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bee5738f77
mirror_zfs/module/zfs
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Matthew Ahrens bee5738f77 make zil max block size tunable 
We've observed that on some highly fragmented pools, most metaslab
allocations are small (~2-8KB), but there are some large, 128K
allocations.  The large allocations are for ZIL blocks.  If there is a
lot of fragmentation, the large allocations can be hard to satisfy.

The most common impact of this is that we need to check (and thus load)
lots of metaslabs from the ZIL allocation code path, causing sync writes
to wait for metaslabs to load, which can take a second or more.  In the
worst case, we may not be able to satisfy the allocation, in which case
the ZIL will resort to txg_wait_synced() to ensure the change is on
disk.

To provide a workaround for this, this change adds a tunable that can
reduce the size of ZIL blocks.

External-issue: DLPX-61719
Reviewed-by: George Wilson <george.wilson@delphix.com>
Reviewed-by: Paul Dagnelie <pcd@delphix.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Matthew Ahrens <mahrens@delphix.com>
Closes #8865
2020-01-22 13:48:56 -08:00
..
abd.c Linux 5.3: Fix switch() fall though compiler errors 2019-09-25 11:27:50 -07:00
aggsum.c OpenZFS 9688 - aggsum_fini leaks memory 2018-10-19 12:08:03 -07:00
arc.c hdr_recl calls zthr_wakeup() on destroyed zthr 2019-09-25 11:27:50 -07:00
blkptr.c Undo c89 workarounds to match with upstream 2017-11-04 13:25:13 -07:00
bplist.c Change KM_PUSHPAGE -> KM_SLEEP 2015-01-16 14:41:26 -08:00
bpobj.c Stack overflow in recursive bpobj_iterate_impl 2019-03-06 09:50:55 -08:00
bptree.c Native Encryption for ZFS on Linux 2017-08-14 10:36:48 -07:00
bqueue.c Wait in 'S' state when send/recv pipe is blocking 2019-06-07 12:45:40 -07:00
cityhash.c OpenZFS 8484 - Implement aggregate sum and use for arc counters 2018-06-06 09:35:59 -07:00
dataset_kstats.c port async unlinked drain from illumos-nexenta 2019-02-12 10:41:15 -08:00
dbuf_stats.c Prefix all refcount functions with zfs_ 2018-10-01 10:42:05 -07:00
dbuf.c Fix lockdep recursive locking false positive in dbuf_destroy 2019-09-25 11:27:49 -07:00
ddt_zap.c fat zap should prefetch when iterating 2019-09-25 11:27:47 -07:00
ddt.c ztest: scrub ddt repair 2019-01-17 15:25:00 -08:00
dmu_diff.c Fix issues found with zfs diff 2018-05-01 11:24:20 -07:00
dmu_object.c Fix send/recv lost spill block 2019-05-07 15:18:44 -07:00
dmu_objset.c Avoid extra taskq_dispatch() calls by DMU 2019-09-25 11:27:48 -07:00
dmu_recv.c Always refuse receving non-resume stream when resume state exists 2019-09-25 11:27:51 -07:00
dmu_send.c Fix send/recv lost spill block 2019-05-07 15:18:44 -07:00
dmu_traverse.c Fix traverse_impl() kmem leak 2018-08-15 09:53:44 -07:00
dmu_tx.c Improve performance by using dmu_tx_hold_*_by_dnode() 2019-09-25 11:27:50 -07:00
dmu_zfetch.c Linux 5.2 compat: rw_tryupgrade() 2019-05-23 13:46:33 -07:00
dmu.c fat zap should prefetch when iterating 2019-09-25 11:27:47 -07:00
dnode_sync.c Reinstate raw receive check when truncating 2019-06-07 12:45:40 -07:00
dnode.c Fix zil replay panic when TX_REMOVE followed by TX_CREATE 2019-09-25 11:27:51 -07:00
dsl_bookmark.c Detect and prevent mixed raw and non-raw sends 2019-03-13 11:00:43 -07:00
dsl_crypt.c Remove VERIFY from dsl_dataset_crypt_stats() 2019-09-25 11:27:49 -07:00
dsl_dataset.c Mutex leak in dsl_dataset_hold_obj() 2019-03-21 10:36:58 -07:00
dsl_deadlist.c OpenZFS 7614, 9064 - zfs device evacuation/removal 2018-04-14 12:16:17 -07:00
dsl_deleg.c Update build system and packaging 2018-05-29 16:00:33 -07:00
dsl_destroy.c Ensure dsl_destroy_head() decrypts objsets 2019-09-25 11:27:49 -07:00
dsl_dir.c Fix TXG_MASK cstyle 2019-04-12 11:30:59 -07:00
dsl_pool.c port async unlinked drain from illumos-nexenta 2019-02-12 10:41:15 -08:00
dsl_prop.c Update build system and packaging 2018-05-29 16:00:33 -07:00
dsl_scan.c Disabled resilver_defer feature leads to looping resilvers 2019-09-25 11:27:51 -07:00
dsl_synctask.c OpenZFS 9166 - zfs storage pool checkpoint 2018-06-26 10:07:42 -07:00
dsl_userhold.c zfs should optionally send holds 2019-02-15 12:41:38 -08:00
edonr_zfs.c DLPX-44812 integrate EP-220 large memory scalability 2016-11-29 14:34:27 -08:00
fm.c OpenZFS 9580 - Add a hash-table on top of nvlist to speed-up operations 2018-07-30 11:30:03 -07:00
gzip.c Update build system and packaging 2018-05-29 16:00:33 -07:00
hkdf.c Encryption patch follow-up 2017-10-11 16:54:48 -04:00
lz4.c Reword comment in lz4_compress_zfs 2019-05-02 16:46:04 -07:00
lzjb.c Change KM_PUSHPAGE -> KM_SLEEP 2015-01-16 14:41:26 -08:00
Makefile.in Add TRIM support 2019-03-29 09:13:20 -07:00
metaslab.c Allow metaslab to be unloaded even when not freed from 2019-09-25 11:27:47 -07:00
mmp.c MMP interval and fail_intervals in uberblock 2019-03-21 12:47:57 -07:00
multilist.c Avoid extra taskq_dispatch() calls by DMU 2019-09-25 11:27:48 -07:00
pathname.c Disable unused pathname::pn_path* (unneeded in Linux) 2019-09-25 11:27:49 -07:00
policy.c Implement secpolicy_vnode_setid_retain() 2019-09-25 11:27:50 -07:00
qat_compress.c QAT related bug fixes 2019-09-25 11:27:51 -07:00
qat_crypt.c QAT related bug fixes 2019-09-25 11:27:51 -07:00
qat.c QAT related bug fixes 2019-09-25 11:27:51 -07:00
qat.h QAT related bug fixes 2019-09-25 11:27:51 -07:00
range_tree.c Restrict kstats and print real pointers 2019-04-04 18:57:06 -07:00
refcount.c Add zfs_refcount_transfer_ownership_many() 2018-10-09 10:05:48 -07:00
rrwlock.c Prefix all refcount functions with zfs_ 2018-10-01 10:42:05 -07:00
sa.c Improve performance by using dmu_tx_hold_*_by_dnode() 2019-09-25 11:27:50 -07:00
sha256.c SHA256 QAT acceleration 2018-03-15 10:53:58 -07:00
skein_zfs.c DLPX-44812 integrate EP-220 large memory scalability 2016-11-29 14:34:27 -08:00
spa_boot.c Add linux kernel module support 2010-08-31 13:41:58 -07:00
spa_checkpoint.c Get rid of space_map_update() for ms_synced_length 2019-02-12 10:38:11 -08:00
spa_config.c Fix /etc/hostid on root pool deadlock 2019-09-25 11:27:51 -07:00
spa_errlog.c Update build system and packaging 2018-05-29 16:00:33 -07:00
spa_history.c Create /proc/sys/kernel/spl/gitrev with git hash 2018-10-08 21:57:02 -07:00
spa_misc.c Fix /etc/hostid on root pool deadlock 2019-09-25 11:27:51 -07:00
spa_stats.c Restrict kstats and print real pointers 2019-04-04 18:57:06 -07:00
spa.c Fix /etc/hostid on root pool deadlock 2019-09-25 11:27:51 -07:00
space_map.c Restrict kstats and print real pointers 2019-04-04 18:57:06 -07:00
space_reftree.c OpenZFS 7614, 9064 - zfs device evacuation/removal 2018-04-14 12:16:17 -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
trace.c OpenZFS 7614, 9064 - zfs device evacuation/removal 2018-04-14 12:16:17 -07:00
txg.c Fix txg_wait_open() load average inflation 2019-04-04 09:44:46 -07:00
uberblock.c MMP interval and fail_intervals in uberblock 2019-03-21 12:47:57 -07:00
unique.c Performance optimization of AVL tree comparator functions 2016-08-31 14:35:34 -07:00
vdev_cache.c Update build system and packaging 2018-05-29 16:00:33 -07:00
vdev_disk.c Scrubbing root pools may deadlock on kernels without elevator_change() (#9321) 2019-09-25 11:27:51 -07:00
vdev_file.c Update vdev_ops_t from illumos 2019-09-25 11:27:48 -07:00
vdev_indirect_births.c Fixes: #8934 Large kmem_alloc 2019-09-25 11:27:49 -07:00
vdev_indirect_mapping.c Get rid of space_map_update() for ms_synced_length 2019-02-12 10:38:11 -08:00
vdev_indirect.c Update vdev_ops_t from illumos 2019-09-25 11:27:48 -07:00
vdev_initialize.c Add TRIM support 2019-03-29 09:13:20 -07:00
vdev_label.c panic in removal_remap test on 4K devices 2019-09-25 11:27:47 -07:00
vdev_mirror.c Update vdev_ops_t from illumos 2019-09-25 11:27:48 -07:00
vdev_missing.c Update vdev_ops_t from illumos 2019-09-25 11:27:48 -07:00
vdev_queue.c Move write aggregation memory copy out of vq_lock 2019-09-25 11:27:47 -07:00
vdev_raidz_math_aarch64_neon_common.h Linux 5.0 compat: ASM_BUG macro 2019-05-08 10:18:40 -07:00
vdev_raidz_math_aarch64_neon.c codebase style improvements for OpenZFS 6459 port 2017-01-22 13:25:40 -08:00
vdev_raidz_math_aarch64_neonx2.c ABD raidz NEON support 2016-11-29 14:34:33 -08:00
vdev_raidz_math_avx2.c Linux 5.0 compat: ASM_BUG macro 2019-05-08 10:18:40 -07:00
vdev_raidz_math_avx512bw.c Linux 5.0 compat: ASM_BUG macro 2019-05-08 10:18:40 -07:00
vdev_raidz_math_avx512f.c Use cstyle -cpP in make cstyle check 2016-12-12 10:46:26 -08:00
vdev_raidz_math_impl.h codebase style improvements for OpenZFS 6459 port 2017-01-22 13:25:40 -08:00
vdev_raidz_math_scalar.c Linux 5.3: Fix switch() fall though compiler errors 2019-09-25 11:27:50 -07:00
vdev_raidz_math_sse2.c ABD raidz avx512f support 2016-11-29 14:34:33 -08:00
vdev_raidz_math_ssse3.c Linux 5.0 compat: ASM_BUG macro 2019-05-08 10:18:40 -07:00
vdev_raidz_math.c Fix typo in vdev_raidz_math.c 2019-09-25 11:27:47 -07:00
vdev_raidz.c Update vdev_ops_t from illumos 2019-09-25 11:27:48 -07:00
vdev_removal.c panic in removal_remap test on 4K devices 2019-09-25 11:27:47 -07:00
vdev_root.c Update vdev_ops_t from illumos 2019-09-25 11:27:48 -07:00
vdev_trim.c Add TRIM support 2019-03-29 09:13:20 -07:00
vdev.c Allow metaslab to be unloaded even when not freed from 2019-09-25 11:27:47 -07:00
zap_leaf.c Off-by-one in zap_leaf_array_create() 2019-01-18 09:58:46 -08:00
zap_micro.c fat zap should prefetch when iterating 2019-09-25 11:27:47 -07:00
zap.c fat zap should prefetch when iterating 2019-09-25 11:27:47 -07:00
zcp_get.c Fix get_special_prop() build failure 2019-09-25 11:27:49 -07:00
zcp_global.c OpenZFS 8600 - ZFS channel programs - snapshot 2018-02-08 15:29:24 -08:00
zcp_iter.c OpenZFS 9337 - zfs get all is slow due to uncached metadata 2018-07-12 10:49:27 -07:00
zcp_synctask.c OpenZFS 9166 - zfs storage pool checkpoint 2018-06-26 10:07:42 -07:00
zcp.c OpenZFS 9424 - ztest failure: "unprotected error in call to Lua API (Invalid value type 'function' for key 'error')" 2018-07-10 21:29:23 -07:00
zfeature.c Consistently captialize GUID for features 2019-04-16 10:01:51 -07:00
zfs_acl.c Update build system and packaging 2018-05-29 16:00:33 -07:00
zfs_byteswap.c Update build system and packaging 2018-05-29 16:00:33 -07:00
zfs_ctldir.c Use zfsctl_snapshot_hold() wrapper 2019-09-25 11:27:49 -07:00
zfs_debug.c Restrict kstats and print real pointers 2019-04-04 18:57:06 -07:00
zfs_dir.c port async unlinked drain from illumos-nexenta 2019-02-12 10:41:15 -08:00
zfs_fm.c Add zpool status -s (slow I/Os) and -p (parseable) 2018-11-08 16:47:24 -08:00
zfs_fuid.c Update build system and packaging 2018-05-29 16:00:33 -07:00
zfs_ioctl.c zfs_ioc_snapshot: check user-prop permissions on snapshotted datasets 2019-09-25 11:27:50 -07:00
zfs_log.c make zil max block size tunable 2020-01-22 13:48:56 -08:00
zfs_onexit.c Update build system and packaging 2018-05-29 16:00:33 -07:00
zfs_ratelimit.c Change checksum & IO delay ratelimit values 2018-03-04 17:34:51 -08:00
zfs_replay.c Fix zil replay panic when TX_REMOVE followed by TX_CREATE 2019-09-25 11:27:51 -07:00
zfs_rlock.c OpenZFS 9689 - zfs range lock code should not be zpl-specific 2018-10-11 10:19:33 -07:00
zfs_sa.c Project Quota on ZFS 2018-02-13 14:54:54 -08:00
zfs_sysfs.c Prevent pointer to an out-of-scope local variable 2019-09-25 11:27:48 -07:00
zfs_vfsops.c Fix deadlock in 'zfs rollback' 2019-09-25 11:27:50 -07:00
zfs_vnops.c Fix out-of-order ZIL txtype lost on hardlinked files 2019-09-25 11:27:50 -07:00
zfs_znode.c Fix deadlock in 'zfs rollback' 2019-09-25 11:27:50 -07:00
zil.c make zil max block size tunable 2020-01-22 13:48:56 -08:00
zio_checksum.c Undo c89 workarounds to match with upstream 2017-11-04 13:25:13 -07:00
zio_compress.c OpenZFS 9403 - assertion failed in arc_buf_destroy() 2018-08-29 11:33:33 -07:00
zio_crypt.c Always call rw_init in zio_crypt_key_unwrap 2019-04-10 15:39:40 -07:00
zio_inject.c Multiple DVA Scrubbing Fix 2019-03-15 14:14:31 -07:00
zio.c nopwrites on dmu_sync-ed blocks can result in a panic 2019-09-25 11:27:48 -07:00
zle.c Fix zle_decompress out of bound access 2018-02-09 10:08:05 -08:00
zpl_ctldir.c RHEL 7.5 compat: FMODE_KABI_ITERATE 2018-05-02 15:01:24 -07:00
zpl_export.c Use cstyle -cpP in make cstyle check 2016-12-12 10:46:26 -08:00
zpl_file.c Fix errant EFAULT during writes (#8719) 2019-05-08 10:04:04 -07:00
zpl_inode.c Fix errant EFAULT during writes (#8719) 2019-05-08 10:04:04 -07:00
zpl_super.c Fix statfs(2) for 32-bit user space 2018-09-24 17:11:25 -07:00
zpl_xattr.c Drop redundant POSIX ACL check in zpl_init_acl() 2019-09-25 11:27:49 -07:00
zrlock.c Update build system and packaging 2018-05-29 16:00:33 -07:00
zthr.c Fix txg_wait_open() load average inflation 2019-04-04 09:44:46 -07:00
zvol.c make zil max block size tunable 2020-01-22 13:48:56 -08:00