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

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Message-ID: <20080826110715.GA26204@elte.hu>
Date:	Tue, 26 Aug 2008 13:07:15 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Frans Meulenbroeks <fransmeulenbroeks@...il.com>
Cc:	Avi Kivity <avi@...ranet.com>, Pavel Machek <pavel@...e.cz>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	linux-kernel@...r.kernel.org, kvm@...r.kernel.org
Subject: Re: [PATCH] x86: default to reboot via ACPI


* Frans Meulenbroeks <fransmeulenbroeks@...il.com> wrote:

> 2008/8/26 Avi Kivity <avi@...ranet.com>:
> 
> > It seems excessive.  Most machines will hardly run without acpi.
> 
> Well, I'm fairly sure that most of the systems running linux (or some 
> variant like uclinux), do not support acpi.
> 
> Linux is used a lot in embedded systems (like routers and NAS-es and 
> probably set-top boxes). I guess the # of embedded systems with some 
> linux flavour on it is substantially bigger than the desktop systems. 
> Most of these are ARM or MIPS based and do not support ACPI.

... which is not an issue in this particular discussion, which was about 
x86 with ACPI support enabled and available, whether in that case (and 
only in that case) we should first try the ACPI reboot ports (that the 
ACPI descriptors advertise) before also trying the other methods (kdb, 
bios, triple fault, etc.) to reboot the box.

	Ingo
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