From: "Michal Koutný" <mkoutny@suse.com>
To: Tejun Heo <tj@kernel.org>,
cgroups@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: Dan Schatzberg <dschatzberg@meta.com>,
Peter Zijlstra <peterz@infradead.org>,
stable@vger.kernel.org, Noah Elias Feldt <N.Feldt@mittwald.de>,
Salvatore Bonaccorso <carnil@debian.org>,
Johannes Weiner <hannes@cmpxchg.org>
Subject: Re: [PATCH v2] cgroup: Avoid iteration of dying tasks with zero refcount
Date: Mon, 7 Sep 2026 19:07:07 +0200 [thread overview]
Message-ID: <ap7u0VaI7JVAIq7K@localhost.localdomain> (raw)
In-Reply-To: <20260907170345.45316-1-mkoutny@suse.com>
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On Mon, Sep 07, 2026 at 07:03:44PM +0200, Michal Koutný <mkoutny@suse.com> wrote:
> cgroup_task_release() is not synced via css_set_lock hence the race
> possibility. (I'm not 100% convinced about this LLM-assisted
> interleaving, multiple css_task_iter_next() calls may be involved with
> css_set_lock released.)
This paragraph should be editted out too because of
> Changes from v1 (https://lore.kernel.org/r/20260902161653.1051794-1-mkoutny@suse.com)
> - add css_set_lock release to sequence diagram
(Sorry for multi-messaging.)
Michal
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next prev parent reply other threads:[~2026-09-07 17:07 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-07 17:03 [PATCH v2] cgroup: Avoid iteration of dying tasks with zero refcount Michal Koutný
2026-09-07 17:07 ` Michal Koutný [this message]
-- strict thread matches above, loose matches on Subject: below --
2026-09-07 19:27 Noah Feldt
2026-09-08 15:55 ` Michal Koutný
2026-09-11 16:11 ` Michal Koutný
2026-09-11 16:57 ` Tejun Heo
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