diff --git a/HISTORY b/HISTORY
index 10b2626..cbeed63 100644
--- a/HISTORY
+++ b/HISTORY
@@ -1,4 +1,7 @@
 
+Version 1.66  2023-02-12
+  * struct fast_task_info add field: nio_stages.next for epoll edge trigger
+
 Version 1.65  2023-01-09
   * locked_list.h: add functions locked_list_move and locked_list_move_tail
   * add function tcp_socket_connected
diff --git a/src/fast_task_queue.h b/src/fast_task_queue.h
index f74d336..57250de 100644
--- a/src/fast_task_queue.h
+++ b/src/fast_task_queue.h
@@ -100,13 +100,14 @@ struct fast_task_info
     struct {
         uint8_t current;
         volatile uint8_t notify;
+        volatile uint8_t next;
     } nio_stages; //stages for network IO
-    TaskContinueCallback continue_callback; //for continue stage
     volatile int8_t reffer_count;
     volatile int8_t canceled;  //if task canceled
     short connect_timeout;     //for client side
     short network_timeout;
 	int64_t req_count; //request count
+    TaskContinueCallback continue_callback; //for continue stage
 	TaskFinishCallback finish_callback;
 	struct nio_thread_data *thread_data;
 	void *ctx;  //context pointer for libserverframe nio
diff --git a/src/ioevent_loop.c b/src/ioevent_loop.c
index ce0ee19..83fe22d 100644
--- a/src/ioevent_loop.c
+++ b/src/ioevent_loop.c
@@ -100,23 +100,26 @@ int ioevent_loop(struct nio_thread_data *pThreadData,
 	FastTimerEntry head;
 	struct fast_task_info *task;
 	time_t last_check_time;
+    int save_extra_events;
 	int count;
 
 	memset(&ev_notify, 0, sizeof(ev_notify));
 	ev_notify.event.fd = FC_NOTIFY_READ_FD(pThreadData);
 	ev_notify.event.callback = recv_notify_callback;
 	ev_notify.thread_data = pThreadData;
-	if (ioevent_attach(&pThreadData->ev_puller,
-		pThreadData->pipe_fds[0], IOEVENT_READ,
-		&ev_notify) != 0)
+
+    save_extra_events = pThreadData->ev_puller.extra_events;
+    pThreadData->ev_puller.extra_events = 0; //disable edge trigger temporarily
+	if (ioevent_attach(&pThreadData->ev_puller, ev_notify.
+                event.fd, IOEVENT_READ, &ev_notify) != 0)
 	{
 		result = errno != 0 ? errno : ENOMEM;
-		logCrit("file: "__FILE__", line: %d, " \
-			"ioevent_attach fail, " \
-			"errno: %d, error info: %s", \
+		logCrit("file: "__FILE__", line: %d, "
+			"ioevent_attach fail, errno: %d, error info: %s",
 			__LINE__, result, STRERROR(result));
 		return result;
 	}
+    pThreadData->ev_puller.extra_events = save_extra_events; //restore
 
     pThreadData->deleted_list = NULL;
 	last_check_time = g_current_time;