Machine Check Exception: 0...04

From: Mr. James W. Laferriere
Date: Sat Jun 16 2007 - 17:03:04 EST


Hello All , Does anoyone know howto identify a cause for these(*) ?
Or of any tools to help in the identification of the cause ?
So far the Machine checks only happen when I am running bonnie++ against
my software raid6 array .

I have done everything I know to do to attempt to ascertain what is
causing the machine checks .
ie:
1) memtest86+ for days , no errors .
2) cpuburnP6 , The tests run were 'cpuburnP6 E' & 'cpuburnP6 H' for ~
60 minutes each . All CPU's & HT were at 96+<->100% for 60+ Minutes ,
no excessive heating or lockups . In single user mode of course .
I know cpuburn is old but it can excersize the comms between l1 & cpu
& l1 & l2 -> cpu if done right .

(*)
CPU 5: Machine Check Exception: 0000000000000004
CPU 4: Machine Check Exception: 0000000000000004
Kernel panic - not syncing: Unable to continue
<system reboots>

root@(none):~ # uname -a
Linux (none) 2.6.21.5 #1 SMP Fri Jun 15 04:37:23 UTC 2007 i686 pentium4 i386 GNU/Linux

Complete serial console log of a boot to single user mode is here .

http://www.baby-dragons.com/test-2.6.21.5-mptscsi-4.00.10.00-2007006161326.log

Tia , JimL
--
+-----------------------------------------------------------------+
| James W. Laferriere | System Techniques | Give me VMS |
| Network Engineer | 663 Beaumont Blvd | Give me Linux |
| babydr@xxxxxxxxxxxxxxxx | Pacifica, CA. 94044 | only on AXP |
+-----------------------------------------------------------------+

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