This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
Home Products Support Community News


RE: [Xen-devel] [PATCH] Allow dom0 to write MSR IA32_ENERGY_PERF_BIAS

>>> On 05.01.11 at 09:55, "Wei, Gang" <gang.wei@xxxxxxxxx> wrote:
> Jan Beulich wrote on 2011-01-05:
>>>>> On 05.01.11 at 09:22, Keir Fraser <keir@xxxxxxx> wrote:
>>> On 05/01/2011 08:17, "Jan Beulich" <JBeulich@xxxxxxxxxx> wrote:
>>>>>>> On 05.01.11 at 09:13, Keir Fraser <keir.fraser@xxxxxxxxxxxxx> wrote:
>>>>> On 05/01/2011 07:59, "Jan Beulich" <JBeulich@xxxxxxxxxx> wrote:
>>>>>>>> Why would you allow this only if Dom0 has its vcpus pinned?
>>>>>>> It is meaningless if dom0 can't control all pcpus exactly. Only
>>>>>>> in case of dom0 vcpus pinned, it makes sense.
>>>>>> Disagree. The user mode tool could set its own affinity (virtual
>>>>>> and
>>>>>> physical) and then issue the MSR write. Please don't enforce
>>>>>> restrictions where not really needed (I actually suppose that the
>>>>>> restriction should be removed for MSR_IA32_THERM_CONTROL too).
> Ok, I accept such kind of usages. So how about simply check in my patch and 
> do remove these restrictions in your following patches?

Yes, that's what we all seem to agree to now (and I just sent out
that other patch).


Xen-devel mailing list