I don't know if this is any use to someone, but with a kernel built from
source supped Jan  6 17:03 GMT:

uvm_fault(0xf2e4535c, 0x7032d000, 0, 1) -> 1
kernel: page fault trap, code=0
Stopped in rc at        _dp8390_rint+0xc:   movl 0x100(%esi),%eax
db> t
_bp8390_rint(f032b400) at _dp8390_rint+0xc
_bp8390_intr(f032b400) at _dp8390_intr+0x1fe
--- interrupt ---
0x2acd3:
db> c

The continue then allowed everything to keep on going as if there had never
been a problem :) No reboot or anything.

Cheers,

Patrick