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    SubjectRe: [RFC PATCH 0/3] Reduce searching in the page allocator fast-path
    On Tue, Aug 18, 2009 at 10:22:01AM -0400, Christoph Lameter wrote:
    > This could be combined with the per cpu ops patch that makes the page
    > allocator use alloc_percpu for its per cpu data needs. That in turn would
    > allow the use of per cpu atomics in the hot paths, maybe we can
    > get to a point where we can drop the irq disable there.

    It would appear that getting rid of IRQ disabling and using per-cpu-atomics
    would be a problem independent of searching the free lists. Either would
    be good, both would be better or am I missing something that makes them
    mutually exclusive?

    Can you point me to which patchset you are talking about specifically that
    uses per-cpu atomics in the hot path? There are a lot of per-cpu patches
    related to you that have been posted in the last few months and I'm not sure
    what any of their merge status' is.

    Mel Gorman
    Part-time Phd Student Linux Technology Center
    University of Limerick IBM Dublin Software Lab

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