linux-kernel - Re: [PATCH -next] cgroup: Fix AA deadlock caused by cgroup_bpf

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Message-ID: <f8dfa410-bce0-48fe-b3d1-19fb5f5768a8@web.de>
Date: Mon, 10 Jun 2024 14:28:07 +0200
From: Markus Elfring <Markus.Elfring@....de>
To: Chen Ridong <chenridong@...wei.com>, bpf@...r.kernel.org,
 cgroups@...r.kernel.org, Andrii Nakryiko <andrii@...nel.org>,
 Alexei Starovoitov <ast@...nel.org>, Daniel Borkmann <daniel@...earbox.net>,
 Eduard Zingerman <eddyz87@...il.com>, Hao Luo <haoluo@...gle.com>,
 Jiri Olsa <jolsa@...nel.org>, Johannes Weiner <hannes@...xchg.org>,
 John Fastabend <john.fastabend@...il.com>, KP Singh <kpsingh@...nel.org>,
 Martin KaFai Lau <martin.lau@...ux.dev>,
 Roman Gushchin <roman.gushchin@...ux.dev>, Song Liu <song@...nel.org>,
 Stanislav Fomichev <sdf@...gle.com>, Tejun Heo <tj@...nel.org>,
 Yonghong Song <yonghong.song@...ux.dev>, Zefan Li <lizefan.x@...edance.com>
Cc: LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH -next] cgroup: Fix AA deadlock caused by
 cgroup_bpf_release

> We found an AA deadlock problem as shown belowed:

                                           below?

* How was an “AA deadlock” problem detected?

* Were any special analysis tools involved?


…
> preblem is solved.

  problem?


Regards,
Markus