--- 2.4.4pre3aa/kernel/sched.c.~1~	Sat Apr 14 15:49:11 2001
+++ 2.4.4pre3aa/kernel/sched.c	Sun Apr 15 18:31:14 2001
@@ -765,6 +765,8 @@
 	goto repeat_schedule;
 
 still_running:
+	if (!(prev->cpus_allowed & (1UL << this_cpu)))
+		goto still_running_back;
 	c = goodness(prev, this_cpu, prev->active_mm);
 	next = prev;
 	goto still_running_back;