From: Wanpeng Li <kernellwp@gmail.com>
To: "Rafael J. Wysocki" <rafael@kernel.org>
Cc: "Marcelo Tosatti" <mtosatti@redhat.com>,
"Paolo Bonzini" <pbonzini@redhat.com>,
"Rafael J. Wysocki" <rafael.j.wysocki@intel.com>,
LKML <linux-kernel@vger.kernel.org>, kvm <kvm@vger.kernel.org>,
"Radim Krčmář" <rkrcmar@redhat.com>,
"Linux PM" <linux-pm@vger.kernel.org>,
"Michael S. Tsirkin" <mst@redhat.com>
Subject: Re: [PATCH] cpuidle-haltpoll: Enable kvm guest polling when dedicated physical CPUs are available
Date: Wed, 28 Aug 2019 16:48:00 +0800 [thread overview]
Message-ID: <CANRm+CyHwAKDGtEDkKz_u9e5pzrV=h8K5=9CWt7Fv+PzYUheHA@mail.gmail.com> (raw)
In-Reply-To: <CAJZ5v0iQc0-WzqeyAh-6m5O-BLraRMj+Z7sqvRgGwh2u2Hp7cg@mail.gmail.com>
On Wed, 28 Aug 2019 at 16:45, Rafael J. Wysocki <rafael@kernel.org> wrote:
>
> On Wed, Aug 28, 2019 at 10:34 AM Wanpeng Li <kernellwp@gmail.com> wrote:
> >
> > On Tue, 27 Aug 2019 at 08:43, Wanpeng Li <kernellwp@gmail.com> wrote:
> > >
> > > Cc Michael S. Tsirkin,
> > > On Tue, 27 Aug 2019 at 04:42, Marcelo Tosatti <mtosatti@redhat.com> wrote:
> > > >
> > > > On Tue, Aug 13, 2019 at 08:55:29AM +0800, Wanpeng Li wrote:
> > > > > On Sun, 4 Aug 2019 at 04:21, Marcelo Tosatti <mtosatti@redhat.com> wrote:
> > > > > >
> > > > > > On Thu, Aug 01, 2019 at 06:54:49PM +0200, Paolo Bonzini wrote:
> > > > > > > On 01/08/19 18:51, Rafael J. Wysocki wrote:
> > > > > > > > On 8/1/2019 9:06 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.
> > > > > > > >>
> > > > > > > >> Cc: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
> > > > > > > >> Cc: Paolo Bonzini <pbonzini@redhat.com>
> > > > > > > >> Cc: Radim Krčmář <rkrcmar@redhat.com>
> > > > > > > >> Cc: Marcelo Tosatti <mtosatti@redhat.com>
> > > > > > > >> Signed-off-by: Wanpeng Li <wanpengli@tencent.com>
> > > > > > > >
> > > > > > > > Paolo, Marcelo, any comments?
> > > > > > >
> > > > > > > Yes, it's a good idea.
> > > > > > >
> > > > > > > Acked-by: Paolo Bonzini <pbonzini@redhat.com>
> >
> > Hi Marcelo,
> >
> > If you don't have more concern, I guess Rafael can apply this patch
> > now since the merge window is not too far.
>
> I will likely queue it up later today and it will go to linux-next
> early next week.
Thank you, Rafael.
Regards,
Wanpeng Li
next prev parent reply other threads:[~2019-08-28 8:47 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1564643196-7797-1-git-send-email-wanpengli@tencent.com>
2019-08-01 16:51 ` [PATCH] cpuidle-haltpoll: Enable kvm guest polling when dedicated physical CPUs are available Rafael J. Wysocki
2019-08-01 16:54 ` Paolo Bonzini
2019-08-03 20:21 ` Marcelo Tosatti
2019-08-13 0:55 ` Wanpeng Li
2019-08-13 7:55 ` Paolo Bonzini
2019-08-26 20:40 ` Marcelo Tosatti
2019-08-27 0:43 ` Wanpeng Li
2019-08-28 8:35 ` Wanpeng Li
2019-08-28 8:45 ` Rafael J. Wysocki
2019-08-28 8:48 ` Wanpeng Li [this message]
2019-08-28 14:39 ` Marcelo Tosatti
2019-08-28 23:37 ` Rafael J. Wysocki
2019-08-29 12:04 ` Marcelo Tosatti
2019-08-29 12:16 ` Wanpeng Li
2019-08-29 12:53 ` Marcelo Tosatti
2019-08-29 14:39 ` Marcelo Tosatti
2019-08-28 14:48 ` Marcelo Tosatti
2019-08-28 14:52 ` Marcelo Tosatti
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