I've actually been seeing this for about 2 months now but only just
now got motivated enough to enable crashdumps and get some information
on what happens whenver I try to use the printer attached to my (sadly :)
-current SMP box:

IdlePTD 3682304
initial pcb at 2e70e0
panicstr: page fault
panic messages:
Fatal trap 12: page fault while in kernel mode
cpuid = 0; lapic.id = 00000000
fault virtual address   = 0xffff8640
fault code              = supervisor write, page not present
instruction pointer     = 0x8:0xc8dc8676
stack pointer           = 0x10:0xc8280f88
frame pointer           = 0x10:0xc8280f9c
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         = 12322 (irq7: lpt0)
trap number             = 12
panic: page fault
cpuid = 0; lapic.id = 00000000
boot() called on cpu#0

If anybody wants a fuller traceback then I'll compile up a kernel with
debugging symbols, but it's going to be pretty sparse anyway since it
basically only shows the trap() from the page fault and the subsequent

- Jordan

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