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Alexander Motin 55427add3c
Several improvements to ARC shrinking (#16197) 
- When receiving memory pressure signal from OS be more strict
trying to free some memory.  Otherwise kernel may come again and
request much more.  Return as result how much arc_c was actually
reduced due to this request, that may be less than requested.
 - On Linux when receiving direct reclaim from some file system
(that may be ZFS) instead of ignoring request completely, just
shrink the ARC, but do not wait for eviction.  Waiting there may
cause deadlock.  Ignoring it as before may put extra pressure on
other caches and/or swap, and cause OOM if nothing help.  While
not waiting may result in more ARC evicted later, and may be too
late if OOM killer activate right now, but I hope it to be better
than doing nothing at all.
 - On Linux set arc_no_grow before waiting for reclaim, not after,
or it may grow back while we are waiting.
 - On Linux add new parameter zfs_arc_shrinker_seeks to balance
ARC eviction cost, relative to page cache and other subsystems.
 - Slightly update Linux arc_set_sys_free() math for new kernels.

Signed-off-by:	Alexander Motin <mav@FreeBSD.org>
Sponsored by:	iXsystems, Inc.
Reviewed-by: Rob Norris <rob.norris@klarasystems.com>
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
 		2024-07-25 10:31:14 -07:00
..
crypto icp: remove skein module 2024-05-31 15:13:39 -07:00
fm Add slow disk diagnosis to ZED 2024-02-08 09:19:52 -08:00
fs ddt: dedup table quota enforcement 2024-07-25 09:47:36 -07:00
lua autoconf: single-step includes 2022-05-10 10:18:51 -07:00
sysevent Teach zpool scrub to scrub only blocks in error log 2023-05-18 11:59:42 -07:00
zstd Unbreak zstd build on sparc64 2022-05-25 09:18:49 -07:00
abd.h vdev_disk: rename existing functions to vdev_classic_* 2024-03-25 16:50:47 -07:00
abd_impl.h abd: add page iterator 2024-03-25 16:50:35 -07:00
aggsum.h More aggsum optimizations 2021-06-07 09:02:47 -07:00
arc.h Unify arc_prune_async() code 2023-10-30 16:56:04 -07:00
arc_impl.h Several improvements to ARC shrinking (#16197) 2024-07-25 10:31:14 -07:00
asm_linkage.h Unify Assembler files between Linux and Windows 2023-01-17 11:09:19 -08:00
avl.h Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
avl_impl.h Make sure avl_tree.avl_pad is not in kernel module (#16280) 2024-07-17 13:54:11 -07:00
bitmap.h Replace dead opensolaris.org license links 2023-03-14 14:44:01 -07:00
bitops.h Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
blake3.h Update BLAKE3 for using the new impl handling 2023-03-02 13:52:27 -08:00
blkptr.h OpenZFS 8067 - zdb should be able to dump literal embedded block pointer 2017-07-07 11:28:01 -07:00
bplist.h Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
bpobj.h Add explicit prefetches to bpobj_iterate(). 2023-07-21 11:50:48 -07:00
bptree.h Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
bqueue.h Batch enqueue/dequeue for bqueue 2023-01-10 13:39:22 -08:00
brt.h zdb: include cloned blocks in block statistics 2023-08-01 08:56:30 -07:00
brt_impl.h brt: lift internal definitions into _impl header 2023-11-27 13:34:43 -08:00
btree.h btree: Implement faster binary search algorithm 2023-05-26 10:03:12 -07:00
dataset_kstats.h Update the kstat dataset_name when renaming a zvol 2023-11-07 11:34:50 -08:00
dbuf.h dmu: Allow buffer fills to fail 2023-12-15 09:51:41 -08:00
ddt.h ddt: dedup table quota enforcement 2024-07-25 09:47:36 -07:00
ddt_impl.h ddt: reduce DDT_NAMELEN 2024-02-26 12:24:22 -08:00
dmu.h ZAP: Massively switch to _by_dnode() interfaces 2024-03-25 14:58:50 -07:00
dmu_impl.h ZIL: Avoid dbuf_read() before dmu_sync(). 2023-08-11 09:04:08 -07:00
dmu_objset.h Add prefetch property 2023-10-24 11:00:07 -07:00
dmu_recv.h nvpair: Constify string functions 2023-03-14 15:25:50 -07:00
dmu_redact.h Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
dmu_send.h Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
dmu_traverse.h Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
dmu_tx.h Add dmu_tx_hold_append() interface 2023-05-09 09:03:10 -07:00
dmu_zfetch.h Speculative prefetch for reordered requests 2024-04-08 15:13:27 -07:00
dnode.h Linux 6.3 compat: Fix memcpy "detected field-spanning write" error 2023-04-13 09:12:03 -07:00
dsl_bookmark.h Increase limit of redaction list by using spill block 2023-08-26 11:34:43 -07:00
dsl_crypt.h Allow block cloning across encrypted datasets 2023-12-05 11:03:48 -08:00
dsl_dataset.h Revert zfeature_active() to static 2023-02-28 14:03:52 -08:00
dsl_deadlist.h Cleanup: 64-bit kernel module parameters should use fixed width types 2022-10-13 10:03:29 -07:00
dsl_deleg.h Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
dsl_destroy.h Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
dsl_dir.h Cleanup ->dd_space_towrite should be unsigned 2023-01-20 11:10:15 -08:00
dsl_pool.h Cleanup: 64-bit kernel module parameters should use fixed width types 2022-10-13 10:03:29 -07:00
dsl_prop.h Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
dsl_scan.h Fix scn_queue races on very old pools 2024-05-09 07:32:59 -07:00
dsl_synctask.h Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
dsl_userhold.h Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
edonr.h Remove unused constant EdonR256_BLOCK_BITSIZE 2023-03-22 08:39:48 -07:00
efi_partition.h Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
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
metaslab.h Selectable block allocators 2023-09-01 18:00:30 -07:00
metaslab_impl.h Reduce number of metaslab preload taskq threads. 2023-10-06 09:04:00 -07:00
mmp.h Cleanup: 64-bit kernel module parameters should use fixed width types 2022-10-13 10:03:29 -07:00
mntent.h Expose ZFS dataset case sensitivity setting via sb_opts 2022-07-14 10:38:16 -07:00
mod.h linux: module: weld all but spl.ko into zfs.ko 2022-04-20 13:28:24 -07:00
multilist.h L2ARC: Relax locking during write 2024-04-09 16:23:19 -07:00
nvpair.h nvpair: Use flexible array member for nvpair name strings 2023-03-14 15:25:55 -07:00
nvpair_impl.h Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
objlist.h Implement Redacted Send/Receive 2019-06-19 09:48:12 -07:00
pathname.h Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
qat.h Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
range_tree.h Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
rrwlock.h Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
sa.h Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
sa_impl.h Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
sha2.h icp: remove unused SHA2 HMAC mechanisms 2024-05-31 15:13:30 -07:00
skein.h icp: remove digest entry points 2024-05-31 15:13:16 -07:00
spa.h ddt: dedup table quota enforcement 2024-07-25 09:47:36 -07:00
spa_checkpoint.h Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
spa_checksum.h Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
spa_impl.h ddt: dedup table quota enforcement 2024-07-25 09:47:36 -07:00
spa_log_spacemap.h Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
space_map.h Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
space_reftree.h Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
sysevent.h Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
txg.h Cleanup: Specify unsignedness on things that should not be signed 2022-09-27 16:42:41 -07:00
txg_impl.h Properly pad struct tx_cpu to cache line 2023-10-20 11:54:05 -07:00
u8_textprep.h Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
u8_textprep_data.h Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
uberblock.h Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
uberblock_impl.h vdev probe to slow disk can stall mmp write checker 2024-04-29 14:35:53 -07:00
uio_impl.h Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
unique.h Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
uuid.h Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
vdev.h RAID-Z expansion feature 2023-11-08 10:19:41 -08:00
vdev_disk.h Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
vdev_draid.h Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
vdev_file.h Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
vdev_impl.h vdev probe to slow disk can stall mmp write checker 2024-04-29 14:35:53 -07:00
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 the ability to uninitialize 2023-05-18 10:02:20 -07:00
vdev_raidz.h RAID-Z expansion feature 2023-11-08 10:19:41 -08:00
vdev_raidz_impl.h Workaround UBSAN errors for variable arrays 2023-11-12 16:26:07 -08:00
vdev_rebuild.h Do not report bytes skipped by scan as issued. 2023-06-30 08:47:13 -07:00
vdev_removal.h Cleanup: Specify unsignedness on things that should not be signed 2022-09-27 16:42:41 -07:00
vdev_trim.h Fix short-lived txg caused by autotrim 2023-03-28 08:43:41 -07:00
xvattr.h Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zap.h ZAP: Massively switch to _by_dnode() interfaces 2024-03-25 14:58:50 -07:00
zap_impl.h ZAP: Massively switch to _by_dnode() interfaces 2024-03-25 14:58:50 -07:00
zap_leaf.h zap_leaf: make l_hash[] variable length to silence UBSAN 2024-04-03 16:38:18 -07:00
zcp.h Cleanup: 64-bit kernel module parameters should use fixed width types 2022-10-13 10:03:29 -07:00
zcp_global.h OpenZFS 7431 - ZFS Channel Programs 2018-02-08 15:28:18 -08:00
zcp_iter.h Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
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
zfeature.h Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zfs_acl.h Linux 6.3 compat: idmapped mount API changes 2023-04-10 14:15:36 -07:00
zfs_bootenv.h zfs label bootenv should store data as nvlist 2020-09-15 15:42:27 -07:00
zfs_chksum.h Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zfs_context.h Simplify issig(). 2024-05-29 10:49:11 -07:00
zfs_debug.h zdb/ztest: send dbgmsg output to stderr 2024-05-14 09:49:00 -07:00
zfs_delay.h Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zfs_file.h Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zfs_fuid.h Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zfs_impl.h Add generic implementation handling and SHA2 impl 2023-03-02 13:52:21 -08:00
zfs_ioctl.h Parallel pool import 2024-04-22 09:42:38 -07:00
zfs_ioctl_impl.h Cleanup: 64-bit kernel module parameters should use fixed width types 2022-10-13 10:03:29 -07:00
zfs_onexit.h zfs_onexit_add_cb: make action_handle point to a uintptr_t 2022-11-03 09:52:12 -07:00
zfs_project.h Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zfs_quota.h Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zfs_racct.h Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zfs_ratelimit.h Change checksum & IO delay ratelimit values 2018-03-04 17:34:51 -08:00
zfs_refcount.h Switch refcount tracking from lists to AVL-trees. 2023-06-14 08:02:27 -07:00
zfs_rlock.h Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zfs_sa.h Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zfs_stat.h Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zfs_sysfs.h Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zfs_vfsops.h Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zfs_vnops.h BRT: Fix FICLONE/FICLONERANGE shortened copy 2024-02-05 16:44:45 -08:00
zfs_znode.h ZIL: Cleanup sync and commit handling 2023-10-30 14:51:56 -07:00
zil.h zil: Add some more statistics. 2023-05-25 13:51:53 -07:00
zil_impl.h ZIL: Improve next log block size prediction 2023-12-21 10:54:44 -08:00
zio.h Improve write issue taskqs utilization 2024-05-01 11:07:20 -07:00
zio_checksum.h Don't emit cksum_{actual_expected} in ereport.fs.zfs.checksum events 2023-07-21 11:49:26 -07:00
zio_compress.h Skip memory allocation when compressing holes 2023-02-27 14:41:02 -08:00
zio_crypt.h Enable -Wwrite-strings 2022-06-29 14:08:54 -07:00
zio_impl.h zio: rename ZIO_TYPE_IOCTL to ZIO_TYPE_FLUSH 2024-04-11 17:17:23 -07:00
zio_priority.h Add device rebuild feature 2020-07-03 11:05:50 -07:00
zrlock.h Pack zrlock_t by 8 bytes 2023-01-05 09:31:55 -08:00
zthr.h Avoid memory allocations in the ARC eviction thread 2022-01-21 10:28:13 -08:00
zvol.h zvol: fix delayed update to block device ro entry 2023-10-31 09:50:38 -07:00
zvol_impl.h zvol: Implement zvol threading as a Property 2023-10-31 09:50:32 -07:00