On Mon, Jul 06, 2020 at 09:26:33AM -0700, Paul E. McKenney wrote: > And perhaps more constructively, we do need to prioritize address and data > dependencies over control dependencies. For one thing, there are a lot > more address/data dependencies in existing code than there are control > dependencies, and (sadly, perhaps more importantly) there are a lot more > people who are convinced that address/data dependencies are important. If they do not consider their Linux OS running correctly :-) > For another (admittedly more theoretical) thing, the OOTA scenarios > stemming from control dependencies are a lot less annoying than those > from address/data dependencies. > > And address/data dependencies are as far as I know vulnerable to things > like conditional-move instructions that can cause problems for control > dependencies. > > Nevertheless, yes, control dependencies also need attention. Today I added one more \o/
