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    SubjectRe: [PATCH -V8 15/16] hugetlb/cgroup: migrate hugetlb cgroup info from oldpage to new page during migration
    Michal Hocko <> writes:

    > On Sat 09-06-12 14:30:00, Aneesh Kumar K.V wrote:
    >> From: "Aneesh Kumar K.V" <>
    >> With HugeTLB pages, hugetlb cgroup is uncharged in compound page
    >> destructor. Since we are holding a hugepage reference,
    > Who is holding that reference? I do not see anybody calling get_page in
    > this patch...

    soft_offline_huge_page takes the reference. It does the final
    put_page(hpage) there.

    >> we can be sure that old page won't get uncharged till the last
    >> put_page().


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