Should Keykos have an operation on a domain that emasculates it to avoid the cost of creating a new domain? Perhaps a factory could recycle a domain that it recognizes so as to avoid some of the creation cost. There is a valid security principle of cleaning after use, at least before reallocating some limited resource to a new situation. We clean page both disk page frames and core page frames before reallocation thru various kernel hacks. The current system never reallocates domains; it merely tears them down only to reconstitute them from scratch (buying pages and nodes again).

There are these variations on the proposal: