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| author |   Ingo Molnar <mingo@elte.hu> | 2011-04-14 08:50:37 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2011-04-14 08:51:07 +0200 |
| commit | a4c98f8bbeafee12c979c90743f6fda94f7515c7 (patch) | |
| tree | 3dda24b8a2ec42ab7b42845cb68c8b6e1b0d501f /kernel/sched.c | |
| parent | sched: Eliminate dead code from wakeup_gran() (diff) | |
| parent | Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mjg59/platform-drivers-x86 (diff) | |
| download | linux-dev-a4c98f8bbeafee12c979c90743f6fda94f7515c7.tar.xz linux-dev-a4c98f8bbeafee12c979c90743f6fda94f7515c7.zip | |
Merge branch 'linus' into sched/locking
Merge reason: Pick up this upstream commit:
6631e635c65d: block: don't flush plugged IO on forced preemtion scheduling
As it modifies the scheduler and we'll queue up dependent patches.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/sched.c')
| -rw-r--r-- | kernel/sched.c | 20 |
1 files changed, 10 insertions, 10 deletions
diff --git a/kernel/sched.c b/kernel/sched.c index 48013633d792..a187c3fe027b 100644 --- a/kernel/sched.c +++ b/kernel/sched.c @@ -4111,20 +4111,20 @@ need_resched: try_to_wake_up_local(to_wakeup); } deactivate_task(rq, prev, DEQUEUE_SLEEP); + + /* + * If we are going to sleep and we have plugged IO queued, make + * sure to submit it to avoid deadlocks. + */ + if (blk_needs_flush_plug(prev)) { + raw_spin_unlock(&rq->lock); + blk_flush_plug(prev); + raw_spin_lock(&rq->lock); + } } switch_count = &prev->nvcsw; } - /* - * If we are going to sleep and we have plugged IO queued, make - * sure to submit it to avoid deadlocks. - */ - if (prev->state != TASK_RUNNING && blk_needs_flush_plug(prev)) { - raw_spin_unlock(&rq->lock); - blk_flush_plug(prev); - raw_spin_lock(&rq->lock); - } - pre_schedule(rq, prev); if (unlikely(!rq->nr_running)) |