X-Git-Url: https://git.lttng.org/?p=urcu.git;a=blobdiff_plain;f=doc%2Fexamples%2Furcu-flavors%2Fmb.c;h=62ad54bb7ff00309f7de7572116de1222bd8b7ee;hp=757fe9e0a7e3acae21bab6b59300a88c2f34d83d;hb=d7818a6fd0c57b576f3bacc67ddd62bc8a78fb05;hpb=9b4bf32b5757c99226eb78bea03f911536f2e9fc

diff --git a/doc/examples/urcu-flavors/mb.c b/doc/examples/urcu-flavors/mb.c
index 757fe9e..62ad54b 100644
--- a/doc/examples/urcu-flavors/mb.c
+++ b/doc/examples/urcu-flavors/mb.c
@@ -117,6 +117,15 @@ int main(int argc, char **argv)
 		call_rcu(&node->rcu_head, rcu_free_node);
 	}
 
+	/*
+	 * We can also wait for a quiescent state by calling
+	 * synchronize_rcu() rather than using call_rcu(). It is usually
+	 * a slower approach than call_rcu(), because the latter can
+	 * batch work. Moreover, call_rcu() can be called from a RCU
+	 * read-side critical section, but synchronize_rcu() should not.
+	 */
+	synchronize_rcu();
+
 	sleep(1);
 
 	/*