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Re: [Xen-devel] High CPU temp, suspend problem - xen 4.1.5-pre, linux 3.7.x

On Tue, Apr 16, 2013 at 4:47 AM, Jan Beulich <JBeulich@xxxxxxxx> wrote:
>>>> On 16.04.13 at 00:09, Marek Marczykowski <marmarek@xxxxxxxxxxxxxxxxxxxxxx> 
>>>> wrote:
>> II. Not (fully) fixed issues:
>> 1. CPU Pool-0 contains only CPU0 after resume - patch quoted above fixes the
>> issue, but it isn't applied to xen-unstable
>> 2. After resume scheduler chooses (almost) only CPU0 (above quoted listing).
>> Removing and re-adding all CPUs to Pool-0 solves the problem. Perhaps some
>> timers are not restarted after resume?
> So I understand there is a patch dealing with this, but I'm not clear
> whether that's known to break CPU pools?

All cpus will end up in cpu pool 0 after S3.
I'm not sure that is "broken" - but it probably isn't ideal either.

IMO - it is better than the alternative state...but Juergen seems to disagree.

>> 3. ACPI C-states are only present for CPU0 (after resume of course), fixed by
>> "xen: Re-upload processor PM data to hypervisor after S3" patch by Ben, but
>> it isn't in upstream linux (nor Konrad's acpi-s3 branches).
> Perhaps this rather ought to be fixed in the hypervisor (to not
> forget the respective information; perhaps also for P-states)?
> After all that's another case where S3 is different from soft or hard
> offlining an individual CPU (in particular we can expect the same
> CPU to come back up during resume, whereas namely a hot-
> unplugged one could get replaced by a [slightly] different one).
> Jan

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