Alexander Motin a41ef36858 DDT: Reduce global DDT lock scope during writes ... Before this change DDT lock was taken 4 times per written block, and as effectively a pool-wide lock it can be highly congested. This change introduces a new per-entry dde_io_lock, protecting some fields during I/O ready and done stages, so that we don't need the global lock there. According to my write tests on 64-thread system with 4KB blocks this significantly reduce the global lock contention, reducing CPU usage from 100% to expected ~80%, and increasing write throughput by 10%. Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Reviewed-by: Rob Norris <robn@despairlabs.com> Signed-off-by: Alexander Motin <alexander.motin@TrueNAS.com> Closes #17960		2025-12-10 10:21:29 -08:00
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avl	Prefer VERIFY0P(n) over VERIFY(n == NULL)	2025-08-07 11:41:37 -07:00
icp	sha256_generic: make internal functions a little more private	2025-10-21 09:50:43 -07:00
lua	SPDX: license tags: MIT	2025-03-13 17:56:54 -07:00
nvpair	Prefer VERIFY0P(n) over VERIFY3P(n, ==, NULL)	2025-08-07 11:41:42 -07:00
os	spa_misc: add an API for spa_namespace_lock	2025-11-12 13:06:54 -08:00
unicode	SPDX: license tags: CDDL-1.0	2025-03-13 17:56:27 -07:00
zcommon	Add knob to disable slow io notifications	2025-11-12 13:07:14 -08:00
zfs	DDT: Reduce global DDT lock scope during writes	2025-12-10 10:21:29 -08:00
zstd	zstd: disable intrinsics	2025-11-12 13:06:22 -08:00
.gitignore	FreeBSD: Ignore symlink to i386 includes	2022-08-02 16:34:23 -07:00
Kbuild.in	Linux: bump -std to gnu11	2025-12-10 10:21:29 -08:00
Makefile.bsd	zstd: disable intrinsics	2025-11-12 13:06:22 -08:00
Makefile.in	objtool wrapper: use absolute path to call the wrapper	2025-07-14 15:10:02 -07:00