Etienne Dechamps ee5fd0bb80 Set zvol discard_granularity to the volblocksize. ... Currently, zvols have a discard granularity set to 0, which suggests to the upper layer that discard requests of arbirarily small size and alignment can be made efficiently. In practice however, ZFS does not handle unaligned discard requests efficiently: indeed, it is unable to free a part of a block. It will write zeros to the specified range instead, which is both useless and inefficient (see dnode_free_range). With this patch, zvol block devices expose volblocksize as their discard granularity, so the upper layer is aware that it's not supposed to send discard requests smaller than volblocksize. Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes #862		2012-08-07 14:55:31 -07:00
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fm	Set zvol discard_granularity to the volblocksize.	2012-08-07 14:55:31 -07:00
fs	Set zvol discard_granularity to the volblocksize.	2012-08-07 14:55:31 -07:00
arc.h	Linux 3.1 compat, super_block->s_shrink	2012-01-11 11:46:02 -08:00
avl_impl.h	Support custom build directories and move includes	2010-09-08 12:38:56 -07:00
avl.h	Support custom build directories and move includes	2010-09-08 12:38:56 -07:00
bplist.h	Support custom build directories and move includes	2010-09-08 12:38:56 -07:00
bpobj.h	Support custom build directories and move includes	2010-09-08 12:38:56 -07:00
dbuf.h	Support custom build directories and move includes	2010-09-08 12:38:56 -07:00
ddt.h	Support custom build directories and move includes	2010-09-08 12:38:56 -07:00
dmu_impl.h	Support custom build directories and move includes	2010-09-08 12:38:56 -07:00
dmu_objset.h	Support custom build directories and move includes	2010-09-08 12:38:56 -07:00
dmu_traverse.h	Support custom build directories and move includes	2010-09-08 12:38:56 -07:00
dmu_tx.h	Add --enable-debug-dmu-tx configure option	2012-03-23 12:25:17 -07:00
dmu_zfetch.h	Add missing ZFS tunables	2011-05-04 10:02:37 -07:00
dmu.h	Illumos #1644, #1645, #1646, #1647, #1708	2012-07-31 09:25:30 -07:00
dnode.h	Support custom build directories and move includes	2010-09-08 12:38:56 -07:00
dsl_dataset.h	Illumos #1644, #1645, #1646, #1647, #1708	2012-07-31 09:25:30 -07:00
dsl_deadlist.h	Support custom build directories and move includes	2010-09-08 12:38:56 -07:00
dsl_deleg.h	Illumos #1644, #1645, #1646, #1647, #1708	2012-07-31 09:25:30 -07:00
dsl_dir.h	Support custom build directories and move includes	2010-09-08 12:38:56 -07:00
dsl_pool.h	Prototype/structure update for Linux	2011-02-10 09:27:21 -08:00
dsl_prop.h	Support custom build directories and move includes	2010-09-08 12:38:56 -07:00
dsl_scan.h	Support custom build directories and move includes	2010-09-08 12:38:56 -07:00
dsl_synctask.h	Support custom build directories and move includes	2010-09-08 12:38:56 -07:00
efi_partition.h	Move partition scanning from userspace to module.	2012-07-17 09:17:31 -07:00
Makefile.am	Add .zfs control directory	2012-03-22 13:03:47 -07:00
Makefile.in	Set zvol discard_granularity to the volblocksize.	2012-08-07 14:55:31 -07:00
metaslab_impl.h	Illumos #1051: zfs should handle imbalanced luns	2011-08-01 12:09:11 -07:00
metaslab.h	Illumos #1051: zfs should handle imbalanced luns	2011-08-01 12:09:11 -07:00
nvpair_impl.h	Support custom build directories and move includes	2010-09-08 12:38:56 -07:00
nvpair.h	Support custom build directories and move includes	2010-09-08 12:38:56 -07:00
refcount.h	Support custom build directories and move includes	2010-09-08 12:38:56 -07:00
rrwlock.h	Support custom build directories and move includes	2010-09-08 12:38:56 -07:00
sa_impl.h	Support custom build directories and move includes	2010-09-08 12:38:56 -07:00
sa.h	Add sa_spill_rele() interface	2012-03-07 16:28:00 -08:00
spa_boot.h	Support custom build directories and move includes	2010-09-08 12:38:56 -07:00
spa_impl.h	Illumos #1748: desire support for reguid in zfs	2012-07-11 13:08:56 -07:00
spa.h	Illumos #1748: desire support for reguid in zfs	2012-07-11 13:08:56 -07:00
space_map.h	Support custom build directories and move includes	2010-09-08 12:38:56 -07:00
txg_impl.h	Support custom build directories and move includes	2010-09-08 12:38:56 -07:00
txg.h	Add API to wait for pending commit callbacks	2011-02-16 11:20:06 -08:00
u8_textprep_data.h	Support custom build directories and move includes	2010-09-08 12:38:56 -07:00
u8_textprep.h	Support custom build directories and move includes	2010-09-08 12:38:56 -07:00
uberblock_impl.h	Support custom build directories and move includes	2010-09-08 12:38:56 -07:00
uberblock.h	Support custom build directories and move includes	2010-09-08 12:38:56 -07:00
uio_impl.h	Add basic uio support	2011-02-10 09:21:43 -08:00
unique.h	Support custom build directories and move includes	2010-09-08 12:38:56 -07:00
uuid.h	Support custom build directories and move includes	2010-09-08 12:38:56 -07:00
vdev_disk.h	Linux 2.6.x compat, blkdev_compat.h	2011-02-23 12:29:38 -08:00
vdev_file.h	Support custom build directories and move includes	2010-09-08 12:38:56 -07:00
vdev_impl.h	Illumos #1951: leaking a vdev when removing an l2cache device	2012-04-11 11:32:06 -07:00
vdev.h	Illumos #1949, #1953	2012-07-11 13:33:31 -07:00
xvattr.h	Add xvattr support	2011-03-02 11:43:50 -08:00
zap_impl.h	Support custom build directories and move includes	2010-09-08 12:38:56 -07:00
zap_leaf.h	Support custom build directories and move includes	2010-09-08 12:38:56 -07:00
zap.h	Export symbols for the full ZAP API	2011-09-27 16:12:36 -07:00
zfs_acl.h	Fix build failures on PaX/GRSecurity patched kernels	2012-07-17 09:22:43 -07:00
zfs_context.h	Cleanup ZFS debug infrastructure	2012-02-02 11:24:30 -08:00
zfs_ctldir.h	Use ULL suffix in constants	2012-07-10 11:31:55 -07:00
zfs_debug.h	Cleanly support debug packages	2012-02-27 14:08:17 -08:00
zfs_dir.h	Prototype/structure update for Linux	2011-02-10 09:27:21 -08:00
zfs_fuid.h	Prototype/structure update for Linux	2011-02-10 09:27:21 -08:00
zfs_ioctl.h	Speed up 'zfs list -t snapshot -o name -s name'	2012-06-14 09:49:04 -07:00
zfs_onexit.h	Support custom build directories and move includes	2010-09-08 12:38:56 -07:00
zfs_rlock.h	Range lock performance improvements	2011-03-08 12:44:06 -08:00
zfs_sa.h	Implement SA based xattrs	2011-11-28 15:45:51 -08:00
zfs_stat.h	Support custom build directories and move includes	2010-09-08 12:38:56 -07:00
zfs_vfsops.h	Add .zfs control directory	2012-03-22 13:03:47 -07:00
zfs_vnops.h	Cleanup mmap(2) writes	2011-08-02 10:34:55 -07:00
zfs_znode.h	Add .zfs control directory	2012-03-22 13:03:47 -07:00
zil_impl.h	Support custom build directories and move includes	2010-09-08 12:38:56 -07:00
zil.h	Add ZIL statistics.	2012-06-29 09:56:51 -07:00
zio_checksum.h	Support custom build directories and move includes	2010-09-08 12:38:56 -07:00
zio_compress.h	Support custom build directories and move includes	2010-09-08 12:38:56 -07:00
zio_impl.h	Support custom build directories and move includes	2010-09-08 12:38:56 -07:00
zio.h	Illumos #734: Use taskq_dispatch_ent() interface	2011-12-14 09:19:30 -08:00
zpl.h	Linux 3.3 compat, iops->create()/mkdir()/mknod()	2012-04-30 12:52:38 -07:00
zrlock.h	Support custom build directories and move includes	2010-09-08 12:38:56 -07:00
zvol.h	Linux 2.6.x compat, blkdev_compat.h	2011-02-23 12:29:38 -08:00