On Wed, 2010-06-09 at 14:16 +0200, Florian Mickler wrote: > That was also my first idea, but then I thought about qos and thought > atomic notification are necessary. > Do you see any value in having atomic notification? > > I have the following situation before my eyes: > > Driver A gets an interrupt and needs (to service that > interrupt) the cpu to guarantee a latency of X because the > device is a bit icky. > > Now, in that situation, if we don't immediately (without scheduling in > between) notify the system to be in that latency-mode the driver won't > function properly. Is this a realistic scene? > > At the moment we only have process context notification and only 2 > listeners. > > I think providing for atomic as well as "relaxed" notification could be > useful. > > If atomic notification is deemed unnecessary, I have no > problems to just use schedule_work() in update request. > Anyway, it is probably best to split this. I.e. first make > update_request callable from atomic contexts with doing the > schedule_work in update_request and then > as an add on provide for constraints_objects with atomic notifications. Well I remember http://thread.gmane.org/gmane.linux.kernel/979935 where Mark renamed things to "request" which seems to imply to me more of a "please do this" than "I NEED IT NOW!!!!!". johannes _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
