On Fri, Jun 14, 2013 at 3:31 PM, Davidlohr Bueso <davidlohr.bueso@xxxxxx> wrote: > A few ideas that come to mind are avoiding taking the ->wait_lock and > avoid dealing with waiters when doing the optimistic spinning (just like > mutexes do). > > I agree that we should first deal with the optimistic spinning before > adding the MCS complexity. Maybe it would be worth disabling the MCS patch in mutex and comparing that to the rwsem patches ? Just to make sure the rwsem performance delta isn't related to that. -- Michel "Walken" Lespinasse A program is never fully debugged until the last user dies. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>