Re: Athlon64 + Nforce4 MCE panic

["Avuton Olrich" <avuton@gmail.com>]

On 7/13/06, Rumi Szabolcs <rumi_ml@rtfm.hu> wrote:
> Hello!
>
> Tonight I had a kernel panic (full hang) with the following on the console:
>
> CPU 0: Machine Check Exception: 0000000000000004
> Bank 4: b200000000070f0f
> Kernel panic - not syncing: CPU context corrupt
>
> I tried to decode this:
>
> # ./parsemce -e 0000000000000004 -b 4 -s b200000000070f0f -a 0
> Status: (4) Machine Check in progress.
> Restart IP invalid.
> parsebank(4): b200000000070f0f @ 0
>         External tag parity error
>         CPU state corrupt. Restart not possible
>         Error enabled in control register
>         Error not corrected.
>         Bus and interconnect error
>         Participation: Generic
>         Timeout:
>         Request: Generic error
>         Transaction type : Invalid
>         Memory/IO : Other
>
> # echo 'CPU 0: Machine Check Exception: 0000000000000004 Bank 4: b200000000070f0f' | mcelog --ascii --k8
> HARDWARE ERROR. This is *NOT* a software problem!
> Please contact your hardware vendor
> CPU 0 4 northbridge   Northbridge Watchdog error
>        bit57 = processor context corrupt
>        bit61 = error uncorrected
>   bus error 'generic participation, request timed out
>       generic error mem transaction
>       generic access, level generic'
> STATUS b200000000070f0f MCGSTATUS 4
>
> I've been searching for and found some additional info, it
> looks like I'm not the first experiencing this problem:
>
> http://kerneltrap.org/node/4993
>
> Here ^^^ it is suggested that there was some thread about A64 MCEs
> on LKML but I failed to find it so I decided to post... sorry if
> it's redundant.
>
> The kernel is 2.6.16-gentoo-r9 and the CPU is an A64 "Venice" 3500+
> I can post further hw/sw environment information if req'd.

I had this same problem, search the lkml if you're interested in
investigating this further, I had the problem, was told it was
hardware, replaced my motherboard with the same model, the MCE
continued to occur, replaced the motherboard with a different model
and the MCE went away. It was some Biostar IIRC, but you can check the
archives if you really want to find out.

Good luck
-- 
avuton
--
 Anyone who quotes me in their sig is an idiot. -- Rusty Russell.