From: Tejun Heo <tj@kernel.org>
To: Wei Yang <richard.weiyang@gmail.com>
Cc: lizefan.x@bytedance.com, hannes@cmpxchg.org,
cgroups@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 2/2] cgroup: get the wrong css for css_alloc() during cgroup_init_subsys()
Date: Mon, 29 Nov 2021 07:39:49 -1000 [thread overview]
Message-ID: <YaUQZZbFDDOpwHYY@slm.duckdns.org> (raw)
In-Reply-To: <20211127145919.31159-2-richard.weiyang@gmail.com>
On Sat, Nov 27, 2021 at 02:59:19PM +0000, Wei Yang wrote:
> css_alloc() needs the parent css, while cgroup_css() gets current
> cgropu's css. So we are getting the wrong css during
> cgroup_init_subsys().
>
> Fortunately, cgrp_dfl_root.cgrp's css is not set yet, so the value we
> pass to css_alloc() doesn't harm to the system.
>
> Let's pass NULL directly during init, since we know there is no parent
> yet.
>
> Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
Applied to cgroup/for-5.17 w/ minor description adjustment.
Thanks.
--
tejun
next prev parent reply other threads:[~2021-11-29 23:04 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-27 14:59 [PATCH 1/2] cgroup: cgroup_subsys[ssid] is never NULL Wei Yang
2021-11-27 14:59 ` [PATCH 2/2] cgroup: get the wrong css for css_alloc() during cgroup_init_subsys() Wei Yang
2021-11-29 17:39 ` Tejun Heo [this message]
2021-11-29 17:35 ` [PATCH 1/2] cgroup: cgroup_subsys[ssid] is never NULL Tejun Heo
2021-11-30 0:33 ` Wei Yang
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