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[Xen-devel] RE: [PATCH 4/4] ACPI: Enable THERM_CONTROL MSR write for dom0 even cpufreq=xen


  • To: Keir Fraser <keir.fraser@xxxxxxxxxxxxx>, xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>
  • From: "Wei, Gang" <gang.wei@xxxxxxxxx>
  • Date: Tue, 3 Mar 2009 09:23:39 +0800
  • Accept-language: en-US
  • Acceptlanguage: en-US
  • Cc:
  • Delivery-date: Mon, 02 Mar 2009 17:24:08 -0800
  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>
  • Thread-index: AcmYErlDUyweCvc1R7ySGeeN+JHq9QDEtUERAB3zCFA=
  • Thread-topic: [PATCH 4/4] ACPI: Enable THERM_CONTROL MSR write for dom0 even cpufreq=xen

>> Enable THERM_CONTROL MSR write for dom0 even cpufreq=xen
>> 
>> Signed-off-by: Wei Gang <gang.wei@xxxxxxxxx>
> 
> If dom0 is not the cpufreq controller then it is not pinned onto particular
> physical CPUs and fiddling with MSRs is rather suspect.

Yes, you are right. But what we really need is simply pinning dom0 vcpus, not 
dom0 acting as cpufreq controller, am I right?
We do expect the MSR throttling still work while xen behaves  as the cpufreq 
controller.

Jimmy
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