diff --git a/components/dfs/dfs_v2/src/dfs_dentry.c b/components/dfs/dfs_v2/src/dfs_dentry.c
index 634bcfe6b9a..a04fb191b73 100644
--- a/components/dfs/dfs_v2/src/dfs_dentry.c
+++ b/components/dfs/dfs_v2/src/dfs_dentry.c
@@ -90,7 +90,10 @@ struct dfs_dentry * dfs_dentry_ref(struct dfs_dentry *dentry)
     RT_ASSERT(dentry);
 
     rt_atomic_add(&(dentry->ref_count), 1);
-
+    if (dentry->vnode)
+    {
+        rt_atomic_add(&(dentry->vnode->ref_count), 1);  // TODO: dont add vnode's ref
+    }
     return dentry;
 }
 
@@ -98,17 +101,12 @@ struct dfs_dentry *dfs_dentry_unref(struct dfs_dentry *dentry)
 {
     rt_err_t ret = RT_EOK;
 
-    RT_ASSERT(dentry);
+    RT_ASSERT(dentry && (dentry->flags & DENTRY_IS_ALLOCED));
 
     ret = dfs_file_lock();
     if (ret == RT_EOK)
     {
-        if (dentry->flags & DENTRY_IS_ALLOCED)
-        {
-            rt_atomic_sub(&(dentry->ref_count), 1);
-        }
-
-        if (rt_atomic_load(&(dentry->ref_count)) == 0)
+        if (rt_atomic_dec_and_test(&(dentry->ref_count)))
         {
             DLOG(msg, "dentry", "dentry", DLOG_MSG, "free dentry, ref_count=0");
             if (dentry->flags & DENTRY_IS_ADDHASH)
diff --git a/components/dfs/dfs_v2/src/dfs_file.c b/components/dfs/dfs_v2/src/dfs_file.c
index 11bb70fe6b3..46b8b08c9c1 100644
--- a/components/dfs/dfs_v2/src/dfs_file.c
+++ b/components/dfs/dfs_v2/src/dfs_file.c
@@ -201,6 +201,14 @@ void dfs_file_deinit(struct dfs_file *file)
 {
     RT_ASSERT(file);
 
+    if (file->fops && file->fops->close)
+    {
+        if (file->fops->close(file) != RT_EOK)
+        {
+            LOG_E("file %p close error", file);
+        }
+    }
+
     rt_mutex_detach(&file->pos_lock);
 
     if (file->dentry)
@@ -210,7 +218,7 @@ void dfs_file_deinit(struct dfs_file *file)
 
     if (file->vnode)
     {
-        dfs_vnode_unref(file->vnode);
+        //dfs_vnode_unref(file->vnode);
     }
 
     if (file->mmap_context)
diff --git a/components/dfs/dfs_v2/src/dfs_mnt.c b/components/dfs/dfs_v2/src/dfs_mnt.c
index 4ad73c6dee9..aa0f74072cd 100644
--- a/components/dfs/dfs_v2/src/dfs_mnt.c
+++ b/components/dfs/dfs_v2/src/dfs_mnt.c
@@ -233,11 +233,10 @@ struct dfs_mnt *dfs_mnt_lookup(const char *fullpath)
 
 struct dfs_mnt* dfs_mnt_ref(struct dfs_mnt* mnt)
 {
-    if (mnt)
-    {
-        rt_atomic_add(&(mnt->ref_count), 1);
-        DLOG(note, "mnt", "mnt(%s),ref_count=%d", mnt->fs_ops->name, rt_atomic_load(&(mnt->ref_count)));
-    }
+    RT_ASSERT(mnt);
+
+    rt_atomic_add(&(mnt->ref_count), 1);
+    DLOG(note, "mnt", "mnt(%s),ref_count=%d", mnt->fs_ops->name, rt_atomic_load(&(mnt->ref_count)));
 
     return mnt;
 }
@@ -248,9 +247,7 @@ int dfs_mnt_unref(struct dfs_mnt* mnt)
 
     if (mnt)
     {
-        rt_atomic_sub(&(mnt->ref_count), 1);
-
-        if (rt_atomic_load(&(mnt->ref_count)) == 0)
+        if (rt_atomic_dec_and_test(&(mnt->ref_count)))
         {
             dfs_lock();
 
diff --git a/components/dfs/dfs_v2/src/dfs_pcache.c b/components/dfs/dfs_v2/src/dfs_pcache.c
index 1f2b2fab75e..024996e0169 100644
--- a/components/dfs/dfs_v2/src/dfs_pcache.c
+++ b/components/dfs/dfs_v2/src/dfs_pcache.c
@@ -721,9 +721,7 @@ static void dfs_page_unref(struct dfs_page *page)
 
     dfs_aspace_lock(aspace);
 
-    rt_atomic_sub(&(page->ref_count), 1);
-
-    if (rt_atomic_load(&(page->ref_count)) == 0)
+    if (rt_atomic_dec_and_test(&(page->ref_count)))
     {
         dfs_page_unmap(page);