From: Richard Gooch <rgooch@ras.ucalgary.ca>
To: Oliver Neukum <oliver@neukum.org>
Cc: nahshon@actcom.co.il, Pavel Machek <pavel@suse.cz>,
Benjamin LaHaise <bcrl@redhat.com>,
Alan Cox <alan@lxorguk.ukuu.org.uk>,
Andrew Morton <akpm@zip.com.au>,
joeja@mindspring.com, linux-kernel@vger.kernel.org
Subject: Re: faster boots?
Date: Mon, 8 Apr 2002 11:06:02 -0600 [thread overview]
Message-ID: <200204081706.g38H62N14879@vindaloo.ras.ucalgary.ca> (raw)
In-Reply-To: <16uSEQ-1XziYCC@fmrl04.sul.t-online.com>
Oliver Neukum writes:
>
> > > and spin-up on any operation that writes to the disk (and block that
> > > operation).
> >
> > Absolutely not! I don't want my writes to spin up the drive.
>
> Even if you sync ?
I'm undecided. I think it's good to have a way to let the user force a
flush, but I don't like the same mechanism being used by applications
which think they know better. So flushing on sync(2) or f*sync(2) is
perhaps undesirable. Maybe the way to deal with this is to have:
- tunable flush time (i.e. how long to wait after a write(2) before
flushing, if the drive is currently unspun)
- tunable dirty pages limit (i.e. how many dirty pages allowed before
flushing)
- tunable "ignore *sync(2)" option. Default value is 0 (don't
ignore). When set to 1, ignore all calls to *sync(2).
So then on my 256 MiB laptop, I'd probably set the flush time to 3
hours, the dirty page limit to 64 MiB, and ignore *sync(2). I'd write
a suid-root programme which did:
enable_sync ();
sync ();
disable_sync ();
Regards,
Richard....
Permanent: rgooch@atnf.csiro.au
Current: rgooch@ras.ucalgary.ca
next prev parent reply other threads:[~2002-04-08 17:06 UTC|newest]
Thread overview: 77+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-04-04 23:54 faster boots? joeja
2002-04-05 0:21 ` Alan Cox
2002-04-05 1:00 ` Jeremy Jackson
2002-04-05 0:26 ` Andrew Morton
2002-04-05 2:18 ` Richard Gooch
2002-04-05 2:51 ` Andrew Morton
2002-04-05 3:00 ` Benjamin LaHaise
2002-04-05 3:21 ` Alan Cox
2002-04-05 5:38 ` Richard Gooch
2002-04-05 12:49 ` Alan Cox
2002-04-05 16:33 ` Richard Gooch
2002-04-05 23:02 ` Itai Nahshon
2002-04-05 23:07 ` Benjamin LaHaise
2002-04-06 0:07 ` Itai Nahshon
2002-04-06 0:29 ` Benjamin LaHaise
2002-04-07 14:42 ` Pavel Machek
2002-04-08 0:48 ` Itai Nahshon
2002-04-08 0:57 ` Richard Gooch
2002-04-08 1:14 ` Andrew Morton
2002-04-08 4:17 ` Andre Hedrick
2002-04-08 9:57 ` Pavel Machek
2002-04-08 16:43 ` Jamie Lokier
2002-04-08 16:48 ` Benjamin LaHaise
2002-04-08 21:09 ` Pavel Machek
2002-04-09 0:56 ` Jamie Lokier
2002-04-09 22:22 ` Pavel Machek
2002-04-12 10:44 ` Jamie Lokier
2002-04-12 11:42 ` Pavel Machek
2002-04-12 14:29 ` Jamie Lokier
2002-04-14 19:40 ` Pavel Machek
2002-04-15 13:34 ` Philipp Matthias Hahn
2002-04-08 17:08 ` Mark Mielke
2002-04-08 17:49 ` Rene Rebe
2002-04-08 18:02 ` G . Sumner Hayes
2002-04-08 6:02 ` Oliver Neukum
2002-04-08 17:06 ` Richard Gooch [this message]
2002-04-08 16:13 ` Martin Dalecki
2002-04-08 15:16 ` Bill Davidsen
2002-04-08 17:32 ` Richard Gooch
2002-04-08 18:31 ` Bill Davidsen
2002-04-08 18:40 ` David Lang
2002-04-08 18:56 ` Richard B. Johnson
2002-04-08 19:06 ` David Lang
2002-04-08 19:27 ` Richard B. Johnson
2002-04-08 8:03 ` Helge Hafting
2002-04-08 12:38 ` Rogier Wolff
2002-04-08 14:41 ` Bill Davidsen
2002-04-08 9:55 ` Pavel Machek
2002-04-08 12:15 ` Rogier Wolff
2002-04-08 12:09 ` Rogier Wolff
2002-04-05 6:14 ` Eric W. Biederman
2002-04-05 12:45 ` Alan Cox
2002-04-05 13:04 ` Bill Davidsen
2002-04-05 21:33 ` Benjamin LaHaise
2002-04-05 5:26 ` Richard Gooch
2002-04-05 7:45 ` dean gaudet
2002-04-05 18:43 ` Jeremy Jackson
2002-04-05 0:44 ` Piotr Esden-Tempski
2002-04-05 13:37 ` Mauricio Nuñez
2002-04-05 1:11 ` Ross Vandegrift
2002-04-05 1:55 ` Bernd Eckenfels
2002-04-05 12:56 ` Bill Davidsen
2002-04-10 1:20 ` Mike Touloumtzis
2002-04-05 19:08 ` Mark H. Wood
2002-04-05 2:10 joeja
2002-04-05 7:44 ` Helge Hafting
2002-04-05 12:13 ` Thomas 'Dent' Mirlacher
2002-04-05 15:14 ` Luigi Genoni
2002-04-05 8:00 willy tarreau
2002-04-05 13:06 ` Bill Davidsen
2002-04-05 13:21 ` willy tarreau
2002-04-05 15:29 ` Bill Davidsen
2002-04-05 16:20 ` willy tarreau
2002-04-05 23:10 ` Itai Nahshon
[not found] <3CACEF18.CE742314@zip.com.au.suse.lists.linux.kernel>
[not found] ` <Pine.LNX.4.33.0204042330270.10358-100000@twinlark.arctic.org.suse.lists.linux.kernel>
2002-04-05 8:41 ` Andi Kleen
2002-04-05 18:23 Torrey Hoffman
2002-04-06 17:53 Re: " Alan Cox
2002-04-06 19:01 ` Joe
[not found] <Pine.LNX.4.33.0204051403200.7124-100000@mhw.ULib.IUPUI.Edu >
2002-04-07 20:10 ` Stevie O
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