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Matthew Ahrens d9b4bf0665 fat zap should prefetch when iterating 
When iterating over a ZAP object, we're almost always certain to iterate
over the entire object. If there are multiple leaf blocks, we can
realize a performance win by issuing reads for all the leaf blocks in
parallel when the iteration begins.

For example, if we have 10,000 snapshots, "zfs destroy -nv
pool/fs@1%9999" can take 30 minutes when the cache is cold. This change
provides a >3x performance improvement, by issuing the reads for all ~64
blocks of each ZAP object in parallel.

Reviewed-by: Andreas Dilger <andreas.dilger@whamcloud.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Matthew Ahrens <mahrens@delphix.com>
External-issue: DLPX-58347
Closes #8862
2019-06-12 13:13:09 -07:00
..
abd.c
single-chunk scatter ABDs can be treated as linear
2019-06-11 09:02:31 -07:00
aggsum.c
OpenZFS 9688 - aggsum_fini leaks memory
2018-10-19 12:08:03 -07:00
arc.c
Target ARC size can get reduced to arc_c_min
2019-06-12 13:06:55 -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
fat zap should prefetch when iterating
2019-06-12 13:13:09 -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
fat zap should prefetch when iterating
2019-06-12 13:13:09 -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
Fix typo in vdev_raidz_math.c
2019-06-12 13:03:33 -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
fat zap should prefetch when iterating
2019-06-12 13:13:09 -07:00
zap.c
fat zap should prefetch when iterating
2019-06-12 13:13:09 -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
single-chunk scatter ABDs can be treated as linear
2019-06-11 09:02:31 -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