From: Andreas Dilger <adilger@clusterfs.com>
To: Andrew Morton <akpm@zip.com.au>
Cc: lkml <linux-kernel@vger.kernel.org>
Subject: Re: [rfc] "laptop mode"
Date: Tue, 4 Jun 2002 17:31:24 -0600 [thread overview]
Message-ID: <20020604233124.GA18668@turbolinux.com> (raw)
In-Reply-To: <3CFD453A.B6A43522@zip.com.au>
On Jun 04, 2002 15:54 -0700, Andrew Morton wrote:
> laptop_writeback_centisecs
> --------------------------
>
> This tunable determines the maximum age of dirty data when the machine
> is operating in Laptop mode. The default value is 30000 - five
> minutes. This means that if applications are generating a small amount
> of write traffic, the disk will spin up once per five minutes.
Just FYI, this is probably an optimally bad choice for the default disk
spinup interval, as many laptops spindown timers in the same ballpark.
I would say 15-20 minutes or more, unless there is a huge amount of
VM pressure or something. Otherwise, you will quickly have a dead
laptop harddrive from the overly-frequent spinup/down cycles.
Yes, minutae, I know. Otherwise a nice idea.
Cheers, Andreas
--
Andreas Dilger
http://www-mddsp.enel.ucalgary.ca/People/adilger/
http://sourceforge.net/projects/ext2resize/
next prev parent reply other threads:[~2002-06-04 23:33 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 [this message]
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
2002-06-05 9:44 ` Martin Dalecki
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