--- old/src/java.base/share/classes/java/util/concurrent/Phaser.java	2021-02-09 06:27:11.295635661 -0800
+++ new/src/java.base/share/classes/java/util/concurrent/Phaser.java	2021-02-09 06:27:10.995637965 -0800
@@ -148,6 +148,12 @@
  * returns snapshots of these state queries in a form convenient for
  * informal monitoring.
  *
+ * <p>Memory consistency effects: Actions prior to any form of arrive
+ * method <a href="package-summary.html#MemoryVisibility">
+ * <i>happen-before</i></a> a corresponding phase advance and
+ * onAdvance actions (if present), which in turn <i>happen-before</i>
+ * actions following the phase advance.
+ *
  * <p><b>Sample usages:</b>
  *
  * <p>A {@code Phaser} may be used instead of a {@code CountDownLatch}