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Date: Tue, 17 May 2005 18:05:27 -0700
From: Andrew Morton <akpm@osdl.org>
To: Tejun Heo <htejun@gmail.com>
Cc: axboe@suse.de, linux-kernel@vger.kernel.org
Subject: Re: [PATCH linux-2.6.12-rc4] block: cfq request selection
 improvement
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Tejun Heo <htejun@gmail.com> wrote:
>
>   Previously, each cfqq used separate sliding window (find_best_crq ==
>  1) or selected the first request (find_best_crq == 0).  This patch
>  implements global sliding window (find_bset_crq == 2) for request
>  selection from cfqq.

There's a great big revamp of the CFQ scheduler in -mm.  Perhaps you should
be testing and patching that?