On Sun, Feb 13, 2022 at 02:14:09AM +0900, Tetsuo Handa wrote: > On 2022/02/13 1:37, Bart Van Assche wrote: > > On 2/11/22 21:31, Tetsuo Handa wrote: > >> But this report might be suggesting us that we should consider > >> deprecating (and eventually getting rid of) system-wide workqueues > >> (declared in include/linux/workqueue.h), for since flush_workqueue() > >> synchronously waits for completion, sharing system-wide workqueues > >> among multiple modules can generate unexpected locking dependency > >> chain (like this report). > > > > I do not agree with deprecating system-wide workqueues. I think that > > all flush_workqueue(system_long_wq) calls should be reviewed since > > these are deadlock-prone. > > > > Thanks, > > > > Bart. > I second to Bart's request to do not deprecate system-wide workqueues. Thanks >
