--- a/hotspot/src/share/vm/runtime/arguments.cpp	Wed Feb 13 08:42:03 2013 -0800
+++ b/hotspot/src/share/vm/runtime/arguments.cpp	Thu Feb 14 11:01:05 2013 +0100
@@ -1257,7 +1257,7 @@
   // prefer minuscule survivor spaces so as not to waste
   // space for (non-existent) survivors
   if (FLAG_IS_DEFAULT(SurvivorRatio) && MaxTenuringThreshold == 0) {
-    FLAG_SET_ERGO(intx, SurvivorRatio, MAX2((intx)1024, SurvivorRatio));
+    FLAG_SET_ERGO(uintx, SurvivorRatio, MAX2((uintx)1024, SurvivorRatio));
   }
   // If OldPLABSize is set and CMSParPromoteBlocksToClaim is not,
   // set CMSParPromoteBlocksToClaim equal to OldPLABSize.
@@ -1897,6 +1897,24 @@
   // Keeping the heap 100% free is hard ;-) so limit it to 99%.
   MinHeapFreeRatio = MIN2(MinHeapFreeRatio, (uintx) 99);
 
+  // Min/MaxMetaspaceFreeRatio
+  status = status && verify_percentage(MinMetaspaceFreeRatio, "MinMetaspaceFreeRatio");
+  status = status && verify_percentage(MaxMetaspaceFreeRatio, "MaxMetaspaceFreeRatio");
+
+  if (MinMetaspaceFreeRatio > MaxMetaspaceFreeRatio) {
+    jio_fprintf(defaultStream::error_stream(),
+                "MinMetaspaceFreeRatio (%s" UINTX_FORMAT ") must be less than or "
+                "equal to MaxMetaspaceFreeRatio (%s" UINTX_FORMAT ")\n",
+                FLAG_IS_DEFAULT(MinMetaspaceFreeRatio) ? "Default: " : "",
+                MinMetaspaceFreeRatio,
+                FLAG_IS_DEFAULT(MaxMetaspaceFreeRatio) ? "Default: " : "",
+                MaxMetaspaceFreeRatio);
+    status = false;
+  }
+
+  // Trying to keep 100% free is not practical
+  MinMetaspaceFreeRatio = MIN2(MinMetaspaceFreeRatio, (uintx) 99);
+
   if (FullGCALot && FLAG_IS_DEFAULT(MarkSweepAlwaysCompactCount)) {
     MarkSweepAlwaysCompactCount = 1;  // Move objects every gc.
   }
@@ -1904,7 +1922,7 @@
   if (UseParallelOldGC && ParallelOldGCSplitALot) {
     // Settings to encourage splitting.
     if (!FLAG_IS_CMDLINE(NewRatio)) {
-      FLAG_SET_CMDLINE(intx, NewRatio, 2);
+      FLAG_SET_CMDLINE(uintx, NewRatio, 2);
     }
     if (!FLAG_IS_CMDLINE(ScavengeBeforeFullGC)) {
       FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false);