From mboxrd@z Thu Jan  1 00:00:00 1970
From: Rik van Riel <riel@redhat.com>
Subject: Re: [PATCH 07/18] Fix deep C-state TSC desynchronization
Date: Wed, 14 Jul 2010 12:14:51 -0400
Message-ID: <4C3DE27B.6000005@redhat.com>
References: <1278987938-23873-1-git-send-email-zamsden@redhat.com> <1278987938-23873-8-git-send-email-zamsden@redhat.com>
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Cc: KVM <kvm@vger.kernel.org>, Avi Kivity <avi@redhat.com>,
	Marcelo Tosatti <mtosatti@redhat.com>,
	Glauber Costa <glommer@redhat.com>,
	Linux-kernel <linux-kernel@vger.kernel.org>
To: Zachary Amsden <zamsden@redhat.com>
Return-path: <linux-kernel-owner@vger.kernel.org>
In-Reply-To: <1278987938-23873-8-git-send-email-zamsden@redhat.com>
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On 07/12/2010 10:25 PM, Zachary Amsden wrote:
> When CPUs with unstable TSCs enter deep C-state, TSC may stop
> running.  This causes us to require resynchronization.  Since
> we can't tell when this may potentially happen, we assume the
> worst by forcing re-compensation for it at every point the VCPU
> task is descheduled.
>
> Signed-off-by: Zachary Amsden<zamsden@redhat.com>

Reviewed-by: Rik van Riel <riel@redhat.com>

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