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Pawel Jakub Dawidek 0cee24064a Speed up 'zfs list -t snapshot -o name -s name' 
FreeBSD #xxx:  Dramatically optimize listing snapshots when user
requests only snapshot names and wants to sort them by name, ie.
when executes:

  # zfs list -t snapshot -o name -s name

Because only name is needed we don't have to read all snapshot
properties.

Below you can find how long does it take to list 34509 snapshots
from a single disk pool before and after this change with cold and
warm cache:

    before:

        # time zfs list -t snapshot -o name -s name > /dev/null
        cold cache: 525s
        warm cache: 218s

    after:

        # time zfs list -t snapshot -o name -s name > /dev/null
        cold cache: 1.7s
        warm cache: 1.1s

NOTE: This patch only appears in FreeBSD.  If/when Illumos picks up
the change we may want to drop this patch and adopt their version.
However, for now this addresses a real issue.

Ported-by: Brian Behlendorf <behlendorf1@llnl.gov>
Issue #450
2012-06-14 09:49:04 -07:00
..
arc.c
Update ARC memory limits to account for SLUB internal fragmentation
2012-04-30 10:04:34 -07:00
bplist.c
Fix gcc missing parenthesis warnings
2010-08-31 08:38:35 -07:00
bpobj.c
Update to onnv_147
2010-08-26 14:24:34 -07:00
dbuf.c
Illumos #764: panic in zfs:dbuf_sync_list
2011-08-01 12:09:11 -07:00
ddt_zap.c
Fix stack ddt_zap_lookup()
2011-05-31 12:17:27 -07:00
ddt.c
Fix stack ddt_class_contains()
2011-05-31 12:17:27 -07:00
dmu_diff.c
Update to onnv_147
2010-08-26 14:24:34 -07:00
dmu_object.c
Add linux kernel module support
2010-08-31 13:41:58 -07:00
dmu_objset.c
Export additional dsl symbols
2012-04-11 09:26:55 -07:00
dmu_send.c
Illumos #755: dmu_recv_stream builds incomplete guid_to_ds_map
2011-10-18 11:18:14 -07:00
dmu_traverse.c
Revert "Fix stack traverse_visitbp()"
2011-05-31 12:17:27 -07:00
dmu_tx.c
Illumos #1475: zfs spill block hold can access invalid spill blkptr
2012-04-11 11:46:30 -07:00
dmu_zfetch.c
Add missing ZFS tunables
2011-05-04 10:02:37 -07:00
dmu.c
Add zfs_mdcomp_disable module option
2012-04-27 16:28:02 -07:00
dnode_sync.c
Fix dbuf eviction assertion
2010-08-31 08:38:45 -07:00
dnode.c
Improve meta data performance
2011-11-03 10:19:21 -07:00
dsl_dataset.c
Add .zfs control directory
2012-03-22 13:03:47 -07:00
dsl_deadlist.c
Update core ZFS code from build 121 to build 141.
2010-05-28 13:45:14 -07:00
dsl_deleg.c
Add linux kernel module support
2010-08-31 13:41:58 -07:00
dsl_dir.c
Add linux kernel module support
2010-08-31 13:41:58 -07:00
dsl_pool.c
Add 'dmu_tx' kstats entry
2012-02-27 08:59:10 -08:00
dsl_prop.c
Export additional dsl symbols
2012-04-11 09:26:55 -07:00
dsl_scan.c
Add missing ZFS tunables
2011-05-04 10:02:37 -07:00
dsl_synctask.c
Add linux kernel module support
2010-08-31 13:41:58 -07:00
fm.c
Add missing ZFS tunables
2011-05-04 10:02:37 -07:00
gzip.c
Fix zmod.h usage in userspace
2010-08-31 08:38:46 -07:00
lzjb.c
Fix stack lzjb
2010-08-31 08:38:49 -07:00
Makefile.in
Add .zfs control directory
2012-03-22 13:03:47 -07:00
metaslab.c
Illumos #1909: disk sync write perf regression when slog is used post oi_148
2012-04-19 16:26:29 -07:00
refcount.c
Fix gcc uninitialized variable warnings
2010-08-31 08:38:43 -07:00
rrwlock.c
Enable rrwlock.c compilation
2010-12-07 16:05:25 -08:00
sa.c
Add sa_spill_rele() interface
2012-03-07 16:28:00 -08:00
sha256.c
Add linux sha2 support
2010-08-31 13:41:59 -07:00
spa_boot.c
Add linux kernel module support
2010-08-31 13:41:58 -07:00
spa_config.c
Prototype/structure update for Linux
2011-02-10 09:27:21 -08:00
spa_errlog.c
Add linux kernel module support
2010-08-31 13:41:58 -07:00
spa_history.c
Add linux kernel module support
2010-08-31 13:41:58 -07:00
spa_misc.c
Cleanup ZFS debug infrastructure
2012-02-02 11:24:30 -08:00
spa.c
Illumos #1951: leaking a vdev when removing an l2cache device
2012-04-11 11:32:06 -07:00
space_map.c
Update core ZFS code from build 121 to build 141.
2010-05-28 13:45:14 -07:00
txg.c
Add 'dmu_tx' kstats entry
2012-02-27 08:59:10 -08:00
uberblock.c
Update core ZFS code from build 121 to build 141.
2010-05-28 13:45:14 -07:00
unique.c
Fix gcc ident pragma warnings
2010-08-27 15:34:02 -07:00
vdev_cache.c
Illumos #175: zfs vdev cache consumes excessive memory
2011-08-01 12:09:11 -07:00
vdev_disk.c
Linux 2.6.37 compat, WRITE_FLUSH_FUA
2011-06-17 14:37:26 -07:00
vdev_file.c
Illumos #1680: zfs vdev_file_io_start: validate vdev before using vdev_tsd
2012-04-11 11:23:18 -07:00
vdev_label.c
Fix gcc uninitialized variable warnings
2010-08-31 08:38:43 -07:00
vdev_mirror.c
Fix gcc c90 compliance warnings
2010-08-27 15:28:32 -07:00
vdev_missing.c
Update core ZFS code from build 121 to build 141.
2010-05-28 13:45:14 -07:00
vdev_queue.c
Add missing ZFS tunables
2011-05-04 10:02:37 -07:00
vdev_raidz.c
Fix variables named current
2010-08-31 08:38:44 -07:00
vdev_root.c
Fix gcc c90 compliance warnings
2010-08-27 15:28:32 -07:00
vdev.c
Illumos #1951: leaking a vdev when removing an l2cache device
2012-04-11 11:32:06 -07:00
zap_leaf.c
Fix gcc uninitialized variable warnings
2010-08-31 08:38:43 -07:00
zap_micro.c
Export symbols for the full ZAP API
2011-09-27 16:12:36 -07:00
zap.c
Fix rw_init() usage
2010-08-31 08:38:46 -07:00
zfs_acl.c
Linux compat 2.6.39: mount_nodev()
2011-07-01 13:36:39 -07:00
zfs_byteswap.c
Add linux kernel module support
2010-08-31 13:41:58 -07:00
zfs_ctldir.c
Account for .zfs ctldir inodes
2012-03-22 15:43:55 -07:00
zfs_debug.c
Use spl_debug_* helpers
2012-02-09 16:37:48 -08:00
zfs_dir.c
Add .zfs control directory
2012-03-22 13:03:47 -07:00
zfs_fm.c
Illumos #1951: leaking a vdev when removing an l2cache device
2012-04-11 11:32:06 -07:00
zfs_fuid.c
Drop HAVE_XVATTR macros
2011-03-02 11:44:34 -08:00
zfs_ioctl.c
Speed up 'zfs list -t snapshot -o name -s name'
2012-06-14 09:49:04 -07:00
zfs_log.c
Drop HAVE_XVATTR macros
2011-03-02 11:44:34 -08:00
zfs_onexit.c
Add linux kernel device support
2010-08-31 13:41:50 -07:00
zfs_replay.c
Use Linux ATTR_ versions
2011-03-03 11:29:15 -08:00
zfs_rlock.c
Range lock performance improvements
2011-03-08 12:44:06 -08:00
zfs_sa.c
Use SA_HDL_PRIVATE for SA xattrs
2012-03-02 13:20:48 -08:00
zfs_vfsops.c
Linux 3.4 compat, d_make_root() replaces d_alloc_root()
2012-06-11 10:04:49 -07:00
zfs_vnops.c
Add .zfs control directory
2012-03-22 13:03:47 -07:00
zfs_znode.c
Add .zfs control directory
2012-03-22 13:03:47 -07:00
zil.c
Make zil_slog_limit a tunable module parameter.
2012-06-12 08:45:53 -07:00
zio_checksum.c
Update core ZFS code from build 121 to build 141.
2010-05-28 13:45:14 -07:00
zio_compress.c
Update core ZFS code from build 121 to build 141.
2010-05-28 13:45:14 -07:00
zio_inject.c
Add missing ZFS tunables
2011-05-04 10:02:37 -07:00
zio.c
Illumos #1909: disk sync write perf regression when slog is used post oi_148
2012-04-19 16:26:29 -07:00
zle.c
Update core ZFS code from build 121 to build 141.
2010-05-28 13:45:14 -07:00
zpl_ctldir.c
Linux 3.3 compat, iops->create()/mkdir()/mknod()
2012-04-30 12:52:38 -07:00
zpl_export.c
Add .zfs control directory
2012-03-22 13:03:47 -07:00
zpl_file.c
Support the fallocate() file operation.
2012-02-09 16:19:32 -08:00
zpl_inode.c
Linux 3.3 compat, iops->create()/mkdir()/mknod()
2012-04-30 12:52:38 -07:00
zpl_super.c
Add .zfs control directory
2012-03-22 13:03:47 -07:00
zpl_xattr.c
Add missing NULL in zpl_xattr_handlers
2012-03-15 15:18:29 -07:00
zrlock.c
Export ZFS symbols needed by Lustre.
2010-09-17 16:24:15 -07:00
zvol.c
Add zvol_inhibit_dev module option.
2012-06-13 17:05:16 -07:00