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2f41b9d86586c5bcf1db766c47b85b4507f5f4a4
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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
..
crypto
icp: remove global icp includes
2025-11-12 10:03:51 -08:00
fm
Detect a slow raidz child during reads
2025-09-10 15:25:03 -07:00
fs
Add snapshots_changed_nsecs dataset property
2026-01-06 09:36:20 -08:00
lua
SPDX: license tags: MIT
2025-03-13 17:56:54 -07:00
sysevent
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
zstd
SPDX: license tags: BSD-3-Clause
2025-03-13 17:56:50 -07:00
abd_impl.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
abd.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
aggsum.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
arc_impl.h
L2ARC: Implement persistent markers with consistent tail scanning
2026-02-04 10:06:47 -08:00
arc.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
asm_linkage.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
avl_impl.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
avl.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
bitmap.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
bitops.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
blake3.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
blkptr.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
bplist.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
bpobj.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
bptree.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
bqueue.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
brt_impl.h
BRT: Fix ranges to blocks conversion math
2025-11-10 13:58:39 -08:00
brt.h
Add BRT support to zpool prefetch command
2025-11-10 16:16:22 -08:00
btree.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
dataset_kstats.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
dbuf.h
Implement physical rewrites
2025-08-06 10:36:56 -07:00
ddt_impl.h
DDT: Switch to using ZAP _by_dnode() interfaces
2025-12-15 09:49:14 -08:00
ddt.h
DDT: Add locking for table ZAP destruction
2026-01-13 15:07:15 -08:00
dmu_impl.h
dnode: remove dn_dirtyctx and dnode_dirtycontext
2025-08-21 06:05:38 -07:00
dmu_objset.h
Relax special_small_blocks restrictions
2025-07-02 11:11:37 -07:00
dmu_recv.h
cred: properly pass and test creds on other threads (#17273)
2025-04-29 16:27:48 -07:00
dmu_redact.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
dmu_send.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
dmu_traverse.h
Allow physical rewrite without logical
2025-08-06 10:36:07 -07:00
dmu_tx.h
dmu_tx: break tx assign/wait when pool suspends
2025-05-28 10:28:51 -07:00
dmu_zfetch.h
Wire O_DIRECT also to Uncached I/O (#17218)
2025-05-13 14:26:55 -07:00
dmu.h
Fix caching of DDT log and BRT
2025-10-30 16:28:28 -07:00
dnode.h
dnode: remove dn_dirtyctx and dnode_dirtycontext
2025-08-21 06:05:38 -07:00
dsl_bookmark.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
dsl_crypt.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
dsl_dataset.h
dsl_dataset: rename dmu_objset_clone* to dsl_dataset_clone*
2025-06-10 14:52:43 -07:00
dsl_deadlist.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
dsl_deleg.h
ZFS allow send:encrypted
2025-09-12 09:53:31 -07:00
dsl_destroy.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
dsl_dir.h
cred: properly pass and test creds on other threads (#17273)
2025-04-29 16:27:48 -07:00
dsl_pool.h
Unified allocation throttling (#17020)
2025-03-24 09:25:01 -07:00
dsl_prop.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
dsl_scan.h
Improve async destroy processing timing
2025-12-11 18:46:08 -08:00
dsl_synctask.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
dsl_userhold.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
edonr.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
efi_partition.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
frame.h
Linux build: silence objtool warnings
2025-06-04 17:40:09 -07:00
hkdf.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
metaslab_impl.h
range_tree: Provide more debug details upon unexpected add/remove
2025-07-31 10:44:42 -04:00
metaslab.h
metaslab: don't pass whole zio to throttle reserve APIs
2025-07-04 23:22:22 -04:00
mmp.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
mntent.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
multilist.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
nvpair_impl.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
nvpair.h
nvlist: Add nvlist_snprintf() and zfs_dbgmsg_nvlist()
2025-04-18 09:22:16 -04:00
objlist.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
pathname.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
qat.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
range_tree.h
range_tree: drop duplicate zfs_ prefix from rs_set_fill_raw
2025-09-29 16:38:52 -07:00
rrwlock.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
sa_impl.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
sa.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
sha2.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
skein.h
SPDX: license tags: LicenseRef-OpenZFS-ThirdParty-PublicDomain
2025-03-13 17:57:31 -07:00
spa_checkpoint.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
spa_checksum.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
spa_impl.h
L2ARC: Implement persistent markers with consistent tail scanning
2026-02-04 10:06:47 -08:00
spa_log_spacemap.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
spa.h
Rename several printf attributes declarations to __printf__
2026-01-05 14:15:22 -08:00
space_map.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
space_reftree.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
sysevent.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
txg_impl.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
txg.h
txg_wait_synced_flags: add TXG_WAIT_SUSPEND flag to not wait if pool suspended
2025-05-28 10:27:46 -07:00
u8_textprep_data.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
u8_textprep.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
uberblock_impl.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
uberblock.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
uio_impl.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
unique.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
uuid.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
vdev_disk.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
vdev_draid.h
Implement allocation size ranges and use for gang leaves (#17111)
2025-05-02 15:32:18 -07:00
vdev_file.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
vdev_impl.h
Add knob to disable slow io notifications
2025-11-11 10:42:17 -08:00
vdev_indirect_births.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
vdev_indirect_mapping.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
vdev_initialize.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
vdev_raidz_impl.h
Detect a slow raidz child during reads
2025-09-10 15:25:03 -07:00
vdev_raidz.h
Detect a slow raidz child during reads
2025-09-10 15:25:03 -07:00
vdev_rebuild.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
vdev_removal.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
vdev_trim.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
vdev.h
Rename several printf attributes declarations to __printf__
2026-01-05 14:15:22 -08:00
xvattr.h
Add support for FreeBSD's Solaris style extended attribute interface
2025-07-30 09:49:43 -07:00
zap_impl.h
DDT: Add/use zap_lookup_length_uint64_by_dnode()
2025-12-15 14:38:34 -08:00
zap_leaf.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
zap.h
DDT: Add/use zap_lookup_length_uint64_by_dnode()
2025-12-15 14:38:34 -08:00
zcp_global.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
zcp_iter.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
zcp_prop.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
zcp_set.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
zcp.h
cred: properly pass and test creds on other threads (#17273)
2025-04-29 16:27:48 -07:00
zfeature.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
zfs_acl.h
libspl: move vattr and xvattr definitions from zfs_context.h
2025-11-12 10:00:24 -08:00
zfs_bootenv.h
libzpool: add BE_POSIX_VENDOR for userspace bootenv
2025-11-12 10:03:07 -08:00
zfs_chksum.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
zfs_context.h
zfs_context: remove duplicate includes
2025-11-12 10:04:03 -08:00
zfs_debug.h
Rename several printf attributes declarations to __printf__
2026-01-05 14:15:22 -08:00
zfs_delay.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
zfs_file.h
Ensure 64-bit off_t is used in user space instead of loff_t
2025-12-10 09:45:39 -08:00
zfs_fuid.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
zfs_impl.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
zfs_ioctl_impl.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
zfs_ioctl.h
zinject: Introduce ready delay fault injection
2025-10-01 12:17:13 -07:00
zfs_onexit.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
zfs_project.h
Linux 6.17 compat: Fix broken projectquota on 6.17
2025-11-05 16:22:03 -08:00
zfs_quota.h
Show default quotas in zfs userspace tools
2025-04-03 10:36:45 -07:00
zfs_racct.h
Wire O_DIRECT also to Uncached I/O (#17218)
2025-05-13 14:26:55 -07:00
zfs_ratelimit.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
zfs_refcount.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
zfs_rlock.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
zfs_sa.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
zfs_stat.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
zfs_sysfs.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
zfs_vfsops.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
zfs_vnops.h
Introduce zfs rewrite subcommand (#17246)
2025-05-12 10:22:17 -07:00
zfs_znode.h
Prefer VERIFY0(n) over VERIFY(n == 0)
2025-08-07 11:40:59 -07:00
zil_impl.h
ZIL: Make allocations more flexible
2025-08-14 08:50:17 -07:00
zil.h
ZIL: add zil_commit_flags() to make honouring failmode= optional
2025-08-08 16:43:33 -07:00
zio_checksum.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
zio_compress.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
zio_crypt.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
zio_impl.h
ZIO: ZIO_STAGE_DDT_WRITE is a blocking stage
2025-12-10 19:51:53 -05:00
zio.h
zinject: Introduce ready delay fault injection
2025-10-01 12:17:13 -07:00
zrlock.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
zthr.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
zvol_impl.h
zvol_remove_minors_impl: remove all async fallbacks
2025-08-19 10:06:47 -07:00
zvol.h
zvol: reject suspend attempts when zvol is shutting down
2025-09-03 11:13:09 -07:00