Commit 8eb90c30 authored Feb 23, 2011 by Thomas Gleixner

sched: Switch wait_task_inactive to schedule_hrtimeout()



When we force thread hard and soft interrupts the startup of ksoftirqd
would hang in kthread_bind() when wait_task_inactive() calls
schedule_timeout_uninterruptible() because there is no softirq yet
which will wake us up.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
LKML-Reference: <20110223234956.677109139@linutronix.de>

parent 0c4602ff

kernel/sched.c

+4 −1

Original line number	Original line	Diff line number	Diff line
	@@ -2224,7 +2224,10 @@ unsigned long wait_task_inactive(struct task_struct *p, long match_state)
	* yield - it could be a while.		* yield - it could be a while.
	*/		*/
	if (unlikely(on_rq)) {		if (unlikely(on_rq)) {
	schedule_timeout_uninterruptible(1);		ktime_t to = ktime_set(0, NSEC_PER_SEC/HZ);

			set_current_state(TASK_UNINTERRUPTIBLE);
			schedule_hrtimeout(&to, HRTIMER_MODE_REL);
	continue;		continue;
	}		}