Re: Houston, we have May 15, 1953 (says guest when host uses cpufreq, and dies)

Tomasz Chmielewski
2009-02-18T16:11:17Z

Anthony Liguori schrieb:
> Tomasz Chmielewski wrote:
>> Is using cpufreq (i.e. with ondemand governor) on KVM host safe for
>> guests?
>>
>> I enabled cpufreq on the host, it scaled down the host CPU (Dual-Core
>> AMD Opteron(tm) Processor 2212) to 1 GHz from 2 GHz.
>
> Not with your processor. Intel processors should be fine and any AMD
> processor that's Barcelona/Phenom or newer.

Looks I'm a bad, bad, anti-environment CO2 contributor then.

From a technical perspective, what are the problems with my CPU that it
scales down on the host just fine, but makes the guests "return to the
past"?