linux-kernel - Re: [patch 09/10] Remove the SLOB allocator for 2.6.23

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Message-ID: <Pine.LNX.4.64.0707101544150.27425@sbz-30.cs.Helsinki.FI>
Date:	Tue, 10 Jul 2007 15:57:26 +0300 (EEST)
From:	Pekka J Enberg <penberg@...helsinki.fi>
To:	Matt Mackall <mpm@...enic.com>
cc:	Nick Piggin <nickpiggin@...oo.com.au>,
	Christoph Lameter <clameter@....com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org, suresh.b.siddha@...el.com,
	corey.d.gough@...el.com, Denis Vlasenko <vda.linux@...glemail.com>,
	Erik Andersen <andersen@...epoet.org>
Subject: Re: [patch 09/10] Remove the SLOB allocator for 2.6.23

Hi Matt,

On Tue, 10 Jul 2007, Matt Mackall wrote:
> Using 2.6.22-rc6-mm1 with a 64MB lguest and busybox, I'm seeing the
> following as the best MemFree numbers after several boots each:
> 
> SLAB: 54796
> SLOB: 55044
> SLUB: 53944
> SLUB: 54788 (debug turned off)
> 
> These numbers bounce around a lot more from boot to boot than I
> remember, so take these numbers with a grain of salt.

To rule out userland, 2.6.22 with 32 MB defconfig UML and busybox [1] on 
i386:

SLOB: 26708
SLUB: 27212 (no debug)

Unfortunately UML is broken in 2.6.22-rc6-mm1, so I don't know if SLOB 
patches help there.

  1. http://uml.nagafix.co.uk/BusyBox-1.5.0/BusyBox-1.5.0-x86-root_fs.bz2

			Pekka
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