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Herb Wartens 33075e465f Allow MMP to bypass waiting for other threads 
At our site we have seen cases when multi-modifier protection is enabled
(multihost=on) on our pool and the pool gets suspended due to a single
disk that is failing and responding very slowly. Our pools have 90 disks
in them and we expect disks to fail. The current version of MMP requires
that we wait for other writers before moving on. When a disk is
responding very slowly, we observed that waiting here was bad enough to
cause the pool to suspend. This change allows the MMP thread to bypass
waiting for other threads and reduces the chances the pool gets
suspended.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Herb Wartens <hawartens@gmail.com>
Closes #14659
 		2023-04-24 12:55:07 -07:00
..
crypto Remove sha1 hashing from OpenZFS, it's not used anywhere. 2022-07-26 10:12:44 -07:00
fm Upstream: Add snapshot and zvol events 2022-02-10 11:04:06 -08:00
fs zed: add hotplug support for spare vdevs 2023-03-27 11:32:09 -07:00
lua FreeBSD: Reduce stack usage of Lua 2020-09-22 16:03:11 -07:00
sysevent zed: Fix config_sync autoexpand flood 2022-09-14 09:57:44 -07:00
zstd Update `checkstyle` workflow env to ubuntu-20.04 2021-12-08 13:27:56 -08:00
Makefile.am Restore FreeBSD resource usage accounting 2021-02-19 22:34:33 -08:00
abd.h Avoid small buffer copying on write 2022-07-26 10:10:37 -07:00
abd_impl.h Avoid small buffer copying on write 2022-07-26 10:10:37 -07:00
aggsum.h More aggsum optimizations 2021-06-09 13:05:34 -07:00
arc.h Introduce a tunable to exclude special class buffers from L2ARC 2022-09-14 11:27:00 -07:00
arc_impl.h System-wide speculative prefetch limit. 2023-03-02 14:37:07 -08:00
avl.h Restore avl_update() calls and related functions 2020-06-03 09:49:32 -07:00
avl_impl.h Support custom build directories and move includes 2010-09-08 12:38:56 -07:00
bitops.h Reduce loaded range tree memory usage 2019-10-09 10:36:03 -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 Prefetch on deadlists merge 2023-03-02 14:37:07 -08:00
bptree.h Illumos 4914 - zfs on-disk bookmark structure should be named *_phys_t 2014-08-06 14:48:41 -07:00
bqueue.h zfs recv hangs if max recordsize is less than received recordsize 2022-09-19 09:39:07 -07:00
btree.h Optimize microzaps 2023-03-02 14:37:07 -08:00
dataset_kstats.h Introduce write-mostly sums 2021-06-09 13:05:34 -07:00
dbuf.h Revert "Reduce dbuf_find() lock contention" 2022-09-21 13:15:51 -07:00
ddt.h Appease GCC sprintf warnings found on Fedora 32/GCC 10.0.1 2020-08-24 10:32:59 -07:00
dmu.h Add options to zfs redundant_metadata property 2022-11-01 12:25:58 -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 2022-09-14 11:27:00 -07:00
dmu_recv.h Removed duplicated includes 2021-03-22 12:34:58 -07:00
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 Refactor Log Size Limit 2022-09-26 14:55:27 -07:00
dmu_zfetch.h More speculative prefetcher improvements 2022-07-26 10:10:37 -07:00
dnode.h Switch dnode stats to wmsums 2023-03-02 14:37:07 -08:00
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 Revert zfeature_active() to static 2023-03-01 09:36:19 -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 Introduce dsl_dir_diduse_transfer_space() 2021-09-14 12:38:51 -07:00
dsl_pool.h Refactor Log Size Limit 2022-09-26 14:55:27 -07:00
dsl_prop.h Support inheriting properties in channel programs 2020-01-22 17:03:17 -08:00
dsl_scan.h Several sorted scrub optimizations 2022-07-26 10:10:37 -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 Fix typos in include/ 2019-08-30 09:53:15 -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 Improve log spacemap load time 2022-07-26 10:10:37 -07:00
metaslab_impl.h Improve log spacemap load time 2022-07-26 10:10:37 -07:00
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 10:50:16 -07:00
note.h Update build system and packaging 2018-05-29 16:00:33 -07:00
nvpair.h FreeBSD: make adjustments for the standalone environment 2020-10-13 21:05:49 -07:00
nvpair_impl.h OpenZFS 9580 - Add a hash-table on top of nvlist to speed-up operations 2018-07-30 11:30:03 -07:00
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 QAT related bug fixes 2019-09-12 13:33:44 -07:00
range_tree.h Several sorted scrub optimizations 2022-07-26 10:10:37 -07:00
rrwlock.h Rename refcount.h to zfs_refcount.h 2020-07-29 16:35:33 -07:00
sa.h Extending FreeBSD UIO Struct 2021-01-20 21:27:30 -08:00
sa_impl.h Rename refcount.h to zfs_refcount.h 2020-07-29 16:35:33 -07:00
skein.h OpenZFS 4185 - add new cryptographic checksums to ZFS: SHA-512, Skein, Edon-R 2016-10-03 14:51:15 -07:00
spa.h Allow MMP to bypass waiting for other threads 2023-04-24 12:55:07 -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 Remove refcount from spa_config_*() 2022-07-26 10:10:37 -07:00
spa_log_spacemap.h Improve log spacemap load time 2022-07-26 10:10:37 -07:00
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.h Optimize txg_kick() process (#12274) 2022-09-21 16:12:14 -07:00
txg_impl.h Fix typos in include/ 2019-08-30 09:53:15 -07:00
u8_textprep.h Throw const on some strings 2020-10-02 17:44:10 -07:00
u8_textprep_data.h Support custom build directories and move includes 2010-09-08 12:38:56 -07:00
uberblock.h Multi-modifier protection (MMP) 2017-07-13 13:54:00 -04:00
uberblock_impl.h MMP interval and fail_intervals in uberblock 2019-03-21 12:47:57 -07:00
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.h zed: mark disks as REMOVED when they are removed 2023-03-27 11:32:09 -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 2022-02-03 15:28:01 -08:00
vdev_file.h Add zfs_file_* interface, remove vnodes 2019-11-21 09:32:57 -08:00
vdev_impl.h zed: mark disks as REMOVED when they are removed 2023-03-27 11:32:09 -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 TRIM support 2019-03-29 09:13:20 -07:00
vdev_raidz.h Verify dRAID empty sectors 2022-02-03 15:28:01 -08:00
vdev_raidz_impl.h Fix dRAID sequential resilver silent damage handling 2021-05-27 22:31:56 -07:00
vdev_rebuild.h Fix various typos 2021-04-07 13:27:11 -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
xvattr.h Linux 4.18 compat: inode timespec -> timespec64 2018-06-19 21:51:18 -07:00
zap.h Linux 5.19 compat: zap_flags_t conflict 2022-06-01 14:24:49 -07:00
zap_impl.h Optimize microzaps 2023-03-02 14:37:07 -08:00
zap_leaf.h Fix ENOSPC in "Handle zap_add() failures in ..." 2018-04-18 14:19:50 -07:00
zcp.h filesystem_limit/snapshot_limit is incorrectly enforced against root 2020-07-11 17:18:02 -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
zfeature.h Revert "zhack: Add 'feature disable' command" 2016-05-17 11:52:07 -07:00
zfs_acl.h Return an error code from zfs_acl_chmod_setattr 2019-11-01 10:19:11 -07:00
zfs_bootenv.h zfs label bootenv should store data as nvlist 2020-09-15 15:42:27 -07:00
zfs_context.h zed: mark disks as REMOVED when they are removed 2023-03-27 11:32:09 -07:00
zfs_debug.h Annotated dprintf as printf-like 2021-06-24 13:12:36 -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 2021-09-14 12:37:38 -07:00
zfs_fuid.h Replace sprintf()->snprintf() and strcpy()->strlcpy() 2020-06-07 11:42:12 -07:00
zfs_ioctl.h file reference counts can get corrupted 2021-09-14 12:37:38 -07:00
zfs_ioctl_impl.h libzfs: On FreeBSD, use MNT_NOWAIT with getfsstat 2021-06-09 13:05:34 -07:00
zfs_onexit.h file reference counts can get corrupted 2021-09-14 12:37:38 -07:00
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 Use more atomics in refcounts 2021-09-14 14:31:01 -07:00
zfs_rlock.h Add a "try" operation for range locks 2020-07-06 11:53:31 -07:00
zfs_sa.h Extending FreeBSD UIO Struct 2021-01-20 21:27:30 -08:00
zfs_stat.h Support custom build directories and move includes 2010-09-08 12:38:56 -07:00
zfs_sysfs.h Fix in-kernel sysfs entries 2018-09-06 21:44:52 -07:00
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 Remove atomics from zh_refcount 2023-03-02 14:37:07 -08:00
zil.h Fix -Wattribute-warning in zfs_log_xvattr() 2022-07-27 13:38:56 -07:00
zil_impl.h make zil max block size tunable 2019-06-10 11:48:42 -07:00
zio.h include: move SPA_MINBLOCKSHIFT and zio_encrypt to sys/fs/zfs.h 2022-09-21 13:15:26 -07:00
zio_checksum.h Remove dependency on linear ABD 2017-03-29 12:24:51 -07:00
zio_compress.h Add zstd support to zfs 2020-08-20 10:30:06 -07:00
zio_crypt.h Rename refcount.h to zfs_refcount.h 2020-07-29 16:35:33 -07:00
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
zrlock.h Pack zrlock_t by 8 bytes 2023-03-02 14:37:07 -08:00
zthr.h Avoid memory allocations in the ARC eviction thread 2022-02-03 15:30:52 -08:00
zvol.h async zvol minor node creation interferes with receive 2020-02-03 09:33:14 -08:00
zvol_impl.h Fix zfs_get_data access to files with wrong generation 2021-03-19 22:53:31 -07:00