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mirror_zfs/include/sys
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Mark Johnston 6e2a59181e
Avoid memory allocations in the ARC eviction thread 
When the eviction thread goes to shrink an ARC state, it allocates a set
of marker buffers used to hold its place in the state's sublists.

This can be problematic in low memory conditions, since
1) the allocation can be substantial, as we allocate NCPU markers;
2) on at least FreeBSD, page reclamation can block in
   arc_wait_for_eviction()

In particular, in stress tests it's possible to hit a deadlock on
FreeBSD when the number of free pages is very low, wherein the system is
waiting for the page daemon to reclaim memory, the page daemon is
waiting for the ARC eviction thread to finish, and the ARC eviction
thread is blocked waiting for more memory.

Try to reduce the likelihood of such deadlocks by pre-allocating markers
for the eviction thread at ARC initialization time.  When evicting
buffers from an ARC state, check to see if the current thread is the ARC
eviction thread, and use the pre-allocated markers for that purpose
rather than dynamically allocating them.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Reviewed-by: George Amanakis <gamanakis@gmail.com>
Signed-off-by: Mark Johnston <markj@FreeBSD.org>
Closes #12985
2022-01-21 10:28:13 -08:00
..
crypto module/*.ko: prune .data, global .rodata 2022-01-14 15:37:55 -08:00
fm Upstream: Add snapshot and zvol events 2021-09-09 10:44:21 -07:00
fs module/*.ko: prune .data, global .rodata 2022-01-14 15:37:55 -08:00
lua FreeBSD: Reduce stack usage of Lua 2020-09-22 16:03:11 -07:00
sysevent Avoid installing kernel headers on FreeBSD 2020-06-27 17:40:14 -07:00
zstd Update checkstyle workflow env to ubuntu-20.04 2021-11-02 14:02:57 -06:00
abd_impl.h Avoid small buffer copying on write 2021-07-27 16:05:47 -07:00
abd.h Avoid small buffer copying on write 2021-07-27 16:05:47 -07:00
aggsum.h More aggsum optimizations 2021-06-07 09:02:47 -07:00
arc_impl.h Remove b_pabd/b_rabd allocation from arc_hdr_alloc() 2021-08-17 10:15:54 -06:00
arc.h include: sys/arc.h: shim out arc_referenced() 2021-12-23 09:36:26 -08:00
avl_impl.h Remove avl_size field from struct avl_tree 2021-07-01 09:32:31 -06:00
avl.h lib{efi,avl,share,tpool,zfs_core,zfsbootenv,zutil}: -fvisibility=hidden 2021-06-09 17:04:32 -07:00
bitops.h Remove NOTE(CONSTCOND) and note.h 2021-07-26 12:07:53 -07:00
blkptr.h OpenZFS 8067 - zdb should be able to dump literal embedded block pointer 2017-07-07 11:28:01 -07:00
bplist.h Fast Clone Deletion 2019-07-26 10:54:14 -07:00
bpobj.h Fast Clone Deletion 2019-07-26 10:54:14 -07:00
bptree.h Illumos 4914 - zfs on-disk bookmark structure should be named *_phys_t 2014-08-06 14:48:41 -07:00
bqueue.h Implement Redacted Send/Receive 2019-06-19 09:48:12 -07:00
btree.h Fix typos 2020-06-09 21:24:09 -07:00
dataset_kstats.h Introduce write-mostly sums 2021-05-27 14:27:29 -06:00
dbuf.h Introduce a tunable to exclude special class buffers from L2ARC 2021-11-11 12:52:16 -08:00
ddt.h Appease GCC sprintf warnings found on Fedora 32/GCC 10.0.1 2020-08-24 10:32:59 -07:00
dmu_impl.h Remove UIO_ZEROCOPY functions structures 2020-10-30 10:00:33 -07:00
dmu_objset.h Introduce a tunable to exclude special class buffers from L2ARC 2021-11-11 12:52:16 -08:00
dmu_recv.h module/*.ko: prune .data, global .rodata 2022-01-14 15:37:55 -08:00
dmu_redact.h Suppress cppcheck invalidSyntax warninigs 2021-03-05 17:56:35 -08:00
dmu_send.h Removed duplicated includes 2021-03-22 12:34:58 -07:00
dmu_traverse.h Implement Redacted Send/Receive 2019-06-19 09:48:12 -07:00
dmu_tx.h Add Module Parameter Regarding Log Size Limit 2021-07-20 09:40:24 -06:00
dmu_zfetch.h Split dmu_zfetch() speculation and execution parts 2021-03-19 22:56:11 -07:00
dmu.h module/*.ko: prune .data, global .rodata 2022-01-14 15:37:55 -08:00
dnode.h Fix lseek(SEEK_DATA/SEEK_HOLE) mmap consistency 2021-11-07 14:27:44 -07:00
dsl_bookmark.h Rename refcount.h to zfs_refcount.h 2020-07-29 16:35:33 -07:00
dsl_crypt.h dmu_objset_from_ds must be called with dp_config_rwlock held 2020-03-12 10:55:02 -07:00
dsl_dataset.h module/*.ko: prune .data, global .rodata 2022-01-14 15:37:55 -08:00
dsl_deadlist.h Add fast path for zfs_ioc_space_snaps() handling of empty_bpobj 2019-08-20 11:34:52 -07:00
dsl_deleg.h Remove code for zfs remap 2019-06-24 16:44:01 -07:00
dsl_destroy.h Fast Clone Deletion 2019-07-26 10:54:14 -07:00
dsl_dir.h Remove NOTE(CONSTCOND) and note.h 2021-07-26 12:07:53 -07:00
dsl_pool.h module/*.ko: prune .data, global .rodata 2022-01-14 15:37:55 -08:00
dsl_prop.h Support inheriting properties in channel programs 2020-01-22 17:03:17 -08:00
dsl_scan.h Use dsl_scan_setup_check() to setup a scrub 2021-04-08 14:33:15 -07:00
dsl_synctask.h Add upper bound for slop space calculation 2021-02-24 09:52:43 -08:00
dsl_userhold.h Illumos #3740 2013-11-04 11:17:48 -08:00
edonr.h OpenZFS 4185 - add new cryptographic checksums to ZFS: SHA-512, Skein, Edon-R 2016-10-03 14:51:15 -07:00
efi_partition.h libefi: remove efi_type() 2022-01-18 14:40:43 -08:00
frame.h Linux 5.10 compat: frame.h renamed objtool.h 2020-11-02 22:01:10 +00:00
hkdf.h Encryption patch follow-up 2017-10-11 16:54:48 -04:00
Makefile.am Remove NOTE(CONSTCOND) and note.h 2021-07-26 12:07:53 -07:00
metaslab_impl.h module/*.ko: prune .data, global .rodata 2022-01-14 15:37:55 -08:00
metaslab.h module/*.ko: prune .data, global .rodata 2022-01-14 15:37:55 -08:00
mmp.h Add zfs_multihost_interval tunable handler for FreeBSD 2020-06-23 13:32:42 -07:00
mntent.h Add FreeBSD required defines to mntent.h 2019-11-30 15:49:09 -08:00
mod.h Replace ZFS on Linux references with OpenZFS 2020-10-08 20:10:13 -07:00
multilist.h Re-embed multilist_t storage 2021-06-10 10:42:31 -06:00
nvpair_impl.h Add const to nvlist functions to properly expose their real behavior 2021-12-06 18:19:13 -07:00
nvpair.h module/*.ko: prune .data, global .rodata 2022-01-14 15:37:55 -08:00
objlist.h Implement Redacted Send/Receive 2019-06-19 09:48:12 -07:00
pathname.h Replace ZFS on Linux references with OpenZFS 2020-10-08 20:10:13 -07:00
qat.h include: qat.h: mark unused macro arguments as used 2021-12-23 09:36:21 -08:00
range_tree.h module/*.ko: prune .data, global .rodata 2022-01-14 15:37:55 -08:00
rrwlock.h Rename refcount.h to zfs_refcount.h 2020-07-29 16:35:33 -07:00
sa_impl.h Rename refcount.h to zfs_refcount.h 2020-07-29 16:35:33 -07:00
sa.h module/*.ko: prune .data, global .rodata 2022-01-14 15:37:55 -08:00
skein.h OpenZFS 4185 - add new cryptographic checksums to ZFS: SHA-512, Skein, Edon-R 2016-10-03 14:51:15 -07:00
spa_boot.h Support custom build directories and move includes 2010-09-08 12:38:56 -07:00
spa_checkpoint.h Serialize ZTHR operations to eliminate races 2019-01-13 10:09:46 -08:00
spa_checksum.h Implementation of AVX2 optimized Fletcher-4 2016-06-02 14:30:51 -07:00
spa_impl.h module/*.ko: prune .data, global .rodata 2022-01-14 15:37:55 -08:00
spa_log_spacemap.h Log Spacemap Project 2019-07-16 10:11:49 -07:00
spa.h module/*.ko: prune .data, global .rodata 2022-01-14 15:37:55 -08:00
space_map.h Extend zdb to print inconsistencies in livelists and metaslabs 2020-07-14 17:51:05 -07:00
space_reftree.h Reduce loaded range tree memory usage 2019-10-09 10:36:03 -07:00
sysevent.h OpenZFS 6939 - add sysevents to zfs core for commands 2017-07-12 21:28:13 -07:00
txg_impl.h Fix typos in include/ 2019-08-30 09:53:15 -07:00
txg.h Optimize txg_kick() process (#12274) 2021-07-01 09:20:27 -06:00
u8_textprep_data.h Support custom build directories and move includes 2010-09-08 12:38:56 -07:00
u8_textprep.h Throw const on some strings 2020-10-02 17:44:10 -07:00
uberblock_impl.h MMP interval and fail_intervals in uberblock 2019-03-21 12:47:57 -07:00
uberblock.h Multi-modifier protection (MMP) 2017-07-13 13:54:00 -04:00
uio_impl.h Cleaning up uio headers 2021-02-20 20:16:50 -08:00
unique.h Illumos #3742 2013-11-04 10:55:25 -08:00
uuid.h Support custom build directories and move includes 2010-09-08 12:38:56 -07:00
vdev_disk.h Make struct vdev_disk_t be platform private 2020-06-16 11:43:33 -07:00
vdev_draid.h Verify dRAID empty sectors 2022-01-04 16:46:32 -08:00
vdev_file.h Add zfs_file_* interface, remove vnodes 2019-11-21 09:32:57 -08:00
vdev_impl.h module/*.ko: prune .data, global .rodata 2022-01-14 15:37:55 -08:00
vdev_indirect_births.h OpenZFS 7614, 9064 - zfs device evacuation/removal 2018-04-14 12:16:17 -07:00
vdev_indirect_mapping.h OpenZFS 7614, 9064 - zfs device evacuation/removal 2018-04-14 12:16:17 -07:00
vdev_initialize.h Add TRIM support 2019-03-29 09:13:20 -07:00
vdev_raidz_impl.h module/*.ko: prune .data, global .rodata 2022-01-14 15:37:55 -08:00
vdev_raidz.h Verify dRAID empty sectors 2022-01-04 16:46:32 -08:00
vdev_rebuild.h Fix various typos 2021-04-02 18:52:15 -07:00
vdev_removal.h panic in removal_remap test on 4K devices 2019-06-13 13:12:39 -07:00
vdev_trim.h Trim L2ARC 2020-06-09 10:15:08 -07:00
vdev.h Vdev Properties Feature 2021-11-30 07:46:25 -07:00
xvattr.h Linux 4.18 compat: inode timespec -> timespec64 2018-06-19 21:51:18 -07:00
zap_impl.h OpenZFS 7793 - ztest fails assertion in dmu_tx_willuse_space 2017-03-07 09:51:59 -08:00
zap_leaf.h Fix ENOSPC in "Handle zap_add() failures in ..." 2018-04-18 14:19:50 -07:00
zap.h fat zap should prefetch when iterating 2019-06-12 13:13:09 -07:00
zcp_global.h OpenZFS 7431 - ZFS Channel Programs 2018-02-08 15:28:18 -08:00
zcp_iter.h OpenZFS 7431 - ZFS Channel Programs 2018-02-08 15:28:18 -08:00
zcp_prop.h OpenZFS 7431 - ZFS Channel Programs 2018-02-08 15:28:18 -08:00
zcp_set.h Support setting user properties in a channel program 2020-02-14 13:41:42 -08:00
zcp.h filesystem_limit/snapshot_limit is incorrectly enforced against root 2020-07-11 17:18:02 -07:00
zfeature.h Revert "zhack: Add 'feature disable' command" 2016-05-17 11:52:07 -07:00
zfs_acl.h module/*.ko: prune .data, global .rodata 2022-01-14 15:37:55 -08:00
zfs_bootenv.h zfs label bootenv should store data as nvlist 2020-09-15 15:42:27 -07:00
zfs_context.h module/*.ko: prune .data, global .rodata 2022-01-14 15:37:55 -08:00
zfs_debug.h Annotated dprintf as printf-like 2021-06-22 21:53:45 -07:00
zfs_delay.h Update build system and packaging 2018-05-29 16:00:33 -07:00
zfs_file.h file reference counts can get corrupted 2021-07-10 19:00:37 -06:00
zfs_fuid.h Replace sprintf()->snprintf() and strcpy()->strlcpy() 2020-06-07 11:42:12 -07:00
zfs_ioctl_impl.h module/*.ko: prune .data, global .rodata 2022-01-14 15:37:55 -08:00
zfs_ioctl.h file reference counts can get corrupted 2021-07-10 19:00:37 -06:00
zfs_onexit.h file reference counts can get corrupted 2021-07-10 19:00:37 -06:00
zfs_project.h Minor diff reduction with ZoF in include/sys 2019-11-27 11:11:03 -08:00
zfs_quota.h File incorrectly zeroed when receiving incremental stream that toggles -L 2020-06-09 10:41:01 -07:00
zfs_racct.h Restore FreeBSD resource usage accounting 2021-02-19 22:34:33 -08:00
zfs_ratelimit.h Change checksum & IO delay ratelimit values 2018-03-04 17:34:51 -08:00
zfs_refcount.h Correct refcount_add in dmu_zfetch 2021-10-08 11:10:34 -07:00
zfs_rlock.h Add a "try" operation for range locks 2020-07-06 11:53:31 -07:00
zfs_sa.h module/*.ko: prune .data, global .rodata 2022-01-14 15:37:55 -08:00
zfs_stat.h Support custom build directories and move includes 2010-09-08 12:38:56 -07:00
zfs_sysfs.h zcommon: pre-iterate over sysfs instead of statting every feature 2021-12-16 16:43:10 -08:00
zfs_vfsops.h Add 'zfs rename -u' to rename without remounting 2020-09-01 16:14:16 -07:00
zfs_vnops.h Extending FreeBSD UIO Struct 2021-01-20 21:27:30 -08:00
zfs_znode.h Rename zfs_inode_update to zfs_znode_update_vfs 2021-02-09 11:17:29 -08:00
zil_impl.h make zil max block size tunable 2019-06-10 11:48:42 -07:00
zil.h module/*.ko: prune .data, global .rodata 2022-01-14 15:37:55 -08:00
zio_checksum.h libzfs: convert to -fvisibility=hidden 2021-06-03 13:17:55 -07:00
zio_compress.h Add zstd support to zfs 2020-08-20 10:30:06 -07:00
zio_crypt.h module/*.ko: prune .data, global .rodata 2022-01-14 15:37:55 -08:00
zio_impl.h Add zstd support to zfs 2020-08-20 10:30:06 -07:00
zio_priority.h Add device rebuild feature 2020-07-03 11:05:50 -07:00
zio.h module/*.ko: prune .data, global .rodata 2022-01-14 15:37:55 -08:00
zrlock.h OpenZFS 6328 - Fix cstyle errors in zfs codebase 2017-01-12 09:42:11 -08:00
zthr.h Avoid memory allocations in the ARC eviction thread 2022-01-21 10:28:13 -08:00
zvol_impl.h module/*.ko: prune .data, global .rodata 2022-01-14 15:37:55 -08:00
zvol.h Remove unused function zvol_set_volblocksize() 2021-10-26 17:07:53 -07:00