diff --git a/src/ipc.c b/src/ipc.c
index 058d6c2a3f47a23641d6cca6f36a8c7d38d39335..0105b1dc001abfe5195faec8acf0535ee90d2b4a 100644
--- a/src/ipc.c
+++ b/src/ipc.c
@@ -469,6 +469,8 @@ rt_err_t rt_sem_control(rt_sem_t sem, rt_uint8_t cmd, void *arg)
 		/* enable interrupt */
 		rt_hw_interrupt_enable(level);
 
+		rt_schedule();
+
 		return RT_EOK;
 	}
 
@@ -1153,6 +1155,8 @@ rt_err_t rt_event_control(rt_event_t event, rt_uint8_t cmd, void *arg)
 		/* enable interrupt */
 		rt_hw_interrupt_enable(level);
 
+		rt_schedule();
+
 		return RT_EOK;
 	}
 
@@ -1597,7 +1601,6 @@ rt_err_t rt_mb_control(rt_mailbox_t mb, rt_uint8_t cmd, void *arg)
 
 		/* resume all waiting thread */
 		rt_ipc_list_resume_all(&(mb->parent.suspend_thread));
-
 		/* also resume all mailbox private suspended thread */
 		rt_ipc_list_resume_all(&(mb->suspend_sender_thread));
 
@@ -1609,6 +1612,8 @@ rt_err_t rt_mb_control(rt_mailbox_t mb, rt_uint8_t cmd, void *arg)
 		/* enable interrupt */
 		rt_hw_interrupt_enable(level);
 
+		rt_schedule();
+
 		return RT_EOK;
 	}
 
@@ -2144,6 +2149,8 @@ rt_err_t rt_mq_control(rt_mq_t mq, rt_uint8_t cmd, void *arg)
 		/* enable interrupt */
 		rt_hw_interrupt_enable(level);
 
+		rt_schedule();
+
 		return RT_EOK;
 	}
 
diff --git a/src/kservice.c b/src/kservice.c
index 2a6733b14104c161ae1e47bdf7b633ec1818eb81..694cc735fa68ae1f50327aa7c534b5b62521bde2 100644
--- a/src/kservice.c
+++ b/src/kservice.c
@@ -20,6 +20,9 @@
 #include <rtthread.h>
 #include <rthw.h>
 
+/* use precision */
+#define RT_PRINTF_PRECISION
+
 /**
  * @addtogroup KernelService
  */
@@ -754,11 +757,11 @@ static rt_int32_t vsnprintf(char *buf, rt_size_t size, const char *fmt, va_list
 #endif
 		/* get the conversion qualifier */
 		qualifier = 0;
-		if (*fmt == 'h' || *fmt == 'l'
 #ifdef RT_PRINTF_LONGLONG
-				|| *fmt == 'L'
+		if (*fmt == 'h' || *fmt == 'l' || *fmt == 'L')
+#else
+		if (*fmt == 'h' || *fmt == 'l')
 #endif
-		   )
 		{
 			qualifier = *fmt;
 			++ fmt;