On Thu, 2013-04-04 at 15:31 +0200, Daniel Vetter wrote: > We've discussed this approach of using (rt-prio, age) instead of just > age > to determine the the "oldness" of a task for deadlock-breaking with > -EAGAIN. The problem is that through PI boosting or normal rt-prio > changes > while tasks are trying to acquire ww_mutexes you can create acyclic > loops > in the blocked-on graph of ww_mutexes after the fact and so cause > deadlocks. So we've convinced ourselves that this approche doesn't > work. Could you pretty please draw me a picture, I'm having trouble seeing what you mean. AFAICT as long as you boost Y while its the lock owner things should work out, no? -- 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
