I got a new Haswell based system a few days ago. It has been running fine without warnings but today I started a VirtualBox VM and got a MCE soon afterwards. "MCA: Internal parity error" like everyone else. From reading this bug and the vmware link in the first post it seems like this problem occurs on all virtualization solutions using hardware acceleration on Haswell based systems. It happens on Qemu, Virtualbox and Vmware and it happens on both Linux and Windows.
Do anyone have connections within Intel and can pull some strings to have them look at this? It looks like the MCE is always non fatal but perhaps there are other unknown side effects. A microcode update might solve it. -- 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