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

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Date:	Wed, 23 Nov 2011 11:18:21 +1100
From:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:	Christian Kujau <lists@...dbynature.de>
Cc:	Eric Dumazet <eric.dumazet@...il.com>,
	Christoph Lameter <cl@...ux.com>,
	Markus Trippelsdorf <markus@...ppelsdorf.de>,
	"Alex,Shi" <alex.shi@...el.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	Pekka Enberg <penberg@...nel.org>,
	Matt Mackall <mpm@...enic.com>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	Tejun Heo <tj@...nel.org>
Subject: Re: WARNING: at mm/slub.c:3357, kernel BUG at mm/slub.c:3413

On Tue, 2011-11-22 at 15:12 -0800, Christian Kujau wrote:
> On Wed, 23 Nov 2011 at 08:58, Benjamin Herrenschmidt wrote:
> > > > --- linux-2.6.orig/mm/slub.c	2011-11-21 21:15:41.575673204 -0600
> > > > +++ linux-2.6/mm/slub.c	2011-11-21 21:16:33.442336849 -0600
> [...]
> > > > -	} while (this_cpu_cmpxchg(s->cpu_slab->partial, oldpage, page) != oldpage);
> > > > +	} while (irqsafe_cpu_cmpxchg(s->cpu_slab->partial, oldpage, page) != oldpage);
> > 
> > Christian, can you try it see if that helps in your case ?
> 
> Only this one-liner from Christoph or any of the other patches that were 
> proposed in this thread?
> 
> Will test...but this might take a while...

I'd say only this one liner for now, just don't do slabinfo :-) I just
want to see whether your network + heavy IO load problem goes away with
that one patch.

Thanks !

Cheers,
Ben.

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