Index: sched_ule.c
===================================================================
RCS file: /home/ncvs/src/sys/kern/sched_ule.c,v
retrieving revision 1.209
diff -u -r1.209 sched_ule.c
--- sched_ule.c	24 Sep 2007 00:28:54 -0000	1.209
+++ sched_ule.c	26 Sep 2007 14:45:03 -0000
@@ -71,8 +71,8 @@
 #include <machine/cpu.h>
 #include <machine/smp.h>
 
-#ifndef PREEMPTION
-#error	"SCHED_ULE requires options PREEMPTION"
+#if !defined(__i386__) && !defined(__amd64__)
+#error "This architecture is not currently compatible with ULE"
 #endif
 
 #define	KTR_ULE	0
@@ -174,7 +174,15 @@
 static int realstathz;
 static int tickincr;
 static int sched_slice;
+#ifdef PREEMPTION
+#ifdef FULL_PREEMPTION
+static int preempt_thresh = PRI_MAX_IDLE;
+#else
 static int preempt_thresh = PRI_MIN_KERN;
+#endif
+#else 
+static int preempt_thresh = 0;
+#endif
 
 /*
  * tdq - per processor runqs and statistics.  All fields are protected by the