diff -NurpP linux-2.6.16-vs2.1.1-rc15/kernel/vserver/sched.c linux-2.6.16-vs2.1.1-rc16/kernel/vserver/sched.c
--- linux-2.6.16-vs2.1.1-rc15/kernel/vserver/sched.c	2006-04-02 04:04:11 +0200
+++ linux-2.6.16-vs2.1.1-rc16/kernel/vserver/sched.c	2006-04-12 01:54:01 +0200
@@ -18,7 +18,12 @@
 #include <asm/errno.h>
 #include <asm/uaccess.h>
 
-#define vxd_check_range(val, min, max)
+#define vxd_check_range(val, min, max) do {		\
+	vxlprintk((val<min) || (val>max),		\
+		"check_range(%ld,%ld,%ld)",		\
+		(long)val, (long)min, (long)max, 	\
+		__FILE__, __LINE__);			\
+	} while (0)
 
 
 void vx_update_sched_param(struct _vx_sched *sched,