linux-kernel - Re: SLUB: Increasing partial pages

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Date:	Mon, 5 May 2008 21:04:42 +0300
From:	"Pekka Enberg" <penberg@...helsinki.fi>
To:	"Christoph Lameter" <clameter@....com>
Cc:	"Matthew Wilcox" <matthew@....cx>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: Re: SLUB: Increasing partial pages

On Tue, Jan 22, 2008 at 12:00:00PM -0800, Christoph Lameter wrote:
> > > Patches that I would recommend to test individually if you could do it
> > > (get the series via git pull
> > > git://git.kernel.org/pub/scm/linux/kernel/git/christoph/vm.git performance):

On Sat, 16 Feb 2008, Matthew Wilcox wrote:
>  > With these patches applied to 2.6.24-rc8, the perf team are seeing
>  > oopses while running the benchmark.  They're currently trying to narrow
>  > down which of the patches it is.  I'll get an oops for you to study when
>  > they've figured that out.

On Sat, Feb 16, 2008 at 10:34 PM, Christoph Lameter <clameter@....com> wrote:
>  There is also new code upstream now with significant changes that
>  affect performance. It may not be worthwhile to continue with 2.6.24-rc8
>  + patches.

Matthew, there are changes in 2.6.26-rc1 that might affect your
workload with SLUB:

http://git.kernel.org/?p=linux/kernel/git/penberg/slab-2.6.git;a=commitdiff;h=c124f5b54f879e5870befcc076addbd5d614663f

http://git.kernel.org/?p=linux/kernel/git/penberg/slab-2.6.git;a=commitdiff;h=9b2cd506e5f2117f94c28a0040bf5da058105316

I would appreciate any updates where we currently stand with the
SLAB/SLUB performance regression on your TPC test. Thanks.

                Pekka
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