linux-kernel - Re: [PATCH v3 4/9] KVM-HV: KVM Steal time implementation

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Message-ID: <20110629215632.GC3557@mgebm.net>
Date:	Wed, 29 Jun 2011 17:56:32 -0400
From:	Eric B Munson <emunson@...bm.net>
To:	Glauber Costa <glommer@...hat.com>
Cc:	kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
	Rik van Riel <riel@...hat.com>,
	Jeremy Fitzhardinge <jeremy.fitzhardinge@...rix.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Avi Kivity <avi@...hat.com>,
	Anthony Liguori <aliguori@...ibm.com>
Subject: Re: [PATCH v3 4/9] KVM-HV: KVM Steal time implementation

On Wed, 29 Jun 2011, 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>
> CC: Anthony Liguori <aliguori@...ibm.com>
> CC: Eric B Munson <emunson@...bm.net>

Tested-by: Eric B Munson <emunson@...bm.net>


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