From: Mathieu Desnoyers Date: Fri, 14 Jun 2013 12:30:21 +0000 (-0400) Subject: document rcu barrier X-Git-Url: https://git.lttng.org/?a=commitdiff_plain;h=e3481e91d0d7f536042e1c6e5e5e885037230e68;p=userspace-rcu.git document rcu barrier Signed-off-by: Mathieu Desnoyers --- diff --git a/doc/rcu-api.txt b/doc/rcu-api.txt index 2a7e734..b647316 100644 --- a/doc/rcu-api.txt +++ b/doc/rcu-api.txt @@ -62,6 +62,15 @@ void call_rcu(struct rcu_head *head, call_rcu should be called from registered RCU read-side threads. For the QSBR flavor, the caller should be online. +void rcu_barrier(void); + + Wait for all call_rcu() work initiated prior to rcu_barrier() by + _any_ thread on the system to have completed before rcu_barrier() + returns. rcu_barrier() should never be called from a call_rcu() + thread. This function can be used, for instance, to ensure that + all memory reclaim involving a shared object has completed + before allowing dlclose() of this shared object to complete. + struct call_rcu_data *create_call_rcu_data(unsigned long flags, int cpu_affinity);