n;
+
 			/* update the extent length and mark as initialized */
 			ex->ee_len = cpu_to_le16(ee_len);
 			ext4_ext_try_to_merge(handle, inode, path, ex);
@@ -3367,7 +3376,9 @@ static int ext4_split_extent(handle_t *handle,
 			split_flag1 |= EXT4_EXT_MARK_UNWRIT1 |
 				       EXT4_EXT_MARK_UNWRIT2;
 		if (split_flag & EXT4_EXT_DATA_VALID2)
-			split_flag1 |= EXT4_EXT_DATA_ENTIRE_VALID1;
+			split_flag1 |= map->m_lblk > ee_block ?
+				       EXT4_EXT_DATA_PARTIAL_VALID1 :
+				       EXT4_EXT_DATA_ENTIRE_VALID1;
 		path = ext4_split_extent_at(handle, inode, path,
 				map->m_lblk + map->m_len, split_flag1, flags1);
 		if (IS_ERR(path)) {
-- 
2.51.0[PATCH 6.1.y 7/7] ext4: don't zero the entire extent if EXT4_EXT_DATA_PARTIAL_VALID1Sasha Levin <sashal@kernel.org> undefinedstable@vger.kernel.org undefined undefined undefined undefined undefined undefined¹