On 2018-11-01 16:18:04 [-0700], Paul E. McKenney wrote: > The need for this goes away as of the current merge window because > RCU-bh has gone away. (Aside from still being able to do things > like rcu_read_lock_bh() as a documentation device.) So in -RT rcu_read_lock_bh() does { local_bh_disable() ; rcu_read_lock() } So you are saying that this is also the case in v4.20? > Thanx, Paul > Sebastian