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

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Message-ID: <Pine.LNX.4.64.0707090859100.13970@schroedinger.engr.sgi.com>
Date:	Mon, 9 Jul 2007 09:00:30 -0700 (PDT)
From:	Christoph Lameter <clameter@....com>
To:	Ingo Molnar <mingo@...e.hu>
cc:	linux-kernel@...r.kernel.org, linux-mm@...r.kernel.org,
	suresh.b.siddha@...el.com, corey.d.gough@...el.com,
	Pekka Enberg <penberg@...helsinki.fi>,
	akpm@...ux-foundation.org, Matt Mackall <mpm@...enic.com>
Subject: Re: [patch 09/10] Remove the SLOB allocator for 2.6.23

On Sun, 8 Jul 2007, Ingo Molnar wrote:

> actually, one real advantage of the SLOB is that it is a minimal, really 
> simple allocator. Its text and data size is so small as well.
> 
> here's the size comparison:
> 
>    text    data     bss     dec     hex filename
>   10788     837      16   11641    2d79 mm/slab.o
>    6205    4207     124   10536    2928 mm/slub.o
>    1640      44       4    1688     698 mm/slob.o
> 
> slab/slub have roughly the same footprint, but slob is 10% of that size. 
> Would be a waste to throw this away.

The last of my tests showed that SLOB is at about 50% of the size of 
SLUB. You need to compile SLUB in embedded mode with !CONFIG_SLUB_DEBUG to 
get a reduce code size.
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