diff -up jdk8/common/autoconf/boot-jdk.m4.s390 jdk8/common/autoconf/boot-jdk.m4
--- jdk8/common/autoconf/boot-jdk.m4.s390	2014-03-11 16:01:27.000000000 -0400
+++ jdk8/common/autoconf/boot-jdk.m4	2014-05-21 11:50:36.507890197 -0400
@@ -315,12 +315,12 @@ AC_DEFUN_ONCE([BOOTJDK_SETUP_BOOT_JDK_AR
     fi
 
     # Minimum amount of heap memory.
-    ADD_JVM_ARG_IF_OK([-Xms64M],boot_jdk_jvmargs,[$JAVA])
+    ADD_JVM_ARG_IF_OK([-Xms256M],boot_jdk_jvmargs,[$JAVA])
     if test "x$OPENJDK_TARGET_OS" = "xmacosx"; then
       # Why does macosx need more heap? Its the huge JDK batch.
       ADD_JVM_ARG_IF_OK([-Xmx1600M],boot_jdk_jvmargs,[$JAVA])
     else
-      ADD_JVM_ARG_IF_OK([-Xmx1100M],boot_jdk_jvmargs,[$JAVA])
+      ADD_JVM_ARG_IF_OK([-Xmx768M],boot_jdk_jvmargs,[$JAVA])
     fi
     # When is adding -client something that speeds up the JVM?
     # ADD_JVM_ARG_IF_OK([-client],boot_jdk_jvmargs,[$JAVA])