> NetBSD can use vnd's for file swapping, and I've yet to see a system, Unix
> or otherwise, that can switch of swap once it has been allocated as such.
> 
	SVR4 can do this, comes in handy. When you see a piggy program about to
	run out of resources you suspend it, create another paging file,
	add the file to paging, resume the program and when it ends, delete
	the paging file. The OS migrates all the pages to other paging
	areas and then releases the file in question. VERY handy!

		-Rob