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9d2e5c14b2
mirror_zfs/module/zfs
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Alexander Motin 9d2e5c14b2 System-wide speculative prefetch limit. 
With some pathological access patterns it is possible to make ZFS
accumulate almost unlimited amount of speculative prefetch ZIOs.
Combined with linear ABD allocations in RAIDZ code, it appears to
be possible to exhaust system KVA, triggering kernel panic.

Address this by introducing a system-wide counter of active prefetch
requests and blocking prefetch distance doubling per stream hits if
the number of active requests is higher that ~6% of ARC size.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by:  Alexander Motin <mav@FreeBSD.org>
Sponsored by:	iXsystems, Inc.
Closes #14516
2023-03-02 14:37:07 -08:00
..
abd.c Avoid small buffer copying on write 2022-07-26 10:10:37 -07:00
aggsum.c More aggsum optimizations 2021-06-09 13:05:34 -07:00
arc.c Fix arc_p aggressive increase 2022-12-01 12:39:43 -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 Prefetch on deadlists merge 2023-03-02 14:37:07 -08:00
bptree.c module: zfs: fix unused, remove argsused 2022-02-16 17:58:56 -08:00
bqueue.c zfs recv hangs if max recordsize is less than received recordsize 2022-09-19 09:39:07 -07:00
btree.c Optimize microzaps 2023-03-02 14:37:07 -08:00
dataset_kstats.c Introduce write-mostly sums 2021-06-09 13:05:34 -07:00
dbuf_stats.c Revert "Reduce dbuf_find() lock contention" 2022-09-21 13:15:51 -07:00
dbuf.c Remove few pointer dereferences in dbuf_read() 2023-03-02 14:37:07 -08:00
ddt_zap.c Refactor dnode dirty context from dbuf_dirty 2020-02-26 16:09:17 -08:00
ddt.c Tinker with slop space accounting with dedup 2021-09-14 12:38:05 -07:00
dmu_diff.c module: zfs: fix unused, remove argsused 2022-02-16 17:58:56 -08:00
dmu_object.c Introduce CPU_SEQID_UNSTABLE 2020-11-02 11:51:12 -08:00
dmu_objset.c Move dmu_buf_rele() after dsl_dataset_sync_done() 2023-03-01 09:36:19 -08:00
dmu_recv.c Deny receiving into encrypted datasets if the keys are not loaded (#14139) 2022-11-04 11:07:29 -07:00
dmu_redact.c Fix incorrect size given to bqueue_enqueue() call in dmu_redact.c 2022-09-21 13:15:51 -07:00
dmu_send.c Fix a race condition in dsl_dataset_sync() when activating features 2023-03-01 09:36:19 -08:00
dmu_traverse.c module: zfs: fix unused, remove argsused 2022-02-16 17:58:56 -08:00
dmu_tx.c Refactor Log Size Limit 2022-09-26 14:55:27 -07:00
dmu_zfetch.c System-wide speculative prefetch limit. 2023-03-02 14:37:07 -08:00
dmu.c Bring per_txg_dirty_frees_percent back to 30 2022-11-01 12:32:40 -07:00
dnode_sync.c Report dnodes with faulty bonuslen 2022-02-16 17:58:55 -08:00
dnode.c Remove few pointer dereferences in dbuf_read() 2023-03-02 14:37:07 -08:00
dsl_bookmark.c Fix -Wattribute-warning in dsl layer 2022-07-27 13:38:56 -07:00
dsl_crypt.c Move dmu_buf_rele() after dsl_dataset_sync_done() 2023-03-01 09:36:19 -08:00
dsl_dataset.c Revert zfeature_active() to static 2023-03-01 09:36:19 -08:00
dsl_deadlist.c Prefetch on deadlists merge 2023-03-02 14:37:07 -08:00
dsl_deleg.c Reduce loaded range tree memory usage 2019-10-09 10:36:03 -07:00
dsl_destroy.c module: zfs: fix unused, remove argsused 2022-02-16 17:58:56 -08:00
dsl_dir.c Avoid null pointer dereference in dsl_fs_ss_limit_check() 2022-12-01 12:39:43 -08:00
dsl_pool.c Move dmu_buf_rele() after dsl_dataset_sync_done() 2023-03-01 09:36:19 -08:00
dsl_prop.c dsl_prop_known_index(): check for invalid prop 2022-11-08 10:16:21 -08:00
dsl_scan.c Partially revert eee9362a7 2023-03-01 09:36:19 -08:00
dsl_synctask.c module: zfs: fix unused, remove argsused 2022-02-16 17:58:56 -08:00
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 fm_fmri_hc_create() must call va_end() before returning 2022-12-01 12:39:42 -08:00
gzip.c module: zfs: fix unused, remove argsused 2022-02-16 17:58:56 -08:00
hkdf.c
lz4.c module: zfs: fix unused, remove argsused 2022-02-16 17:58:56 -08:00
lzjb.c module: zfs: fix unused, remove argsused 2022-02-16 17:58:56 -08:00
Makefile.in Distributed Spare (dRAID) Feature 2020-11-13 13:51:51 -08:00
metaslab.c Stop ganging due to past vdev write errors 2022-11-01 12:36:25 -07:00
mmp.c Optimize small random numbers generation 2021-09-14 12:10:17 -07:00
multilist.c Optimize small random numbers generation 2021-09-14 12:10:17 -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 2020-10-08 20:10:13 -07:00
range_tree.c Several sorted scrub optimizations 2022-07-26 10:10:37 -07:00
refcount.c Export minimal zfs_refcount interfaces 2022-04-06 10:29:00 -07:00
rrwlock.c Rename refcount.h to zfs_refcount.h 2020-07-29 16:35:33 -07:00
sa.c module: zfs: fix unused, remove argsused 2022-02-16 17:58:56 -08:00
sha256.c module: zfs: fix unused, remove argsused 2022-02-16 17:58:56 -08:00
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 module: zfs: fix unused, remove argsused 2022-02-16 17:58:56 -08:00
spa_config.c Cleaning up uio headers 2021-02-20 20:16:50 -08:00
spa_errlog.c module: zfs: fix unused, remove argsused 2022-02-16 17:58:56 -08:00
spa_history.c Annotated dprintf as printf-like 2021-06-24 13:12:36 -07:00
spa_log_spacemap.c Address warnings about possible division by zero from clangsa 2022-12-01 12:39:43 -08:00
spa_misc.c Remove refcount from spa_config_*() 2022-07-26 10:10:37 -07:00
spa_stats.c Remove pool io kstats 2021-06-10 10:50:16 -07:00
spa.c Fix NULL pointer dereference in spa_open_common() 2022-12-01 12:39:42 -08:00
space_map.c Optimize small random numbers generation 2021-09-14 12:10:17 -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 Optimize txg_kick() process (#12274) 2022-09-21 16:12:14 -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_draid_rand.c Distributed Spare (dRAID) Feature 2020-11-13 13:51:51 -08:00
vdev_draid.c Improve too large physical ashift handling 2022-09-21 13:15:15 -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_indirect.c module/zfs: vdev_indirect: vdev_indirect_repair: remove unused variable 2022-05-02 15:42:58 -07:00
vdev_initialize.c module: zfs: fix unused, remove argsused 2022-02-16 17:58:56 -08:00
vdev_label.c Use fallthrough macro 2021-11-02 09:50:30 -07:00
vdev_mirror.c Improve too large physical ashift handling 2022-09-21 13:15:15 -07:00
vdev_missing.c module: zfs: fix unused, remove argsused 2022-02-16 17:58:56 -08:00
vdev_queue.c Avoid vq_lock drop in vdev_queue_aggregate() 2021-09-14 14:31:22 -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_neon.c Linux 5.0 compat: SIMD compatibility 2019-07-12 09:31:20 -07:00
vdev_raidz_math_aarch64_neonx2.c vdev_raidz_math_aarch64_neonx2.c: suppress diagnostic only for GCC 2022-12-09 12:07:38 -08:00
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 Distributed Spare (dRAID) Feature 2020-11-13 13:51:51 -08:00
vdev_raidz_math_powerpc_altivec_common.h Linux ppc64le ieee128 compat: Do not redefine __asm on external headers 2023-01-19 12:50:42 -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_scalar.c Use fallthrough macro 2021-11-02 09:50:30 -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 Initialize parity blocks before RAID-Z reconstruction benchmarking 2021-09-14 14:32:16 -07:00
vdev_raidz.c Improve too large physical ashift handling 2022-09-21 13:15:15 -07:00
vdev_rebuild.c Fix sequential resilver drive failure race condition 2022-10-21 14:05:06 -07:00
vdev_removal.c module: zfs: vdev_removal: remove unused num_indirect 2022-12-01 12:39:44 -08:00
vdev_root.c Distributed Spare (dRAID) Feature 2020-11-13 13:51:51 -08:00
vdev_trim.c Propagate extent_bytes change to autotrim thread 2022-11-01 12:48:23 -07:00
vdev.c zed: unclean disk attachment faults the vdev 2023-01-05 11:09:36 -08:00
zap_leaf.c Optimize microzaps 2023-03-02 14:37:07 -08:00
zap_micro.c Optimize microzaps 2023-03-02 14:37:07 -08:00
zap.c Remove unneeded "extern inline" function declarations 2022-02-16 17:58:56 -08:00
zcp_get.c Add include files for prototypes 2020-06-18 12:21:25 -07:00
zcp_global.c
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 module: zfs: fix unused, remove argsused 2022-02-16 17:58:56 -08:00
zcp.c Fix too few arguments to formatting function 2022-12-01 12:39:43 -08:00
zfeature.c Throw const on some strings 2020-10-02 17:44:10 -07:00
zfs_byteswap.c Mark functions as static 2020-06-18 12:20:38 -07:00
zfs_fm.c Remove an unused variable 2022-12-01 12:39:43 -08:00
zfs_fuid.c Fix regression in POSIX mode behavior 2021-03-19 22:50:46 -07:00
zfs_ioctl.c Cleanup: Make memory barrier definitions consistent across kernels 2022-12-01 12:39:40 -08:00
zfs_log.c Add Module Parameter Regarding Log Size Limit 2022-09-21 16:12:14 -07:00
zfs_onexit.c file reference counts can get corrupted 2021-09-14 12:37:38 -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 Use fallthrough macro 2021-11-02 09:50:30 -07:00
zfs_rlock.c Add a "try" operation for range locks 2020-07-06 11:53:31 -07:00
zfs_sa.c Extending FreeBSD UIO Struct 2021-01-20 21:27:30 -08:00
zfs_vnops.c Revert behavior of 59eab109 on not-Linux 2022-08-02 10:05:14 -07:00
zil.c Introduce minimal ZIL block commit delay 2023-03-02 14:37:07 -08:00
zio_checksum.c module: zfs: fix unused, remove argsused 2022-02-16 17:58:56 -08:00
zio_compress.c module: zfs: fix unused, remove argsused 2022-02-16 17:58:56 -08:00
zio_inject.c Optimize small random numbers generation 2021-09-14 12:10:17 -07:00
zio.c Revert "ztest fails assertion in zio_write_gang_member_ready()" 2023-01-24 15:35:24 -08:00
zle.c Add include files for prototypes 2020-06-18 12:21:25 -07:00
zrlock.c Micro-optimize zrl_remove() 2023-03-02 14:37:07 -08:00
zthr.c Avoid memory allocations in the ARC eviction thread 2022-02-03 15:30:52 -08:00
zvol.c Add Module Parameter Regarding Log Size Limit 2022-09-21 16:12:14 -07:00