Re: [syzbot] possible deadlock in worker_thread

Bart Van Assche
2022-02-13T23:14:22Z

On 2/12/22 09:14, Tetsuo Handa wrote:
> How can reviewing all flush_workqueue(system_long_wq) calls help?

It is allowed to queue blocking actions on system_long_wq.
flush_workqueue(system_long_wq) can make a lower layer (e.g. ib_srp)
wait on a blocking action from a higher layer (e.g. the loop driver) and
thereby cause a deadlock. Hence my proposal to review all
flush_workqueue(system_long_wq) calls.

Thanks,

Bart.