Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
MIME-Version: 1.0
References: <1567068597-22419-1-git-send-email-wanpengli@tencent.com> <a70aeec2-1572-ea09-a0c5-299cd70ddc8a@intel.com>
In-Reply-To: <a70aeec2-1572-ea09-a0c5-299cd70ddc8a@intel.com>
From:   Wanpeng Li <kernellwp@gmail.com>
Date:   Thu, 5 Sep 2019 08:15:44 +0800
Message-ID: <CANRm+Czb07GGy7pP2NRLhaXV4yy01ozdqH34CTSMCSJPR1ZfPw@mail.gmail.com>
Subject: Re: [PATCH v2] cpuidle-haltpoll: Enable kvm guest polling when
 dedicated physical CPUs are available
To:     "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
Cc:     LKML <linux-kernel@vger.kernel.org>, kvm <kvm@vger.kernel.org>,
        Paolo Bonzini <pbonzini@redhat.com>,
        =?UTF-8?B?UmFkaW0gS3LEjW3DocWZ?= <rkrcmar@redhat.com>,
        Marcelo Tosatti <mtosatti@redhat.com>,
        Linux PM <linux-pm@vger.kernel.org>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

On Wed, 4 Sep 2019 at 17:48, Rafael J. Wysocki
<rafael.j.wysocki@intel.com> wrote:
>
> On 8/29/2019 10:49 AM, Wanpeng Li wrote:
> > From: Wanpeng Li <wanpengli@tencent.com>
> >
> > 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@redhat.com>
> > Cc: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
> > Cc: Paolo Bonzini <pbonzini@redhat.com>
> > Cc: Radim Kr=C4=8Dm=C3=A1=C5=99 <rkrcmar@redhat.com>
> > Signed-off-by: Wanpeng Li <wanpengli@tencent.com>
>
> 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@vger.kernel.org for easier handling.

Ok, thanks.

Wanpeng