I have patches to add locking to dpt(4) and make it MPSAFE (along with some other fixes). I would appreciate any testing folks are able to do. The patches are against HEAD but should apply to 8 or 9. Please ensure you have INVARIANTS and INVARIANT_SUPPORT enabled for any initial testing that you do. Thanks! http://www.FreeBSD.org/~jhb/patches/dpt_locking.patch -- John Baldwin