From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To: Tejun Heo <tj@kernel.org>
Cc: "Martin Pitt" <martin@piware.de>,
regressions@lists.linux.dev, cgroups@vger.kernel.org,
"Johannes Weiner" <hannes@cmpxchg.org>,
"Michal Koutný" <mkoutny@suse.com>,
"David Vernet" <void@manifault.com>,
"Andrea Righi" <arighi@nvidia.com>,
"Changwoo Min" <changwoo@igalia.com>,
"Emil Tsalapatis" <emil@etsalapatis.com>,
sched-ext@lists.linux.dev, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2 cgroup/for-7.1-fixes sched_ext/for-7.1-fixes] cgroup: Defer css percpu_ref kill on rmdir until cgroup is depopulated
Date: Mon, 4 May 2026 09:28:46 +0200 [thread overview]
Message-ID: <20260504072846.qM4LxsIF@linutronix.de> (raw)
In-Reply-To: <ad3b4597f3df81914b871618535370db@kernel.org>
On 2026-05-01 08:31:22 [-1000], Tejun Heo wrote:
> A chain of commits going back to v7.0 reworked rmdir to satisfy the
> controller invariant that a subsystem's ->css_offline() must not run while
> tasks are still doing kernel-side work in the cgroup.
…
>
> Fixes: 1b164b876c36 ("cgroup: Wait for dying tasks to leave on rmdir")
> Cc: stable@vger.kernel.org # v7.0+
> Reported-by: Martin Pitt <martin@piware.de>
> Link: https://lore.kernel.org/all/afHNg2VX2jy9bW7y@piware.de/
> Link: https://lore.kernel.org/all/35e0670adb4abeab13da2c321582af9f@kernel.org/
> Signed-off-by: Tejun Heo <tj@kernel.org>
> Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
I gave it a quick spin, everything looks fine.
Acked-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Sebastian
next prev parent reply other threads:[~2026-05-04 7:28 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-01 18:31 [PATCH v2 cgroup/for-7.1-fixes sched_ext/for-7.1-fixes] cgroup: Defer css percpu_ref kill on rmdir until cgroup is depopulated Tejun Heo
2026-05-03 13:53 ` Martin Pitt
2026-05-04 7:28 ` Sebastian Andrzej Siewior [this message]
2026-05-04 18:54 ` Tejun Heo
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