--- softlockup-prev.c	2008-03-03 12:35:01.000000000 +0100
+++ softlockup.c	2008-03-03 12:38:01.000000000 +0100
@@ -237,6 +237,8 @@ static int watchdog(void *__bind_cpu)
 
 	}
 
+	printk(KERN_WARN "-> watchdog(cpu: %d) is done\n", this_cpu);
+
 	return 0;
 }
 
@@ -249,6 +251,9 @@ cpu_callback(struct notifier_block *nfb,
 	int hotcpu = (unsigned long)hcpu;
 	struct task_struct *p;
 
+	printk(KERN_WARN "-> cpu_callback(cpu: %d, action: %lu, check_cpu: %d)\n",
+		hotcpu, action, check_cpu);
+
 	switch (action) {
 	case CPU_UP_PREPARE:
 	case CPU_UP_PREPARE_FROZEN: