linux-kernel - Re: [PATCH] oom: add sysctl to enable slab memory dump

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Message-ID: <20120229033908.GA28416@t510.redhat.com>
Date:	Wed, 29 Feb 2012 00:39:09 -0300
From:	Rafael Aquini <aquini@...hat.com>
To:	Pekka Enberg <penberg@...nel.org>
Cc:	David Rientjes <rientjes@...gle.com>, linux-mm@...ck.org,
	Randy Dunlap <rdunlap@...otime.net>,
	Christoph Lameter <cl@...ux-foundation.org>,
	Matt Mackall <mpm@...enic.com>, Rik van Riel <riel@...hat.com>,
	Josef Bacik <josef@...hat.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] oom: add sysctl to enable slab memory dump

On Fri, Feb 24, 2012 at 12:05:27PM +0200, Pekka Enberg wrote:
> On Fri, Feb 24, 2012 at 12:03 PM, David Rientjes <rientjes@...gle.com> wrote:
> > I like how slub handles this when it can't allocate more slab with
> > slab_out_of_memory() and has the added benefit of still warning even with
> > __GFP_NORETRY that the oom killer is never called for.  If there's really
> > a slab leak happening, there's a good chance that this diagnostic
> > information is going to be emitted by the offending cache at some point in
> > time if you're using slub.  This could easily be extended to slab.c, so
> > it's even more reason not to include this type of information in the oom
> > killer.
> 
> Works for me. Rafael?

New patch, following the suggested approach, posted: 
https://lkml.org/lkml/2012/2/28/561

Thanks folks, for all your feedback here!
Rafael
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