From mboxrd@z Thu Jan 1 00:00:00 1970 From: Paolo Bonzini Subject: TSC deadline timer in guests vs. migration? Date: Mon, 4 Jul 2016 13:01:42 +0200 Message-ID: <759376f0-e0bf-e53a-99e4-598bf14547e3@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit To: Marcelo Tosatti , Eduardo Habkost , David Matlack , Peter Hornyack , KVM list Return-path: Received: from mx1.redhat.com ([209.132.183.28]:60297 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753023AbcGDLBq (ORCPT ); Mon, 4 Jul 2016 07:01:46 -0400 Sender: kvm-owner@vger.kernel.org List-ID: Can bad things happen if a guest using the TSC deadline timer is migrated? The guest doesn't re-calibrate the TSC after migration, and the TSC frequency can and will change unless your data center is perfectly homogeneous. What do you think? Paolo