On Sun, Nov 11, 2018 at 11:43:52AM -0800, Paul E. McKenney wrote: > Now that synchronize_rcu() waits for preempt-disable regions of code > as well as RCU read-side critical sections, synchronize_sched() can be > replaced by synchronize_rcu(). This commit therefore makes this change.
Yes, but it also waits for an actual RCU quiestent state, which makes synchoinize_rcu() potentially much more expensive than an actual synchronize_sched(). So why are we doing this?
