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    SubjectRe: [patch 15/26] Xen-paravirt_ops: Add apply_to_page_range() which applies a function to a pte range.

    * Jeremy Fitzhardinge <jeremy@goop.org> wrote:

    > Add a new mm function apply_to_page_range() which applies a given
    > function to every pte in a given virtual address range in a given mm
    > structure. This is a generic alternative to cut-and-pasting the Linux
    > idiomatic pagetable walking code in every place that a sequence of
    > PTEs must be accessed.

    nice one! I suspect we could simplify some of the less
    performance-critical open-coded pagetable walker loops in the kernel
    with this? (i'm not even sure it's all that much of a performance loss
    to pass a function pointer around - would be nice to convert say
    mprotect() to this and see the performance difference?)

    Acked-by: Ingo Molnar <mingo@elte.hu>

    Ingo
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