Michal Hocko [off-list ref] writes:

On Sat 09-06-12 14:30:00, Aneesh Kumar K.V wrote:

quoted

From: "Aneesh Kumar K.V" <redacted>

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.

quoted

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

-aneesh

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