Re: BUG: HANG_DETECT waiting for migration_cpu_stop() complete
From: Tejun Heo <tj@kernel.org>
Date: 2022-09-06 18:30:48
Also in:
cgroups, linux-mediatek, lkml
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/ (local) 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 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel