From: ebiederm@xmission.com (Eric W. Biederman)
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: bcrl@redhat.com (Benjamin LaHaise),
akpm@zip.com.au (Andrew Morton),
rgooch@ras.ucalgary.ca (Richard Gooch),
joeja@mindspring.com, linux-kernel@vger.kernel.org
Subject: Re: faster boots?
Date: 04 Apr 2002 23:14:12 -0700 [thread overview]
Message-ID: <m1sn6apt8r.fsf@frodo.biederman.org> (raw)
In-Reply-To: <E16tKI6-0007TJ-00@the-village.bc.nu>
Alan Cox <alan@lxorguk.ukuu.org.uk> writes:
> > I find that on heavily scsi systems: one machine spins each of 13 disks
> > up sequentially. This makes the initial boot take 3-5 minutes before
> > init even gets its foot in the door. If someone made a patch to spin
> > up scsi disks on the first access, I'd gladly give it a test. ;-)
>
> Ditto. Especially if it spun them down again when idle for a while.
>
> The scsi layer does several things serially it could parallelise. It isnt
> just disk spin up its also things like initialising all scsi controllers
> in parallel.
I'm interested in this kind of thing too. Though I am wondering if the IDE
layer has the same kind of issues. I notice because the kernel initialization
time is 50% of my boot time. I have the kernel loaded 3 seconds from
power on...
My impression is that the time during kernel initialization is either
spent spinning up disks or in a million device probes and things going
on behind the scenes. I haven't had a chance to look farther though.
Eric
next prev parent reply other threads:[~2002-04-05 6:21 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
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 [this message]
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
-- strict thread matches above, loose matches on Subject: below --
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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