Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752754Ab1BBKJd (ORCPT ); Wed, 2 Feb 2011 05:09:33 -0500 Received: from mx1.redhat.com ([209.132.183.28]:42271 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751677Ab1BBKJ2 (ORCPT ); Wed, 2 Feb 2011 05:09:28 -0500 Message-ID: <4D492D49.6010408@redhat.com> Date: Wed, 02 Feb 2011 12:09:13 +0200 From: Avi Kivity User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.13) Gecko/20101209 Fedora/3.1.7-0.35.b3pre.fc14 Lightning/1.0b3pre Thunderbird/3.1.7 MIME-Version: 1.0 To: Glauber Costa CC: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, aliguori@us.ibm.com, Rik van Riel , Jeremy Fitzhardinge , Peter Zijlstra Subject: Re: [PATCH v2 2/6] KVM-HV: KVM Steal time implementation References: <1296244340-15173-1-git-send-email-glommer@redhat.com> <1296244340-15173-3-git-send-email-glommer@redhat.com> <4D4563EB.3000203@redhat.com> <1296575320.5081.8.camel@mothafucka.localdomain> <4D483E43.5060904@redhat.com> <1296590310.5081.136.camel@mothafucka.localdomain> In-Reply-To: <1296590310.5081.136.camel@mothafucka.localdomain> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 809 Lines: 27 On 02/01/2011 09:58 PM, Glauber Costa wrote: > > > > Guest reads version (result: 2) > > Guest starts reading data > > Live migration; vcpu->arch.sversion is zeroed > > Steal time update; vcpu->arch.sversion += 2; write to guest > > Guest continues reading data > > Guest reads version (result: 2) > > > > So the guest is unaware that an update has occurred while it was reading > > the data. > Ok, fair. > > By the way, kvmclock have the same problem, then > It needs the same fix then. -- error compiling committee.c: too many arguments to function -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/