On Thu, 2013-04-04 at 15:31 +0200, Daniel Vetter wrote: > Hm, I guess your aim with the TASK_DEADLOCK wakeup is to bound the > wait > times of older task. No, imagine the following: struct ww_mutex A, B; struct mutex C; task-O task-Y task-X A B C C B At this point O finds that Y owns B and thus we want to make Y 'yield' B to make allow B progress. Since Y is blocked, we'll send a wakeup. However Y is blocked on a different locking primitive; one that doesn't collaborate in the -EDEADLK scheme therefore we don't want the wakeup to succeed. -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
