On 28/07/2015 12:02, Wen Congyang wrote: > I have a question about rcu: while do we call wait_for_readers() > twice for 32-bit host?
Because there is a very small but non-zero probability of the counter going up by exactly 2^31 periods (periods are stored in bits 1-31 so you lose one bit) while the thread is sleeping. This detail of the implementation comes from URCU. Paolo
