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Message-ID: <48B40631.5090007@qumranet.com>
Date: Tue, 26 Aug 2008 16:33:37 +0300
From: Avi Kivity <avi@...ranet.com>
To: "Maciej W. Rozycki" <macro@...ux-mips.org>
CC: Alan Cox <alan@...rguk.ukuu.org.uk>, 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
Maciej W. Rozycki wrote:
> On Tue, 26 Aug 2008, Avi Kivity wrote:
>
>
>> Most machines are recent machines.
>>
>
> This is a bold statement I would say. Any numbers to back it up?
>
>
Only common sense. Non-recent machines are barely usable these days.
Sure they work well as a firewall or server-in-a-closet, but if you run
a desktop or a server that actually does useful work, you're running a
relatively recent machine.
>> 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.
>>
>
> If a machine has ACPI and it is broken randomly, then the results can be
> arbitrary. Hopefully not destructively. If even such a simple thing as
> wiring the reset line so that it functions correctly can be got wrong,
> more so can be more complex matters.
>
If we find that the reset was wired to the launch controller after all,
we can back out the change (after we re-evolve technology and Linux;
after all we are doomed to keep reinventing it, aren't we?).
> Failing a better alternative, I suppose the change has to go in though.
>
Let's see what breaks, if any. I understand the disgust people feel
when ACPI is mentioned, but we can't ignore reality.
--
error compiling committee.c: too many arguments to function
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