Parity Error In Kernel
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or posting ads with us Unix & Linux Questions Tags Users Badges Unanswered Ask Question _ Unix & Linux Stack Exchange is a question and answer site for users of Linux, FreeBSD and other Un*x-like operating systems. Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top MCE error: MCA: Internal parity error up vote 3 down vote favorite I https://kb.juniper.net/index?page=content&id=KB18931&actp=RSS have an unstable machine running Ubuntu 14.04 LTS which passes 9 hours of memtest86. I get these: Hardware event. This is not a software error. MCE 0 CPU 1 BANK 0 TIME 1414735539 Fri Oct 31 17:05:39 2014 MCG status: MCi status: Corrected error Error enabled MCA: Internal parity error STATUS 9000004000010005 MCGSTATUS 0 MCGCAP c09 APICID 2 SOCKETID 0 CPUID Vendor Intel Family 6 Model 58` This is when the machine keeps going. I don't yet have one for when the http://unix.stackexchange.com/questions/165222/mce-error-mca-internal-parity-error machine freezes. What's "MCE 0"? And "MCA"? And am I looking at a CPU error or a RAM error? I've got one stick of 8 GB of RAM. What is the order I should replace the hardware (RAM, CPU, Motherboard, power supply)? The machine used to be stable. Should I up the CPU voltage a bit? I've read the mcelog FAQ. Google results are sparse, and most have other formats of similar messages (ie. old versions of the kernel/MCE maybe). linux hardware intel stability share|improve this question edited Nov 1 '14 at 5:13 asked Oct 31 '14 at 11:36 Greg Bell 21729 A single bit error can happen infrequently, that's why servers have parity memory. If this happens a lot then there's a problem. I'd begin by replacing the RAM; perhaps just reseating the DIMM might help. Increasing the RAM voltage (just a little bit) may also help. I once had a motherboard where the voltage controller was decaying, every week I needed to increase the RAM voltage to get it to boot, in the end it couldn't go up any higher and I replaced the motherboard. –wurtel Oct 31 '14 at 12:19 Yeah, the problem here is that I've just started watching mcelog's output because of the freezes. I'm trying to catch what error causes the actual freeze, and this one wasn't it. But am I looking at a cache memory parity error or one from system memory? &ndash
sorted by: [ date ] [ thread ] [ subject ] [ author ] Hello, I'm running since some days a recent -HEAD https://lists.freebsd.org/pipermail/freebsd-hackers/2015-January/046878.html r276659 on an Acer C720 Chromebook which works very nicely and fast https://bugzilla.redhat.com/show_bug.cgi?id=1152717 (I really have never seen such a fast KDE4 desktop). >From time to time (let's say 2-3 times a day) I see messages like this in /var/log/messages: Jan 16 12:04:24 c720-r276659 kernel: MCA: Bank 0, Status 0x90000040000f0005 Jan 16 12:04:24 c720-r276659 kernel: MCA: Global Cap 0x0000000000000c07, Status parity error 0x0000000000000000 Jan 16 12:04:24 c720-r276659 kernel: MCA: Vendor "GenuineIntel", ID 0x40651, APIC ID 0 Jan 16 12:04:24 c720-r276659 kernel: MCA: CPU 0 COR (1) internal parity error the kernel is: # uname -a FreeBSD c720-r276659 11.0-CURRENT FreeBSD 11.0-CURRENT #0 r276659M: Tue Jan 6 12:55:25 CET 2015 guru at vm-poudriere-r269739:/usr/local/acerC720/obj/usr/local/acerC720/src/sys/GENERIC i386 i.e. the i386 version (because I compile everything, kernel parity error in and ports, in a VMbox) I'm attaching below the complete 'dmesg' lines with the information details about the CPU. I raised questions about these MCA messages in freebsd-current@ and was pointed to a tool in ports/sysutils/mcelog. Jeremy Chadwick
Requests | Help | NewAccount | Log In [x] | Forgot Password Login: [x] Format For Printing -XML -Clone This Bug -Last Comment First Last Prev Next This bug is not in your last search results. Bug1152717 - I have kernel oops "mce: [Hardware Error]: Machine check events logged" but mcelog not provide any additional information Summary: I have kernel oops "mce: [Hardware Error]: Machine check events logged" but m... Status: CLOSED EOL Aliases: None Product: Fedora Classification: Fedora Component: mcelog (Show other bugs) Sub Component: --- Version: 21 Hardware: Unspecified Unspecified Priority unspecified Severity unspecified TargetMilestone: --- TargetRelease: --- Assigned To: Prarit Bhargava QA Contact: Fedora Extras Quality Assurance Docs Contact: URL: Whiteboard: Keywords: Depends On: Blocks: Show dependency tree /graph Reported: 2014-10-14 15:06 EDT by Mikhail Modified: 2015-12-02 11:23 EST (History) CC List: 3 users (show) beland igor.redhat prarit See Also: Fixed In Version: Doc Type: Bug Fix Doc Text: Story Points: --- Clone Of: Environment: Last Closed: 2015-12-01 23:17:54 EST Type: Bug Regression: --- Mount Type: --- Documentation: --- CRM: Verified Versions: Category: --- oVirt Team: --- RHEL 7.3 requirements from Atomic Host: Cloudforms Team: --- Attachments (Terms of Use) oops-2014-10-14-22:19:50-716-0 (32.23 KB, application/x-gzip) 2014-10-14 15:06 EDT, Mikhail no flags Details kernel 3.17.7 log (128.37 KB, text/plain) 2015-01-01 12:23 EST, Mikhail no flags Details collection of oops (284.02 KB, application/x-7z-compressed) 2015-01-02 07:47 EST, Mikhail no flags Details Add an attachment (proposed patch, testcase, etc.) Groups: None (edit) Description Mikhail 2014-10-14 15:06:53 EDT Created attachment 947005 [details] oops-2014-10-14-22:19:50-716-0 Description of problem: I have kernel oops "mce: [Hardware Error]: Machine check events logged" but mcelog not provide any additional information :( [root@localhost ~]# mcelog [root@localhost ~]# cat /dev/mcelog # rpm -q mcelog mcelog-1.0-0.13.f0d7654.fc21.x86_64 Comment 1 Prarit Bhargava 2014-12-22 08:29:06 EST Mikhail, I have done an update of the mcelog package. Could you test and add karma so that it gets pushed to stable? https://admin.fedoraproject.org/updates/FEDORA-2014-173