From: Tejun Heo <tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
To: Wei Yang <richard.weiyang-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Cc: lizefan.x-EC8Uxl6Npydl57MIdRCFDg@public.gmane.org,
hannes-druUgvl0LCNAfugRpC6u6w@public.gmane.org,
cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.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-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
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-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Applied to cgroup/for-5.17 w/ minor description adjustment.
Thanks.
--
tejun
next prev parent reply other threads:[~2021-11-29 17:39 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
[not found] ` <20211127145919.31159-2-richard.weiyang-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2021-11-29 17:39 ` Tejun Heo [this message]
[not found] ` <20211127145919.31159-1-richard.weiyang-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2021-11-29 17:35 ` [PATCH 1/2] cgroup: cgroup_subsys[ssid] is never NULL Tejun Heo
[not found] ` <YaUPej4QUZoFAuOM-NiLfg/pYEd1N0TnZuCh8vA@public.gmane.org>
2021-11-30 0:33 ` Wei Yang
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=YaUQZZbFDDOpwHYY@slm.duckdns.org \
--to=tj-dgejt+ai2ygdnm+yrofe0a@public.gmane.org \
--cc=cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
--cc=hannes-druUgvl0LCNAfugRpC6u6w@public.gmane.org \
--cc=linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
--cc=lizefan.x-EC8Uxl6Npydl57MIdRCFDg@public.gmane.org \
--cc=richard.weiyang-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox