From: Tejun Heo <tj@kernel.org>
To: Guopeng Zhang <guopeng.zhang@linux.dev>
Cc: longman@redhat.com, ridong.chen@linux.dev,
cgroups@vger.kernel.org, hannes@cmpxchg.org, mkoutny@suse.com,
linux-kernel@vger.kernel.org, zhangguopeng@kylinos.cn
Subject: Re: [PATCH] cgroup/cpuset: Use WRITE_ONCE() for shared prs_err updates
Date: Mon, 10 Aug 2026 09:35:50 -1000 [thread overview]
Message-ID: <11d2ce0cafd19dda67513986d8b5fd48@kernel.org> (raw)
In-Reply-To: <20260810095559.77345-1-guopeng.zhang@linux.dev>
On Mon, Aug 10, 2026 at 05:55:59PM +0800, Guopeng Zhang wrote:
> From: Guopeng Zhang <zhangguopeng@kylinos.cn>
>
> cpuset_partition_show() reads cs->prs_err without cpuset_mutex using
> READ_ONCE(). The field is documented as not lock protected, but several
> updates to live cpusets still use plain stores.
>
> Convert the remaining prs_err stores on live cpusets to WRITE_ONCE().
Applied to cgroup/for-7.3.
Thanks.
--
tejun
prev parent reply other threads:[~2026-08-10 19:35 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-10 9:55 [PATCH] cgroup/cpuset: Use WRITE_ONCE() for shared prs_err updates Guopeng Zhang
2026-08-10 15:22 ` Waiman Long
2026-08-10 19:35 ` Tejun Heo [this message]
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=11d2ce0cafd19dda67513986d8b5fd48@kernel.org \
--to=tj@kernel.org \
--cc=cgroups@vger.kernel.org \
--cc=guopeng.zhang@linux.dev \
--cc=hannes@cmpxchg.org \
--cc=linux-kernel@vger.kernel.org \
--cc=longman@redhat.com \
--cc=mkoutny@suse.com \
--cc=ridong.chen@linux.dev \
--cc=zhangguopeng@kylinos.cn \
/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