Index: mono/mini/main.c
--- mono/mini/main.c.orig
+++ mono/mini/main.c
@@ -385,10 +385,14 @@ main (int _argc, char* _argv[])
 }
 
 #else
-
+#include <sched.h>
 int
 main (int argc, char* argv[])
 {
+#if defined(__powerpc__) && defined (__GLIBC__)
+  unsigned long mask = 1;
+  sched_setaffinity(0, sizeof(mask), &mask);
+#endif
 	mono_build_date = build_date;
 
 #if TEST_ICALL_SYMBOL_MAP