> > Here is a sample stack trace. I repeated the panic several times, the
> > addresses varied, but it always looked the same:
> > pmap_zero_page(4910000,fe012f5c,f01b7774,f0391740,fdfdd24d4) + 0x1e
> > uvm_pagezero(f0391740) + 0x12
> > uvm_fault(fdfd24d4,68000,0,3,0) + 0xe24
> > trap() +0x437
> > trap (number 6)
> 
> I'd have thought there would be two instances of pmap_zero_page()
> in the stack trace.  weird.

Perhaps the debugger may had difficulty tracing through the trap
frame...  (gdb seems to have this difficulty on i386.. tracebacks stop
at the trap frame.  i haven't looked into fixing this).