* Oleg Nesterov <[email protected]> wrote:
> Currently it is allowed that work->func() does flush_workqueue() on
> its own workqueue. So we have
>
> run_workqueue()
> work->func()
> flush_workqueue()
> run_workqueue()
>
> All but work->func() take wq->lockdep_map, I guess check_deadlock()
> won't be happy.
yep.
> OTOH. Perhaps we can can forbid such a behaviour? Andrew, do you know
> any good example of "keventd trying to flush its own queue" ?
i'd prefer to make the API a little bit stricter: such recursion is
nasty. Btw., what mechanism prevents the second instance of
run_workqueue() calling into a work->func() again?
Ingo
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