Strange Kernel Panics

Jeff Parker parkerjeff at spcollege.edu
Mon Sep 16 13:20:00 CDT 2002


KoGa,
I have had similar experiences with >4Gig memory support (BigMem)
kernels. But if you have 1 gig of memory why run BigMem at all (you
don't need it)? If there is a reason that support for huge memory is
needed I would strip EVERYTHING out of the kernel not absolutely needed
(not a bad practice anyway). I would also be wary of using this kernel
when large amounts of disk I/O will be a part of the servers use (my
experience BigMem+high I/O = me getting calls because a server is down).

This is just my 2-Cents worth, but I hope it helps a bit...

Good luck,
JjP

----------------------------------------------
Jeffrey J. Parker
Systems Analyst
St. Petersburg College, Seminole Campus
9200 113th Street, North
Seminole, Florida 33772
Phone: 727.394.6036  
Fax:   727.394.6264
----------------------------------------------



Hi

Recently I upgraded our PE6300 with 512Megs of ram (now the machine heve

1G) and a SCSI disk.
After installing the upgrades everything looked fine, but after some the

time machine produced a kernel panic.
I tested the ram with memtest86, it could not find any errors.

The kernel is a 2.4.18 with 4G high mem support

Here are some logs:

Sep 12 20:12:40 katyusa kernel: Uhhuh. NMI received for unknown reason
21. Sep 12 20:12:40 katyusa kernel: Dazed and confused, but trying to
continue Sep 12 20:12:40 katyusa kernel: Do you have a strange power
saving mode 
enabled?
Sep 12 20:27:20 katyusa kernel: CPU 0: Machine Check Exception: 
0000000000000004

after running "memtest 1G -l":

Message from syslogd at katyusa at Sun Sep 15 15:26:34 2002 ... katyusa
kernel: CPU 1: Machine Check Exception: 0000000000000004 Message from
syslogd at katyusa at Sun Sep 15 15:26:34 2002 ... katyusa kernel: Bank 0:
b628200022000800 at 3628200022000800 Message from syslogd at katyusa at Sun
Sep 15 15:26:34 2002 ... katyusa kernel: Kernel panic: CPU context
corrupt

Any ideas?

KoGa






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