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Re: [Xen-devel] [patch 14/33] xen: xen time implementation

To: Keir Fraser <keir@xxxxxxxxxxxxx>
From: Andi Kleen <ak@xxxxxxx>
Date: Wed, 6 Jun 2007 14:18:28 +0200
Cc: Jeremy Fitzhardinge <jeremy@xxxxxxxx>, Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>, lkml <linux-kernel@xxxxxxxxxxxxxxx>, Jan Beulich <jbeulich@xxxxxxxxxx>, Chris Wright <chrisw@xxxxxxxxxxxx>, virtualization@xxxxxxxxxxxxxx, Thomas Gleixner <tglx@xxxxxxxxxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>, Ingo Molnar <mingo@xxxxxxx>
Delivery-date: Wed, 06 Jun 2007 05:16:51 -0700
List-id: Xen developer discussion <xen-devel.lists.xensource.com>

> 
> Yes, this could be an issue. Is there any way to get an interrupt or MCE
> when thermal throttling occurs?

Yes you can get an thermal interrupt from the local APIC. See the Linux
kernel source. Of course there would be still a race window.

On the other hand some timing issues on throttling are probably 
the smallest of the users' problems when it really happens.

Standard Linux just ignores it.

-Andi



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