linux-kernel - Re: frequent lockups in 3.18rc4

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Message-ID: <20141116100636.GA340@x4>
Date:	Sun, 16 Nov 2014 11:06:36 +0100
From:	Markus Trippelsdorf <markus@...ppelsdorf.de>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Dave Jones <davej@...hat.com>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	the arch/x86 maintainers <x86@...nel.org>
Subject: Re: frequent lockups in 3.18rc4

On 2014.11.15 at 22:33 -0800, Linus Torvalds wrote:
> On Sat, Nov 15, 2014 at 5:40 PM, Dave Jones <davej@...hat.com> wrote:
> >  >
> >  > I'll try that next, and check in on it tomorrow.
> >
> > No luck. Died even faster this time.
> 
> Yeah, and your other lockups haven't even been TLB related. Not that
> they look like anything else *either*.
> 
> I have no ideas left. I'd go for a bisection

Before starting a bisection you could try and disable transparent_hugepages.
There are strange bugs, that were introduced during this merge-window, in this
area. See: https://lkml.org/lkml/2014/11/4/144
https://lkml.org/lkml/2014/11/4/904
http://thread.gmane.org/gmane.linux.kernel.mm/124451

-- 
Markus
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