--- old/src/share/vm/gc/shared/collectorPolicy.cpp	2016-03-11 15:16:45.334285116 +0100
+++ new/src/share/vm/gc/shared/collectorPolicy.cpp	2016-03-11 15:16:45.167278120 +0100
@@ -96,6 +96,9 @@
   }
 
   // Check heap parameter properties
+  if (MaxHeapSize < 2 * M) {
+    vm_exit_during_initialization("Too small maximum heap");
+  }
   if (InitialHeapSize < M) {
     vm_exit_during_initialization("Too small initial heap");
   }
--- old/test/gc/arguments/TestMaxHeapSizeTools.java	2016-03-11 15:16:45.526293159 +0100
+++ new/test/gc/arguments/TestMaxHeapSizeTools.java	2016-03-11 15:16:45.413288425 +0100
@@ -112,10 +112,12 @@
   }
 
   private static void checkInvalidMinInitialHeapCombinations(String gcflag) throws Exception {
+    expectError(new String[] { gcflag, "-XX:InitialHeapSize=1023K", "-version" });
     expectError(new String[] { gcflag, "-Xms64M", "-XX:InitialHeapSize=32M", "-version" });
   }
 
   private static void checkValidMinInitialHeapCombinations(String gcflag) throws Exception {
+    expectValid(new String[] { gcflag, "-XX:InitialHeapSize=1024K", "-version" });
     expectValid(new String[] { gcflag, "-XX:InitialHeapSize=8M", "-Xms4M", "-version" });
     expectValid(new String[] { gcflag, "-Xms4M", "-XX:InitialHeapSize=8M", "-version" });
     expectValid(new String[] { gcflag, "-XX:InitialHeapSize=8M", "-Xms8M", "-version" });
@@ -124,11 +126,13 @@
   }
 
   private static void checkInvalidInitialMaxHeapCombinations(String gcflag) throws Exception {
+    expectError(new String[] { gcflag, "-XX:MaxHeapSize=2047K", "-version" });
     expectError(new String[] { gcflag, "-XX:MaxHeapSize=4M", "-XX:InitialHeapSize=8M", "-version" });
     expectError(new String[] { gcflag, "-XX:InitialHeapSize=8M", "-XX:MaxHeapSize=4M", "-version" });
   }
 
   private static void checkValidInitialMaxHeapCombinations(String gcflag) throws Exception {
+    expectValid(new String[] { gcflag, "-XX:MaxHeapSize=2048K", "-version" });
     expectValid(new String[] { gcflag, "-XX:InitialHeapSize=4M", "-XX:MaxHeapSize=8M", "-version" });
     expectValid(new String[] { gcflag, "-XX:MaxHeapSize=8M", "-XX:InitialHeapSize=4M", "-version" });
     expectValid(new String[] { gcflag, "-XX:MaxHeapSize=4M", "-XX:InitialHeapSize=4M", "-version" });