linux-kernel - Re: [PATCH v2] cgroup/cpuset: fix panic caused by partcmd

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Message-ID: <ZqlFRaDp3dPrCp2z@slm.duckdns.org>
Date: Tue, 30 Jul 2024 09:55:49 -1000
From: Tejun Heo <tj@...nel.org>
To: Chen Ridong <chenridong@...wei.com>
Cc: lizefan.x@...edance.com, hannes@...xchg.org, longman@...hat.com,
	adityakali@...gle.com, sergeh@...nel.org, bpf@...r.kernel.org,
	cgroups@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] cgroup/cpuset: fix panic caused by partcmd_update

On Tue, Jul 30, 2024 at 09:51:26AM +0000, Chen Ridong wrote:
...
> This issue is caused by the incorrect rebuilding of scheduling domains.
> In this scenario, test/cpuset.cpus.partition should be an invalid root
> and should not trigger the rebuilding of scheduling domains. When calling
> update_parent_effective_cpumask with partcmd_update, if newmask is not
> null, it should recheck newmask whether there are cpus is available
> for parect/cs that has tasks.
> 
> Fixes: 0c7f293efc87 ("cgroup/cpuset: Add cpuset.cpus.exclusive.effective for v2")
> Signed-off-by: Chen Ridong <chenridong@...wei.com>

Applied to cgroup/for-6.11-fixes w/ stable tag added.

Thanks.

-- 
tejun