From: Martin Waitz <tali@admingilde.org>
To: Jens Axboe <axboe@suse.de>
Cc: Linux Kernel <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] 2.4 laptop mode
Date: Thu, 15 May 2003 10:59:12 +0200 [thread overview]
Message-ID: <20030515085912.GV1253@admingilde.org> (raw)
In-Reply-To: <20030514093504.GE17033@suse.de>
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hi :)
On Wed, May 14, 2003 at 11:35:04AM +0200, Jens Axboe wrote:
> Now, this isn't the prettiest patch in the world. But it does allow me
> to get good spin down times on my laptop hard drive. It was somewhat
> inspired by the 2.5.early version akpm did. Basically, it adds:
if you are interested in spinning down hard drives, you might want to read
http://www4.informatik.uni-erlangen.de/Publications/pdf/Weissel-Beutel-Bellosa-OSDI-CoopIO.pdf
they describe strategies to get maximum sleep times for drives by
bundling accesses to hard discs.
they even go a little bit faster and allow user space to give hints
about when they need data.
i only had a brief look at the sources but i guess this could be folded
into the aio interface.
(CoopIO as described above adds its own system calls)
it would be great if somethink like that could be ported to 2.5...
--
CU, / Friedrich-Alexander University Erlangen, Germany
Martin Waitz // Department of Computer Science 3 _________
______________/// - - - - - - - - - - - - - - - - - - - - ///
dies ist eine manuell generierte mail, sie beinhaltet //
tippfehler und ist auch ohne grossbuchstaben gueltig. /
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next prev parent reply other threads:[~2003-05-15 8:46 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-05-14 9:35 [PATCH] 2.4 laptop mode Jens Axboe
2003-05-15 8:59 ` Martin Waitz [this message]
2003-05-15 10:06 ` Jens Axboe
2003-05-15 12:54 ` Martin Waitz
2003-05-15 15:14 ` Jens Axboe
[not found] <20030514094011$5169@gated-at.bofh.it>
2003-06-09 7:44 ` Tim Connors
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