On Tue, Nov 06, 2018 at 12:34:11PM -0800, Daniel Jordan wrote: > > What isn't clear is if this calling thread is waiting or not. Only do > > this inheritance trick if it is actually waiting on the work. If it is > > not, nobody cares. > > The calling thread waits. Even if it didn't though, the inheritance trick > would still be desirable for timely completion of the job. Can you make lockdep aware that this is synchronous? ie if I do mutex_lock() ktask_run() mutex_lock() Can lockdep know that all the workers are running under that lock? I'm thinking particularly about rtnl_lock as a possible case, but there could also make some sense to hold the read side of the mm_sem or similar like the above. Jason
