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Date: Mon, 27 Dec 2010 21:41:42 +0100
From: Heinz Diehl <htd@fancy-poultry.org>
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Subject: Re: [dm-crypt] ext3 + dm_crypt performance impact (CentOS 5.4 AMD64)
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To: dm-crypt@saout.de

On 27.12.2010, Robert.Heinzmann@deutschepost.de wrote: 

> I'm currently testig some dm_crypt performance on CentOS 5.4 (AMD64, Kernel 2.6.21.7)
[....]

I know that CentOS is focused on stability, but 2.6.21.7 is abysmally old.
Just for what it is, did you ever try to do the same with the latest
mainline kernel?