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6839eed23e
freebsd-nq/include/sys
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Brian Behlendorf 6839eed23e Use 'noop' IO Scheduler 
Initial testing has shown the the right IO scheduler to use under Linux
is noop.  This strikes the ideal balance by allowing the zfs elevator
to do all request ordering and prioritization.  While allowing the
Linux elevator to do the maximum front/back merging allowed by the
physical device.  This yields the largest possible requests for the
device with the lowest total overhead.

While 'noop' should be right for your system you can choose a different
IO scheduler with the 'zfs_vdev_scheduler' option.  You may set this
value to any of the standard Linux schedulers: noop, cfq, deadline,
anticipatory.  In addition, if you choose 'none' zfs will not attempt
to change the IO scheduler for the block device.
2011-02-10 09:27:22 -08:00
..
fm Minimal libshare infrastructure 2011-02-04 16:14:29 -08:00
fs Minimal libshare infrastructure 2011-02-04 16:14:29 -08:00
arc.h Support custom build directories and move includes 2010-09-08 12:38:56 -07:00
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
blkdev.h Linux 2.6.36 compat, blk_* macros removed 2010-11-10 17:00:40 -08:00
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 Support custom build directories and move includes 2010-09-08 12:38:56 -07:00
dmu_zfetch.h Support custom build directories and move includes 2010-09-08 12:38:56 -07:00
dmu.h Remove dmu_write_pages() support 2011-02-10 09:27:21 -08:00
dnode.h Support custom build directories and move includes 2010-09-08 12:38:56 -07:00
dsl_dataset.h Support custom build directories and move includes 2010-09-08 12:38:56 -07:00
dsl_deadlist.h Support custom build directories and move includes 2010-09-08 12:38:56 -07:00
dsl_deleg.h Support custom build directories and move includes 2010-09-08 12:38:56 -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 Support custom build directories and move includes 2010-09-08 12:38:56 -07:00
Makefile.am Add Hooks for Linux File Operations 2011-02-10 09:27:21 -08:00
Makefile.in Add Hooks for Linux File Operations 2011-02-10 09:27:21 -08:00
metaslab_impl.h Support custom build directories and move includes 2010-09-08 12:38:56 -07:00
metaslab.h Support custom build directories and move includes 2010-09-08 12:38:56 -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 Support custom build directories and move includes 2010-09-08 12:38:56 -07:00
spa_boot.h Support custom build directories and move includes 2010-09-08 12:38:56 -07:00
spa_impl.h Support custom build directories and move includes 2010-09-08 12:38:56 -07:00
spa.h Support custom build directories and move includes 2010-09-08 12:38:56 -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 Support custom build directories and move includes 2010-09-08 12:38:56 -07:00
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 Use 'noop' IO Scheduler 2011-02-10 09:27:22 -08:00
vdev_file.h Support custom build directories and move includes 2010-09-08 12:38:56 -07:00
vdev_impl.h Support custom build directories and move includes 2010-09-08 12:38:56 -07:00
vdev.h Support custom build directories and move includes 2010-09-08 12:38:56 -07:00
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 Support custom build directories and move includes 2010-09-08 12:38:56 -07:00
zfs_acl.h Prototype/structure update for Linux 2011-02-10 09:27:21 -08:00
zfs_context.h Add Linux Compat Infrastructure 2011-02-10 09:25:10 -08:00
zfs_debug.h Support custom build directories and move includes 2010-09-08 12:38:56 -07:00
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 Support custom build directories and move includes 2010-09-08 12:38:56 -07:00
zfs_onexit.h Support custom build directories and move includes 2010-09-08 12:38:56 -07:00
zfs_rlock.h Support custom build directories and move includes 2010-09-08 12:38:56 -07:00
zfs_sa.h Support custom build directories and move includes 2010-09-08 12:38:56 -07:00
zfs_stat.h Support custom build directories and move includes 2010-09-08 12:38:56 -07:00
zfs_vfsops.h Prototype/structure update for Linux 2011-02-10 09:27:21 -08:00
zfs_vnops.h Prototype/structure update for Linux 2011-02-10 09:27:21 -08:00
zfs_znode.h Add mmap(2) support 2011-02-10 09:27:21 -08:00
zil_impl.h Support custom build directories and move includes 2010-09-08 12:38:56 -07:00
zil.h Support custom build directories and move includes 2010-09-08 12:38:56 -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 Initial zio delay timing 2010-10-12 14:55:02 -07:00
zpl.h Add Hooks for Linux File Operations 2011-02-10 09:27:21 -08:00
zrlock.h Support custom build directories and move includes 2010-09-08 12:38:56 -07:00
zvol.h Support custom build directories and move includes 2010-09-08 12:38:56 -07:00