kernel panic

I'm getting kernel panics every now and them from kernel sources
cvsup'd a few hours ago.  Same configured kernel from Friday is
OK.

Typed by hand:

  Fatal trap 12: page fault while in kernel mode
  fault virtual address       = 0xd0d10080
  fault code                  = supervisor read, page not present
  instruction pointer         = 0x8:0xc03adceb
  stack pointer               = 0x10:0xd1353bb0
  frame pointer               = 0x10:0xd1353bbc
  code segment                = base 0x0, limit 0xfffff, type 0x1b
  processor eflags            = interrupt enabled, resume, IOPL = 0
  current process             = 607 (bash)
  kernel: type 12 trap, code = 0
  Stopped at pmap_allocpte+0x13:movl 0(%eax, %esi, 4), %edx
  db> trace
  pmap_allocpte(c1e594b0, 8141000, 0, c037b961m c1e59400) at pmap_allocpte+0x13
  pmap_enter(c1e54b0, 8141000, c0ad7ac0, 3, 0)at pmap_enter+0x39
  vm_fault(c1e59400, 8141000, 2, 8, c1e2fbe0) at vm_fault+0xec7
  trap_pfault(d1353d48, 1, 8141b7c, 8141b7c, 6) at trap_pfault+0xcc
  trap(2f, 2f, 2f, bfbffbf0, bfbffc00) at trap+0x213
  calltrap() at calltrap+0x5
  --- trap 0xc, eip=0x80480d5, esp = 0xbfbffbd0, ebp = 0xbfbffbe8 ---

-- 
Dan Eischen