diff -r 9c4f56ff88e9 -r eda9eb483d29 src/share/vm/runtime/arguments.cpp
--- a/src/share/vm/runtime/arguments.cpp	Thu Apr 07 16:52:15 2011 -0700
+++ b/src/share/vm/runtime/arguments.cpp	Thu Apr 07 17:16:20 2011 -0700
@@ -243,6 +243,12 @@
   { "MaxLiveObjectEvacuationRatio",
                            JDK_Version::jdk_update(6,24), JDK_Version::jdk(8) },
   { "ForceSharedSpaces",   JDK_Version::jdk_update(6,25), JDK_Version::jdk(8) },
+  { "UseParallelOldGCCompacting",
+                           JDK_Version::jdk_update(6,27), JDK_Version::jdk(8) },
+  { "UseParallelDensePrefixUpdate",
+                           JDK_Version::jdk_update(6,27), JDK_Version::jdk(8) },
+  { "UseParallelOldGCDensePrefix",
+                           JDK_Version::jdk_update(6,27), JDK_Version::jdk(8) },
   { NULL, JDK_Version(0), JDK_Version(0) }
 };