Re: [Xen-devel] [PATCH 1/3] PAD helper for native and paravirtplatform
From: Jan Beulich
Date: Wed Mar 28 2012 - 10:51:19 EST
>>> On 28.03.12 at 16:27, Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx> wrote:
> On Wed, Mar 28, 2012 at 01:42:45PM +0100, Jan Beulich wrote:
>> >>> On 28.03.12 at 12:48, "Liu, Jinsong" <jinsong.liu@xxxxxxxxx> wrote:
>> > But just curious, what's the purpose and benefit of exposing mwait to dom0?
> So that cstate.c can evaluate properly the deeper C-states and
> can upload them to the hypervisor.
>> > I remember xen against doing so before.
>> And I don't recall anything having changed in that regard.
> Jan, you Acked the patch in question: https://lkml.org/lkml/2012/2/24/129
But that isn't a Xen patch. Xen isn't (and shouldn't be) exposing mwait.
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