Alexander Motin 66ec7fb269 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		2025-06-11 11:50:49 -07:00
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avl	SPDX: license tags: CDDL-1.0	2025-03-13 17:56:27 -07:00
icp	Linux build: silence objtool warnings	2025-06-04 17:40:09 -07:00
lua	SPDX: license tags: MIT	2025-03-13 17:56:54 -07:00
nvpair	nvlist: Add nvlist_snprintf() and zfs_dbgmsg_nvlist()	2025-04-18 09:22:16 -04:00
os	zpl: handle suspend from two remaining calls to txg_wait_synced()	2025-06-05 15:38:26 -04:00
unicode	SPDX: license tags: CDDL-1.0	2025-03-13 17:56:27 -07:00
zcommon	events: include zio type in IO error reports	2025-05-30 10:29:29 -04:00
zfs	Reduce zfs_dmu_offset_next_sync penalty	2025-06-11 11:50:49 -07:00
zstd	SPDX: license tags: BSD-3-Clause OR GPL-2.0-only	2025-03-13 17:57:17 -07:00
.gitignore	FreeBSD: Ignore symlink to i386 includes	2022-08-02 16:34:23 -07:00
Kbuild.in	Linux build: always use objtool	2025-05-29 18:04:20 -07:00
Makefile.bsd	freebsd: unbreak module/Makefile.bsd build on 15-CURRENT-arm64	2025-04-05 19:43:41 -04:00
Makefile.in	Fix "make install" with DESTDIR set (#16995)	2025-02-07 16:38:58 -08:00