kernel MCA messages

[Andriy Gapon]

on 23/08/2010 05:05 Dan Langille said the following:
> On 8/22/2010 9:18 PM, Dan Langille wrote:
>> What does this mean?
>>
>> kernel: MCA: Bank 4, Status 0x940c4001fe080813
>> kernel: MCA: Global Cap 0x0000000000000105, Status 0x0000000000000000
>> kernel: MCA: Vendor "AuthenticAMD", ID 0xf5a, APIC ID 0
>> kernel: MCA: CPU 0 COR BUSLG Source RD Memory
>> kernel: MCA: Address 0x7ff6b0
>>
>> FreeBSD 7.3-STABLE #1: Sun Aug 22 23:16:43
> 
> And another one:
> 
> kernel: MCA: Bank 4, Status 0x9459c0014a080813
> kernel: MCA: Global Cap 0x0000000000000105, Status 0x0000000000000000
> kernel: MCA: Vendor "AuthenticAMD", ID 0xf5a, APIC ID 0
> kernel: MCA: CPU 0 COR BUSLG Source RD Memory
> kernel: MCA: Address 0x7ff670

I believe that you get correctable RAM ECC errors, but not entirely sure.
There is mcelog utility that decodes such messages into human-friendly descriptions.
The utility is available on Linux-based systems.
John Baldwin has a port of it to FreeBSD, but it seems to be WIP and is private
so far.  Wait and watch John posting decoded text in this thread :-)

-- 
Andriy Gapon