Hello, (cc'ing Waiman in case he has a better idea) On Mon, Sep 05, 2022 at 04:22:29PM +0800, Jing-Ting Wu wrote: > https://lore.kernel.org/lkml/YvrWaml3F+x9Dk+T@xxxxxxxxxxxxxxx/ is for > fix cgroup_threadgroup_rwsem <-> cpus_read_lock() deadlock. > But this issue is cgroup_threadgroup_rwsem <-> cpuset_rwsem deadlock. If I'm understanding what you're writing correctly, this isn't a deadlock. The cpuset_hotplug_workfn simply isn't being woken up while holding cpuset_rwsem and others are just waiting for that lock to be released. Thanks. -- tejun
