diff --git a/src/sockopt.h b/src/sockopt.h
index 43f6fe8..14c4c27 100644
--- a/src/sockopt.h
+++ b/src/sockopt.h
@@ -17,7 +17,7 @@
 #define FAST_WRITE_BUFF_SIZE  256 * 1024
 
 typedef struct fast_if_config {
-    char name[IF_NAMESIZE];
+    char name[IF_NAMESIZE];    //if name
     char mac[32];
     char ipv4[IP_ADDRESS_SIZE];
     char ipv6[48];
@@ -340,8 +340,8 @@ int gethostaddrs(char **if_alias_prefixes, const int prefix_count, \
 /** get local if configs
  *  parameters:
  *          if_configs: store the if configs
- *          max_count: max ip address (max ip_addrs elements)
- *          count: store the ip address count
+ *          max_count: max ifconfig elements
+ *          count: store the ifconfig count
  *  return: error no, 0 success, != 0 fail
 */
 int getifconfigs(FastIFConfig *if_configs, const int max_count, int *count);
diff --git a/src/tests/test_mblock.c b/src/tests/test_mblock.c
index 3bbb155..be9b593 100644
--- a/src/tests/test_mblock.c
+++ b/src/tests/test_mblock.c
@@ -121,7 +121,7 @@ int main(int argc, char *argv[])
 		printf("procs: %d\n", info.procs);
 	}
 
-    stat("/etc/passwd", &st);
+    stat("/dev/zero", &st);
     printf("file inode: %ld\n", (long)st.st_ino);
     printf("file device: %ld\n", (long)st.st_dev);
     printf("file access time: %d.%ld\n", (int)st.st_atime, st.st_atimensec);