Message-ID: <4154A655.9040302@austin.ibm.com>
Date: Fri, 24 Sep 2004 17:57:25 -0500
From: Steven Pratt <slpratt@austin.ibm.com>
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To: Peter Chubb <peterc@gelato.unsw.edu.au>
CC: Andrew Morton <akpm@osdl.org>, linux-kernel@vger.kernel.org
Subject: Re: [PATCH/RFC] Simplified Readahead
References: <16723.43493.796084.90914@wombat.chubb.wattle.id.au>
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Peter Chubb wrote:

>>>>>>"Andrew" == Andrew Morton <akpm@osdl.org> writes:
>>>>>>            
>>>>>>
>
>Andrew> Steven Pratt <slpratt@austin.ibm.com> wrote:
>  
>
>>> The readahead code has undergone many changes in the 2.6 kernel
>>>and the current implementation is in my opinion obtuse and hard to
>>>maintain.
>>>      
>>>
>
>Andrew> It did get a bit ugly - it was intially designed to handle
>Andrew> pagefault readaround and perhaps could be further simplified
>Andrew> as we're now doing that independently.
>
>If you're coding up new readahead schemes, it may be worth taking into
>account Papathanasiou and Scott, `Energy Efficient Prefetching and
>Caching'
>( http://www.usenix.org/events/usenix04/tech/general/papathanasiou/papathanasiou_html/index.html
>)
>  
>
Have not had time to look into this yet, but I will.  

Thanks, Steve


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