diff --git a/modules/page/src/buffer_cache.rs b/modules/page/src/buffer_cache.rs
index 5c67cfdd..86f86069 100644
--- a/modules/page/src/buffer_cache.rs
+++ b/modules/page/src/buffer_cache.rs
@@ -48,21 +48,21 @@ impl BufferCache {
     }
 
     pub fn read_block(&mut self, block_id: usize, buf: &mut [u8]) {
-        // let buffer_head = self.get_buffer_head_from_disk(block_id);
-        // if buffer_head.has_cached() {
-        //     buffer_head.read_block(buf)
-        // } else {
-        self.device().base_read_block(block_id, buf)
-        // }
+        let buffer_head = self.get_buffer_head_from_disk(block_id);
+        if buffer_head.has_cached() {
+            buffer_head.read_block(buf)
+        } else {
+            self.device().base_read_block(block_id, buf)
+        }
     }
 
     pub fn write_block(&mut self, block_id: usize, buf: &[u8]) {
-        // let buffer_head = self.get_buffer_head_from_disk(block_id);
-        // if buffer_head.has_cached() {
-        //     buffer_head.write_block(buf)
-        // } else {
-        self.device().base_write_block(block_id, buf)
-        // }
+        let buffer_head = self.get_buffer_head_from_disk(block_id);
+        if buffer_head.has_cached() {
+            buffer_head.write_block(buf)
+        } else {
+            self.device().base_write_block(block_id, buf)
+        }
     }
 
     pub fn get_buffer_head_from_disk(&mut self, block_id: usize) -> Arc<BufferHead> {
diff --git a/modules/vfs-core/src/dentry.rs b/modules/vfs-core/src/dentry.rs
index abbcb56d..2946545a 100644
--- a/modules/vfs-core/src/dentry.rs
+++ b/modules/vfs-core/src/dentry.rs
@@ -187,11 +187,6 @@ impl dyn Dentry {
     }
 
     pub fn lookup(self: &Arc<Self>, name: &str) -> SysResult<Arc<dyn Dentry>> {
-        // let hash_key = HashKey::new(self, name)?;
-        // if let Some(child) = dcache().get(hash_key) {
-        //     log::warn!("[Dentry::lookup] find child in hash");
-        //     return Ok(child);
-        // }
         if !self.inode()?.itype().is_dir() {
             return Err(SysError::ENOTDIR);
         }
@@ -252,7 +247,6 @@ impl dyn Dentry {
     /// Create a negetive child dentry with `name`.
     pub fn new_child(self: &Arc<Self>, name: &str) -> Arc<dyn Dentry> {
         let child = self.clone().base_new_child(name);
-        // dcache().insert(child.clone());
         child
     }