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SubjectRe: [patch] mm: memcontrol: remove stale page_cgroup_lock comment
On Sat 01-11-14 23:14:20, Johannes Weiner wrote:
> There is no cgroup-specific page lock anymore.
>
> Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>

Acked-by: Michal Hocko <mhocko@suse.cz>

> ---
> mm/memcontrol.c | 4 ----
> 1 file changed, 4 deletions(-)
>
> diff --git a/mm/memcontrol.c b/mm/memcontrol.c
> index 38f0647a2f12..d20928597a07 100644
> --- a/mm/memcontrol.c
> +++ b/mm/memcontrol.c
> @@ -2467,10 +2467,6 @@ static void commit_charge(struct page *page, struct mem_cgroup *memcg,
> int isolated;
>
> VM_BUG_ON_PAGE(pc->mem_cgroup, page);
> - /*
> - * we don't need page_cgroup_lock about tail pages, becase they are not
> - * accessed by any other context at this point.
> - */
>
> /*
> * In some cases, SwapCache and FUSE(splice_buf->radixtree), the page
> --
> 2.1.3
>

--
Michal Hocko
SUSE Labs


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