Re: [PATCH v2] cpuidle-haltpoll: Enable kvm guest polling when dedicated physical CPUs are available

[Wanpeng Li]

On Wed, 4 Sep 2019 at 17:48, Rafael J. Wysocki
<rafael.j.wysocki@xxxxxxxxx> wrote:
>
> On 8/29/2019 10:49 AM, Wanpeng Li wrote:
> > From: Wanpeng Li <wanpengli@xxxxxxxxxxx>
> >
> > The downside of guest side polling is that polling is performed even
> > with other runnable tasks in the host. However, even if poll in kvm
> > can aware whether or not other runnable tasks in the same pCPU, it
> > can still incur extra overhead in over-subscribe scenario. Now we can
> > just enable guest polling when dedicated pCPUs are available.
> >
> > Acked-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>
> > Cc: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
> > Cc: Paolo Bonzini <pbonzini@xxxxxxxxxx>
> > Cc: Radim KrÄmÃÅ <rkrcmar@xxxxxxxxxx>
> > Signed-off-by: Wanpeng Li <wanpengli@xxxxxxxxxxx>
>
> As stated before, I'm going to queue up this change for 5.4, with the
> Paolo's ACK.
>
> BTW, in the future please CC power management changes to
> linux-pm@xxxxxxxxxxxxxxx for easier handling.

Ok, thanks.

Wanpeng