Re: hrtimer: interrupt took 6742 ns, then RT throttling and hung machine for nearly 2 seconds

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On Mon, 15 Apr 2013, Stanislav Meduna wrote:
> Unfortunately it is not easily reproducible - it happens once
> per several days and there is no obvious trigger.
> 
> Any hints?

Yes, we decoded that problem a week ago. Patch is available here:

http://www.spinics.net/lists/linux-tip-commits/msg19100.html

It's on the way to Linus tree, so it will come via the stable updates
to RT soon.

Thanks,

	tglx
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