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Date: Mon, 08 Sep 2014 16:34:33 -0500
From: CyberLeo Kitsana <cyberleo@cyberleo.net>
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Subject: Re: MCA errors
References: <F66A4B1C-8381-4B42-9EF4-662457E68B58@gmail.com>
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On 09/08/2014 01:56 PM, Emmanuelle Delouvée wrote:
> Please, examine the `MCA' error messages
> in the attached files:
> 	MCA-errors_dmesg.txt
> 	MCA-errors_messages.txt
> 
> Q: - do they indicate a hardware problem?
> 	(RAM? CPU? other?)
>    - consequence(s) for the OS?
>    - how to fix?

It appears that you're running a Haswell CPU. Are you running anything
that may use VT-x (e.g. VirtualBox, bhyve) on this machine?

>From my kernel log:
----8<----
CPU: Intel(R) Xeon(R) CPU E3-1245 v3 @ 3.40GHz (3392.50-MHz K8-class
CPU) Origin = "GenuineIntel"  Id = 0x306c3  Family = 0x6  Model = 0x3c
Stepping = 3
[...]
MCA: Bank 0, Status 0x90000040000f0005
MCA: Global Cap 0x0000000000000c09, Status 0x0000000000000000
MCA: Vendor "GenuineIntel", ID 0x306c3, APIC ID 6
MCA: CPU 6 COR (1) internal parity error
MCA: Bank 0, Status 0x90000040000f0005
MCA: Global Cap 0x0000000000000c09, Status 0x0000000000000000
MCA: Vendor "GenuineIntel", ID 0x306c3, APIC ID 6
MCA: CPU 6 COR (1) internal parity error
----8<----

This only happens when I'm running a VM in VirtualBox; regardless, the
machine is rock solid. My research leads me to believe it's a bug in
Haswell's VT-x implementation.

-- 
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