From: Neil Brown <neilb@cse.unsw.edu.au>
Subject: Re: kernel Oops in rpc.mountd
Date: Tue, 8 Feb 2005 10:21:37 +1100
Message-ID: <16903.63489.218836.52210@cse.unsw.edu.au>
References: <200502071915.j17JFO7N007650@m27.ligo.caltech.edu>
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To: Stuart Anderson <anderson@ligo.caltech.edu>
In-Reply-To: message from Stuart Anderson on Monday February 7
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On Monday February 7, anderson@ligo.caltech.edu wrote:
> A dual-Xeon FC3 machine just crashed with the following kernel Oops in
> rpc.mounted.  Any ideas on how to debug this?
> 
> kernel-smp-2.6.10-1.760_FC3
> kernel-utils-2.4-13.1.49_FC3
> nfs-utils-1.0.6-44
> portmap-4.0-63
> 
> I am getting about 1 kernel crash per day on a cluster of 290 such boxes
> with different kernel Oops messages.  I do not always get the syslog message,
> but perhaps this one has enough information to track it down.
> 
> Thanks.
> 
> 
> Feb  6 21:49:44 node77 kernel: Unable to handle kernel paging request at virtual address 00100104
                                                                                           ^^^^^^^^
...
> Feb  6 21:49:44 node77 kernel: eax: dff05000   ebx: 00100100   ecx: 0000008f   edx: f8a62fa0
                                                 ^^^^^^^^^^^^^
> Feb  6 21:49:44 node77 kernel: esi: cf874180   edi: 00000000   ebp: f6c5bef4   esp: f6c5bec8


Looks like two flipped bits in memory.  Do you have ECC RAM? Is it
enabled?
What does memtest86 report?

NeilBrown


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