meaning of 'no change limits'

[Jonathan Smith]

I suppose this a public operation versus private operation
question, but in practice, given the two alternatives:
	1. emit "no change limit", reduce space allocation, use less space
	2. emit nothing, use less space
my inclination would be the former; it seems that the latter can always
be done, but the former, which would allow (possibly) better dynamic
storage aloocation/management, would be impossible. Your covert
channel argument is real, but consider that if you make the unit of
decrease a page (for example), that you can provide a monotonically
decreasing area of working space to yourself,  which bounds the duration
and information content of the bitstring.

								-J