diff options
| author | Viresh Kumar <viresh.kumar@linaro.org> | 2013-04-24 17:12:56 +0530 |
|---|---|---|
| committer | Moyster <oysterized@gmail.com> | 2016-08-26 20:22:04 +0200 |
| commit | 9576289196a2bbf411ce3f263730606d6d1782ba (patch) | |
| tree | c79bbafd6e9b82fae29ce06439ace98c836d01eb /block/genhd.c | |
| parent | c510b699c618941b9bd207a4c7c0c25ee64216ea (diff) | |
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>
(cherry picked from commit 695588f9454bdbc7c1a2fbb8a6bfdcfba6183348)
Signed-off-by: Mark Brown <broonie@linaro.org>
Signed-off-by: Stefan Guendhoer <stefan@guendhoer.com>
Diffstat (limited to 'block/genhd.c')
| -rw-r--r-- | block/genhd.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/block/genhd.c b/block/genhd.c index 36b7869de..e719836e7 100644 --- a/block/genhd.c +++ b/block/genhd.c @@ -1607,9 +1607,11 @@ 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); } @@ -1652,7 +1654,8 @@ 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); } @@ -1745,7 +1748,8 @@ 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); |