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Meta
Monthly Archives: July 2010
Stupid RCU Tricks: Holding Off RCU Read-Side Critical Sections
RCU callbacks are registered via call_rcu(). After an RCU grace period elapses, the callback (which is a C-language function) is invoked. RCU’s fundamental guarantee states that once an RCU grace period has elapsed, all RCU read-side critical sections that were … Continue reading
Stupid SMP Tricks: Memory Barriers (RWC with rmb)
In the previous posting a code fragment dealt with memory ordering. Strangely enough, the foo_1() function contained only a pair of reads, but separated them with a full smp_mb() barrier. So why not use an smp_rmb() instead? Perhaps something like … Continue reading
paulmckrcu 