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| author | Thomas Gleixner <tglx@linutronix.de> | 2011-02-23 23:52:21 +0000 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2011-02-25 20:24:22 +0100 |
| commit | 8eb90c30e0e815a1308828352eabd03ca04229dd (patch) | |
| tree | cc41c26975f8ab4e9f3ed734f1bdad9b3774685a /kernel/sched.c | |
| parent | 0c4602ff88d6d6ef0ee6d228ee9acaa6448ff6f5 (diff) | |
| download | lwn-8eb90c30e0e815a1308828352eabd03ca04229dd.tar.gz lwn-8eb90c30e0e815a1308828352eabd03ca04229dd.zip | |
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>
Diffstat (limited to 'kernel/sched.c')
| -rw-r--r-- | kernel/sched.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/kernel/sched.c b/kernel/sched.c index 18d38e4ec7ba..66ca5d9ba83c 100644 --- a/kernel/sched.c +++ b/kernel/sched.c @@ -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; } |