diff -urNp --exclude CVS --exclude BitKeeper --exclude {arch} --exclude .arch-ids x-ref/include/linux/sysctl.h x/include/linux/sysctl.h
--- x-ref/include/linux/sysctl.h	2003-10-01 04:27:27.000000000 +0200
+++ x/include/linux/sysctl.h	2003-10-01 04:33:45.000000000 +0200
@@ -131,6 +131,7 @@ enum
 	KERN_EXCEPTION_TRACE=58, /* boolean: exception trace */
  	KERN_CORE_SETUID=59,	/* int: set to allow core dumps of setuid apps */
 	KERN_SHMBIGPAGESPERFILE=60, /* int: max bigpages per file */
+	KERN_SCHED_YIELD_SCALE=61, /* int: select between scalable or interactive */
 };
 
 
diff -urNp --exclude CVS --exclude BitKeeper --exclude {arch} --exclude .arch-ids x-ref/kernel/sched.c x/kernel/sched.c
--- x-ref/kernel/sched.c	2003-10-01 04:27:27.000000000 +0200
+++ x/kernel/sched.c	2003-10-01 04:27:29.000000000 +0200
@@ -1478,6 +1478,8 @@ out_unlock:
 	return retval;
 }
 
+int sysctl_sched_yield_scale = 1;
+
 asmlinkage long sys_sched_yield(void)
 {
 	runqueue_t *rq = this_rq();
@@ -1505,6 +1507,12 @@ asmlinkage long sys_sched_yield(void)
 	if (unlikely(array == rq->expired) && rq->active->nr_active)
 		goto out_unlock;
 
+	if (sysctl_sched_yield_scale) {
+		dequeue_task(current, array);
+		enqueue_task(current, rq->expired);
+		goto out_unlock;
+	}
+
 	list_del(&current->run_list);
 	if (!list_empty(array->queue + current->prio)) {
 		list_add(&current->run_list, array->queue[current->prio].next);
diff -urNp --exclude CVS --exclude BitKeeper --exclude {arch} --exclude .arch-ids x-ref/kernel/sysctl.c x/kernel/sysctl.c
--- x-ref/kernel/sysctl.c	2003-10-01 04:27:27.000000000 +0200
+++ x/kernel/sysctl.c	2003-10-01 04:34:14.000000000 +0200
@@ -55,6 +55,7 @@ extern int core_uses_pid;
 extern int core_setuid_ok;
 extern char core_pattern[];
 extern int cad_pid;
+extern int sysctl_sched_yield_scale;
 
 /* this is needed for the proc_dointvec_minmax for [fs_]overflow UID and GID */
 static int maxolduid = 65535;
@@ -287,6 +288,8 @@ static ctl_table kern_table[] = {
 	{KERN_EXCEPTION_TRACE,"exception-trace",
 	 &exception_trace,sizeof(int),0644,NULL,&proc_dointvec},
 #endif	
+	{KERN_SCHED_YIELD_SCALE, "sched_yield_scale",
+	 &sysctl_sched_yield_scale, sizeof(int), 0644, NULL, &proc_dointvec},
 	{0}
 };