On Sat, 6 Mar 2004, Forrest W. Christian wrote:
> I recently swapped out a motherboard in a FreeBSD server for a new Intel
> Pentium 4 motherboard/processor to gain speed.
>
> Since that time, this machine has been randomly panicing such as:
>
> Fatal trap 12: page fault while in kernel mode
> mp_lock = 00000003; cpuid = 0; lapic.id = 00000000
> fault virtual address = 0x36
null pointer offset deref.
> fault code = supervisor write, page not present
> instruction pointer = 0x8:0xc01f60fe
> stack pointer = 0x10:0xf25cdab8
> frame pointer = 0x10:0xf25cdb58
> code segment = base 0x0, limit 0xfffff, type 0x1b
> = DPL 0, pres 1, def32 1, gran 1
> processor eflags = interrupt enabled, resume, IOPL = 0
> current process = 454 (perl)
> interrupt mask = net bio cam <- SMP: XXX
> trap number = 12
> panic: page fault
> mp_lock = 00000003; cpuid = 0; lapic.id = 00000000
> boot() called on cpu#0
>
> >From my symbol table, this particular panic appears to have occured in
> vm_fault:
>
> c01f5fcc T vm_fault
> c01f6b1c T vm_fault_wire
thats not too unsuprising. Can you follow the instructions in the handbook
to get a crashdump and use gdb to get a backtrace?
>
> This appears to be pretty consistent (the instruction pointer). It used
> to panic both where I mentioned above and also in pmap.c. Since I did the
> last cvsup and kernel rebuild, I haven't seen one from the pmap area.
>
> Any ideas?
>
> - Forrest W. Christian (forrestc@imach.com) AC7DE
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--
Doug White | FreeBSD: The Power to Serve
dwhite@gumbysoft.com | www.FreeBSD.org