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Adam D. Moss edd23dba81 Add DB_RF_NOPREFETCH to dbuf_read()s in dnode.c 
Prefetching of dnodes in dbuf_read() can cause significant mutex
contention for some workloads and isn't very helpful.  This is
because we already get 32 dnodes for each block read, and when
iterating over a directory we prefetch the dnodes in the directory.
Disable this prefetching to prevent the lock contention.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Submitted-by: Adam Moss <c@yotes.com>
Submitted-by: Matthew Ahrens <mahrens@delphix.com>
Signed-off-by: Adam Moss <c@yotes.com>
Closes #10877
Closes #10953
 		2020-10-01 12:21:09 -07:00
..
Makefile.in Move spa_stats.c to common code 2020-08-30 14:19:08 -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
abd.c Add gang ABD child to parent gang ABD 2020-07-24 21:09:20 -07:00
aggsum.c Reduce number of atomic_add() calls in aggsum 2020-02-06 13:21:06 -08:00
arc.c vdev_ashift should only be set once 2020-09-18 12:40:20 -07:00
blkptr.c Add zstd support to zfs 2020-08-20 10:30:06 -07:00
bplist.c Fast Clone Deletion 2019-07-26 10:54:14 -07:00
bpobj.c Rename refcount.h to zfs_refcount.h 2020-07-29 16:35:33 -07:00
bptree.c Rename refcount.h to zfs_refcount.h 2020-07-29 16:35:33 -07:00
bqueue.c Implement Redacted Send/Receive 2019-06-19 09:48:12 -07:00
btree.c Fix typo in btree.c 2020-08-17 15:25:37 -07:00
dataset_kstats.c Fix panic on DilOS with kstat per dataset statistics 2019-09-03 12:12:31 -07:00
dbuf.c Replace cv_{timed}wait_sig with cv_{timed}wait_idle where appropriate 2020-09-09 10:21:01 -07:00
dbuf_stats.c Mark functions as static 2020-06-18 12:20:38 -07:00
ddt.c Remove dead code 2020-06-18 12:21:18 -07:00
ddt_zap.c Refactor dnode dirty context from dbuf_dirty 2020-02-26 16:09:17 -08:00
dmu.c Export dmu_offset_next() symbol 2020-08-25 08:34:41 -07:00
dmu_diff.c Mark write_record static 2019-12-03 09:51:44 -08:00
dmu_object.c Add include files for prototypes 2020-06-18 12:21:25 -07:00
dmu_objset.c Add zstd support to zfs 2020-08-20 10:30:06 -07:00
dmu_recv.c Add zstd support to zfs 2020-08-20 10:30:06 -07:00
dmu_redact.c dmu_redact_snap: fix possible memleak 2020-09-18 12:37:39 -07:00
dmu_send.c Don't set numobjs to UINT64_MAX or near it 2020-10-01 12:18:38 -07:00
dmu_traverse.c Make module tunables cross platform 2019-09-05 14:49:49 -07:00
dmu_tx.c Refactor dnode dirty context from dbuf_dirty 2020-02-26 16:09:17 -08:00
dmu_zfetch.c Make module tunables cross platform 2019-09-05 14:49:49 -07:00
dnode.c Add DB_RF_NOPREFETCH to dbuf_read()s in dnode.c 2020-10-01 12:21:09 -07:00
dnode_sync.c dnode_sync is careless with range tree 2020-08-27 16:07:05 -07:00
dsl_bookmark.c Fix typos 2020-06-09 21:24:09 -07:00
dsl_crypt.c Prune dead branch reported by Coverity 2020-10-01 12:20:16 -07:00
dsl_dataset.c Add zstd support to zfs 2020-08-20 10:30:06 -07:00
dsl_deadlist.c Fix i/o error handling of livelists and zap iteration 2020-08-05 10:22:09 -07:00
dsl_deleg.c Reduce loaded range tree memory usage 2019-10-09 10:36:03 -07:00
dsl_destroy.c Fix i/o error handling of livelists and zap iteration 2020-08-05 10:22:09 -07:00
dsl_dir.c Add 'zfs rename -u' to rename without remounting 2020-09-03 16:16:15 -07:00
dsl_pool.c Mark functions as static 2020-06-18 12:20:38 -07:00
dsl_prop.c Replace sprintf()->snprintf() and strcpy()->strlcpy() 2020-06-07 11:42:12 -07:00
dsl_scan.c Sequential scrub and resilver updated comments 2020-09-09 10:26:00 -07:00
dsl_synctask.c nowait synctask must succeed 2020-09-09 10:25:59 -07:00
dsl_userhold.c Replace sprintf()->snprintf() and strcpy()->strlcpy() 2020-06-07 11:42:12 -07:00
edonr_zfs.c Add include files for prototypes 2020-06-18 12:21:25 -07:00
fm.c Avoid posting duplicate zpool events 2020-09-09 10:26:00 -07:00
gzip.c Add include files for prototypes 2020-06-18 12:21:25 -07:00
hkdf.c Encryption patch follow-up 2017-10-11 16:54:48 -04:00
lz4.c Prefix zfs internal endian checks with _ZFS 2020-07-28 13:02:49 -07:00
lzjb.c Add include files for prototypes 2020-06-18 12:21:25 -07:00
metaslab.c Sequential scrub and resilver updated comments 2020-09-09 10:26:00 -07:00
mmp.c Initialize mmp_last_write when the mmp thread starts 2020-09-09 10:26:04 -07:00
multilist.c Make use of ZFS_DEBUG consistent within kmod sources 2020-07-25 20:07:44 -07:00
objlist.c Implement Redacted Send/Receive 2019-06-19 09:48:12 -07:00
pathname.c Disable unused pathname::pn_path* (unneeded in Linux) 2019-07-15 13:57:56 -07:00
range_tree.c Sequential scrub and resilver updated comments 2020-09-09 10:26:00 -07:00
refcount.c Rename refcount.h to zfs_refcount.h 2020-07-29 16:35:33 -07:00
rrwlock.c Rename refcount.h to zfs_refcount.h 2020-07-29 16:35:33 -07:00
sa.c Remove duplicate dnode.h include 2020-08-27 16:06:52 -07:00
sha256.c Add include files for prototypes 2020-06-18 12:21:25 -07:00
skein_zfs.c Add include files for prototypes 2020-06-18 12:21:25 -07:00
spa.c vdev_ashift should only be set once 2020-09-18 12:40:20 -07:00
spa_boot.c Add include files for prototypes 2020-06-18 12:21:25 -07:00
spa_checkpoint.c Refactor dnode dirty context from dbuf_dirty 2020-02-26 16:09:17 -08:00
spa_config.c vdev_ashift should only be set once 2020-09-18 12:40:20 -07:00
spa_errlog.c Fix typos in module/zfs/ 2019-09-02 17:56:41 -07:00
spa_history.c nowait synctask must succeed 2020-09-09 10:25:59 -07:00
spa_log_spacemap.c Make module tunables cross platform 2019-09-05 14:49:49 -07:00
spa_misc.c FreeBSD: Add support for procfs_list 2020-10-01 12:18:56 -07:00
spa_stats.c FreeBSD: Add support for procfs_list 2020-10-01 12:18:56 -07:00
space_map.c Rename refcount.h to zfs_refcount.h 2020-07-29 16:35:33 -07:00
space_reftree.c Reduce loaded range tree memory usage 2019-10-09 10:36:03 -07:00
txg.c Replace cv_{timed}wait_sig with cv_{timed}wait_idle where appropriate 2020-09-09 10:21:01 -07:00
uberblock.c MMP interval and fail_intervals in uberblock 2019-03-21 12:47:57 -07:00
unique.c Reduce loaded range tree memory usage 2019-10-09 10:36:03 -07:00
vdev.c vdev_ashift should only be set once 2020-09-18 12:40:20 -07:00
vdev_cache.c Replace ASSERTV macro with compiler annotation 2019-12-05 12:37:00 -08:00
vdev_indirect.c Avoid posting duplicate zpool events 2020-09-09 10:26:00 -07:00
vdev_indirect_births.c Fixes: #8934 Large kmem_alloc 2019-07-10 15:54:49 -07:00
vdev_indirect_mapping.c Replace ASSERTV macro with compiler annotation 2019-12-05 12:37:00 -08:00
vdev_initialize.c nowait synctask must succeed 2020-09-09 10:25:59 -07:00
vdev_label.c zfs label bootenv should store data as nvlist 2020-09-15 18:36:12 -07:00
vdev_mirror.c vdev_ashift should only be set once 2020-09-18 12:40:20 -07:00
vdev_missing.c Import vdev ashift optimization from FreeBSD 2020-08-21 12:53:17 -07:00
vdev_queue.c Add device rebuild feature 2020-07-03 11:05:50 -07:00
vdev_raidz.c Avoid posting duplicate zpool events 2020-09-09 10:26:00 -07:00
vdev_raidz_math.c FreeBSD: disable neon usage 2020-08-27 16:06:35 -07:00
vdev_raidz_math_aarch64_neon.c Linux 5.0 compat: SIMD compatibility 2019-07-12 09:31:20 -07:00
vdev_raidz_math_aarch64_neon_common.h FreeBSD: fix the build with Clang 11 2020-08-17 15:40:17 -07:00
vdev_raidz_math_aarch64_neonx2.c Linux 5.0 compat: SIMD compatibility 2019-07-12 09:31:20 -07:00
vdev_raidz_math_avx2.c FreeBSD: fix the build with Clang 11 2020-08-17 15:40:17 -07:00
vdev_raidz_math_avx512bw.c Refactor ccompile.h to not include system headers 2020-07-25 20:09:50 -07:00
vdev_raidz_math_avx512f.c FreeBSD: fix the build with Clang 11 2020-08-17 15:40:17 -07:00
vdev_raidz_math_impl.h Fix const-correctness in raidz math 2020-02-03 10:52:41 -08:00
vdev_raidz_math_powerpc_altivec.c Prefix zfs internal endian checks with _ZFS 2020-07-28 13:02:49 -07:00
vdev_raidz_math_powerpc_altivec_common.h FreeBSD: fix the build with Clang 11 2020-08-17 15:40:17 -07:00
vdev_raidz_math_scalar.c Linux 5.3: Fix switch() fall though compiler errors 2019-08-21 09:29:23 -07:00
vdev_raidz_math_sse2.c FreeBSD: fix the build with Clang 11 2020-08-17 15:40:17 -07:00
vdev_raidz_math_ssse3.c Refactor ccompile.h to not include system headers 2020-07-25 20:09:50 -07:00
vdev_rebuild.c nowait synctask must succeed 2020-09-09 10:25:59 -07:00
vdev_removal.c nowait synctask must succeed 2020-09-09 10:25:59 -07:00
vdev_root.c Import vdev ashift optimization from FreeBSD 2020-08-21 12:53:17 -07:00
vdev_trim.c nowait synctask must succeed 2020-09-09 10:25:59 -07:00
zap.c Rename refcount.h to zfs_refcount.h 2020-07-29 16:35:33 -07:00
zap_leaf.c Refactor dnode dirty context from dbuf_dirty 2020-02-26 16:09:17 -08:00
zap_micro.c Rename refcount.h to zfs_refcount.h 2020-07-29 16:35:33 -07:00
zcp.c filesystem_limit/snapshot_limit is incorrectly enforced against root 2020-07-11 17:18:02 -07:00
zcp_get.c Add include files for prototypes 2020-06-18 12:21:25 -07:00
zcp_global.c OpenZFS 8600 - ZFS channel programs - snapshot 2018-02-08 15:29:24 -08:00
zcp_iter.c Fix typos in module/zfs/ 2019-09-02 17:56:41 -07:00
zcp_set.c Support setting user properties in a channel program 2020-02-14 13:41:42 -08:00
zcp_synctask.c filesystem_limit/snapshot_limit is incorrectly enforced against root 2020-07-11 17:18:02 -07:00
zfeature.c Replace ASSERTV macro with compiler annotation 2019-12-05 12:37:00 -08:00
zfs_byteswap.c Mark functions as static 2020-06-18 12:20:38 -07:00
zfs_fm.c Avoid posting duplicate zpool events 2020-09-09 10:26:00 -07:00
zfs_fuid.c FreeBSD: Fix UNIX permissions checking 2020-08-18 09:57:07 -07:00
zfs_ioctl.c zfs label bootenv should store data as nvlist 2020-09-15 18:36:12 -07:00
zfs_log.c zfs_log_write: simplify data copying code for WR_COPIED records 2020-10-01 12:20:00 -07:00
zfs_onexit.c Remove deduplicated send/receive code 2020-04-23 10:06:57 -07:00
zfs_quota.c File incorrectly zeroed when receiving incremental stream that toggles -L 2020-06-09 10:41:01 -07:00
zfs_ratelimit.c Change checksum & IO delay ratelimit values 2018-03-04 17:34:51 -08:00
zfs_replay.c Simplify FreeBSD's locking requirements in zfs_replay.c 2020-01-22 17:55:56 -08:00
zfs_rlock.c Add a "try" operation for range locks 2020-07-06 11:53:31 -07:00
zfs_sa.c Add convenience wrappers for common uio usage 2020-06-14 10:09:55 -07:00
zil.c Mark functions as static 2020-06-18 12:20:38 -07:00
zio.c Avoid posting duplicate zpool events 2020-09-09 10:26:00 -07:00
zio_checksum.c Mark functions as static 2020-06-18 12:20:38 -07:00
zio_compress.c Avoid symbol collision with in-kernel zstdlib 2020-08-24 12:20:41 -07:00
zio_inject.c Replace ASSERTV macro with compiler annotation 2019-12-05 12:37:00 -08:00
zle.c Add include files for prototypes 2020-06-18 12:21:25 -07:00
zrlock.c Remove dead code 2020-06-18 12:21:18 -07:00
zthr.c Retain thread name when resuming a zthr 2020-09-09 10:21:16 -07:00
zvol.c Fix typos 2020-06-09 21:24:09 -07:00