On Fri, 2011-05-13 at 16:57 +0200, Ingo Molnar wrote: > this is a security mechanism Who says? and why would you want to unify two separate concepts only to them limit it to security that just doesn't make sense. Either you provide a full on replacement for notifier chain like things or you don't, only extending trace events in this fashion for security is like way weird. Plus see the arguments Eric made about stacking stuff, not only security schemes will have those problems.