@unpublished{PaulEMcKenney2008WhatIsRCUUsage ,Author="Paul E. McKenney" ,Title="What is {RCU}? Part 2: Usage" ,month="January" ,day="4" ,year="2008" ,note="Available: \url{http://lwn.net/Articles/263130/} [Viewed January 4, 2008]" ,annotation=" Lays out six uses of RCU: 1. RCU is a Reader-Writer Lock Replacement 2. RCU is a Restricted Reference-Counting Mechanism 3. RCU is a Bulk Reference-Counting Mechanism 4. RCU is a Poor Man's Garbage Collector 5. RCU is a Way of Providing Existence Guarantees 6. RCU is a Way of Waiting for Things to Finish " }