kernel-ark/block
Jens Axboe fb1e75389b block: improve queue_should_plug() by looking at IO depths
Instead of just checking whether this device uses block layer
tagging, we can improve the detection by looking at the maximum
queue depth it has reached. If that crosses 4, then deem it a
queuing device.

This is important on high IOPS devices, since plugging hurts
the performance there (it can be as much as 10-15% of the sys
time).

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2009-09-11 14:33:31 +02:00
..
as-iosched.c
blk-barrier.c
blk-core.c block: improve queue_should_plug() by looking at IO depths 2009-09-11 14:33:31 +02:00
blk-exec.c
blk-integrity.c block: fix improper kobject release in blk_integrity_unregister 2009-07-28 09:11:14 +02:00
blk-ioc.c block: prevent possible io_context->refcount overflow 2009-06-10 23:07:15 +02:00
blk-map.c
blk-merge.c scsi,block: update SCSI to handle mixed merge failures 2009-09-11 14:33:30 +02:00
blk-settings.c block: Update topology documentation 2009-08-01 10:24:35 +02:00
blk-softirq.c
blk-sysfs.c block: Allow changing max_sectors_kb above the default 512 2009-09-01 22:40:15 +02:00
blk-tag.c
blk-timeout.c
blk.h block: implement mixed merge of different failfast requests 2009-09-11 14:33:30 +02:00
bsg.c block: get rid of queue-private command filter 2009-07-01 10:56:26 +02:00
cfq-iosched.c bio: first step in sanitizing the bio->bi_rw flag testing 2009-09-11 14:33:31 +02:00
compat_ioctl.c Merge branch 'for-2.6.31' of git://git.kernel.dk/linux-2.6-block 2009-06-11 11:10:35 -07:00
deadline-iosched.c
elevator.c bio: first step in sanitizing the bio->bi_rw flag testing 2009-09-11 14:33:31 +02:00
genhd.c Send uevents for write_protect changes 2009-09-11 14:33:31 +02:00
ioctl.c
Kconfig Make SCSI SG v4 driver enabled by default and remove EXPERIMENTAL dependency, since udev depends on BSG 2009-08-04 22:10:17 +02:00
Kconfig.iosched
Makefile block: get rid of queue-private command filter 2009-07-01 10:56:26 +02:00
noop-iosched.c
scsi_ioctl.c block: call blk_scsi_ioctl_init() 2009-07-10 20:31:53 +02:00