> I don't agree that address space, per se, is a "real quantity." 
 > It certainly has no representation, for example, in the LDT.  In
 > effect, address space is a notification to the operating system
 > that memory may be committed.  As Peter has pointed out, even

Let me get this right, you are saying that there is an infinte amount of
address space? It is impossible to run out of adress space? If not, it is a
"real quantity". 

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