Re: [Xen-devel] [patch]Add a new reboot method

To:	Jan Beulich <jbeulich@xxxxxxxxxx>, Alan Cox <alan@xxxxxxxxxxxxxxxxxxx>
Subject:	Re: [Xen-devel] [patch]Add a new reboot method
From:	Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
Date:	Thu, 29 May 2008 14:30:04 +0100
Cc:	Huacai Chen <huacai.chen@xxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxx
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On 29/5/08 14:09, "Jan Beulich" <jbeulich@xxxxxxxxxx> wrote:

>> You might want to boot a 32bit kernel and try acpi=off, if that does the
>> trick then its (another) ACPI bug and the cf9 is red herring ?
> 
> As Keir also pointed out, there's no ACPI involved in rebooting. I also
> did verify (in a 32-bit kernel) that it's the keyboard boot sequence that
> causes the machine to hang.

ACPI *can* be involved in rebooting though, via FADT's RESET_REGISTER.
Question is: why does Linux ignore this reboot method? I expect there is a
reason. :-)

 -- Keir

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