diff --git a/Ubiquitous/XiZi_AIoT/services/app/Makefile b/Ubiquitous/XiZi_AIoT/services/app/Makefile
index 9c10dc508..76ed8500e 100644
--- a/Ubiquitous/XiZi_AIoT/services/app/Makefile
+++ b/Ubiquitous/XiZi_AIoT/services/app/Makefile
@@ -89,7 +89,7 @@ test_priority: test_priority.o libserial.o printf.o usyscall.o arch_usyscall.o l
 	@${ld} ${user_ldflags} -e main -o $@ $^ ${board_specs}
 	@${objdump} -S $@ > $@.asm
 
-test_net:test_fs.o lwip_service.o libipc.o session.o libserial.o printf.o usyscall.o arch_usyscall.o libmem.o
+test_net: test_net.o lwip_service.o libipc.o session.o libserial.o printf.o usyscall.o arch_usyscall.o libmem.o
 	@${ld} ${user_ldflags} -e main -o $@ $^ ${board_specs}
 	@${objdump} -S $@ > $@.asm
 
diff --git a/Ubiquitous/XiZi_AIoT/services/app/test_net.c b/Ubiquitous/XiZi_AIoT/services/app/test_net.c
index bf23bacf4..210bb35d5 100644
--- a/Ubiquitous/XiZi_AIoT/services/app/test_net.c
+++ b/Ubiquitous/XiZi_AIoT/services/app/test_net.c
@@ -12,10 +12,6 @@
 
 // test_net: Test the lwip network stack
 
-#include <assert.h>
-#include <stdbool.h>
-#include <string.h>
-
 #include "libserial.h"
 #include "lwip_service.h"
 #include "usyscall.h"
@@ -32,7 +28,7 @@ int main(int argc, char* argv[])
     char lwip_gwaddr[4] = { 192, 168, 130, 1 };
     LWIP_init(&sess, lwip_ipaddr, lwip_netmask, lwip_ipaddr);
     
-    free_session(&session);
+    free_session(&sess);
 
     exit(0);
     return 0;
diff --git a/Ubiquitous/XiZi_AIoT/services/fs/fs_server/include/block_io.h b/Ubiquitous/XiZi_AIoT/services/fs/fs_server/include/block_io.h
index 1bf3966bb..2fe14d8af 100644
--- a/Ubiquitous/XiZi_AIoT/services/fs/fs_server/include/block_io.h
+++ b/Ubiquitous/XiZi_AIoT/services/fs/fs_server/include/block_io.h
@@ -18,13 +18,13 @@
 
 // Block size
 #define BLOCK_SIZE 512
-#define NR_BIT_BLOCKS 4
+#define NR_BIT_BLOCKS 8
 
 // bits size
 #define BITS 8
 
 // Bitmap size of one block
-#define BITMAP_SIZE (BLOCK_SIZE * BITS * NR_BIT_BLOCKS)
+#define BITMAP_SIZE (BLOCK_SIZE * BITS)
 
 // Inode size of one block
 #define INODE_SIZE (BLOCK_SIZE / sizeof(struct Inode))
diff --git a/Ubiquitous/XiZi_AIoT/services/net/libnet/lwip_service.c b/Ubiquitous/XiZi_AIoT/services/net/libnet/lwip_service.c
index cb251fd6b..9b525c889 100644
--- a/Ubiquitous/XiZi_AIoT/services/net/libnet/lwip_service.c
+++ b/Ubiquitous/XiZi_AIoT/services/net/libnet/lwip_service.c
@@ -17,3 +17,4 @@ void LWIP_init(struct Session* session, char* ip, char* mask, char* gw){
     IPC_CALL(Ipc_LWIP_init)(session, ip, mask, gw);
 }
 
+ 
\ No newline at end of file
diff --git a/Ubiquitous/XiZi_AIoT/services/tools/mkfs/mkfs.c b/Ubiquitous/XiZi_AIoT/services/tools/mkfs/mkfs.c
index 027d9dd5c..d76cc62f0 100755
--- a/Ubiquitous/XiZi_AIoT/services/tools/mkfs/mkfs.c
+++ b/Ubiquitous/XiZi_AIoT/services/tools/mkfs/mkfs.c
@@ -263,8 +263,8 @@ void balloc(int used)
     uchar buf[BLOCK_SIZE];
     int i;
     printf("balloc: first %d blocks have been allocated\n", used);
-    bzero(buf, BLOCK_SIZE);
     for (int bmsec = 0; bmsec < bitblocks; bmsec++) {
+        bzero(buf, BLOCK_SIZE);
         for (i = 0; i < ((used > NR_BIT_PER_BYTE * BLOCK_SIZE) ? NR_BIT_PER_BYTE * BLOCK_SIZE : used); i++) {
             buf[i / NR_BIT_PER_BYTE] = buf[i / NR_BIT_PER_BYTE] | (0x1 << (i % NR_BIT_PER_BYTE));
         }
diff --git a/Ubiquitous/XiZi_AIoT/services/tools/mkfs/mkfs.h b/Ubiquitous/XiZi_AIoT/services/tools/mkfs/mkfs.h
index 17fa8adab..e44e96798 100755
--- a/Ubiquitous/XiZi_AIoT/services/tools/mkfs/mkfs.h
+++ b/Ubiquitous/XiZi_AIoT/services/tools/mkfs/mkfs.h
@@ -49,7 +49,7 @@ Modification:
 #define ROOT_INUM 1 // root inode number
 #define BLOCK_SIZE 512 // block size
 #define NR_BIT_PER_BYTE 8
-#define NR_BIT_BLOCKS 4
+#define NR_BIT_BLOCKS 8
 #define nr_blocks_total (BLOCK_SIZE * NR_BIT_PER_BYTE * NR_BIT_BLOCKS) // total number of blocks (including used blocks and free blocks)
 #define nr_inodes 200 // total number of inodes