--- mono-2.8/mono/mini/main.c	2010-09-10 21:55:45.000000000 +0100
+++ mono-2.8/mono/mini/main-new.c	2010-09-15 13:26:40.582184193 +0100
@@ -88,10 +88,14 @@
 }
 
 #else
-
+#include <sched.h>
 int
 main (int argc, char* argv[])
 {
+#ifdef __powerpc__
+  unsigned long mask = 1;
+  sched_setaffinity(0, sizeof(mask), &mask);
+#endif
 	mono_build_date = build_date;
 	
 	return mono_main_with_options (argc, argv);