Date: Fri, 24 Dec 2010 20:48:08 -0800 From: Carl Johnson <carlj@peak.org> To: freebsd-stable@freebsd.org Subject: Re: MCA messages after upgrade to 8.2-BEAT1 Message-ID: <87r5d6e9vb.fsf@oak.localnet> In-Reply-To: <AANLkTin_2PsAL-N3Sct-S9Do7qCnR6-Dubwt1GOKgD-r@mail.gmail.com> (Alan Cox's message of "Fri, 24 Dec 2010 18:03:55 -0600") References: <4D11F1F5.7050902@quip.cz> <201012220957.26854.jhb@freebsd.org> <4D13A579.8090004@langille.org> <AANLkTi=yWh5_0anXyYs4u9KiKpZnC%2BqW%2BAG8YF1Ogbt2@mail.gmail.com> <87vd2iepkv.fsf@oak.localnet> <AANLkTin_2PsAL-N3Sct-S9Do7qCnR6-Dubwt1GOKgD-r@mail.gmail.com>
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Alan Cox <alan.l.cox@gmail.com> writes: > On Fri, Dec 24, 2010 at 5:08 PM, Carl Johnson <carlj@peak.org> wrote: > >> Alan Cox <alan.l.cox@gmail.com> writes: >> >> > 2010/12/23 Dan Langille <dan@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. -- Carl Johnson carlj@peak.org
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