netdev - Re: [bug, netconsole, SLUB] BUG skbuff_head

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Message-ID: <20080721192138.GA27672@elte.hu>
Date:	Mon, 21 Jul 2008 21:21:38 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Evgeniy Polyakov <johnpol@....mipt.ru>
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, Auke Kok <auke-jan.h.kok@...el.com>
Subject: Re: [bug, netconsole, SLUB] BUG skbuff_head_cache: Poison
	overwritten


* Ingo Molnar <mingo@...e.hu> wrote:

> * Evgeniy Polyakov <johnpol@....mipt.ru> 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 ;-)

70 bootups with netconsole turned off, and not a single crash so far.

So it's now a strong likelyhood that this crash is a combination of 
e1000e+netconsole.

	Ingo
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