Messages in this thread | | | Date | Tue, 6 Sep 2022 08:30:41 -1000 | From | Tejun Heo <> | Subject | Re: BUG: HANG_DETECT waiting for migration_cpu_stop() complete |
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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@slm.duckdns.org/ 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
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