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    SubjectRe: [PATCH -V9 11/15] hugetlb/cgroup: Add charge/uncharge routines for hugetlb cgroup
    On Thu, 14 Jun 2012 16:58:05 +0800
    Li Zefan <lizefan@huawei.com> wrote:

    > > +int hugetlb_cgroup_charge_cgroup(int idx, unsigned long nr_pages,
    >
    > > + struct hugetlb_cgroup **ptr)
    > > +{
    > > + int ret = 0;
    > > + struct res_counter *fail_res;
    > > + struct hugetlb_cgroup *h_cg = NULL;
    > > + unsigned long csize = nr_pages * PAGE_SIZE;
    > > +
    > > + if (hugetlb_cgroup_disabled())
    > > + goto done;
    > > + /*
    > > + * We don't charge any cgroup if the compound page have less
    > > + * than 3 pages.
    > > + */
    > > + if (huge_page_order(&hstates[idx]) < HUGETLB_CGROUP_MIN_ORDER)
    > > + goto done;
    > > +again:
    > > + rcu_read_lock();
    > > + h_cg = hugetlb_cgroup_from_task(current);
    > > + if (!h_cg)
    >
    >
    > In no circumstances should h_cg be NULL.
    >

    Aneesh?


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