From: Ingo Oeser <ingo.oeser@informatik.tu-chemnitz.de>
To: Hans-Christian Armingeon <linux.johnny@gmx.net>
Cc: Andreas Dilger <adilger@clusterfs.com>,
Andrew Morton <akpm@zip.com.au>,
lkml <linux-kernel@vger.kernel.org>
Subject: Re: [rfc] "laptop mode"
Date: Wed, 5 Jun 2002 13:10:46 +0200 [thread overview]
Message-ID: <20020605131046.S681@nightmaster.csn.tu-chemnitz.de> (raw)
In-Reply-To: <3CFD453A.B6A43522@zip.com.au> <20020604233124.GA18668@turbolinux.com> <200206051340.47261.root@johnny>
On Wed, Jun 05, 2002 at 01:41:28PM +0200, Hans-Christian Armingeon wrote:
> What parts of the filesystem needs to be accessed very often? I
> think, that placing var on a ramdisk, that is mirrored on the
> hd and is synced every 30 minutes, would be a good solution.
> I think, that we should add a sysrq key to save the ramdisk to
> the disk. Is there a similar project, that loads an image into
> a ramdisk at mount, and writes it back at unmount?
It's all there already. Just killall -STOP kupdated, use
sys_readahead() to read your often needed files into pagecache
and SysRq+S to sync, if needed.
Your solution involves copying things twice and using memory
twice, so it is not the right approach.
Andrews point was to control flushing by the power state of the
ide device.
Regards
Ingo Oeser
--
Science is what we can tell a computer. Art is everything else. --- D.E.Knuth
next prev parent reply other threads:[~2002-06-05 12:35 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-06-04 22:54 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 [this message]
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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