--- a/hotspot/src/cpu/ppc/vm/globals_ppc.hpp	Tue Jun 14 19:38:44 2016 +0200
+++ b/hotspot/src/cpu/ppc/vm/globals_ppc.hpp	Mon Jun 13 09:28:25 2016 +0200
@@ -40,9 +40,9 @@
 define_pd_global(bool, TrapBasedNullChecks,   true);
 define_pd_global(bool, UncommonNullCast,      true);  // Uncommon-trap NULLs passed to check cast.
 
-#define DEFAULT_STACK_YELLOW_PAGES (6)
+#define DEFAULT_STACK_YELLOW_PAGES (2)
 #define DEFAULT_STACK_RED_PAGES (1)
-#define DEFAULT_STACK_SHADOW_PAGES (6 DEBUG_ONLY(+2))
+#define DEFAULT_STACK_SHADOW_PAGES (20 DEBUG_ONLY(+2))
 #define DEFAULT_STACK_RESERVED_PAGES (1)
 
 #define MIN_STACK_YELLOW_PAGES DEFAULT_STACK_YELLOW_PAGES