diff --git a/drivers/net/mmnif.c b/drivers/net/mmnif.c
index 616652cc..ed702f3f 100644
--- a/drivers/net/mmnif.c
+++ b/drivers/net/mmnif.c
@@ -85,7 +85,7 @@ static int active = 0;
 
 /* decide wheter it's uses locking or not
  */
-static int disable_locking = 0;
+static int disable_locking = 1;
 
 /* decide whether deliver work to a worker thread or instantly process all packets
  */
diff --git a/kernel/tests.c b/kernel/tests.c
index 2996edd7..34f6c775 100644
--- a/kernel/tests.c
+++ b/kernel/tests.c
@@ -218,6 +218,7 @@ void* server_task(void* e)
     {
         kprintf("%d-",n);
         send(newsockfd,buffer,sizeof(buffer),0);
+        udelay(10);
     }
 
     tmp2 = get_clock_tick();