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Date: Mon, 30 Jan 2012 22:32:53 +0100
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Subject: Re: [PATCH] slub: prefetch next freelist pointer in slab_alloc()
From: Geert Uytterhoeven <geert@linux-m68k.org>
To: Pekka Enberg <penberg@kernel.org>
Cc: Christoph Lameter <cl@linux.com>, Eric Dumazet <eric.dumazet@gmail.com>,
        linux-kernel <linux-kernel@vger.kernel.org>,
        David Rientjes <rientjes@google.com>, "Alex,Shi" <alex.shi@intel.com>,
        Shaohua Li <shaohua.li@intel.com>, Matt Mackall <mpm@selenic.com>,
        Linux-Next <linux-next@vger.kernel.org>
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On Tue, Jan 24, 2012 at 20:54, Pekka Enberg <penberg@kernel.org> wrote:
> On Fri, 16 Dec 2011, Eric Dumazet wrote:
>>> Recycling a page is a problem, since freelist link chain is hot on
>>> cpu(s) which freed objects, and possibly very cold on cpu currently
>>> owning slab.
>
> On Fri, 16 Dec 2011, Christoph Lameter wrote:
>> Good idea. How do the tcp benchmarks look after this?
>>
>> Looks sane.
>>
>> Acked-by: Christoph Lameter <cl@linux.com>
>
> Applied, thanks!

m68k/allmodconfig at http://kisskb.ellerman.id.au/kisskb/buildresult/5527349/

mm/slub.c:274: error: implicit declaration of function 'prefetch'

Sorry, didn't notice it earlier due to other build breakage in -next.

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds