Re: [Xen-devel] cpuidle causing Dom0 soft lockups

["Jan Beulich" <JBeulich@xxxxxxxxxx>]

>>> Keir Fraser <keir.fraser@xxxxxxxxxxxxx> 21.01.10 11:11 >>>
>On 21/01/2010 09:51, "Jan Beulich" <JBeulich@xxxxxxxxxx> wrote:
>
>> While I don't know this code well, it would seem that we're suffering
>> from extremely long wakeup times. This suggests that there likely is
>> a (performance) problem even for smaller numbers of vCPU-s.
>> Hence, unless it can be fixed before 4.0 releases, I would suggest
>> disabling C-state management by default again.
>
>It's enabled in 3.4 by feault too though, already. Are there problems there
>too?

We never shipped 3.4.x for anything that would normally be run on
large systems. And 3.4 doesn't support more than 32 vCPU-s per
domain, hence the problem - even if present - would be hidden.

Jan


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