Subject: Page fault
To: None <netbsd-help@NetBSD.org>
From: Timothy A. Musson <timothy.musson@zin-tech.com>
List: netbsd-help
Date: 10/21/2003 10:52:47
We've had a page fault error on a production machine that caused a kernel
panic. We dug around a bit and did the obligatory google searching, but we're
not quite happy with the level of detail we were able to find. I was hoping
somebody on this list might be able to interpret some of the codes or guess at
what happened. Due to the location of the machine, the error was likely caused
by a radiation single even upset. We're just trying to figure out what part of
the system got corrupted (disk, a lookup table or pointer, etc.) so we can
give
as complete a report as possible. BTW, this machine has no disk, it NFS mounts
another NetBSD machine's drives.

Here's the relevant output from logs:
Oct 17 22:41:49 <host> /netbsd: vm_fault(0xf8685400, 0, 3, 0) -> 1
Oct 17 22:41:49 <host> /netbsd: fatal page fault in supervisor mode
Oct 17 22:41:49 <host> /netbsd: trap type 6 code f8160002 eip f810829c cs
f8100008 eflags 10286 cr2 1 cpl 0
Oct 17 22:41:50 <host> /netbsd: panic: trap
Oct 17 22:41:50 <host> /netbsd: syncing disks... done
Oct 17 22:41:50 <host> /netbsd: NetBSD 1.2.1 (<tag>) #6: Thu Feb 17 14:41:16
EST 2000


Thanks in advance,
Tim