linux-kernel - Re: [PATCH] Improve heuristic detecting sequential reads

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Message-ID: <20070411035448.GA4724@mail.ustc.edu.cn>
Date:	Wed, 11 Apr 2007 11:54:48 +0800
From:	WU Fengguang <wfg@...l.ustc.edu.cn>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Andi Kleen <andi@...stfloor.org>, Jan Kara <jack@...e.cz>,
	linux-kernel@...r.kernel.org, npiggin@...e.de
Subject: Re: [PATCH] Improve heuristic detecting sequential reads

On Tue, Apr 10, 2007 at 04:45:40PM -0700, Andrew Morton wrote:
> On 11 Apr 2007 00:56:51 +0200
> Andi Kleen <andi@...stfloor.org> wrote:
> 
> > There's a much more complete patchkit for this that gets reposted
> > regularly on l-k. Perhaps it would make sense to test that first?
> 
> adaptive readahead?  Has been in -mm for a year.  Problem is, it is
> _so_ complete that I just don't know how to merge it.  It's huge, and
> only Wu understands it. So it's really rather stuck.

Yeah, it is.

I'll come up with a minimal patch to first simplify the current
readahead algorithm. The code is ready, if ignoring the document ;-)

Wu
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