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505df8d133
mirror_zfs/module/zfs
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Brian Behlendorf 505df8d133 Dynamically size dbuf hash mutex array 
Incorrectly sizing the array of hash locks used to protect the
dbuf hash table can lead to contention and reduce performance.
We could unconditionally allocate a larger array for the locks
but it's wasteful, particularly for a low-memory system.
Instead, dynamically allocate the array of locks and scale
it based on total system memory.

Additionally, add a new `dbuf_mutex_cache_shift` module option
which can be used to override the hash lock array size.  This is
disabled by default (dbuf_mutex_hash_shift=0) and can only be
set at module load time.  The minimum target array size is set
to 8192, this matches the current constant value.

Note that the count of the dbuf hash table and count of the
mutex array were added to the /proc/spl/kstat/zfs/dbufstats
kstat.

Finally, this change removes the _KERNEL conditional checks.
These were not required since for the user space build there
is no difference between the kmem and vmem interfaces.

Reviewed-by: Ryan Moeller <ryan@iXsystems.com>
Reviewed-by: Richard Yao <richard.yao@alumni.stonybrook.edu>
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #13928
2022-09-22 12:59:56 -07:00
..
abd.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
aggsum.c Remove bcopy(), bzero(), bcmp() 2022-03-15 15:13:42 -07:00
arc.c Cleanup: Use OpenSolaris functions to call scheduler 2022-09-12 09:55:37 -07:00
blake3_zfs.c Fix memory allocation issue for BLAKE3 context 2022-06-21 14:32:09 -07:00
blkptr.c Remove bcopy(), bzero(), bcmp() 2022-03-15 15:13:42 -07:00
bplist.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
bpobj.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
bptree.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
bqueue.c zfs recv hangs if max recordsize is less than received recordsize 2022-09-16 13:52:25 -07:00
btree.c Add zfs_btree_verify_intensity kernel module parameter 2022-09-15 16:22:33 -07:00
dataset_kstats.c Add support for per dataset zil stats and use wmsum counters 2022-07-20 17:14:06 -07:00
dbuf_stats.c Revert "Reduce dbuf_find() lock contention" 2022-09-22 12:59:41 -07:00
dbuf.c Dynamically size dbuf hash mutex array 2022-09-22 12:59:56 -07:00
ddt_zap.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
ddt.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
dmu_diff.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
dmu_object.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
dmu_objset.c Revert "Avoid panic with recordsize > 128k, raw sending and no large_blocks" 2022-08-25 13:33:32 -07:00
dmu_recv.c Implement a new type of zfs receive: corrective receive (-c) 2022-07-28 15:52:46 -07:00
dmu_redact.c Fix incorrect size given to bqueue_enqueue() call in dmu_redact.c 2022-09-15 16:21:21 -07:00
dmu_send.c Revert "Avoid panic with recordsize > 128k, raw sending and no large_blocks" 2022-08-25 13:33:32 -07:00
dmu_traverse.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
dmu_tx.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
dmu_zfetch.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
dmu.c Implement a new type of zfs receive: corrective receive (-c) 2022-07-28 15:52:46 -07:00
dnode_sync.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
dnode.c Cleanup: Use OpenSolaris functions to call scheduler 2022-09-12 09:55:37 -07:00
dsl_bookmark.c Remaining {=> const} char|void *tag 2022-06-29 14:08:59 -07:00
dsl_crypt.c Fix zpool status in case of unloaded keys 2022-08-22 17:42:01 -07:00
dsl_dataset.c Add assertion to dsl_dataset_set_compression_sync 2022-09-14 12:50:03 -07:00
dsl_deadlist.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
dsl_deleg.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
dsl_destroy.c Prevent zevent list from consuming all of kernel memory 2022-08-22 12:36:22 -07:00
dsl_dir.c Add DD_FIELD string for snapshots_changed property 2022-09-02 13:33:50 -07:00
dsl_pool.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
dsl_prop.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
dsl_scan.c Cleanup: Change 1 used in bitshifts to 1ULL 2022-09-22 11:28:33 -07:00
dsl_synctask.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
dsl_userhold.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
edonr_zfs.c Remove bcopy(), bzero(), bcmp() 2022-03-15 15:13:42 -07:00
fm.c Cleanup: Use OpenSolaris functions to call scheduler 2022-09-12 09:55:37 -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 Updated the lz4 decompressor 2022-01-07 10:36:49 -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 Cleanup: Change 1 used in bitshifts to 1ULL 2022-09-22 11:28:33 -07:00
mmp.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
multilist.c Clean up CSTYLEDs 2022-01-26 11:38:52 -08:00
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 Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
refcount.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
rrwlock.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
sa.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
sha256.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
skein_zfs.c Remove bcopy(), bzero(), bcmp() 2022-03-15 15:13:42 -07:00
spa_checkpoint.c Fix usage of zed_log_msg() and zfs_panic_recover() 2022-09-19 17:32:18 -07:00
spa_config.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
spa_errlog.c Fix zpool status in case of unloaded keys 2022-08-22 17:42:01 -07:00
spa_history.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
spa_log_spacemap.c Cleanup: Use OpenSolaris functions to call scheduler 2022-09-12 09:55:37 -07:00
spa_misc.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
spa_stats.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
spa.c Cleanup dead spa_boot code 2022-09-13 16:40:10 -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 Replace dead opensolaris.org license link 2022-07-11 14:16:13 -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_cache.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 vdev_draid_lookup_map() should not iterate outside draid_maps 2022-09-12 12:51:17 -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 Remove bcopy(), bzero(), bcmp() 2022-03-15 15:13:42 -07:00
vdev_initialize.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
vdev_label.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -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 Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
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 Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
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 Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
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 Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
vdev_raidz.c Improve too large physical ashift handling 2022-09-08 10:30:53 -07:00
vdev_rebuild.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
vdev_removal.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
vdev_root.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
vdev_trim.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
vdev.c Improve too large physical ashift handling 2022-09-08 10:30:53 -07:00
zap_leaf.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zap_micro.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zap.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zcp_get.c Add snapshots_changed as property 2022-08-02 16:45:30 -07:00
zcp_global.c OpenZFS 8600 - ZFS channel programs - snapshot 2018-02-08 15:29:24 -08:00
zcp_iter.c module/*.ko: prune .data, global .rodata 2022-01-14 15:37:55 -08:00
zcp_set.c Support setting user properties in a channel program 2020-02-14 13:41:42 -08:00
zcp_synctask.c Add zfs.sync.snapshot_rename 2022-09-02 13:31:19 -07:00
zcp.c Remaining {=> const} char|void *tag 2022-06-29 14:08:59 -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 Fix BLAKE3 tuneable and module loading on Linux and FreeBSD 2022-09-16 14:25:53 -07:00
zfs_fm.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zfs_fuid.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zfs_ioctl.c Delay ZFS_PROP_SHARESMB property to handle it for encrypted raw receive 2022-09-20 15:19:05 -07:00
zfs_log.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zfs_onexit.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zfs_quota.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zfs_ratelimit.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zfs_replay.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
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 zfs_enter rework 2022-09-16 13:36:47 -07:00
zil.c Add support for per dataset zil stats and use wmsum counters 2022-07-20 17:14:06 -07:00
zio_checksum.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zio_compress.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zio_inject.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zio.c Implement a new type of zfs receive: corrective receive (-c) 2022-07-28 15:52:46 -07:00
zle.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zrlock.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zthr.c Switch from _Noreturn to __attribute__((noreturn)) 2022-03-23 08:51:00 -07:00
zvol.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00