From: Daniel Jacobowitz <dan@debian.org>
To: "Albert D. Cahalan" <acahalan@cs.uml.edu>,
Andrew Morton <akpm@zip.com.au>,
lkml <linux-kernel@vger.kernel.org>
Subject: Re: [rfc] "laptop mode"
Date: Wed, 5 Jun 2002 14:14:39 -0400 [thread overview]
Message-ID: <20020605181439.GA5316@nevyn.them.org> (raw)
In-Reply-To: <3CFD453A.B6A43522@zip.com.au> <200206050341.g553fvi09850@saturn.cs.uml.edu> <20020605170735.GA18036@pimlott.net>
On Wed, Jun 05, 2002 at 01:07:35PM -0400, Andrew Pimlott wrote:
> On Tue, Jun 04, 2002 at 11:41:57PM -0400, Albert D. Cahalan wrote:
> > Also write out everything just before stopping the disk.
> > Don't let the disk stop if there is any dirty data.
>
> The kernel doesn't currently do spin-down at all, does it? Andrew,
> are you planning to change this? I'm not a kernel programmer, but
> it seems like a good idea to me: The kernel could flush writes as
> usual while the disk is spun up, but still spin down after a bit if
> the rate is low enough. The disk would never spin itself down in
> that case. Maybe there are also cases where the kernel would delay
> spin-down, if it hasn't started writing but thinks it might soon.
>
> I'm excited to try this. Thanks for writing it against 2.4!
At that point, you might as well be in userspace - particularly, you
might as well be running/enhancing noflushd.
--
Daniel Jacobowitz Carnegie Mellon University
MontaVista Software Debian GNU/Linux Developer
next prev parent reply other threads:[~2002-06-05 18:18 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-06-04 22:54 [rfc] "laptop mode" Andrew Morton
2002-06-02 5:46 ` Pavel Machek
2002-06-04 23:13 ` Andrew Morton
2002-06-02 5:47 ` Pavel Machek
2002-06-04 23:31 ` Andreas Dilger
2002-06-04 23:43 ` Andrew Morton
2002-06-02 5:52 ` Pavel Machek
2002-06-05 10:26 ` Xavier Bestel
2002-06-05 10:33 ` Jens Axboe
2002-06-05 10:55 ` Andrew Morton
2002-06-05 10:53 ` Jens Axboe
2002-06-02 6:43 ` Pavel Machek
2002-06-05 19:28 ` Andrew Morton
2002-06-02 6:41 ` Pavel Machek
2002-06-06 18:40 ` Oliver Xymoron
2002-06-05 10:39 ` Andrew Morton
2002-06-02 5:55 ` Pavel Machek
2002-06-05 10:47 ` Xavier Bestel
2002-06-05 18:37 ` Jeff Garzik
2002-06-05 22:32 ` Padraig Brady
2002-06-05 22:39 ` Cort Dougan
2002-06-05 11:41 ` Hans-Christian Armingeon
2002-06-05 10:02 ` Thomas 'Dent' Mirlacher
2002-06-05 11:05 ` Matti Aarnio
2002-06-05 11:10 ` Ingo Oeser
2002-06-05 3:41 ` Albert D. Cahalan
2002-06-05 17:07 ` Andrew Pimlott
2002-06-05 18:04 ` Frank v Waveren
2002-06-05 18:06 ` Frank v Waveren
2002-06-05 18:14 ` Daniel Jacobowitz [this message]
2002-06-05 9:44 ` Martin Dalecki
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