diff --git a/fs/hmdfs/file_local.c b/fs/hmdfs/file_local.c
index c563ea44ade1a60713d312b434f39c8c98e3ec59..aaab5837b71b0b779272a2dbf851c5f6bd00bfb9 100644
--- a/fs/hmdfs/file_local.c
+++ b/fs/hmdfs/file_local.c
@@ -20,6 +20,17 @@
 #include "hmdfs_share.h"
 #include "hmdfs_trace.h"
 
+static inline void update_upper_file(struct file *upper_file, struct file *lower_file)
+{
+	loff_t upper_size = i_size_read(upper_file->f_inode);
+	loff_t lower_size = i_size_read(lower_file->f_inode);
+
+	if (upper_file->f_inode->i_mapping && upper_size != lower_size) {
+		i_size_write(upper_file->f_inode, lower_size);
+		truncate_inode_pages(upper_file->f_inode->i_mapping, 0);
+	}
+}
+
 int hmdfs_file_open_local(struct inode *inode, struct file *file)
 {
 	int err = 0;
@@ -49,6 +60,7 @@ int hmdfs_file_open_local(struct inode *inode, struct file *file)
 	} else {
 		gfi->lower_file = lower_file;
 		file->private_data = gfi;
+		update_upper_file(file, lower_file);
 		if (file->f_flags & (O_RDWR | O_WRONLY))
 			atomic_inc(&info->write_opened);
 	}