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Date:      Mon, 23 Aug 2010 09:44:38 +0300
From:      Andriy Gapon <avg@icyb.net.ua>
To:        Dan Langille <dan@langille.org>
Cc:        freebsd-stable <freebsd-stable@freebsd.org>
Subject:   Re: kernel MCA messages
Message-ID:  <4C7218D6.6090408@icyb.net.ua>
In-Reply-To: <4C71D756.5080205@langille.org>
References:  <4C71CC62.6060803@langille.org> <4C71D756.5080205@langille.org>

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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



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