diff --git a/tools/memory-model/litmus-tests/IRIW+mbonceonces+OnceOnce.litmus b/tools/memory-model/litmus-tests/IRIW+mbonceonces+OnceOnce.litmus
index 50d5db9ea983b59cc4caf2c4def91c71da35f7ba..98a3716efa37ecc9ba4fd59e8560519ef33fab0a 100644
--- a/tools/memory-model/litmus-tests/IRIW+mbonceonces+OnceOnce.litmus
+++ b/tools/memory-model/litmus-tests/IRIW+mbonceonces+OnceOnce.litmus
@@ -7,7 +7,7 @@ C IRIW+mbonceonces+OnceOnce
  * between each pairs of reads.  In other words, is smp_mb() sufficient to
  * cause two different reading processes to agree on the order of a pair
  * of writes, where each write is to a different variable by a different
- * process?
+ * process?  This litmus test exercises LKMM's "propagation" rule.
  *)
 
 {}
diff --git a/tools/memory-model/litmus-tests/README b/tools/memory-model/litmus-tests/README
index 6919909bbd0f5c752d78dfebecdaeb557da125a9..17eb9a8c222dae122fa22b925b7af521190728f4 100644
--- a/tools/memory-model/litmus-tests/README
+++ b/tools/memory-model/litmus-tests/README
@@ -23,7 +23,8 @@ IRIW+mbonceonces+OnceOnce.litmus
 	between each pairs of reads.  In other words, is smp_mb()
 	sufficient to cause two different reading processes to agree on
 	the order of a pair of writes, where each write is to a different
-	variable by a different process?
+	variable by a different process?  This litmus test is forbidden
+	by LKMM's propagation rule.
 
 IRIW+poonceonces+OnceOnce.litmus
 	Test of independent reads from independent writes with nothing
@@ -119,8 +120,10 @@ S+wmbonceonce+poacquireonce.litmus
 
 WRC+poonceonces+Once.litmus
 WRC+pooncerelease+rmbonceonce+Once.litmus
-	These two are members of an extension of the MP litmus-test class
-	in which the first write is moved to a separate process.
+	These two are members of an extension of the MP litmus-test
+	class in which the first write is moved to a separate process.
+	The second is forbidden because smp_store_release() is
+	A-cumulative in LKMM.
 
 Z6.0+pooncelock+pooncelock+pombonce.litmus
 	Is the ordering provided by a spin_unlock() and a subsequent
diff --git a/tools/memory-model/litmus-tests/WRC+pooncerelease+rmbonceonce+Once.litmus b/tools/memory-model/litmus-tests/WRC+pooncerelease+rmbonceonce+Once.litmus
index 97fcbffde9a0784d25cdaac59d27ff0a8f82a553..ad3448b941e68a75fd0025552545e9b77bc54ec2 100644
--- a/tools/memory-model/litmus-tests/WRC+pooncerelease+rmbonceonce+Once.litmus
+++ b/tools/memory-model/litmus-tests/WRC+pooncerelease+rmbonceonce+Once.litmus
@@ -5,7 +5,9 @@ C WRC+pooncerelease+rmbonceonce+Once
  *
  * This litmus test is an extension of the message-passing pattern, where
  * the first write is moved to a separate process.  Because it features
- * a release and a read memory barrier, it should be forbidden.
+ * a release and a read memory barrier, it should be forbidden.  More
+ * specifically, this litmus test is forbidden because smp_store_release()
+ * is A-cumulative in LKMM.
  *)
 
 {}