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    SubjectRe: [PATCH 4/5] mm: Only IPI CPUs to drain local pages if they exist
    On Mon, 26 Sep 2011, Gilad Ben-Yossef wrote:

    > I do not know if these scenarios warrant the additional overhead,
    > certainly not in all situations. Maybe the right thing is to make it a
    > config option dependent. As I stated in the patch description, that is
    > one of the thing I'm interested in feedback on.

    The flushing of the per cpu pages only done when kmem_cache_shrink() is
    run or when a slab cache is closed. And for diagnostics. So its rare and
    not performance critical.




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