linux-kernel - Re: [PATCH] mm/memcontrol: replace '== root_mem_cgroup' with mem_cgroup_is

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Message-ID: <20201104224622.GE1938922@carbon.dhcp.thefacebook.com>
Date:   Wed, 4 Nov 2020 14:46:22 -0800
From:   Roman Gushchin <guro@...com>
To:     Hui Su <sh_def@....com>
CC:     <hannes@...xchg.org>, <mhocko@...nel.org>,
        <vdavydov.dev@...il.com>, <akpm@...ux-foundation.org>,
        <cgroups@...r.kernel.org>, <linux-mm@...ck.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] mm/memcontrol: replace '== root_mem_cgroup' with
 mem_cgroup_is_root

On Wed, Nov 04, 2020 at 11:14:57PM +0800, Hui Su wrote:
> We have supplied the inline func: mem_cgroup_is_root().
> So we may use mem_cgroup_is_root() instead of using
> 'memcg == root_mem_cgroup' or 'memcg != root_mem_cgroup'
> directly, which is more readable.

Most of these comparisons will go away soon:
https://lkml.org/lkml/2020/10/21/612 (this is
an rfc version, I'll send an updated version soon).

Thanks!