Re: [PATCH 1/4] mm, memcontrol: avoid duplicated memcg enable check
From: Barry Song
Date: Mon Dec 02 2024 - 19:24:30 EST
On Tue, Dec 3, 2024 at 7:42 AM Kairui Song <ryncsn@xxxxxxxxx> wrote:
>
> From: Kairui Song <kasong@xxxxxxxxxxx>
>
> mem_cgroup_uncharge_swap() implies a mem_cgroup_disabled() check,
> which is already checked by the caller here. Skip it by calling
> __mem_cgroup_uncharge_swap() directly.
>
> Signed-off-by: Kairui Song <kasong@xxxxxxxxxxx>
Reviewed-by: Barry Song <baohua@xxxxxxxxxx>
> ---
> mm/memcontrol.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/mm/memcontrol.c b/mm/memcontrol.c
> index 7b3503d12aaf..d3d1eb506eee 100644
> --- a/mm/memcontrol.c
> +++ b/mm/memcontrol.c
> @@ -4615,7 +4615,7 @@ void mem_cgroup_swapin_uncharge_swap(swp_entry_t entry, unsigned int nr_pages)
> * let's not wait for it. The page already received a
> * memory+swap charge, drop the swap entry duplicate.
> */
> - mem_cgroup_uncharge_swap(entry, nr_pages);
> + __mem_cgroup_uncharge_swap(entry, nr_pages);
> }
> }
>
> --
> 2.47.0
>