Julian Assange <proff@iq.org> writes:

> Have you thought about explicity including support for reference
> counding into pool(9)?

I asked about this a while back, but never received an answer.  My
idea at the time was to support paging: add an overall per-slab
reference count (but the user doesn't know that it's applied to a slab
rather than a particular object), and when it drops to 0 the slab is
marked pageable.