Hi, I'd like to commit this to -10. It migrates the if_lagg locking from a rw lock to a rm lock. We see a bit of contention between the transmit and receive sides of lagg during traffic loads (10+ gigabit per second.) Using rmlocks eliminate this. http://people.freebsd.org/~adrian/netflix/20130819-lagg-rmlock-1.diff Thanks, -adrian