linux-kernel - Re: [PATCH] x86: default to reboot via ACPI

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Message-ID: <48B3F3A9.8030709@qumranet.com>
Date:	Tue, 26 Aug 2008 15:14:33 +0300
From:	Avi Kivity <avi@...ranet.com>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
CC:	Pavel Machek <pavel@...e.cz>, Ingo Molnar <mingo@...e.hu>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	linux-kernel@...r.kernel.org, kvm@...r.kernel.org
Subject: Re: [PATCH] x86: default to reboot via ACPI

Alan Cox wrote:
>> It seems excessive.  Most machines will hardly run without acpi.
>>     
>
> *Recent* machines.
>   

Most machines are recent machines.

If a machine doesn't have acpi, this change is safe.

If a machine has acpi, but doesn't have the reset register set in the 
FADT, this change is safe.

If a machine has acpi, and the reset register is set incorrectly, this 
change is safe.

If a machine has acpi, and the reset register is wired to the launch 
controller, then perhaps this change is unsafe.  Don't issue sysrq-b on 
such machines.

-- 
error compiling committee.c: too many arguments to function

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