linux-kernel - Re: [PATCH 2/3]: xvmalloc memory allocator

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Date:	Tue, 17 Mar 2009 12:41:09 -0400 (EDT)
From:	Christoph Lameter <cl@...ux-foundation.org>
To:	Nitin Gupta <ngupta@...are.org>
cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/3]: xvmalloc memory allocator

On Tue, 17 Mar 2009, Nitin Gupta wrote:

> Slub allocator could not be used due to fragmentation issues:
> http://code.google.com/p/compcache/wiki/AllocatorsComparison
> Data here shows kmalloc using ~43% more memory than TLSF and xvMalloc
> is showed ~2% more space efficiency than TLSF (due to smaller metadata).

Well this looks like the use of 2^n sizes of the kmalloc arrayse cause a
lot of wastage here. Creating slab caches that fit your needs may help?
Have you had a look at the SLOB approach?
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