netdev - Re: WARNING: at mm/slub.c:3357, kernel BUG at mm/slub.c:3413

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Message-ID: <20111121082445.GD1625@x4.trippels.de>
Date:	Mon, 21 Nov 2011 09:24:45 +0100
From:	Markus Trippelsdorf <markus@...ppelsdorf.de>
To:	"Alex,Shi" <alex.shi@...el.com>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	Christoph Lameter <cl@...ux-foundation.org>,
	Pekka Enberg <penberg@...nel.org>,
	Matt Mackall <mpm@...enic.com>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	Eric Dumazet <eric.dumazet@...il.com>
Subject: Re: WARNING: at mm/slub.c:3357, kernel BUG at mm/slub.c:3413

On 2011.11.21 at 09:05 +0100, Markus Trippelsdorf wrote:
> On 2011.11.21 at 08:44 +0800, Alex,Shi wrote:
> > On Fri, 2011-11-18 at 20:02 +0800, Markus Trippelsdorf wrote:
> > > On 2011.11.18 at 09:54 +0100, Markus Trippelsdorf wrote:
> > > > On 2011.11.18 at 16:43 +0800, Alex,Shi wrote:
> > > > > > > 
> > > > > > > The dirty flag comes from a bunch of unrelated xfs patches from Christoph, that
> > > > > > > I'm testing right now.
> > > > > 
> > > > > Where is the xfs patchset? I am wondering if it is due to slub code. 
> > > 
> > > I begin to wonder if this might be the result of a compiler bug. 
> > > The kernel in question was compiled with gcc version 4.7.0 20111117. And
> > > there was commit to the gcc repository today that looks suspicious:
> > > http://gcc.gnu.org/viewcvs?view=revision&revision=181466
> > > 
> > 
> > Tell us if it is still there and you can reproduce it.
> 
> Hm, just noticed the "3.2.0-rc1 panic on PowerPC" thread:
> http://thread.gmane.org/gmane.linux.kernel/1215584
> 
> The backtraces look suspiciously similar to mine.

So everything points to commit 87fb4b7b533:
"net: more accurate skb truesize"

Can you take a look Eric?

-- 
Markus
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