diff --git a/README-builds.html b/README-builds.html
index 9a52859f8c2e15831b3d5b9e7f520de5e47a0ce6..5573c8cd2f1005c6dbc3c419575382c229ae6c83 100644
--- a/README-builds.html
+++ b/README-builds.html
@@ -355,12 +355,24 @@
                     </li>
                     <li>
                         Install a
-                        <a name="bootjdk">Bootstrap JDK</a>
-                        <br>
+                        <a name="bootjdk">Bootstrap JDK</a>.
                         All OpenJDK builds require access to a previously released
-                        JDK, this is often called a bootstrap JDK.
-                        Currently, for this JDK release we require
-                        JDK 7 Update 7 or newer.
+                        JDK called the <i>bootstrap JDK</i> or <i>boot JDK.</i>
+                        The general rule is that the bootstrap JDK
+                        must be an instance of the previous major
+                        release of the JDK. In addition, there may be
+                        a requirement to use a release at or beyond a
+                        particular update level.
+                        <br>&nbsp;<br>
+
+                        <b><i>Building JDK 8 requires use of a version
+                        of JDK 7 that is at Update 7 or newer. JDK 8
+                        developers should not use JDK 8 as the boot
+                        JDK, to ensure that JDK 8 dependencies are
+                        not introduced into the parts of the system
+                        that are built with JDK 7.</i></b>
+
+                        <br>&nbsp;<br>
                         The JDK 7 binaries can be downloaded from Oracle's 
                         <a href="http://www.oracle.com/technetwork/java/javase/downloads/index.html"
                            target="_blank">JDK 7 download site</a>.
diff --git a/common/makefiles/Main.gmk b/common/makefiles/Main.gmk
index 0120c1f33f399c6a8703c7e68437a9d12125ac1b..100584843fa4bc3e5edba1c7bd0bcd1181298798 100644
--- a/common/makefiles/Main.gmk
+++ b/common/makefiles/Main.gmk
@@ -183,7 +183,7 @@ bootcycle-images-only: start-make
 test: images test-only
 test-only: start-make
 	@$(call TargetEnter)
-	@($(CD) $(SRC_ROOT)/test && $(BUILD_LOG_WRAPPER) $(MAKE) -j1 -k JT_HOME=$(JT_HOME) MAKEFLAGS= PRODUCT_HOME=$(JDK_IMAGE_DIR) JPRT_JAVA_HOME=$(JDK_IMAGE_DIR) ALT_OUTPUTDIR=$(OUTPUT_ROOT) $(TEST)) || true
+	@($(CD) $(SRC_ROOT)/test && $(BUILD_LOG_WRAPPER) $(MAKE) -j1 -k MAKEFLAGS= JT_HOME=$(JT_HOME) PRODUCT_HOME=$(JDK_IMAGE_DIR) JPRT_JAVA_HOME=$(JDK_IMAGE_DIR) ALT_OUTPUTDIR=$(OUTPUT_ROOT) CONCURRENCY=$(JOBS) $(TEST)) || true
 	@$(call TargetExit)
 
 # Stores the tips for each repository. This file is be used when constructing the jdk image and can be