diff -X /home/npollitt/dontdiff -Nur 243-ac3/linux/fs/proc/array.c mine/linux/fs/proc/array.c
--- 243-ac3/linux/fs/proc/array.c	Tue Mar 27 16:21:37 2001
+++ mine/linux/fs/proc/array.c	Tue Mar 27 16:23:24 2001
@@ -343,7 +343,7 @@
 	read_unlock(&tasklist_lock);
 	res = sprintf(buffer,"%d (%s) %c %d %d %d %d %d %lu %lu \
 %lu %lu %lu %lu %lu %ld %ld %ld %ld %ld %ld %lu %lu %ld %lu %lu %lu %lu %lu \
-%lu %lu %lu %lu %lu %lu %lu %lu %d %d\n",
+%lu %lu %lu %lu %lu %lu %lu %lu %d %d %lu\n",
 		task->pid,
 		task->comm,
 		state,
@@ -386,7 +386,8 @@
 		task->nswap,
 		task->cnswap,
 		task->exit_signal,
-		task->processor);
+		task->processor,
+		task->cpus_allowed);
 	if(mm)
 		mmput(mm);
 	return res;
diff -X /home/npollitt/dontdiff -Nur 243-ac3/linux/include/linux/prctl.h mine/linux/include/linux/prctl.h
--- 243-ac3/linux/include/linux/prctl.h	Sun Mar 19 11:15:32 2000
+++ mine/linux/include/linux/prctl.h	Tue Mar 27 16:23:24 2001
@@ -20,4 +20,9 @@
 #define PR_GET_KEEPCAPS   7
 #define PR_SET_KEEPCAPS   8
 
+#define PR_GET_RUNON	  9
+#define PR_SET_RUNON	  10
+#define PR_MUSTRUN_PID    11
+#define PR_RUNANY_PID     12
+
 #endif /* _LINUX_PRCTL_H */
diff -X /home/npollitt/dontdiff -Nur 243-ac3/linux/kernel/sched.c mine/linux/kernel/sched.c
--- 243-ac3/linux/kernel/sched.c	Tue Mar 27 16:21:38 2001
+++ mine/linux/kernel/sched.c	Tue Mar 27 16:23:24 2001
@@ -112,6 +112,10 @@
 #ifdef CONFIG_SMP
 
 #define idle_task(cpu) (init_tasks[cpu_number_map(cpu)])
+#define can_schedule_goodness(p,cpu) ( (!(p)->has_cpu ||  \
+                                        p->processor == cpu) &&  \
+                                        ((p)->cpus_allowed & (1 << cpu)))
+
 #define can_schedule(p,cpu) ((!(p)->has_cpu) && \
 				((p)->cpus_allowed & (1 << cpu)))
 
@@ -119,6 +123,7 @@
 
 #define idle_task(cpu) (&init_task)
 #define can_schedule(p,cpu) (1)
+#define can_schedule_goodness(p,cpu) (1)
 
 #endif
 
@@ -594,7 +599,7 @@
 still_running_back:
 	list_for_each(tmp, &runqueue_head) {
 		p = list_entry(tmp, struct task_struct, run_list);
-		if (can_schedule(p, this_cpu)) {
+		if (can_schedule_goodness(p, this_cpu)) {
 			int weight = goodness(p, this_cpu, prev->active_mm);
 			if (weight > c)
 				c = weight, next = p;
diff -X /home/npollitt/dontdiff -Nur 243-ac3/linux/kernel/sys.c mine/linux/kernel/sys.c
--- 243-ac3/linux/kernel/sys.c	Tue Mar 27 16:21:38 2001
+++ mine/linux/kernel/sys.c	Tue Mar 27 16:23:24 2001
@@ -1255,12 +1255,95 @@
 			}
 			current->keep_capabilities = arg2;
 			break;
+		case PR_GET_RUNON:
+			error = put_user(current->cpus_allowed, (long *)arg2);
+			break;
+		case PR_SET_RUNON:
+			if (arg2 == 0)
+				arg2 = 1 << smp_processor_id();
+			arg2 &= cpu_online_map;
+			if (!arg2)
+				error = -EINVAL;
+			else {
+				current->cpus_allowed = arg2;
+				if (!(arg2 & (1 << smp_processor_id())))
+					current->need_resched = 1;
+			}
+			break;
+		case PR_MUSTRUN_PID:
+			/* arg2 is cpu, arg3 is pid */
+			if (arg2 == 0)
+				arg2 = 1 << smp_processor_id();
+			arg2 &= cpu_online_map;
+			if (!arg2)
+				error = -EINVAL;
+			error = mp_mustrun_pid(arg2, arg3);
+			break;
+		case PR_RUNANY_PID:
+			/* arg2 is pid */
+			if (!arg2)
+				error = -EINVAL;
+			error = mp_runany_pid(arg2);
+			break;
 		default:
 			error = -EINVAL;
 			break;
 	}
 	return error;
 }
+
+static int mp_mustrun_pid(int cpu, int pid) 
+{
+	struct task_struct *p;
+	int ret;
+
+	ret = -EPERM;
+	/* Not allowed to change 1 */
+	if (pid == 1) 
+		goto out;
+
+	read_lock(&tasklist_lock);
+	p = find_task_by_pid(pid);
+	if (p)
+		get_task_struct(p);
+	read_unlock(&tasklist_lock);
+	if (!p)
+		ret = -ESRCH;
+
+	p->cpus_allowed = cpu;
+	p->need_resched = 1;
+	free_task_struct(p);
+	ret = 0;
+out:
+	return ret;
+}
+
+static int mp_runany_pid(int pid) 
+{
+	struct task_struct *p;
+	int ret;
+
+	ret = -EPERM;
+	/* Not allowed to change 1 */
+	if (pid == 1) 
+		goto out;
+
+	read_lock(&tasklist_lock);
+	p = find_task_by_pid(pid);
+	if (p)
+		get_task_struct(p);
+	read_unlock(&tasklist_lock);
+	if (!p)
+		ret = -ESRCH;
+
+	p->cpus_allowed = 0xFFFFFFFF;
+	p->need_resched = 0;
+	free_task_struct(p);
+	ret = 0;
+out:
+	return ret;
+}
+
 
 EXPORT_SYMBOL(notifier_chain_register);
 EXPORT_SYMBOL(notifier_chain_unregister);