Paul E. McKenney is a Distinguished Engineer with the IBM Linux Technology Center, where he maintains the RCU implementation within the Linux kernel. He has been coding for four decades, more than half of that on parallel hardware. His prior lives include the DYNIX/ptx kernel at Sequent, networking protocols at SRI International, and work as a self-employed contract programmer on soft-realtime projects. His hobbies include what passes for running at his age and the usual house-wife-kids habit.