Re: Why preallocate pmd in x86 32-bit PAE?

[H. Peter Anvin]

Andi Kleen wrote:
> > I think Jeremy's question was due to trying to reduce the 32/64-bit 
> > 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.

Well, three with the kernel.

	-hpa
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