> I think Jeremy's question was due to trying to reduce the 32/64-bit 
quoted text
> differences.  Performance-wise, it might add a small amount to user 
> setup time (a typical 32-bit process will need all four, for the main 
> binary, libraries, stack and kernel, respectively) 

With the new top down mmap layout and standard 3:1 split it should typically 
only need two.

-Andi
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