X-Git-Url: https://git.lttng.org/?p=urcu.git;a=blobdiff_plain;f=src%2Furcu-bp.c;h=ebe96c57da9630d3e43168ee32fa96da95277bfa;hp=c0fac8330bdc43a5d1eb58a6999057461c44a002;hb=2f6618651c31c05ba1adbb5cdcf0d92980c38f38;hpb=5592d04940700ff2bb06307660e28e47fad0606b;ds=sidebyside

diff --git a/src/urcu-bp.c b/src/urcu-bp.c
index c0fac83..ebe96c5 100644
--- a/src/urcu-bp.c
+++ b/src/urcu-bp.c
@@ -593,8 +593,13 @@ void rcu_sys_membarrier_status(int available)
 static
 void rcu_sys_membarrier_status(int available)
 {
-	if (available)
-		urcu_bp_has_sys_membarrier = 1;
+	/*
+	 * membarrier has blocking behavior, which changes the
+	 * application behavior too much compared to using barriers when
+	 * synchronize_rcu is used repeatedly (without using call_rcu).
+	 * Don't use membarrier for now, unless its use has been
+	 * explicitly forced when building liburcu.
+	 */
 }
 #endif