Messages in this thread | | | Date | Tue, 26 Aug 2008 14:24:20 +0100 (BST) | From | "Maciej W. Rozycki" <> | Subject | Re: [PATCH] x86: default to reboot via ACPI |
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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?
> 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.
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.
Failing a better alternative, I suppose the change has to go in though.
Maciej
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