--- old/src/share/vm/runtime/globals.cpp	2012-05-10 10:45:07.353359400 +0200
+++ new/src/share/vm/runtime/globals.cpp	2012-05-10 10:45:03.562552700 +0200
@@ -148,6 +148,8 @@
     st->print("-XX:%s=" UINTX_FORMAT, name, get_uintx());
   } else if (is_uint64_t()) {
     st->print("-XX:%s=" UINT64_FORMAT, name, get_uint64_t());
+  } else if (is_double()) {
+    st->print("-XX:%s=%f", name, get_double());
   } else if (is_ccstr()) {
     st->print("-XX:%s=", name);
     const char* cp = get_ccstr();
--- /dev/null	2012-05-10 10:45:07.000000000 +0200
+++ new/test/runtime/7167069/PrintAsFlag.java	2012-05-10 10:45:03.578152700 +0200
@@ -0,0 +1,14 @@
+/*
+ * Note that in the run command below the only important flag is PrintCommandLineFlags.
+ * The others are just flags of all types; bool, intx, uintx, uint64_t, double and ccstr.
+ *
+ * @test PrintAsFlag
+ * @summary verify that Flag::print_as_flag() works correctly. This is used by "jinfo -flag" and -XX:+PrintCommandLineFlags.
+ * @run main/othervm -XX:+PrintCommandLineFlags -XX:-ShowMessageBoxOnError -XX:BiasedLockingStartupDelay=4000 -XX:ParallelGCThreads=4 -XX:MaxRAM=1G -XX:CMSSmallCoalSurplusPercent=1.05 -XX:ErrorFile="file" PrintAsFlag
+ */
+
+public class PrintAsFlag {
+    public static void main(String... args) {
+        System.out.printf("Done");
+    }
+}