linux-kernel - Re: [patch 1/3] mm: memcontrol: remove unnecessary soft limit tree node test

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Message-ID: <20150113145053.GG25318@dhcp22.suse.cz>
Date:	Tue, 13 Jan 2015 15:50:53 +0100
From:	Michal Hocko <mhocko@...e.cz>
To:	Johannes Weiner <hannes@...xchg.org>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Vladimir Davydov <vdavydov@...allels.com>, linux-mm@...ck.org,
	cgroups@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [patch 1/3] mm: memcontrol: remove unnecessary soft limit tree
 node test

On Fri 09-01-15 21:13:59, Johannes Weiner wrote:
> kzalloc_node() automatically falls back to nodes with suitable memory.
> 
> Signed-off-by: Johannes Weiner <hannes@...xchg.org>

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

> ---
>  mm/memcontrol.c | 7 ++-----
>  1 file changed, 2 insertions(+), 5 deletions(-)
> 
> diff --git a/mm/memcontrol.c b/mm/memcontrol.c
> index fd9e542fc26f..aad254b30708 100644
> --- a/mm/memcontrol.c
> +++ b/mm/memcontrol.c
> @@ -4520,13 +4520,10 @@ static void __init mem_cgroup_soft_limit_tree_init(void)
>  {
>  	struct mem_cgroup_tree_per_node *rtpn;
>  	struct mem_cgroup_tree_per_zone *rtpz;
> -	int tmp, node, zone;
> +	int node, zone;
>  
>  	for_each_node(node) {
> -		tmp = node;
> -		if (!node_state(node, N_NORMAL_MEMORY))
> -			tmp = -1;
> -		rtpn = kzalloc_node(sizeof(*rtpn), GFP_KERNEL, tmp);
> +		rtpn = kzalloc_node(sizeof(*rtpn), GFP_KERNEL, node);
>  		BUG_ON(!rtpn);
>  
>  		soft_limit_tree.rb_tree_per_node[node] = rtpn;
> -- 
> 2.2.0
> 

-- 
Michal Hocko
SUSE Labs
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