MCA messages after upgrade to 8.2-BEAT1

[Sergey Kandaurov]

On 25 December 2010 07:48, Carl Johnson <carlj at peak.org> wrote:
> Alan Cox <alan.l.cox at gmail.com> writes:
>
>> On Fri, Dec 24, 2010 at 5:08 PM, Carl Johnson <carlj at peak.org> wrote:
>>
>>> Alan Cox <alan.l.cox at gmail.com> writes:
>>>
>>> > 2010/12/23 Dan Langille <dan at langille.org>
>>> >
>>> >> On 12/22/2010 9:57 AM, John Baldwin wrote:
>>> >>
>>> >>> On Wednesday, December 22, 2010 7:41:25 am Miroslav Lachman wrote:
>>> >>>
>>> >>>> Dec 21 12:42:26 kavkaz kernel: MCA: Bank 0, Status 0xd40e400000000833
>>> >>>> Dec 21 12:42:26 kavkaz kernel: MCA: Global Cap 0x0000000000000105,
>>> >>>> Status 0x0000000000000000
>>> >>>> Dec 21 12:42:26 kavkaz kernel: MCA: Vendor "AuthenticAMD", ID 0x40f33,
>>> >>>> APIC ID 0
>>> >>>> Dec 21 12:42:26 kavkaz kernel: MCA: CPU 0 COR OVER BUSLG Source DRD
>>> >>>> Memory
>>> >>>> Dec 21 12:42:26 kavkaz kernel: MCA: Address 0x236493c0
>>> >>>>
>>> >>>
>>> >>> You are getting corrected ECC errors in your RAM.  You see them once an
>>> >>> hour
>>> >>> because we poll the machine check registers once an hour.  If this
>>> happens
>>> >>> constantly you might have a DIMM that is dying?
>>> >>>
>>> >>
>>> >> John:
>>> >>
>>> >> I take it these ECC errors *may* have been happening for some time. What
>>> >> has changed is the OS now polls for the errors and reports them.
>>> >>
>>> >>
>>> > Yes, we enabled MCA by default in 8.1-RELEASE.
>>>
>>> Is there some reason that it is only available for i386 and not for
>>> amd64?  Linux has something called mcelog, for machine check errors,
>>> which sounds similar and is available for amd64.
>>>
>>>
>> Perhaps I'm misunderstanding your question, but our MCA driver is supported
>> and enabled by default on both i386 and amd64.
>
> Thanks, it appears that I misunderstood.  I ran whereis and found
> /usr/src/sbin/mca and didn't find it on my amd64 system.  I do see it in
> my sysctl listing now that I look there.
>

I guess that's designed for ia64 only
(at least there's no hw.mca.first on other arches).

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