linux-kernel - Re: [PATCH] slub: prefetch next freelist pointer in slab

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CAMuHMdW-RbD-uxpOGmhv0LCsHLG-2Q0LvSRrB0cdM2efGRAYnw@mail.gmail.com>
Date:	Mon, 30 Jan 2012 22:32:53 +0100
From:	Geert Uytterhoeven <geert@...ux-m68k.org>
To:	Pekka Enberg <penberg@...nel.org>
Cc:	Christoph Lameter <cl@...ux.com>,
	Eric Dumazet <eric.dumazet@...il.com>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	David Rientjes <rientjes@...gle.com>,
	"Alex,Shi" <alex.shi@...el.com>, Shaohua Li <shaohua.li@...el.com>,
	Matt Mackall <mpm@...enic.com>,
	Linux-Next <linux-next@...r.kernel.org>
Subject: Re: [PATCH] slub: prefetch next freelist pointer in slab_alloc()

On Tue, Jan 24, 2012 at 20:54, Pekka Enberg <penberg@...nel.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@...ux.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@...ux-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
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/