Machine Check Exception

Machine Check Exception

[Felix von Leitner]

As soon as I start oggenc on my 2.5 kernel, I get this message:

  CPU 0: Machine Check Exception: 0000000000000004
  Bank 0: f60600000000135 at 000000001ea46db0
  Kernel panic: CPU context corrupt

This vc then hangs, but I could log in and write down the message on
another vc.  Is this a hardware error?  Should I replace my CPU?  My
memory?  Is my machine overheating?  I have had several strange and
unexplained segfaults and reboots under 2.4 recently.

Felix

Re: Machine Check Exception

[Jan-Benedict Glaw]

[-- Attachment #1: Type: text/plain, Size: 1072 bytes --]

On Sun, 2002-12-15 21:22:27 +0100, Felix von Leitner <felix-kernel@fefe.de>
wrote in message <20021215202227.GA7375@codeblau.de>:
> As soon as I start oggenc on my 2.5 kernel, I get this message:
> 
>   CPU 0: Machine Check Exception: 0000000000000004
>   Bank 0: f60600000000135 at 000000001ea46db0
>   Kernel panic: CPU context corrupt
> 
> This vc then hangs, but I could log in and write down the message on
> another vc.  Is this a hardware error?  Should I replace my CPU?  My
> memory?  Is my machine overheating?  I have had several strange and
> unexplained segfaults and reboots under 2.4 recently.

Probably you're suffering from bad RAM. Please create a memtest86 boot
floppy and try it in your own... Segfaults and reboots mostly are bad
CPU fans or bad RAM:-p

MfG, JBG

-- 
   Jan-Benedict Glaw       jbglaw@lug-owl.de    . +49-172-7608481
   "Eine Freie Meinung in  einem Freien Kopf    | Gegen Zensur
    fuer einen Freien Staat voll Freier Bürger" | im Internet!
   Shell Script APT-Proxy: http://lug-owl.de/~jbglaw/software/ap2/

[-- Attachment #2: Type: application/pgp-signature, Size: 189 bytes --]

Re: Machine Check Exception

[Felipe W Damasio]

Felix von Leitner wrote:
> As soon as I start oggenc on my 2.5 kernel, I get this message:
> 
>   CPU 0: Machine Check Exception: 0000000000000004
>   Bank 0: f60600000000135 at 000000001ea46db0
>   Kernel panic: CPU context corrupt
> 
> This vc then hangs, but I could log in and write down the message on
> another vc.  Is this a hardware error?  Should I replace my CPU?  My
> memory?  Is my machine overheating?  I have had several strange and
> unexplained segfaults and reboots under 2.4 recently.

	Looks like a instruction fetch error from the level 1 cache.

	Your CPU may be overheating, yes. Or it could even be a faulty processor.

	Could you please check your cooler? What's the average CPU temp.?

Felipe

Machine Check Exception

[Matteo Croce]

Hi,

while bugging the wireless devs about a freeze i've discovered an hardware 
bug:

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

this is triggered byt the ath9k wireless driver when booting with smp > 1
here is the kernel bug report:
http://bugzilla.kernel.org/show_bug.cgi?id=11527#c68

here I asked support in the official AMD forum:
http://forums.amd.com/forum/messageview.cfm?catid=22&threadid=101051


I ask you this as you are the "CPU ERRATA WORKAROUNDS" man,
and I CC people which are listed in the "X86 ARCHITECTURE (32-BIT AND 64-BIT)"
entry.

Best Regards,
Matteo Croce