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Matthew Ahrens 4e1d1b4b92 assertion failed in arc_wait_for_eviction() 
If the system is very low on memory (specifically,
`arc_free_memory() < arc_sys_free/2`, i.e. less than 1/16th of RAM
free), `arc_evict_state_impl()` will defer wakups.  In this case, the
arc_evict_waiter_t's remain on the list, even though `arc_evict_count`
has been incremented past their `aew_count`.

The problem is that `arc_wait_for_eviction()` assumes that if there are
waiters on the list, the count they are waiting for has not yet been
reached.  However, the deferred wakeups may violate this, causing
`ASSERT(last->aew_count > arc_evict_count)` to fail.

This commit resolves the issue by having new waiters use the greater of
`arc_evict_count` and the last `aew_count`.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: George Wilson <gwilson@delphix.com>
Reviewed-by: George Amanakis <gamanakis@gmail.com>
Signed-off-by: Matthew Ahrens <mahrens@delphix.com>
Closes #11285
Closes #11397
2021-01-23 15:47:06 -08:00
..
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
assertion failed in arc_wait_for_eviction()
2021-01-23 15:47:06 -08:00
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_stats.c
Eliminate gratuitous bzeroing in dbuf_stats_hash_table_data
2020-10-01 12:22:54 -07:00
dbuf.c
Replace cv_{timed}wait_sig with cv_{timed}wait_idle where appropriate
2020-09-09 10:21:01 -07:00
ddt_zap.c
Refactor dnode dirty context from dbuf_dirty
2020-02-26 16:09:17 -08:00
ddt.c
Remove dead code
2020-06-18 12:21:18 -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
implicit conversion from 'boolean_t' to 'ds_hold_flags_t'
2021-01-05 10:30:19 -08:00
dmu_recv.c
implicit conversion from 'boolean_t' to 'ds_hold_flags_t'
2021-01-05 10:30:19 -08:00
dmu_redact.c
Fix dnode refcount tracking
2020-11-11 11:03:24 -08:00
dmu_send.c
implicit conversion from 'boolean_t' to 'ds_hold_flags_t'
2021-01-05 10:30:19 -08:00
dmu_traverse.c
zil_parse: make callback parameters const
2020-10-16 13:01:53 -07:00
dmu_tx.c
Refactor dnode dirty context from dbuf_dirty
2020-02-26 16:09:17 -08:00
dmu_zfetch.c
Expose zfetch_max_idistance tunable
2020-10-16 13:02:39 -07:00
dmu.c
Export dmu_offset_next() symbol
2020-08-25 08:34:41 -07:00
dnode_sync.c
dnode_sync is careless with range tree
2020-08-27 16:07:05 -07:00
dnode.c
Add DB_RF_NOPREFETCH to dbuf_read()s in dnode.c
2020-10-01 12:21:09 -07:00
dsl_bookmark.c
Fix kernel panic induced by redacted send
2020-12-23 14:34:59 -08:00
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
Update references to nonexistent man pages in code
2020-10-30 16:04:41 -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
Makefile.in
Share zfs_fsync, zfs_read, zfs_write, et al between Linux and FreeBSD
2020-12-23 14:34:59 -08:00
metaslab.c
Update references to nonexistent man pages in code
2020-10-30 16:04:41 -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
Replace ZFS on Linux references with OpenZFS
2020-10-16 13:01:24 -07:00
range_tree.c
Fix incorrect deletion order in range_tree_add_impl gap case
2020-10-16 13:05:23 -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_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
Update references to nonexistent man pages in code
2020-10-30 16:04:41 -07:00
spa_log_spacemap.c
Make module tunables cross platform
2019-09-05 14:49:49 -07:00
spa_misc.c
special device removal space accounting fixes
2020-12-23 14:34:59 -08:00
spa_stats.c
FreeBSD: Add support for procfs_list
2020-10-01 12:18:56 -07:00
spa.c
FreeBSD: notify userspace when a vdev is removed
2020-12-23 13:08:12 -08:00
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
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 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_cache.c
Replace ASSERTV macro with compiler annotation
2019-12-05 12:37:00 -08:00
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_indirect.c
Fix reporting of CKSUM errors in indirect vdevs
2020-12-23 14:34:59 -08:00
vdev_initialize.c
nowait synctask must succeed
2020-09-09 10:25:59 -07:00
vdev_label.c
Replace ZFS on Linux references with OpenZFS
2020-10-16 13:01:24 -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
Fix for "Reduce latency effects of non-interactive I/O"
2020-12-23 13:09:17 -08:00
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_neon.c
Linux 5.0 compat: SIMD compatibility
2019-07-12 09:31:20 -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_common.h
FreeBSD: fix the build with Clang 11
2020-08-17 15:40:17 -07:00
vdev_raidz_math_powerpc_altivec.c
Prefix zfs internal endian checks with _ZFS
2020-07-28 13:02:49 -07:00
vdev_raidz_math_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_raidz_math.c
Reduce fletcher4 and raidz benchmark times
2020-12-23 14:34:59 -08:00
vdev_raidz.c
Avoid posting duplicate zpool events
2020-09-09 10:26:00 -07:00
vdev_rebuild.c
nowait synctask must succeed
2020-09-09 10:25:59 -07:00
vdev_removal.c
special device removal space accounting fixes
2020-12-23 14:34:59 -08:00
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
vdev.c
Correct missing zil_claim() DTL updates
2020-11-22 10:01:43 -08:00
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
zap.c
Rename refcount.h to zfs_refcount.h
2020-07-29 16:35:33 -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
zcp.c
Channel program may spuriously fail with "memory limit exhausted"
2020-11-12 09:02:00 -08:00
zfeature.c
Throw const on some strings
2020-10-16 12:55:56 -07:00
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
Fix optional "force" arg handing in zfs_ioc_pool_sync()
2020-12-23 14:34:59 -08:00
zfs_log.c
Throw const on some strings
2020-10-16 12:55:56 -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
zfs_vnops.c
Linux 5.10 compat: use iov_iter in uio structure
2020-12-23 14:35:39 -08:00
zil.c
zil_parse: make callback parameters const
2020-10-16 13:01:53 -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
zio.c
G/C data_alloc_arena
2020-11-11 18:46:22 -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 problems in zvol_set_volmode_impl
2020-11-17 12:20:09 -08:00