linux-kernel - Re: [PATCH -v2] mm: SLAB Out-of-memory diagnostics

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Message-ID: <alpine.DEB.2.00.1203062142290.6424@chino.kir.corp.google.com>
Date:	Tue, 6 Mar 2012 21:42:57 -0800 (PST)
From:	David Rientjes <rientjes@...gle.com>
To:	Cong Wang <xiyou.wangcong@...il.com>
cc:	Rafael Aquini <aquini@...hat.com>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, Randy Dunlap <rdunlap@...otime.net>,
	Christoph Lameter <cl@...ux-foundation.org>,
	Pekka Enberg <penberg@...nel.org>,
	Matt Mackall <mpm@...enic.com>, Rik van Riel <riel@...hat.com>,
	Josef Bacik <josef@...hat.com>
Subject: Re: [PATCH -v2] mm: SLAB Out-of-memory diagnostics

On Wed, 7 Mar 2012, Cong Wang wrote:

> > Following the example at mm/slub.c, add out-of-memory diagnostics to the
> > SLAB allocator to help on debugging certain OOM conditions.
> > 
> > An example print out looks like this:
> > 
> >    <snip page allocator out-of-memory message>
> >    SLAB: Unable to allocate memory on node 0 (gfp=0x11200)
> >       cache: bio-0, object size: 192, order: 0
> >       node0: slabs: 3/3, objs: 60/60, free: 0
> > 
> 
> Nitpick:
> 
> What about "node: 0" instead of "node0: " ?
> 

Good catch, that format would match the output of the slub out-of-memory 
messages.
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