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| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2009-11-27 15:44:43 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-12-09 10:03:04 +0100 |
| commit | ab19cb23313733c55e0517607844b86720b35f5f (patch) | |
| tree | 0d6780ab6d1e1e97b624e978ed3418e5786646d4 /kernel | |
| parent | 5afcdab706d6002cb02b567ba46e650215e694e8 (diff) | |
| download | lwn-ab19cb23313733c55e0517607844b86720b35f5f.tar.gz lwn-ab19cb23313733c55e0517607844b86720b35f5f.zip | |
sched: Clean up ttwu() rq locking
Since set_task_clock() doesn't rely on rq->clock anymore we can simplyfy
the mess in ttwu().
Optimize things a bit by not fiddling with the IRQ state there.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/sched.c | 13 |
1 files changed, 5 insertions, 8 deletions
diff --git a/kernel/sched.c b/kernel/sched.c index 1f9c6d99f15d..c92670f8e097 100644 --- a/kernel/sched.c +++ b/kernel/sched.c @@ -2371,17 +2371,14 @@ static int try_to_wake_up(struct task_struct *p, unsigned int state, if (task_contributes_to_load(p)) rq->nr_uninterruptible--; p->state = TASK_WAKING; - task_rq_unlock(rq, &flags); + __task_rq_unlock(rq); cpu = select_task_rq(p, SD_BALANCE_WAKE, wake_flags); - if (cpu != orig_cpu) { - local_irq_save(flags); - rq = cpu_rq(cpu); - update_rq_clock(rq); + if (cpu != orig_cpu) set_task_cpu(p, cpu); - local_irq_restore(flags); - } - rq = task_rq_lock(p, &flags); + + rq = __task_rq_lock(p); + update_rq_clock(rq); WARN_ON(p->state != TASK_WAKING); cpu = task_cpu(p); |