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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>
hifive-unleashed-5.1
Thomas Gleixner 2011-02-23 23:52:21 +00:00
parent 0c4602ff88
commit 8eb90c30e0
1 changed files with 4 additions and 1 deletions
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5
kernel/sched.c
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@ -2224,7 +2224,10 @@ unsigned long wait_task_inactive(struct task_struct *p, long match_state)
* yield - it could be a while.
*/
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;
}