Re: [PATCH 10/14] time: Fix invalid wakeup in alarmtimer_do_nsleep

[Thomas Gleixner]

On Thu, 29 Aug 2013, Libin wrote:

> If thread is preempted before calling set_current_state(TASK_INTERRUPTIBLE),
> and the other thread set the condition followed with wake_up_process. After
> that when this thread is re-scheduled, calling set_current_state to set itself
> as state TASK_INTERRUPTIBLE, if it is preempted again after that and before
> __set_current_state(TASK_RUNNING), it triggers the invalid wakeup problem.
> 
> To solve this problem, using preempt_disable() to bound the operaion that
> setting the task state and the conditions(set by the wake thread) validation.

See the reply to the hrtimer patch. You're solving a non issue.

Thanks,

	tglx
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