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Re: [Xen-devel] [PATCH] pvcpuid: mask TSC invariant bit for various circumstances

  • To: Dan Magenheimer <dan.magenheimer@xxxxxxxxxx>, "Xen-Devel (E-mail)" <xen-devel@xxxxxxxxxxxxxxxxxxx>
  • From: Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
  • Date: Tue, 27 Oct 2009 07:31:36 +0000
  • Cc:
  • Delivery-date: Tue, 27 Oct 2009 00:32:19 -0700
  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>
  • Thread-index: AcpWomSveeFsv7OIRFmwyRJeikHBRAANR700
  • Thread-topic: [Xen-devel] [PATCH] pvcpuid: mask TSC invariant bit for various circumstances

On 27/10/2009 01:09, "Dan Magenheimer" <dan.magenheimer@xxxxxxxxxx> wrote:

>> This only affects PV domUs. I suggest patching pv_cpuid() to
>> catch dom0, and
>> then really all domUs should be handled by
>> xc_cpuid_apply_policy(), which
>> pushes CPUID info down to the hypervisor, as called from xend's
>> image.py:setCpuid(). The advantage of this is that the
>> hypervisor does not
>> need to be informed of the 'disable_migrate' flag at all -- it can be
>> assumed to be true for dom0 -- and it can be handled entirely
>> in the tools.
>> Hence I can get rid of the new domctl, which is nice.
> I'm not done using the disable_migrate flag yet though.
> This was just low-hanging fruit.

Okay. Well I nack this new patch anyway.

 -- Keir

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