@unpublished{PaulEMcKenney2007PreemptibleRCU ,Author="Paul E. McKenney" ,Title="The design of preemptible read-copy-update" ,month="October" ,day="8" ,year="2007" ,note="Available: \url{http://lwn.net/Articles/253651/} [Viewed October 25, 2007]" ,annotation=" LWN article describing the design of preemptible RCU. " }