zcp_global.c
OpenZFS 8600 - ZFS channel programs - snapshot
2018-02-08 15:29:24 -08:00
zcp_iter.c
module/*.ko: prune .data, global .rodata
2022-01-14 15:37:55 -08:00
zcp_set.c
Support setting user properties in a channel program
2020-02-14 13:41:42 -08:00
zcp_synctask.c
module/*.ko: prune .data, global .rodata
2022-01-14 15:37:55 -08:00
zcp.c
Clean up CSTYLEDs
2022-01-26 11:38:52 -08:00
zfeature.c
Improve zpool status output, list all affected datasets
2022-04-25 17:25:42 -07:00
zfs_byteswap.c
module: mark arguments used
2022-02-18 09:34:03 -08:00
zfs_fm.c
Remove bcopy(), bzero(), bcmp()
2022-03-15 15:13:42 -07:00
zfs_fuid.c
Add const to nvlist functions to properly expose their real behavior
2021-12-06 18:19:13 -07:00
zfs_ioctl.c
Improve zpool status output, list all affected datasets
2022-04-25 17:25:42 -07:00
zfs_log.c
Remove bcopy(), bzero(), bcmp()
2022-03-15 15:13:42 -07:00
zfs_onexit.c
file reference counts can get corrupted
2021-07-10 19:00:37 -06:00
zfs_quota.c
File incorrectly zeroed when receiving incremental stream that toggles -L
2020-06-09 10:41:01 -07:00
zfs_ratelimit.c
Change checksum & IO delay ratelimit values
2018-03-04 17:34:51 -08:00
zfs_replay.c
Remove bcopy(), bzero(), bcmp()
2022-03-15 15:13:42 -07:00
zfs_rlock.c
Add a "try" operation for range locks
2020-07-06 11:53:31 -07:00
zfs_sa.c
Remove bcopy(), bzero(), bcmp()
2022-03-15 15:13:42 -07:00
zfs_vnops.c
Speed up WB_SYNC_NONE when a WB_SYNC_ALL occurs simultaneously
2022-05-03 13:23:26 -07:00
zil.c
Remove bcopy(), bzero(), bcmp()
2022-03-15 15:13:42 -07:00
zio_checksum.c
Remove bcopy(), bzero(), bcmp()
2022-03-15 15:13:42 -07:00
zio_compress.c
module: zfs: fix unused, remove argsused
2021-12-23 09:42:47 -08:00
zio_inject.c
module: zfs: zio_inject: zio_match_handler: don't << -1
2022-03-13 13:18:17 -07:00
zio.c
Default zfs_max_recordsize to 16M
2022-04-28 15:12:24 -07:00
zle.c
Add include files for prototypes
2020-06-18 12:21:25 -07:00
zrlock.c
Remove dead code
2020-06-18 12:21:18 -07:00
zthr.c
Switch from _Noreturn to __attribute__((noreturn))
2022-03-23 08:51:00 -07:00
zvol.c
Add missing replay entry in zvol_replay_vector for TX_SETSAXATTR
2022-05-02 11:01:26 -07:00