linux-kernel - Re: [PATCH v2 2/2] vmscan,cgroup: apply mems

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Message-ID: <aAMTLKolO0GWCoMN@slm.duckdns.org>
Date: Fri, 18 Apr 2025 17:06:20 -1000
From: Tejun Heo <tj@...nel.org>
To: Gregory Price <gourry@...rry.net>
Cc: cgroups@...r.kernel.org, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, kernel-team@...a.com,
	hannes@...xchg.org, mkoutny@...e.com, longman@...hat.com,
	mhocko@...nel.org, roman.gushchin@...ux.dev, shakeel.butt@...ux.dev,
	muchun.song@...ux.dev, akpm@...ux-foundation.org
Subject: Re: [PATCH v2 2/2] vmscan,cgroup: apply mems_effective to reclaim

Hello,

On Thu, Apr 17, 2025 at 11:13:52PM -0400, Gregory Price wrote:
...
> +static inline bool mem_cgroup_node_allowed(struct mem_cgroup *memcg, int nid)
> +{
> +	return memcg ? cgroup_node_allowed(memcg->css.cgroup, nid) : true;
> +}
> +
...
> +bool cgroup_node_allowed(struct cgroup *cgroup, int nid)
> +{
> +	return cpuset_node_allowed(cgroup, nid);
> +}
...
> +bool cpuset_node_allowed(struct cgroup *cgroup, int nid)
> +{

What does the indirection through cgroup_node_allowed() add? Why not just
call cpuset directly?

Thanks.

-- 
tejun