linux-kernel - Re: Hard LOCKUP with 2.6.32.28 (maybe scheduler/tick related?)

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Date:	Mon, 31 Jan 2011 15:21:27 +0100
From:	Sebastian Färber <faerber@...il.com>
To:	Don Zickus <dzickus@...hat.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: Hard LOCKUP with 2.6.32.28 (maybe scheduler/tick related?)

Hi Don,

>
> Your attached 'crash' details had another stacktrace first.  That one
> shows the nmi_watchdog triggering because a spin_lock is spinning forever
> in 'd_real_path'.  I couldn't find that code in any upstream tree, then
> again I was too lazy to clone the stable trees.  So I don't know what the
> exact problem is, but if you look through the git history of 2.6.32.28 and
> revert things that relate to 'd_real_path', you can probably workaround
> the problem for now, until someone who knows that stuff better than me can
> give you a better answer.

Thanks for the pointer. The 'd_real_path' function is part of
grsecurity, i'll see if they
can help :-)

Regards,

Sebastian
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