Tejun Heo 41cad6ab2c cfq-iosched: convert cfq_group_slice() to use cfqg->vfraction ...

cfq_group_slice() calculates slice by taking a fraction of
cfq_target_latency according to the ratio of cfqg->weight against
service_tree->total_weight.  This currently works only because all
cfqgs are treated to be at the same level.

To prepare for proper hierarchy support, convert cfq_group_slice() to
base the calculation on cfqg->vfraction.  As cfqg->vfraction is always
a fraction of 1 and represents the fraction allocated to the cfqg with
hierarchy considered, the slice can be simply calculated by
multiplying cfqg->vfraction to cfq_target_latency (with fixed point
shift factored in).

As vfraction calculation currently treats all non-root cfqgs as
children of the root cfqg, this patch doesn't introduce noticeable
behavior difference.

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Vivek Goyal <vgoyal@redhat.com>

2013-01-09 08:05:11 -08:00

..

partitions

Merge branch 'for-3.8/drivers' of git://git.kernel.dk/linux-block

2012-12-17 13:39:11 -08:00

blk-cgroup.c

cfq-iosched: add leaf_weight

2013-01-09 08:05:10 -08:00

blk-cgroup.h

cfq-iosched: add leaf_weight

2013-01-09 08:05:10 -08:00

blk-core.c

block: export block_unplug tracepoint

2012-12-14 20:49:27 +01:00

blk-exec.c

Merge branch 'for-3.8/core' of git://git.kernel.dk/linux-block

2012-12-17 08:27:23 -08:00

blk-flush.c

…

blk-integrity.c

…

blk-ioc.c

block: uninitialized ioc->nr_tasks triggers WARN_ON

2012-08-01 12:17:27 +02:00

blk-iopoll.c

…

blk-lib.c

block: add plug for blkdev_issue_discard

2012-12-14 20:46:04 +01:00

blk-map.c

…

blk-merge.c

block: Implement support for WRITE SAME

2012-09-20 14:31:45 +02:00

blk-settings.c

block: discard granularity might not be power of 2

2012-12-14 20:46:04 +01:00

blk-softirq.c

sched, block: Unify cache detection

2012-01-27 13:28:48 +01:00

blk-sysfs.c

block: Rename queue dead flag

2012-12-06 14:30:58 +01:00

blk-tag.c

block/blk-tag.c: Remove useless kfree

2012-09-12 22:25:12 +02:00

blk-throttle.c

block: Rename queue dead flag

2012-12-06 14:30:58 +01:00

blk-timeout.c

block: Drop dead function blk_abort_queue()

2012-06-15 08:46:23 +02:00

blk.h

block: Avoid that request_fn is invoked on a dead queue

2012-12-06 14:32:01 +01:00

bsg-lib.c

bsg: Remove unused function bsg_goose_queue()

2012-12-06 14:33:02 +01:00

bsg.c

bsg: fix sysfs link remove warning

2012-02-08 20:02:03 +01:00

cfq-iosched.c

cfq-iosched: convert cfq_group_slice() to use cfqg->vfraction

2013-01-09 08:05:11 -08:00

compat_ioctl.c

block: Add BLKROTATIONAL ioctl

2012-01-11 16:29:31 +01:00

deadline-iosched.c

deadline: Allow 0ms deadline latency, increase the read speed

2012-12-09 19:19:23 +01:00

elevator.c

block: recursive merge requests

2012-11-09 08:44:27 +01:00

genhd.c

Merge branch 'for-3.8/drivers' of git://git.kernel.dk/linux-block

2012-12-17 13:39:11 -08:00

ioctl.c

Merge branch 'for-3.7/core' of git://git.kernel.dk/linux-block

2012-10-11 09:04:23 +09:00

Kconfig

percpu_rw_semaphore: introduce CONFIG_PERCPU_RWSEM

2012-12-17 17:15:18 -08:00

Kconfig.iosched

blkcg: make CONFIG_BLK_CGROUP bool

2012-03-06 21:27:21 +01:00

Makefile

separate partition format handling from generic code

2012-01-03 22:54:06 -05:00

noop-iosched.c

elevator: make elevator_init_fn() return 0/-errno

2012-03-06 21:27:21 +01:00

partition-generic.c

block: add partition resize function to blkpg ioctl

2012-08-01 12:24:18 +02:00

scsi_ioctl.c

scsi: Silence unnecessary warnings about ioctl to partition

2012-06-15 12:52:46 +02:00