linux-kernel - Re: [bug, netconsole, SLUB] BUG skbuff_head

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Message-ID: <20080721125747.GA3056@2ka.mipt.ru>
Date:	Mon, 21 Jul 2008 16:57:47 +0400
From:	Evgeniy Polyakov <johnpol@....mipt.ru>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Pekka Enberg <penberg@...helsinki.fi>,
	linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
	Vegard Nossum <vegard.nossum@...il.com>,
	"Rafael J. Wysocki" <rjw@...k.pl>, cl@...ux-foundation.org,
	davem@...emloft.net
Subject: Re: [bug, netconsole, SLUB] BUG skbuff_head_cache: Poison overwritten

On Mon, Jul 21, 2008 at 01:55:55PM +0200, Ingo Molnar (mingo@...e.hu) wrote:
> > > I could try run tests with netconsole deactivated, if you think 
> > > that's a worthwile line of probing this problem. (although that 
> > > would make me do blind tests in essence - having kernel log output 
> > > is really essential.)
> > 
> > Let's try this way first. If system will continue to crash, we will 
> > add some debug options in various pathes. Existing reports do not 
> > contain enough information unfortunately, so we will not lose too 
> > much.
> 
> ok. I've turned off netconsole - 8 successful bootups in a row so far. 
> The box is a slow booter/builder with an 8 kernels/hour test throughput, 
> so if everything goes fine we should have meaningful results in about 10 
> hours.
> 
> ( there are other, faster testboxes in -tip testing with 33 kernels/hour 
>   build+boot throughput where we'd have to wait only 2 hours - but as 
>   per Murphy's law they dont trigger this bug ;-)

Since 2.6.25 there was only single change in netpoll.c:
f5184d267c1aedb9b7a8cc44e08ff6b8d382c3b5
Which looks innocent.

Is your driver e1000 or e1000e? Can you check different one?

-- 
	Evgeniy Polyakov
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