From: Jeff Garzik <jgarzik@pobox.com>
To: Matt Domsch <Matt_Domsch@dell.com>
Cc: David Balazic <david.balazic@hermes.si>,
Dave Jones <davej@redhat.com>, Andries Brouwer <aebr@win.tue.nl>,
Pavel Machek <pavel@suse.cz>,
Linux Kernel <linux-kernel@vger.kernel.org>,
Andi Kleen <ak@suse.de>, Andrew Morton <akpm@osdl.org>
Subject: Re: Weird: 30 sec delay during early boot
Date: Tue, 13 Jul 2004 18:35:28 -0400 [thread overview]
Message-ID: <40F463B0.1010706@pobox.com> (raw)
In-Reply-To: <20040713221623.GA10480@lists.us.dell.com>
Matt Domsch wrote:
> David, Jeff, would you mind trying the patch below on your systems
> which exhibit the long delays in the EDD real-mode code?
>
> This does a few things:
> 1) it uses an int13 fn15 "Get Disk Type" command prior to doing the
> fn02 "Read Sectors" command, to try to determine if there is a disk
> present or not before reading its signature.
>
> 2) A few registers are more fully zeroed out, in case the BIOS cared
> about things it shouldn't have.
>
> Crossing my fingers that the delays are gone...
Can you attach the patch, or switch mailers?
The patch is word-wrapped and otherwise munged :(
Example:
> +# Do int13 fn15 first, as BIOS should know if a disk is present or not.
> +# This avoids long (>30s) delays waiting for the READ_SECTORS to a non-pre=
> sent disk.
> + xor %eax, %eax
next prev parent reply other threads:[~2004-07-13 22:36 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-07-05 11:30 Weird: 30 sec delay during early boot David Balazic
2004-07-13 22:16 ` Matt Domsch
2004-07-13 22:35 ` Jeff Garzik [this message]
2004-07-14 2:32 ` Matt Domsch
2004-07-14 3:03 ` Matt Domsch
2004-07-14 3:18 ` Jeff Garzik
-- strict thread matches above, loose matches on Subject: below --
2004-07-30 12:52 David Balazic
2004-07-29 13:05 David Balazic
2004-07-29 16:02 ` Matt Domsch
2004-07-28 12:16 David Balazic
2004-07-28 12:40 ` Matt Domsch
2004-07-05 7:21 David Balazic
2004-07-05 11:25 ` Dave Jones
[not found] <2e55c-392-7@gated-at.bofh.it>
2004-07-04 2:47 ` Andi Kleen
2004-07-04 2:52 ` Jeff Garzik
2004-07-04 3:23 ` Andi Kleen
2004-07-04 2:34 Jeff Garzik
2004-07-04 6:33 ` Pavel Machek
2004-07-04 17:33 ` Jeff Garzik
2004-07-04 20:52 ` Matt Domsch
2004-07-04 23:27 ` Andries Brouwer
2004-07-05 13:31 ` Matt Domsch
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