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    SubjectRe: [PATCH 5/12] memcg make page_cgroup->flags atomic
    KAMEZAWA Hiroyuki wrote:
    > This patch makes page_cgroup->flags to be atomic_ops and define
    > functions (and macros) to access it.
    >
    > This patch itself makes memcg slow but this patch's final purpose is
    > to remove lock_page_cgroup() and allowing fast access to page_cgroup.
    > (And total performance will increase after all patches applied.)
    >

    Looks good to me

    Acked-by: Balbir Singh <balbir@linux.vnet.ibm.com>
    provided we push in the lockless ones too :)

    --
    Balbir


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