Re: [feature] automatically detect hung TASK_UNINTERRUPTIBLE tasks

[Ingo Molnar]

* Rafael J. Wysocki <rjw@xxxxxxx> wrote:

> > > Er, it won't play well if that happen when tasks are frozen for 
> > > suspend.
> > 
> > right now any suspend attempt times out after 20 seconds:
> > 
> >   $ grep TIMEOUT kernel/power/process.c
> >   #define TIMEOUT (20 * HZ)
> >           end_time = jiffies + TIMEOUT;
> 
> This is the timeout for freezing tasks, but if the freezing succeeds, 
> they can stay in TASK_UNINTERRUPTIBLE for quite some more time, 
> especially during a hibernation (the tasks stay frozen until we power 
> off the system after saving the image).

ah, ok. So this was a live bug - thanks for the clarification.

	Ingo
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