linux-kernel - Re: [PATCH v2 2/6] KVM-HV: KVM Steal time implementation

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Message-ID: <4D437179.4070302@redhat.com>
Date:	Fri, 28 Jan 2011 20:46:33 -0500
From:	Rik van Riel <riel@...hat.com>
To:	Glauber Costa <glommer@...hat.com>
CC:	kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
	aliguori@...ibm.com,
	Jeremy Fitzhardinge <jeremy.fitzhardinge@...rix.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Avi Kivity <avi@...hat.com>
Subject: Re: [PATCH v2 2/6] KVM-HV: KVM Steal time implementation

On 01/28/2011 02:52 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.
> This is per-vcpu, and using the kvmclock structure for that is an abuse
> we decided not to make.
>
> In this patchset, I am introducing a new msr, KVM_MSR_STEAL_TIME, that
> holds the memory area address containing information about steal time
>
> This patch contains the hypervisor part for it. I am keeping it separate from
> the headers to facilitate backports to people who wants to backport the kernel
> part but not the hypervisor, or the other way around.
>
> Signed-off-by: Glauber Costa<glommer@...hat.com>
> CC: Rik van Riel<riel@...hat.com>
> CC: Jeremy Fitzhardinge<jeremy.fitzhardinge@...rix.com>
> CC: Peter Zijlstra<peterz@...radead.org>
> CC: Avi Kivity<avi@...hat.com>

Acked-by: Rik van Riel <riel@...hat.com>

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