Re: [ANNOUNCE] 3.0-rt6
From: Peter Zijlstra <peterz@infradead.org>
Date: 2011-08-04 09:43:31
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On Wed, 2011-08-03 at 23:34 -0700, Fernando Lopez-Lezcano wrote:
[ 117.026009] [<ffffffff814ef322>] _raw_spin_lock+0x45/0x79 [ 117.026009] [<ffffffff8107b6f1>] ? __run_posix_cpu_timers+0x8f/0x353 [ 117.026009] [<ffffffff8107b6f1>] __run_posix_cpu_timers+0x8f/0x353
I think its this one, could you confirm? --- Index: linux-2.6/kernel/posix-cpu-timers.c ===================================================================
--- linux-2.6.orig/kernel/posix-cpu-timers.c
+++ linux-2.6/kernel/posix-cpu-timers.c@@ -1288,10 +1288,11 @@ static inline int fastpath_timer_check(s sig = tsk->signal; if (sig->cputimer.running) { struct task_cputime group_sample; + unsigned long flags; - raw_spin_lock(&sig->cputimer.lock); + raw_spin_lock_irqsave(&sig->cputimer.lock, flags); group_sample = sig->cputimer.cputime; - raw_spin_unlock(&sig->cputimer.lock); + raw_spin_unlock_irqrestore(&sig->cputimer.lock, flags); if (task_cputime_expired(&group_sample, &sig->cputime_expires)) return 1;