build instructions for userspace-rcu library : make pthreads-x86 or make pthreads-ppc make make install Usage : Registration of _each thread_ calling read-side critical sections must be done with rcu_register_thread() before using rcu_read_lock()/rcu_read_unlock(). Unregistration should be performed with rcu_unregister_thread() before exiting the thread. Mathieu Desnoyers