linux-kernel - Re: [PATCH 2/4] mm/memcg: mem_cgroup_per_node is already set to 0 on allocation

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Message-ID: <YeFZrEAaPw1Y5wwd@kernel.org>
Date:   Fri, 14 Jan 2022 13:08:28 +0200
From:   Mike Rapoport <rppt@...nel.org>
To:     Wei Yang <richard.weiyang@...il.com>
Cc:     hannes@...xchg.org, mhocko@...nel.org, vdavydov.dev@...il.com,
        akpm@...ux-foundation.org, shakeelb@...gle.com, guro@...com,
        vbabka@...e.cz, willy@...radead.org, songmuchun@...edance.com,
        shy828301@...il.com, surenb@...gle.com,
        linux-kernel@...r.kernel.org, cgroups@...r.kernel.org,
        linux-mm@...ck.org
Subject: Re: [PATCH 2/4] mm/memcg: mem_cgroup_per_node is already set to 0 on
 allocation

On Tue, Jan 11, 2022 at 01:03:00AM +0000, Wei Yang wrote:
> kzalloc_node() would set data to 0, so it's not necessary to set it
> again.
> 
> Signed-off-by: Wei Yang <richard.weiyang@...il.com>

Reviewed-by: Mike Rapoport <rppt@...ux.ibm.com>

> ---
>  mm/memcontrol.c | 2 --
>  1 file changed, 2 deletions(-)
> 
> diff --git a/mm/memcontrol.c b/mm/memcontrol.c
> index 11715f7323c0..a504616f904a 100644
> --- a/mm/memcontrol.c
> +++ b/mm/memcontrol.c
> @@ -5067,8 +5067,6 @@ static int alloc_mem_cgroup_per_node_info(struct mem_cgroup *memcg, int node)
>  	}
>  
>  	lruvec_init(&pn->lruvec);
> -	pn->usage_in_excess = 0;
> -	pn->on_tree = false;
>  	pn->memcg = memcg;
>  
>  	memcg->nodeinfo[node] = pn;
> -- 
> 2.33.1
> 
> 

-- 
Sincerely yours,
Mike.