diff --git a/source/module/monitor_kernel.c b/source/module/monitor_kernel.c
index 79d8103..f12d131 100644
--- a/source/module/monitor_kernel.c
+++ b/source/module/monitor_kernel.c
@@ -76,14 +76,13 @@ static long device_ioctl(struct file *file, unsigned int ioctl_num,
     printk(KERN_INFO "variable_monitor IOCTL_DUMP_LOG\n");
     ret = copy_from_user(&dump_param, (ioctl_dump_param *)ioctl_param,
                          sizeof(ioctl_dump_param));
-    printk(KERN_INFO "dump_param: %p %lu %p\n", dump_param.user_ptr_len,
+    printk(KERN_INFO "dump_param: %p %d %p\n", dump_param.user_ptr_len,
            dump_param.user_buf_len, dump_param.user_buf);
     if (!ret) {
-      // printk(KERN_INFO "ret\n");
       ret = copy_to_user_variant_buffer(
           &load_monitor_variant_buffer, dump_param.user_ptr_len,
           dump_param.user_buf, dump_param.user_buf_len);
-      printk(KERN_INFO "ret %d, %lu\n", ret, dump_param.user_buf_len);
+      printk(KERN_INFO "ret %d, %d\n", ret, dump_param.user_buf_len);
     }
     // printk(KERN_INFO "copy_to_user_variant_buffer \n");
     break;
diff --git a/source/module/monitor_kernel.h b/source/module/monitor_kernel.h
index d2bbdc6..7a2b56a 100644
--- a/source/module/monitor_kernel.h
+++ b/source/module/monitor_kernel.h
@@ -19,6 +19,7 @@ extern int dump_reset_sec;
 
 extern mm_tree mm_tree_struct;
 extern struct diag_variant_buffer load_monitor_variant_buffer; // global buffer
+#define LOAD_MONITOR_BUFFER_SIZE 256 * 1024 * 1024             // 10MB
 
 int monitor_init(void);  // monitor init
 void monitor_exit(void); // monitor exit
diff --git a/source/module/monitor_kernel_lib.c b/source/module/monitor_kernel_lib.c
index 31feb67..da46316 100644
--- a/source/module/monitor_kernel_lib.c
+++ b/source/module/monitor_kernel_lib.c
@@ -260,7 +260,7 @@ void diag_task_info_work(struct work_struct *work) {
   return;
 }
 /**
- * @brief all module function init. orig_X | buffer | workqueue
+ * @brief all module function init. orig_X | buffer 
  *
  * @return int
  */
@@ -270,8 +270,7 @@ int monitor_init(void) {
   ret = init_orig_fun(); // init orig_X
   if (ret)
     return ret;
-  //! todo
-  ret = init_buffer(256 * 1024 * 1024); // 512M
+  ret = init_buffer(LOAD_MONITOR_BUFFER_SIZE); // 256M
   if (ret)
     return -1;
   return 0;
@@ -335,6 +334,10 @@ int start_watch_variable(watch_arg warg) {
   return 0;
 }
 
+/**
+ * @brief reinit all timer's work
+ * 
+ */
 void init_work_all_hrTimer(void) {
   int i = 0;
   kernel_watch_timer *timer = NULL;
@@ -343,8 +346,6 @@ void init_work_all_hrTimer(void) {
     // init work
     INIT_WORK(&timer->wk, diag_task_info_work);
   }
-  // printk(KERN_INFO "HrTimer work init,module keep %d hrtimer for now\n",
-  // kernel_wtimer_num);
 }
 
 /**
@@ -402,6 +403,12 @@ enum hrtimer_restart check_variable_cb(struct hrtimer *timer) {
   return HRTIMER_RESTART; // restart timer
 }
 
+/**
+ * @brief for test only
+ * 
+ * @param id 
+ * @return int 
+ */
 int diag_pid(int id) {
   struct task_struct *tsk;
   int ret;
@@ -437,6 +444,12 @@ int diag_pid(int id) {
   return 0;
 }
 
+/**
+ * @brief for test only
+ * 
+ * @param id 
+ * @return int 
+ */
 int diag_tgid(int id) {
   struct task_struct *tsk;
   int ret;
diff --git a/source/module/monitor_proc.h b/source/module/monitor_proc.h
index 5afe3d3..33a3ead 100644
--- a/source/module/monitor_proc.h
+++ b/source/module/monitor_proc.h
@@ -2,7 +2,7 @@
 #define MODULE_MONITOR_PROC_H
 
 #define DEFAULT_INTERVAL_NS 10000 // 10us
-#define DEFAULT_DUMP_RESET_SEC 60  // 10s
+#define DEFAULT_DUMP_RESET_SEC 60  // 60s
 
 extern int def_interval_ns;
 extern int dump_reset_sec;
diff --git a/source/module/monitor_timer.c b/source/module/monitor_timer.c
index 705f97e..4652bc4 100644
--- a/source/module/monitor_timer.c
+++ b/source/module/monitor_timer.c
@@ -164,7 +164,10 @@ void cancel_all_hrTimer(void) {
   printk(KERN_INFO "HrTimer cancel,module keep %d hrtimer for now\n", kernel_wtimer_num);
 }
 
-
+/**
+ * @brief cancel all work
+ * 
+ */
 void cancel_all_work(void) {
   int i = 0;
   kernel_watch_timer *timer = NULL;
@@ -174,6 +177,10 @@ void cancel_all_work(void) {
   }
 }
 
+/**
+ * @brief destory all work
+ * 
+ */
 void cancel_destory_all_work(void) {
   int i = 0;
   kernel_watch_timer *timer = NULL;