Re: stop_machine lockup issue in 3.9.y.

From: Tejun Heo
Date: Thu Jun 06 2013 - 17:18:02 EST

On Thu, Jun 06, 2013 at 02:15:40PM -0700, Ben Greear wrote:
> >First of all, kudos for tracking the issue down. While the removal of
> >looping limit in softirq handling was the direct cause for making the
> >problem visible, it's very bothering that we have softirq runaway.
> >Finding out the perpetrator shouldn't be hard. Something like the
> >following should work (untested). Once we know which softirq (prolly
> >the network one), we can dig deeper.
> The patch below assumes my fix is not in the code, right?


> I'll work on this, but it will probably be next week before
> I have time...gotta catch up on some other things first.

Thanks a lot for hunting this down!

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