On 03/08/2013 05:20 PM, Paul E. McKenney wrote:
> Alternatively, given that this is a debug option, how about replacing
> the schedule_timeout_uninterruptible() with something like the following:
>
> {
> unsigned long starttime = jiffies + 2;
>
> while (ULONG_CMP_LT(jiffies, starttime))
> cpu_relax();
> }
>
> That way the RCU GP kthread would never go to sleep, and thus would not
> have to wait for the timer to wake it up. If this works, then my next
> thought would be to try to get at the timer state for the wakeup fo
> schedule_timeout_uninterruptible().
It did the trick, I still see those IRQ warnings but the RCU lockup
is gone.
Thanks,
Sasha
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