disklabel -r -W md0s0 enters into debugger

["km b" <kmb810@xxxxxxxxx>]

Hello All,

I synced with the lattest head an hour ago and ran into the following problem:
Trying to configure memory disk and disklabel -r -W md0s0  enters into debugger.

mdstrategy_malloc+0x11a : page fault while in kernel mode.

So I took  a crash dump and nailed down the problem to the following point.