linux-hyperv.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Thomas Gleixner <tglx@linutronix.de>
To: Dexuan Cui <decui@microsoft.com>
Cc: Haiyang Zhang <haiyangz@microsoft.com>,
	KY Srinivasan <kys@microsoft.com>,
	Stephen Hemminger <sthemmin@microsoft.com>,
	Sasha Levin <Alexander.Levin@microsoft.com>,
	"linux-hyperv@vger.kernel.org" <linux-hyperv@vger.kernel.org>,
	Michael Kelley <mikelley@microsoft.com>,
	Long Li <longli@microsoft.com>, vkuznets <vkuznets@redhat.com>,
	Ingo Molnar <mingo@kernel.org>, "H. Peter Anvin" <hpa@zytor.com>,
	Borislav Petkov <bp@alien8.de>, "x86@kernel.org" <x86@kernel.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"marcelo.cerri@canonical.com" <marcelo.cerri@canonical.com>,
	"driverdev-devel@linuxdriverproject.org" 
	<driverdev-devel@linuxdriverproject.org>,
	"olaf@aepfle.de" <olaf@aepfle.de>,
	"apw@canonical.com" <apw@canonical.com>,
	"jasowang@redhat.com" <jasowang@redhat.com>
Subject: RE: [PATCH] x86/hyper-v: Zero out the VP assist page to fix CPU offlining
Date: Thu, 18 Jul 2019 09:56:16 +0200 (CEST)	[thread overview]
Message-ID: <alpine.DEB.2.21.1907180955130.1778@nanos.tec.linutronix.de> (raw)
In-Reply-To: <PU1P153MB0169BE20761D77E7FD9A3D57BFC80@PU1P153MB0169.APCP153.PROD.OUTLOOK.COM>

On Thu, 18 Jul 2019, Dexuan Cui wrote:
> 
> The concept of the "overlay page" seems weird, and frankly speaking, 
> I don't really understand why the Hyper-V guys invented it, but as far
> as this patch here is concerned, I think the patch is safe and it can
> indeed fix the CPU offlining issue I described.

Then this needs some really good explanation and in the change log because
that's really obscure behaviour.

Thanks,

	tglx

  reply	other threads:[~2019-07-18  7:56 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-07-04  1:45 [PATCH] x86/hyper-v: Zero out the VP assist page to fix CPU offlining Dexuan Cui
2019-07-08  1:41 ` Michael Kelley
2019-07-17 23:03 ` Thomas Gleixner
2019-07-18  1:22   ` Dexuan Cui
2019-07-18  7:00     ` Thomas Gleixner
2019-07-18  7:52       ` Dexuan Cui
2019-07-18  7:56         ` Thomas Gleixner [this message]
2019-07-18  8:04           ` Dexuan Cui

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=alpine.DEB.2.21.1907180955130.1778@nanos.tec.linutronix.de \
    --to=tglx@linutronix.de \
    --cc=Alexander.Levin@microsoft.com \
    --cc=apw@canonical.com \
    --cc=bp@alien8.de \
    --cc=decui@microsoft.com \
    --cc=driverdev-devel@linuxdriverproject.org \
    --cc=haiyangz@microsoft.com \
    --cc=hpa@zytor.com \
    --cc=jasowang@redhat.com \
    --cc=kys@microsoft.com \
    --cc=linux-hyperv@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=longli@microsoft.com \
    --cc=marcelo.cerri@canonical.com \
    --cc=mikelley@microsoft.com \
    --cc=mingo@kernel.org \
    --cc=olaf@aepfle.de \
    --cc=sthemmin@microsoft.com \
    --cc=vkuznets@redhat.com \
    --cc=x86@kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).