From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:56882) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Xefzu-0008LR-JB for qemu-devel@nongnu.org; Thu, 16 Oct 2014 04:01:27 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Xefzo-0002yX-W1 for qemu-devel@nongnu.org; Thu, 16 Oct 2014 04:01:22 -0400 Received: from indium.canonical.com ([91.189.90.7]:38608) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Xefzo-0002yR-Q1 for qemu-devel@nongnu.org; Thu, 16 Oct 2014 04:01:16 -0400 Received: from loganberry.canonical.com ([91.189.90.37]) by indium.canonical.com with esmtp (Exim 4.76 #1 (Debian)) id 1Xefzo-000075-3i for ; Thu, 16 Oct 2014 08:01:16 +0000 Received: from loganberry.canonical.com (localhost [127.0.0.1]) by loganberry.canonical.com (Postfix) with ESMTP id 175992E80C3 for ; Thu, 16 Oct 2014 08:01:16 +0000 (UTC) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Date: Thu, 16 Oct 2014 07:50:38 -0000 From: Ilya Almametov <1307225@bugs.launchpad.net> Sender: bounces@canonical.com References: <20140413204536.17279.23843.malonedeb@chaenomeles.canonical.com> Message-Id: <20141016075038.18167.36368.malone@chaenomeles.canonical.com> Errors-To: bounces@canonical.com Subject: [Qemu-devel] [Bug 1307225] Re: Running a virtual machine on a Haswell system produces machine check events Reply-To: Bug 1307225 <1307225@bugs.launchpad.net> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Just my 2 cents. I have two Haswell boxes with Ubuntu Server 14.04 each running bunch of VMs. The first one is Intel Core i7-4770K and it runs only Linux VMs. There is no single MCE here for at least one year. The second box is Intel Core i7-4790K and it runs mix of Linux and Windows 2003 VMs. MCEs regularly appear in logs here. -- = You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1307225 Title: Running a virtual machine on a Haswell system produces machine check events Status in QEMU: New Bug description: I'm running a virtual Windows SBS 2003 installation on a Xeon E3 Haswell system running Gentoo Linux. First, I used Qemu 1.5.3 (the latest stable version on Gentoo). I got a lot of machine check events ("mce: [Hardware Error]: Machine check events logged") in dmesg that always looked like (using mcelog): Hardware event. This is not a software error. MCE 0 CPU 3 BANK 0 TIME 1397455091 Mon Apr 14 07:58:11 2014 MCG status: MCi status: Corrected error Error enabled MCA: Internal parity error STATUS 90000040000f0005 MCGSTATUS 0 MCGCAP c09 APICID 6 SOCKETID 0 CPUID Vendor Intel Family 6 Model 60 I found this discussion on the vmware community: https://communities.vmware.com/thread/452344 It seems that this is (at least partly) caused by the Qemu machine. I switched to Qemu 1.7.0, the first version to use "pc-i440fx-1.7". With this version, the errors almost disappeared, but from time to time, I still get machine check events. Anyways, they so not seem to affect neither the vm, nor the host. The Haswell machine has been set up and running for several days without a single error message. They only appear when the VM is running. so I think this is actually some problem with the Haswell architecture (and not a real hardware error). To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1307225/+subscriptions