--- a/jdk/test/tools/launcher/Settings.java	Wed Jan 08 11:19:25 2014 -0800
+++ b/jdk/test/tools/launcher/Settings.java	Fri Jan 17 21:54:30 2014 +0100
@@ -73,16 +73,20 @@
     }
 
     static void runTestOptionDefault() throws IOException {
+        String stackSize = "256"; // in kb
+        if (getArch().equals("ppc64")) {
+            stackSize = "800";
+        }
         TestResult tr = null;
         tr = doExec(javaCmd, "-Xms64m", "-Xmx512m",
-                "-Xss256k", "-XshowSettings", "-jar", testJar.getAbsolutePath());
+                "-Xss" + stackSize + "k", "-XshowSettings", "-jar", testJar.getAbsolutePath());
         containsAllOptions(tr);
         if (!tr.isOK()) {
             System.out.println(tr.status);
             throw new RuntimeException("test fails");
         }
         tr = doExec(javaCmd, "-Xms65536k", "-Xmx712m",
-                "-Xss256000", "-XshowSettings", "-jar", testJar.getAbsolutePath());
+                "-Xss" + stackSize + "000", "-XshowSettings", "-jar", testJar.getAbsolutePath());
         containsAllOptions(tr);
         if (!tr.isOK()) {
             System.out.println(tr.status);