On Tuesday 29 January 2008 13:04:48 Drew wrote:
> Hello,
> I'm posting this in the hopes that someone can point me in the right
> direction, and that it may possibly help someone else. The kernel panic
> below is generated at boot, and is reproduceable as many times as you want
> to do it. A few details on the hardware, the machine is a couple of years
> old, but never displayed any real instability. My only suspect hardware is
> the hard drive itself, and possibly ram, however seatools and memtest clear
> them both with flying colors, for what that's worth. The machine is an
> Athlon XP1900+, and I'm still running GENERIC (I usually compile something
> custom after a machine has been up and going a while, but this was only
> installed this past week) and the machine is under light load at best,
> running natd, apache, mysql and postfix for my home network. One thing I
> will point out is that the power went out yesterday on this machine, and
> while the UPS's normally keep everything up, apparently the power was out
> for more than 30 minutes because all of my machine's rebooted. When this
> one came back up, it had hosed /var/log, but a good fsck cleared that up.
> Later it quit working, and I got a brief look at a panic before it rebooted
> - I know nothing about the first panic other than it was a kernel panic.
> When it rebooted it came back to where it would mount / and stopped, with
> the infamous mountroot> prompt. I politely advised it that it needed to
> look ufs:ad1s1a and got the following panic - forgive any formating errors
> on my part - I assure you the information I copied off the screen is
> correct.
> Warning: / was not properly dismounted
> Fatal Trap 12: page fault while in kernel mode
> cpuid = 0, apic id = 00
> fault virtual address = 0x188
> fault code = supervisor read, page not present
> instruction pointer = 0x20 : 0xc0747d14
> stack pointer = 0x28 : 0xe3391aa0
> frame pointer = 0x28 : 0xe3391ab8
> code segment = base 0x0, limit 0xfffff, type 0x1b
>                       = DPL 0, pres 1, def32 1, gran 1
> processor flags = interupt enabled, resume, IOPL = 0
> current process = 1 (swapper)
> trap number = 12
> panic: page fault
> cpuid = 0
> uptime: 42s
> All of this panic can be reproduced character for character (except the
> uptime, unless you try real hard) time and time again. Any pointers on what
> might be wrong here? Thanks in advance.

Taking a wild guess, but looks like the filesystem is screwed, possibly 
(current process: swapper) the node that defines the start of the swap 
partition. To rule out any filesystem issues, try booting from cd-rom.
If that works, mount ad1s1a from the rescue console (as /mnt for example).

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