On Wed 13-06-12 15:57:30, Aneesh Kumar K.V wrote:
> From: "Aneesh Kumar K.V" <aneesh.kumar@xxxxxxxxxxxxxxxxxx>
>
> This patchset add the charge and uncharge routines for hugetlb cgroup.
> We do cgroup charging in page alloc and uncharge in compound page
> destructor. Assigning page's hugetlb cgroup is protected by hugetlb_lock.
>
> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@xxxxxxxxxxxxxxxxxx>
Reviewed-by: Michal Hocko <mhocko@xxxxxxx>
One minor comment
[...]
> +void hugetlb_cgroup_commit_charge(int idx, unsigned long nr_pages,
> + struct hugetlb_cgroup *h_cg,
> + struct page *page)
> +{
> + if (hugetlb_cgroup_disabled() || !h_cg)
> + return;
> +
> + spin_lock(&hugetlb_lock);
> + set_hugetlb_cgroup(page, h_cg);
> + spin_unlock(&hugetlb_lock);
> + return;
> +}
I guess we can remove the lock here because nobody can see the page yet,
right?
--
Michal Hocko
SUSE Labs
SUSE LINUX s.r.o.
Lihovarska 1060/12
190 00 Praha 9
Czech Republic
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