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b8738257c2
mirror_zfs/module/zfs
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Matthew Ahrens b8738257c2 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
2019-06-10 11:48:42 -07:00
..
abd.c abd_alloc should use scatter for >1K allocations 2019-02-28 17:52:55 -08:00
aggsum.c OpenZFS 9688 - aggsum_fini leaks memory 2018-10-19 12:08:03 -07:00
arc.c Fix comparison signedness in arc_is_overflowing() 2019-06-10 09:52:25 -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 2019-06-03 20:54:43 -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 send/recv lost spill block 2019-05-07 15:18:44 -07:00
ddt_zap.c Update build system and packaging 2018-05-29 16:00:33 -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 Prevent user accounting on readonly pool 2019-02-19 18:41:18 -08:00
dmu_recv.c Fix incorrect error message for raw receive 2019-06-10 09:45:08 -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 Prefix all refcount functions with zfs_ 2018-10-01 10:42:05 -07:00
dmu_zfetch.c Linux 5.2 compat: rw_tryupgrade() 2019-05-23 13:46:33 -07:00
dmu.c Revert "Report holes when there are only metadata changes" 2019-05-30 17:13:18 -07:00
dnode_sync.c Reinstate raw receive check when truncating 2019-06-06 13:47:33 -07:00
dnode.c Fix incorrect assertion in dnode_dirty_l1range 2019-05-19 17:30:33 -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 Better user experience for errata 4 2019-03-14 16:48:30 -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 zfs receive and rollback can skew filesystem_count 2019-01-08 10:17:46 -08:00
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 Make zfs_async_block_max_blocks handle zero correctly 2019-06-03 09:40:48 -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 2019-06-06 19:10:43 -07:00
mmp.c MMP interval and fail_intervals in uberblock 2019-03-21 12:47:57 -07:00
multilist.c Update build system and packaging 2018-05-29 16:00:33 -07:00
pathname.c Update build system and packaging 2018-05-29 16:00:33 -07:00
policy.c Take user namespaces into account in policy checks 2018-03-07 15:40:42 -08:00
qat_compress.c Code improvement and bug fixes for QAT support 2019-04-16 12:38:36 -07:00
qat_crypt.c Code improvement and bug fixes for QAT support 2019-04-16 12:38:36 -07:00
qat.c Code improvement and bug fixes for QAT support 2019-04-16 12:38:36 -07:00
qat.h Code improvement and bug fixes for QAT support 2019-04-16 12:38:36 -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 Prefix all refcount functions with zfs_ 2018-10-01 10:42:05 -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 Remove vn_set_fs_pwd()/vn_set_pwd() (no need to be at / during insmod) 2019-05-29 16:18:14 -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 coverity defects: CID 186143 2019-05-23 19:17:00 -07:00
spa_stats.c Restrict kstats and print real pointers 2019-04-04 18:57:06 -07:00
spa.c zpool import progress kstat 2019-05-09 10:08:05 -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 Improve rate at which new zvols are processed 2019-05-04 16:39:10 -07:00
vdev_file.c Use SEEK_{SET,CUR,END} for file seek "whence" 2019-04-25 10:17:27 -07:00
vdev_indirect_births.c Update build system and packaging 2018-05-29 16:00:33 -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 Device removal panics on 32-bit systems 2019-05-24 12:17:52 -07:00
vdev_initialize.c Add TRIM support 2019-03-29 09:13:20 -07:00
vdev_label.c Add TRIM support 2019-03-29 09:13:20 -07:00
vdev_mirror.c Cleanup nits from ab7615d92 2019-04-14 11:03:06 -07:00
vdev_missing.c OpenZFS 9102 - zfs should be able to initialize storage devices 2019-01-07 10:37:26 -08:00
vdev_queue.c Add TRIM support 2019-03-29 09:13:20 -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 ABD Vectorized raidz 2016-11-29 14:34:33 -08:00
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 Update build system and packaging 2018-05-29 16:00:33 -07:00
vdev_raidz.c Add TRIM support 2019-03-29 09:13:20 -07:00
vdev_removal.c Restrict kstats and print real pointers 2019-04-04 18:57:06 -07:00
vdev_root.c OpenZFS 9102 - zfs should be able to initialize storage devices 2019-01-07 10:37:26 -08:00
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 2019-06-06 19:10:43 -07:00
zap_leaf.c Off-by-one in zap_leaf_array_create() 2019-01-18 09:58:46 -08:00
zap_micro.c Provide more flexible object allocation interface 2019-01-10 14:37:43 -08:00
zap.c OpenZFS 9328 - zap code can take advantage of c99 2018-05-31 10:53:11 -07:00
zcp_get.c Detect and prevent mixed raw and non-raw sends 2019-03-13 11:00:43 -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 Drop local definition of MOUNT_BUSY 2019-05-24 16:43:23 -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 Remove vn_set_fs_pwd()/vn_set_pwd() (no need to be at / during insmod) 2019-05-29 16:18:14 -07:00
zfs_log.c make zil max block size tunable 2019-06-10 11:48:42 -07:00
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 Use SEEK_{SET,CUR,END} for file seek "whence" 2019-04-25 10:17:27 -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 features.kernel layout should match features.pool 2019-04-04 19:00:55 -07:00
zfs_vfsops.c Add missing trailing '\n' in printk() messages 2019-05-08 16:43:55 -07:00
zfs_vnops.c Update descriptions for vnops 2019-05-25 14:29:10 -07:00
zfs_znode.c Fix integer overflow of ZTOI(zp)->i_generation 2019-06-06 12:59:39 -07:00
zil.c make zil max block size tunable 2019-06-10 11:48:42 -07:00
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 Restrict kstats and print real pointers 2019-04-04 18:57:06 -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 Add missing checks to zpl_xattr_* functions 2018-08-02 14:03:56 -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 2019-06-10 11:48:42 -07:00