Re: [Xen-devel] poweroff in 3.2 and 3.3

["Jan Beulich" <jbeulich@xxxxxxxxxx>]

>>> Keir Fraser <keir.fraser@xxxxxxxxxxxxx> 20.11.08 09:18 >>>
>On 20/11/08 08:18, "Jan Beulich" <jbeulich@xxxxxxxxxx> wrote:
>
>>> Comment says "Only s3 is using this path", instead of "this path
>>> can only be used by s3". :-) At that time cpu online/offline is not
>>> supported and thus only s3 is the user on that path. If you look at
>>> latest xen upstream with cpu offline support, that comment went
>>> away.
>> 
>> But my point is that this is wrong (no matter how it's worded): entering
>> S5 also uses this path, and in that case there's nothing that stops
>> non-current vCPU-s of dom0.
>
>If you're powering off, why does it matter if VCPUs are paused or not?

Because they can prevent the idle vCPU-s from being entered as needed
in order to fully bring down pCPU-s. This is what a customer is reporting
(on 3.2), prompting the start of this mail thread. And I've too seen
occasional problems with pCPU-s going down prior to power off, just not
as bad as they do (where things end up in a panic).

Jan


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