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xen-devel
Re: [Xen-devel] [patch 14/33] xen: xen time implementation
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To: |
"Andi Kleen" <ak@xxxxxxx>,"Keir Fraser" <keir@xxxxxxxxxxxxx> |
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Subject: |
Re: [Xen-devel] [patch 14/33] xen: xen time implementation |
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From: |
"Jan Beulich" <jbeulich@xxxxxxxxxx> |
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Date: |
Wed, 06 Jun 2007 14:46:59 +0200 |
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Cc: |
Jeremy Fitzhardinge <jeremy@xxxxxxxx>, Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, lkml <linux-kernel@xxxxxxxxxxxxxxx>, Chris Wright <chrisw@xxxxxxxxxxxx>, virtualization@xxxxxxxxxxxxxx, Ingo Molnar <mingo@xxxxxxx>, Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>, Thomas Gleixner <tglx@xxxxxxxxxxxxx> |
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Wed, 06 Jun 2007 05:44:17 -0700 |
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>>> Andi Kleen <ak@xxxxxxx> 06.06.07 14:18 >>>
>
>>
>> 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.
Not if this results in your box hanging - I think throttling is exactly intended
to keep the box alive as long as possible (and I've seen throttling in action,
with the box happily recovering from the situation - after having seen it a
few times I checked and found the fan covered with dust).
>Standard Linux just ignores it.
Jan
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