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From: Steven Pratt <slpratt@austin.ibm.com>
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
Date: Fri, 24 Sep 2004 17:57:25 -0500	[thread overview]
Message-ID: <4154A655.9040302@austin.ibm.com> (raw)
In-Reply-To: <16723.43493.796084.90914@wombat.chubb.wattle.id.au>

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



  reply	other threads:[~2004-09-24 22:55 UTC|newest]

Thread overview: 33+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <372479081@toto.iv>
2004-09-24  5:00 ` [PATCH/RFC] Simplified Readahead Peter Chubb
2004-09-24 22:57   ` Steven Pratt [this message]
2004-09-23 16:06 Steven Pratt
2004-09-23 22:14 ` Joel Schopp
2004-09-24  0:21 ` Nick Piggin
2004-09-24  2:42 ` Andrew Morton
2004-09-24 15:40   ` Steven Pratt
2004-09-24 16:16     ` Nick Piggin
2004-09-24 16:48       ` Steven Pratt
2004-09-24 22:05     ` Andrew Morton
2004-09-24 22:43       ` Steven Pratt
2004-09-24 23:01         ` Andrew Morton
2004-09-27 15:39           ` Steven Pratt
2004-09-27 19:26             ` Andrew Morton
2004-09-28 10:13               ` Jens Axboe
2004-09-24 22:55       ` Steven Pratt
2004-09-27 20:29         ` Ray Bryant
2004-09-27 21:04           ` Steven Pratt
2004-09-25  0:45       ` Nick Piggin
2004-09-25  1:01 ` Ram Pai
2004-09-25  6:07   ` Ram Pai
2004-09-27 15:30     ` Steven Pratt
2004-09-27 18:42       ` Ram Pai
2004-09-27 20:07         ` Steven Pratt
2004-09-29 18:46           ` Ram Pai
2004-09-29 22:33             ` Steven Pratt
2004-09-29 23:13               ` Andreas Dilger
2004-09-30  2:26                 ` Ram Pai
2004-09-30  5:29                   ` Andrew Morton
2004-09-30 20:20                 ` Stephen C. Tweedie
2004-09-30  1:12               ` Ram Pai
2004-10-01 21:02             ` Steven Pratt
2004-10-05 17:52               ` Ram Pai

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