> I've got a rather nasty, totally reproducible problem with some stacked
> file systems.  (This is on port-mac68k, in case it matters.)
> 
> 	/usr/src		 is mounted via nfs
> 	/usr/src/sys/arch/mac68k is nullfs mounted as /home/paul/original
> 	/home/paul/changes	 is unionfs mounted below /usr/.../mac68k


Just to save us some time trying to figure out what you meant by this,
can you be brutally specific about what you're doing here (exact fstab
entries and/or "mount" commands, please?)

Thanks.

					- Bill