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1ced0ff5de5d021bda4ea02af5a2af00a40fb220
mirror_zfs/module/zfs
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Alexander Motin 1ced0ff5de Reduce zfs_dmu_offset_next_sync penalty 
Looking on txg_wait_synced(, 0) I've noticed that it always syncs
5 TXGs: 3 TXG_CONCURRENT_STATES + 2 TXG_DEFER_SIZE.  But in case
of dmu_offset_next() we do not care about deferred frees. And even
concurrent TXGs we might not need sync all 3 if the dnode was not
dirtied in last few TXGs.

This patch makes dmu_offset_next() to sync one TXG at a time until
the dnode is clean, but no more than 3 TXG_CONCURRENT_STATES times.
My tests with random simultaneous writes and seeks over many files
on HDD pool show 7-14% performance increase.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Rob Norris <robn@despairlabs.com>
Signed-off-by:	Alexander Motin <mav@FreeBSD.org>
Sponsored by:	iXsystems, Inc.
Closes #17434
2025-11-03 13:51:00 -08:00
..
abd.c
abd: add page iterator
2024-03-28 13:29:46 -07:00
aggsum.c
Remove bcopy(), bzero(), bcmp()
2022-03-15 15:13:42 -07:00
arc.c
enforce arc_dnode_limit
2025-11-03 13:51:00 -08:00
blake3_zfs.c
blake3: fix up bogus checksums in face of cpu migration
2023-05-01 17:21:27 -07:00
blkptr.c
Remove bcopy(), bzero(), bcmp()
2022-03-15 15:13:42 -07:00
bplist.c
Use list_remove_head() where possible.
2023-06-09 10:12:52 -07:00
bpobj.c
Add explicit prefetches to bpobj_iterate().
2023-07-21 16:35:12 -07:00
bptree.c
Replace dead opensolaris.org license link
2022-07-11 14:16:13 -07:00
bqueue.c
Batch enqueue/dequeue for bqueue
2023-01-10 13:39:22 -08:00
brt.c
BRT: Skip getting length in brt_entry_lookup()
2024-04-19 10:13:38 -07:00
btree.c
Replace P2ALIGN with P2ALIGN_TYPED and delete P2ALIGN.
2024-05-13 10:27:38 -05:00
dataset_kstats.c
Fix null ptr deref when renaming a zvol with snaps and snapdev=visible (#16316)
2024-08-22 15:42:49 -07:00
dbuf_stats.c
Revert "Reduce dbuf_find() lock contention"
2022-09-22 12:59:41 -07:00
dbuf.c
Skip dbuf_evict_one() from dbuf_evict_notify() for reclaim thread
2025-10-16 17:03:47 -07:00
ddt_zap.c
Pack our DDT ZAPs a bit denser.
2023-06-30 09:42:02 -07:00
ddt.c
[zfs-2.2.8] GCC: Fix array subscript check
2025-05-27 15:49:12 -07:00
dmu_diff.c
Simplify issig().
2024-11-14 15:20:10 -08:00
dmu_object.c
Replace P2ALIGN with P2ALIGN_TYPED and delete P2ALIGN.
2024-05-13 10:27:38 -05:00
dmu_objset.c
cred: properly pass and test creds on other threads (#17273)
2025-06-02 16:49:51 -07:00
dmu_recv.c
cred: properly pass and test creds on other threads (#17273)
2025-06-02 16:49:51 -07:00
dmu_redact.c
Simplify issig().
2024-11-14 15:20:10 -08:00
dmu_send.c
Fix 2 bugs in non-raw send with encryption
2025-05-27 14:41:45 -07:00
dmu_traverse.c
Fix prefetching of indirect blocks while destroying
2023-03-24 10:20:07 -07:00
dmu_tx.c
Cleanup DB_DNODE() macros usage
2024-11-04 10:34:48 -08:00
dmu_zfetch.c
Add prefetch property
2024-04-30 10:01:15 -07:00
dmu.c
Reduce zfs_dmu_offset_next_sync penalty
2025-11-03 13:51:00 -08:00
dnode_sync.c
free_blocks(): Fix reports from 2016 PVS Studio FreeBSD report
2023-01-23 13:12:37 -08:00
dnode.c
dnode_next_offset: backtrack if lower level does not match
2025-10-21 11:31:06 -07:00
dsl_bookmark.c
nvpair: Constify string functions
2023-03-14 15:25:50 -07:00
dsl_crypt.c
Properly release key in spa_keystore_dsl_key_hold_dd()
2024-11-05 15:43:52 -08:00
dsl_dataset.c
cred: properly pass and test creds on other threads (#17273)
2025-06-02 16:49:51 -07:00
dsl_deadlist.c
Refactor dmu_prefetch().
2024-04-19 10:13:38 -07:00
dsl_deleg.c
Replace dead opensolaris.org license link
2022-07-11 14:16:13 -07:00
dsl_destroy.c
nvpair: Constify string functions
2023-03-14 15:25:50 -07:00
dsl_dir.c
cred: properly pass and test creds on other threads (#17273)
2025-06-02 16:49:51 -07:00
dsl_pool.c
Remove lock from dsl_pool_need_dirty_delay()
2023-11-06 16:46:55 -08:00
dsl_prop.c
nvpair: Constify string functions
2023-03-14 15:25:50 -07:00
dsl_scan.c
Fix scn_queue races on very old pools
2024-05-29 08:54:19 -07:00
dsl_synctask.c
Replace dead opensolaris.org license link
2022-07-11 14:16:13 -07:00
dsl_userhold.c
nvpair: Constify string functions
2023-03-14 15:25:50 -07:00
edonr_zfs.c
Remove unused Edon-R variants
2023-03-14 15:59:58 -07:00
fm.c
Use list_remove_head() where possible.
2023-06-09 10:12:52 -07:00
gzip.c
Replace dead opensolaris.org license link
2022-07-11 14:16:13 -07:00
hkdf.c
Remove bcopy(), bzero(), bcmp()
2022-03-15 15:13:42 -07:00
lz4_zfs.c
Linux: Report reclaimable memory to kernel as such (#16385)
2024-11-14 15:20:06 -08:00
lz4.c
lz4: Cherrypick fix for CVE-2021-3520
2022-01-12 16:14:36 -08:00
lzjb.c
Replace dead opensolaris.org license link
2022-07-11 14:16:13 -07:00
metaslab.c
Block remap for cloned blocks on device removal
2025-06-02 11:17:22 -07:00
mmp.c
vdev probe to slow disk can stall mmp write checker
2024-04-30 10:01:15 -07:00
multilist.c
L2ARC: Relax locking during write
2024-04-19 10:13:38 -07:00
objlist.c
Implement Redacted Send/Receive
2019-06-19 09:48:12 -07:00
pathname.c
Replace dead opensolaris.org license link
2022-07-11 14:16:13 -07:00
range_tree.c
btree: Implement faster binary search algorithm
2023-05-26 10:03:12 -07:00
refcount.c
Switch refcount tracking from lists to AVL-trees.
2023-06-14 08:02:27 -07:00
rrwlock.c
Replace dead opensolaris.org license link
2022-07-11 14:16:13 -07:00
sa.c
Linux: Report reclaimable memory to kernel as such (#16385)
2024-11-14 15:20:06 -08:00
sha2_zfs.c
Add generic implementation handling and SHA2 impl
2023-03-02 13:52:21 -08:00
skein_zfs.c
Remove bcopy(), bzero(), bcmp()
2022-03-15 15:13:42 -07:00
spa_checkpoint.c
Cleanup: 64-bit kernel module parameters should use fixed width types
2022-10-13 10:03:29 -07:00
spa_config.c
Add interface to interface spa_get_worst_case_min_alloc() function
2025-10-20 14:56:20 -07:00
spa_errlog.c
Update the MOS directory on spa_upgrade_errlog()
2023-09-19 08:51:00 -07:00
spa_history.c
nvpair: Constify string functions
2023-03-14 15:25:50 -07:00
spa_log_spacemap.c
Extend import_progress kstat with a notes field
2024-04-29 17:45:53 -07:00
spa_misc.c
Add interface to interface spa_get_worst_case_min_alloc() function
2025-10-20 14:56:20 -07:00
spa_stats.c
Cleanup: Specify unsignedness on things that should not be signed
2022-09-27 16:42:41 -07:00
spa.c
Some improvements to metaslabs eviction
2024-07-17 14:54:47 -07:00
space_map.c
Replace dead opensolaris.org license link
2022-07-11 14:16:13 -07:00
space_reftree.c
Replace dead opensolaris.org license link
2022-07-11 14:16:13 -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
vdev probe to slow disk can stall mmp write checker
2024-04-30 10:01:15 -07:00
uberblock.c
Replace dead opensolaris.org license link
2022-07-11 14:16:13 -07:00
unique.c
Replace dead opensolaris.org license link
2022-07-11 14:16:13 -07:00
vdev_draid_rand.c
Distributed Spare (dRAID) Feature
2020-11-13 13:51:51 -08:00
vdev_draid.c
nvpair: Constify string functions
2023-03-14 15:25:50 -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
Don't emit cksum_{actual_expected} in ereport.fs.zfs.checksum events
2023-07-21 16:35:12 -07:00
vdev_initialize.c
Add the ability to uninitialize
2023-05-18 10:02:20 -07:00
vdev_label.c
Add interface to interface spa_get_worst_case_min_alloc() function
2025-10-20 14:56:20 -07:00
vdev_mirror.c
Improve too large physical ashift handling
2022-09-08 10:30:53 -07:00
vdev_missing.c
Replace dead opensolaris.org license link
2022-07-11 14:16:13 -07:00
vdev_queue.c
Fix accounting error for pending sync IO ops in zpool iostat
2023-11-16 14:23:03 -08:00
vdev_raidz_math_aarch64_neon_common.h
Replace dead opensolaris.org license link
2022-07-11 14:16:13 -07:00
vdev_raidz_math_aarch64_neon.c
Replace dead opensolaris.org license link
2022-07-11 14:16:13 -07:00
vdev_raidz_math_aarch64_neonx2.c
Fix Clang 15 compilation errors
2022-11-30 13:46:26 -08:00
vdev_raidz_math_avx2.c
Replace dead opensolaris.org license link
2022-07-11 14:16:13 -07:00
vdev_raidz_math_avx512bw.c
Replace dead opensolaris.org license link
2022-07-11 14:16:13 -07:00
vdev_raidz_math_avx512f.c
Replace dead opensolaris.org license link
2022-07-11 14:16:13 -07:00
vdev_raidz_math_impl.h
Cleanup Raid-Z Typo fixes
2022-09-06 09:43:21 -07:00
vdev_raidz_math_powerpc_altivec_common.h
Linux ppc64le ieee128 compat: Do not redefine __asm on external headers
2023-01-13 10:58:58 -08:00
vdev_raidz_math_powerpc_altivec.c
Replace dead opensolaris.org license link
2022-07-11 14:16:13 -07:00
vdev_raidz_math_scalar.c
Replace dead opensolaris.org license link
2022-07-11 14:16:13 -07:00
vdev_raidz_math_sse2.c
Replace dead opensolaris.org license link
2022-07-11 14:16:13 -07:00
vdev_raidz_math_ssse3.c
Replace dead opensolaris.org license link
2022-07-11 14:16:13 -07:00
vdev_raidz_math.c
Miscellaneous FreBSD compilation bugfixes
2023-04-06 10:35:02 -07:00
vdev_raidz.c
GCC: Fixes for gcc 14 on Fedora 40
2024-04-29 13:50:05 -07:00
vdev_rebuild.c
Tweak rebuild in-flight hard limit
2023-10-03 09:06:07 -07:00
vdev_removal.c
nvpair: Constify string functions
2023-03-14 15:25:50 -07:00
vdev_root.c
Replace dead opensolaris.org license link
2022-07-11 14:16:13 -07:00
vdev_trim.c
Autotrim High Load Average Fix
2024-01-18 11:33:29 -08:00
vdev.c
Add interface to interface spa_get_worst_case_min_alloc() function
2025-10-20 14:56:20 -07:00
zap_leaf.c
ZAP: Some cleanups/micro-optimizations
2024-04-19 10:13:38 -07:00
zap_micro.c
ZAP: Massively switch to _by_dnode() interfaces
2024-04-19 10:13:38 -07:00
zap.c
ZAP: Fix leaf references on zap_expand_leaf() errors
2024-05-29 08:54:19 -07:00
zcp_get.c
nvpair: Constify string functions
2023-03-14 15:25:50 -07:00
zcp_global.c
OpenZFS 8600 - ZFS channel programs - snapshot
2018-02-08 15:29:24 -08:00
zcp_iter.c
nvpair: Constify string functions
2023-03-14 15:25:50 -07:00
zcp_set.c
Support setting user properties in a channel program
2020-02-14 13:41:42 -08:00
zcp_synctask.c
cred: properly pass and test creds on other threads (#17273)
2025-06-02 16:49:51 -07:00
zcp.c
cred: properly pass and test creds on other threads (#17273)
2025-06-02 16:49:51 -07:00
zfeature.c
Replace dead opensolaris.org license link
2022-07-11 14:16:13 -07:00
zfs_byteswap.c
Replace dead opensolaris.org license link
2022-07-11 14:16:13 -07:00
zfs_chksum.c
Add generic implementation handling and SHA2 impl
2023-03-02 13:52:21 -08:00
zfs_fm.c
Add slow disk diagnosis to ZED
2024-04-29 13:50:05 -07:00
zfs_fuid.c
Use list_remove_head() where possible.
2023-06-09 10:12:52 -07:00
zfs_impl.c
Add generic implementation handling and SHA2 impl
2023-03-02 13:52:21 -08:00
zfs_ioctl.c
Simplify issig().
2024-11-14 15:20:10 -08:00
zfs_log.c
zfs_log: add flex array fields to log record structs
2024-11-04 10:34:48 -08:00
zfs_onexit.c
Use list_remove_head() where possible.
2023-06-09 10:12:52 -07:00
zfs_quota.c
Implementation of block cloning for ZFS
2023-03-10 11:59:53 -08:00
zfs_ratelimit.c
Replace dead opensolaris.org license link
2022-07-11 14:16:13 -07:00
zfs_replay.c
FreeBSD: remove support for FreeBSD < 13.0-RELEASE (#16372)
2024-11-15 10:15:00 -08:00
zfs_rlock.c
Replace dead opensolaris.org license link
2022-07-11 14:16:13 -07:00
zfs_sa.c
Replace dead opensolaris.org license link
2022-07-11 14:16:13 -07:00
zfs_vnops.c
Simplify issig().
2024-11-14 15:20:10 -08:00
zfs_znode.c
zfs_znode: lift common code to a single shared file
2024-11-15 10:15:01 -08:00
zil.c
zfs: add bounds checking to zil_parse (#16308)
2024-08-22 15:12:54 -07:00
zio_checksum.c
ZIL: Assert record sizes in different places
2024-01-08 16:11:39 -08:00
zio_compress.c
Skip memory allocation when compressing holes
2023-02-27 14:41:02 -08:00
zio_inject.c
vdev probe to slow disk can stall mmp write checker
2024-04-30 10:01:15 -07:00
zio.c
Linux: Report reclaimable memory to kernel as such (#16385)
2024-11-14 15:20:06 -08:00
zle.c
Replace dead opensolaris.org license link
2022-07-11 14:16:13 -07:00
zrlock.c
Micro-optimize zrl_remove()
2022-11-29 09:26:03 -08:00
zthr.c
Switch from _Noreturn to __attribute__((noreturn))
2022-03-23 08:51:00 -07:00
zvol.c
zvol: ensure device minors are properly cleaned up
2024-11-15 10:14:50 -08:00