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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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