From mboxrd@z Thu Jan 1 00:00:00 1970 From: "David S. Ahern" Subject: Re: [PATCH 5/5] Fix kdump under KVM. Date: Fri, 30 Oct 2009 12:03:20 -0600 Message-ID: <4AEB2A68.70602@cisco.com> References: <1256661667-9298-1-git-send-email-clalance@redhat.com> <1256661667-9298-6-git-send-email-clalance@redhat.com> <20091027174246.GA10473@amt.cnet> <4AE81B36.5010104@redhat.com> <20091028124100.GA3063@amt.cnet> <4AEADADD.7070501@redhat.com> <20091030130712.GA2778@amt.cnet> <4AEB0601.10103@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: Marcelo Tosatti , kvm@vger.kernel.org, Avi Kivity To: Chris Lalancette Return-path: Received: from sj-iport-6.cisco.com ([171.71.176.117]:41002 "EHLO sj-iport-6.cisco.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932730AbZJ3SDQ (ORCPT ); Fri, 30 Oct 2009 14:03:16 -0400 In-Reply-To: <4AEB0601.10103@redhat.com> Sender: kvm-owner@vger.kernel.org List-ID: On 10/30/2009 09:28 AM, Chris Lalancette wrote: >> >> For VMX, the guests TSC's are now usually synchronized (which was not >> the case before, when this patch was written). For AMD, they start out >> of sync. >> >> Migration also causes them to be out of sync. So i'd prefer to postpone >> the removal of this limitation until there is a guarantee the TSCs >> are synchronized across vcpus. > > OK. I'll try to get on an unsynchronized TSC machine and see if I can reproduce > there. Perhaps Marcelo was referring to his patchset from December 2008 targeting TSC synchronization? http://www.mail-archive.com/kvm@vger.kernel.org/msg08071.html David