summaryrefslogtreecommitdiff
path: root/block/genhd.c
diff options
context:
space:
mode:
authorViresh Kumar <viresh.kumar@linaro.org>2013-04-24 17:12:56 +0530
committerTejun Heo <tj@kernel.org>2013-05-14 10:50:07 -0700
commit695588f9454bdbc7c1a2fbb8a6bfdcfba6183348 (patch)
tree4a9963696a82937133acaa8ea682c88ff3d798af /block/genhd.c
parentbbb47bdeae756f04b896b55b51f230f3eb21f207 (diff)
downloadkernel-695588f9454bdbc7c1a2fbb8a6bfdcfba6183348.tar.gz
block: queue work on power efficient wq
Block layer uses workqueues for multiple purposes. There is no real dependency of scheduling these on the cpu which scheduled them. On a idle system, it is observed that and idle cpu wakes up many times just to service this work. It would be better if we can schedule it on a cpu which the scheduler believes to be the most appropriate one. This patch replaces normal workqueues with power efficient versions. Cc: Jens Axboe <axboe@kernel.dk> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'block/genhd.c')
-rw-r--r--block/genhd.c12
1 files changed, 8 insertions, 4 deletions
diff --git a/block/genhd.c b/block/genhd.c
index 20625eed5511..e9094b375c05 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -1489,9 +1489,11 @@ static void __disk_unblock_events(struct gendisk *disk, bool check_now)
intv = disk_events_poll_jiffies(disk);
set_timer_slack(&ev->dwork.timer, intv / 4);
if (check_now)
- queue_delayed_work(system_freezable_wq, &ev->dwork, 0);
+ queue_delayed_work(system_freezable_power_efficient_wq,
+ &ev->dwork, 0);
else if (intv)
- queue_delayed_work(system_freezable_wq, &ev->dwork, intv);
+ queue_delayed_work(system_freezable_power_efficient_wq,
+ &ev->dwork, intv);
out_unlock:
spin_unlock_irqrestore(&ev->lock, flags);
}
@@ -1534,7 +1536,8 @@ void disk_flush_events(struct gendisk *disk, unsigned int mask)
spin_lock_irq(&ev->lock);
ev->clearing |= mask;
if (!ev->block)
- mod_delayed_work(system_freezable_wq, &ev->dwork, 0);
+ mod_delayed_work(system_freezable_power_efficient_wq,
+ &ev->dwork, 0);
spin_unlock_irq(&ev->lock);
}
@@ -1627,7 +1630,8 @@ static void disk_check_events(struct disk_events *ev,
intv = disk_events_poll_jiffies(disk);
if (!ev->block && intv)
- queue_delayed_work(system_freezable_wq, &ev->dwork, intv);
+ queue_delayed_work(system_freezable_power_efficient_wq,
+ &ev->dwork, intv);
spin_unlock_irq(&ev->lock);