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