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    SubjectRe: Why preallocate pmd in x86 32-bit PAE?
    Andi Kleen wrote:
    > On Friday 16 November 2007 16:45:16 H. Peter Anvin wrote:
    >> 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.
    > I didn't count kernel because it is always fixed anyways and about zero
    > overhead for the normal setup case.

    Of course, but it was in the original list so...

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      Last update: 2007-11-16 17:13    [W:0.027 / U:13.448 seconds]
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