Minor Update: Bug occurs under Intel Skylake, too. System-information: Intel Core i7-6700 with 4x8 GB Samsung M378A1G43DB0-CPB DDR4-2133 RAM, Motherboard: Fujitsu D3401-H1
Dec 15 06:53:30 srv01 kernel: [224214.850599] mce: [Hardware Error]: Machine check events logged Dec 15 06:55:08 srv01 kernel: [224312.001142] mce: [Hardware Error]: Machine check events logged Dec 15 06:57:12 srv01 kernel: [224435.836130] mce: [Hardware Error]: Machine check events logged Dec 15 07:03:35 srv01 kernel: [224818.079136] mce: [Hardware Error]: Machine check events logged Dec 15 07:07:55 srv01 kernel: [225077.697589] mce_notify_irq: 1 callbacks suppressed Dec 15 07:07:55 srv01 kernel: [225077.697592] mce: [Hardware Error]: Machine check events logged Dec 15 07:08:51 srv01 kernel: [225134.136571] mce: [Hardware Error]: Machine check events logged Dec 15 07:12:25 srv01 kernel: [225347.598995] mce_notify_irq: 1 callbacks suppressed Dec 15 07:12:25 srv01 kernel: [225347.598998] mce: [Hardware Error]: Machine check events logged Dec 15 07:15:03 srv01 kernel: [225504.880462] mce: [Hardware Error]: Machine check events logged Dec 15 07:17:49 srv01 kernel: [225670.907609] mce: [Hardware Error]: Machine check events logged Dec 15 07:21:49 srv01 kernel: [225911.163547] mce: [Hardware Error]: Machine check events logged Dec 15 07:22:57 srv01 kernel: [225978.227807] mce: [Hardware Error]: Machine check events logged Dec 15 07:24:32 srv01 kernel: [226073.681985] mce: [Hardware Error]: Machine check events logged Dec 15 07:28:31 srv01 kernel: [226312.111733] mce: [Hardware Error]: Machine check events logged Dec 15 07:34:04 srv01 kernel: [226644.639095] mce: [Hardware Error]: Machine check events logged Dec 15 07:35:58 srv01 kernel: [226757.904937] mce_notify_irq: 2 callbacks suppressed Dec 15 07:35:58 srv01 kernel: [226757.904940] mce: [Hardware Error]: Machine check events logged Dec 15 07:36:10 srv01 kernel: [226770.139237] mce: [Hardware Error]: Machine check events logged Dec 15 07:41:14 srv01 kernel: [227073.719040] mce: [Hardware Error]: Machine check events logged Dec 15 07:41:16 srv01 kernel: [227075.399257] mce: [Hardware Error]: Machine check events logged Dec 15 07:44:14 srv01 kernel: [227253.699541] mce: [Hardware Error]: Machine check events logged Dec 15 07:44:57 srv01 kernel: [227296.490305] mce: [Hardware Error]: Machine check events logged Dec 15 07:52:44 srv01 kernel: [227762.621344] mce: [Hardware Error]: Machine check events logged Dec 15 07:52:49 srv01 kernel: [227767.372259] mce: [Hardware Error]: Machine check events logged Dec 15 07:54:39 srv01 kernel: [227877.219677] mce_notify_irq: 1 callbacks suppressed Dec 15 07:54:39 srv01 kernel: [227877.219680] mce: [Hardware Error]: Machine check events logged ... mcelog: Family 6 Model 5e CPU: only decoding architectural errors Hardware event. This is not a software error. MCE 29 CPU 0 BANK 0 TIME 1450162369 Tue Dec 15 07:52:49 2015 MCG status: MCi status: Corrected error Error enabled MCA: Internal parity error STATUS 9000004000010005 MCGSTATUS 0 MCGCAP c0a APICID 0 SOCKETID 0 CPUID Vendor Intel Family 6 Model 94 mcelog: Family 6 Model 5e CPU: only decoding architectural errors Hardware event. This is not a software error. MCE 30 CPU 2 BANK 0 TIME 1450162422 Tue Dec 15 07:53:42 2015 MCG status: MCi status: Corrected error Error enabled MCA: Internal parity error STATUS 9000004000010005 MCGSTATUS 0 MCGCAP c0a APICID 4 SOCKETID 0 CPUID Vendor Intel Family 6 Model 94 mcelog: Family 6 Model 5e CPU: only decoding architectural errors Hardware event. This is not a software error. MCE 31 CPU 1 BANK 0 TIME 1450162479 Tue Dec 15 07:54:39 2015 MCG status: MCi status: Corrected error Error enabled MCA: Internal parity error STATUS 9000004000010005 MCGSTATUS 0 MCGCAP c0a APICID 2 SOCKETID 0 CPUID Vendor Intel Family 6 Model 94 -- 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