diff --git a/kernel/main.c b/kernel/main.c
index 0c8ef40..dd5f7f2 100644
--- a/kernel/main.c
+++ b/kernel/main.c
@@ -12,7 +12,7 @@ void
 main(unsigned long hartid, unsigned long dtb_pa)
 {
   
-  printf("hart %d enter main()...\n", hartid);
+  // printf("hart %d enter main()...\n", hartid);
   if (hartid == 0) {
     printf("\n");
     printf("xv6-k210 kernel is booting\n");
diff --git a/kernel/proc.c b/kernel/proc.c
index 3bfb039..5e0904b 100644
--- a/kernel/proc.c
+++ b/kernel/proc.c
@@ -574,10 +574,11 @@ scheduler(void)
         // to release its lock and then reacquire it
         // before jumping back to us.
         printf("[scheduler]found runnable proc: %d\n", p->pid);
+        // printf("%d\n", p->pid);
         p->state = RUNNING;
         c->proc = p;
         swtch(&c->context, &p->context);
-
+        printf("[scheduler]return from user mode\n");
         // Process is done running for now.
         // It should have changed its p->state before coming back.
         c->proc = 0;