From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: fletch@aracnet.com (Martin J. Bligh)
Cc: linux-kernel@vger.kernel.org
Subject: Re: Faster reboots (and a better way of taking crashdumps?)
Date: Sat, 6 Apr 2002 18:56:35 +0100 (BST) [thread overview]
Message-ID: <E16tuQV-0002Lt-00@the-village.bc.nu> (raw)
In-Reply-To: <1650399759.1018005181@[10.10.2.3]> from "Martin J. Bligh" at Apr 05, 2002 11:13:01 AM
> What's to stop me rebooting by having machine_restart load
> the first sector of the first disk (as the BIOS does), where
> the LILO code should be, and just jumping to it?
In theory nothing
> 1. Are there tables that are created by the BIOS that we
> destroy during Linux runtime? mps tables spring to mind -
> I can't see where we preserve them ...
They should be in E820 reserved pages anyway and we do keep them and the
EBDA safe. You will however have blown away ACPI pages marked as disposable
> 2. Things that are reset by reboot that we don't reset during
> normal kernel boot?
Possibly. I wouldnt like to hand control back to the BIOS but the kernel
ought to be ok with itself.
Alan
next prev parent reply other threads:[~2002-04-06 17:39 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-04-05 19:13 Martin J. Bligh
2002-04-05 20:47 ` Jeremy Jackson
2002-04-06 1:48 ` Martin J. Bligh
2002-04-06 2:55 ` Jeremy Jackson
2002-04-06 17:04 ` Faster reboots - calling _start? Byron Stanoszek
2002-04-06 20:00 ` Eric W. Biederman
2002-04-06 21:37 ` Martin J. Bligh
2002-04-06 21:57 ` Eric W. Biederman
2002-04-08 7:20 ` Faster reboots (and a better way of taking crashdumps?) Suparna Bhattacharya
2002-04-11 3:47 ` Jeremy Jackson
2002-04-11 14:28 ` Suparna Bhattacharya
2002-04-06 17:56 ` Alan Cox [this message]
2002-04-07 1:35 ` Martin J. Bligh
2002-04-06 23:27 ` Eric W. Biederman
2002-04-07 1:32 Martin J. Bligh
2002-04-07 2:50 ` Eric W. Biederman
2002-04-07 4:00 ` Martin J. Bligh
2002-04-07 4:12 ` Eric W. Biederman
2002-04-08 14:31 ` Suparna Bhattacharya
2002-04-08 17:09 ` Eric W. Biederman
2002-04-09 15:26 ` Suparna Bhattacharya
2002-04-10 15:40 ` Eric W. Biederman
2002-04-10 17:58 ` Andy Pfiffer
2002-04-11 14:15 ` Suparna Bhattacharya
2002-04-11 15:08 ` Eric W. Biederman
2002-04-16 10:02 ` Pavel Machek
2002-04-16 22:59 ` Alan Cox
2002-04-11 13:56 ` Suparna Bhattacharya
2002-04-11 15:35 ` Eric W. Biederman
2002-04-12 14:49 ` Suparna Bhattacharya
2002-04-12 17:59 ` Eric W. Biederman
2002-04-15 10:07 ` Suparna Bhattacharya
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