From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757370Ab1GKNKv (ORCPT ); Mon, 11 Jul 2011 09:10:51 -0400 Received: from mx1.redhat.com ([209.132.183.28]:48694 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753194Ab1GKNKu (ORCPT ); Mon, 11 Jul 2011 09:10:50 -0400 Message-ID: <4E1AF64E.6070305@redhat.com> Date: Mon, 11 Jul 2011 16:10:38 +0300 From: Avi Kivity User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.17) Gecko/20110428 Fedora/3.1.10-1.fc15 Thunderbird/3.1.10 MIME-Version: 1.0 To: Glauber Costa CC: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Rik van Riel , Jeremy Fitzhardinge , Peter Zijlstra , Anthony Liguori , Eric B Munson Subject: Re: [PATCH v5 4/9] KVM-HV: KVM Steal time implementation References: <1309793548-16714-1-git-send-email-glommer@redhat.com> <1309793548-16714-5-git-send-email-glommer@redhat.com> In-Reply-To: <1309793548-16714-5-git-send-email-glommer@redhat.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 07/04/2011 06:32 PM, Glauber Costa wrote: > To implement steal time, we need the hypervisor to pass the guest > information about how much time was spent running other processes > outside the VM, while the vcpu had meaningful work to do - halt > time does not count. > > This information is acquired through the run_delay field of > delayacct/schedstats infrastructure, that counts time spent in a > runqueue but not running. > > Steal time is a per-cpu information, so the traditional MSR-based > infrastructure is used. A new msr, KVM_MSR_STEAL_TIME, holds the > memory area address containing information about steal time > > This patch contains the hypervisor part of the steal time infrasructure, > and can be backported independently of the guest portion. > > Signed-off-by: Glauber Costa > CC: Rik van Riel > CC: Jeremy Fitzhardinge > CC: Peter Zijlstra > CC: Avi Kivity > CC: Anthony Liguori > CC: Eric B Munson I think Peter acked this, yes? Please include his acks. -- I have a truly marvellous patch that fixes the bug which this signature is too narrow to contain.