linux-kernel - Re: [PATCH 10/18] Keep SMP VMs more in sync on unstable TSC

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Message-ID: <4C3E6EE6.2010606@redhat.com>
Date:	Wed, 14 Jul 2010 22:13:58 -0400
From:	Rik van Riel <riel@...hat.com>
To:	Zachary Amsden <zamsden@...hat.com>
CC:	KVM <kvm@...r.kernel.org>, Avi Kivity <avi@...hat.com>,
	Marcelo Tosatti <mtosatti@...hat.com>,
	Glauber Costa <glommer@...hat.com>,
	Linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 10/18] Keep SMP VMs more in sync on unstable TSC

On 07/12/2010 10:25 PM, Zachary Amsden wrote:
> SMP VMs on machines with unstable TSC have their TSC offset adjusted by the
> local offset delta from last measurement.  This does not take into account how
> long it has been since the measurement, leading to drift.  Minimize the drift
> by accounting for any time difference the kernel has observed.
>
> Signed-off-by: Zachary Amsden<zamsden@...hat.com>

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

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