From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jan Kiszka Subject: Re: bad leakage between virtual machines? Date: Fri, 15 Jan 2010 18:37:57 +0100 Message-ID: <4B50A7F5.4020708@siemens.com> References: <20100115101706.4fb8897a@tomh.ccur.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: kvm@vger.kernel.org To: Tom Horsley Return-path: Received: from goliath.siemens.de ([192.35.17.28]:19751 "EHLO goliath.siemens.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757400Ab0AORh6 (ORCPT ); Fri, 15 Jan 2010 12:37:58 -0500 In-Reply-To: <20100115101706.4fb8897a@tomh.ccur.com> Sender: kvm-owner@vger.kernel.org List-ID: Tom Horsley wrote: > I just submitted this fedora bug with lots of details: > > https://bugzilla.redhat.com/show_bug.cgi?id=555788 > > It sure seems to me like the contents of the debug > address trap registers are leaking across virtual machines > (at least for opterons on this motherboard :-). Are only AMD boxes affected, or did you also test on Intel? > > Anyone seen anything like this before? (I've been > having similar problems on this host since it was > running xen 3.1 before switching to kvm). I still have one debug register oddity on my todo list (that one causes an unhandled VM exit), but I'm not aware of such an issue nor do I remember any patch between 2.6.31.x and now at the moment that may have fixed it. Nevertheless, could you retry with latest kvm kernel or a recent kvm-kmod release? Jan -- Siemens AG, Corporate Technology, CT T DE IT 1 Corporate Competence Center Embedded Linux