diff --git a/make.sh b/make.sh
index 981a18f..940bf4c 100755
--- a/make.sh
+++ b/make.sh
@@ -153,10 +153,10 @@ gcc -o a.out $tmp_src_filename 2>/dev/null && ./a.out
 }
 
 tmp_filename=fast_dirent_macros.txt
-check_dirent_field d_namlen > $tmp_filename
+check_dirent_field d_type   >  $tmp_filename
 check_dirent_field d_reclen >> $tmp_filename
+check_dirent_field d_namlen >> $tmp_filename
 check_dirent_field d_off    >> $tmp_filename
-check_dirent_field d_type   >> $tmp_filename
 
 cat <<EOF > src/_os_define.h
 #ifndef _OS_DEFINE_H
diff --git a/src/logger.h b/src/logger.h
index 1930052..128e151 100644
--- a/src/logger.h
+++ b/src/logger.h
@@ -145,6 +145,7 @@ static inline int log_try_init()
 */
 int log_init2();
 
+
 #define log_reopen() log_reopen_ex(&g_log_context)
 
 #define log_set_prefix(base_path, filename_prefix) \
@@ -273,6 +274,24 @@ void log_take_over_stderr_ex(LogContext *pContext);
 */
 void log_take_over_stdout_ex(LogContext *pContext);
 
+
+/** init function using global log context
+ *  do nothing when already inited
+ *  return: 0 for success, != 0 fail
+*/
+static inline int log_try_init2()
+{
+    int result;
+    if ((result=log_try_init()) != 0)
+    {
+        return result;
+    }
+
+    log_take_over_stderr();
+    log_take_over_stdout();
+    return 0;
+}
+
 /** set compress_log_flags to true
  *  parameters:
  *           pContext: the log context
diff --git a/src/sockopt.c b/src/sockopt.c
index 7d6b058..127c407 100644
--- a/src/sockopt.c
+++ b/src/sockopt.c
@@ -33,8 +33,11 @@
 #define SUB_NET_TYPE_INNER_172_STR3 "inner172"
 #define SUB_NET_TYPE_INNER_192_STR3 "inner192"
 
+#if defined(IOV_MAX) && IOV_MAX > 256
 #define FC_IOV_BATCH_SIZE  256
-
+#else
+#define FC_IOV_BATCH_SIZE  IOV_MAX
+#endif
 
 #if defined(OS_LINUX) || defined(OS_FREEBSD)
 #include <ifaddrs.h>