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

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Message-ID: <Pine.LNX.4.64.0707101510410.5490@schroedinger.engr.sgi.com>
Date:	Tue, 10 Jul 2007 15:12:38 -0700 (PDT)
From:	Christoph Lameter <clameter@....com>
To:	Matt Mackall <mpm@...enic.com>
cc:	Pekka Enberg <penberg@...helsinki.fi>,
	Nick Piggin <nickpiggin@...oo.com.au>,
	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

On Tue, 10 Jul 2007, Matt Mackall wrote:

> following as the best MemFree numbers after several boots each:
> 
> SLAB: 54796
> SLOB: 55044
> SLUB: 53944
> SLUB: 54788 (debug turned off)

That was without "slub_debug" as a parameter or with !CONFIG_SLUB_DEBUG?

Data size and code size will decrease if you compile with 
!CONFIG_SLUB_DEBUG. slub_debug on the command line governs if debug 
information is used.

> These numbers bounce around a lot more from boot to boot than I
> remember, so take these numbers with a grain of salt.
> 
> Disabling the debug code in the build gives this, by the way:
> 
> mm/slub.c: In function ÿÿinit_kmem_cache_nodeÿÿ:
> mm/slub.c:1873: error: ÿÿstruct kmem_cache_nodeÿÿ has no member named
> ÿÿfullÿÿ

A fix for that is in Andrew's tree.