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xen-devel
Re: [Xen-devel] [patch]Add a new reboot method
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To: |
"Chen, Huacai" <huacai.chen@xxxxxxxxx> |
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Subject: |
Re: [Xen-devel] [patch]Add a new reboot method |
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From: |
Alan Cox <alan@xxxxxxxxxxxxxxxxxxx> |
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Date: |
Thu, 29 May 2008 11:26:45 +0100 |
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Cc: |
xen-devel@xxxxxxxxxxxxxxxxxxx, Keir Fraser <keir.fraser@xxxxxxxxxxxxx> |
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Thu, 29 May 2008 03:41:07 -0700 |
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> New chipsets support a new reboot method by writing port 0xcf9,
Some new chipsets. What 0xcf9 does to others is undefined.
> sometimes this is more efficient than "keyboard controller reboot" and
> "triple fault reboot". This patch add this new method and use it as a
> preferable one.
Who cares ?
Since when has the number of microseconds per reboot been remotely
relevant. It simply isn't a performance critical path. Besides which you
properly need to use the ACPI power off method on a newer chipset anyway.
(And I would note if Intel really thought power off efficiency was
important then they wouldn't have invented ACPI...)
Alan
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