mirror_zfs/include
Ameer Hamza 2f41b9d865 L2ARC: Implement persistent markers with consistent tail scanning
This commit introduces per-sublist persistent markers that eliminate
redundant tail scanning between L2ARC iterations, providing significant
CPU efficiency improvements. Markers are pre-allocated during device
initialization and properly cleaned up during device removal.

The implementation uses conditional behavior based on device capacity:
small devices (capacity < arc_c) retain original HEAD/TAIL scanning
based on ARC warmup state, while large devices (capacity >= arc_c)
use the persistent marker approach for optimal CPU efficiency.

Reviewed-by: Alexander Motin <alexander.motin@TrueNAS.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Ameer Hamza <ahamza@ixsystems.com>
Closes #18093
2026-02-04 10:06:47 -08:00
..
os Fix build for Linux 6.18 with PowerPC/RISC-V kernels. (#18145) 2026-02-02 14:16:10 -08:00
sys L2ARC: Implement persistent markers with consistent tail scanning 2026-02-04 10:06:47 -08:00
.gitignore OpenZFS restructuring - move platform specific sources 2019-09-06 11:26:26 -07:00
cityhash.h SPDX: license tags: MIT 2025-03-13 17:56:54 -07:00
libnvpair.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
libzdb.h libzdb: Initial breakout of libzdb 2024-02-05 10:00:41 -08:00
libzfs_core.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
libzfs.h libshare: fold into libzfs and reorg headers a little 2025-12-19 19:52:33 -08:00
libzfsbootenv.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
libzpool.h zfs_context: move vn_dumpdir to libzpool 2025-11-12 10:01:28 -08:00
libzutil.h libzutil: move NN_NUMBUF_SZ from zfs_context.h nearer to nicenum() 2025-11-12 10:02:29 -08:00
Makefile.am build: add SPDX license tags to build system files 2026-01-08 15:08:03 -08:00
zfeature_common.h Implement physical rewrites 2025-08-06 10:36:56 -07:00
zfs_comutil.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
zfs_crrd.h Add TXG timestamp database 2025-08-06 10:31:21 -07:00
zfs_deleg.h ZFS allow send:encrypted 2025-09-12 09:53:31 -07:00
zfs_fletcher.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
zfs_namecheck.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
zfs_prop.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
zfs_valstr.h events: include zio type in IO error reports 2025-05-30 10:29:29 -04:00