[switching over to ext4 list] On Fri, Aug 31, 2018 at 5:19 PM cgxu519 <cgxu519@xxxxxxx> wrote: > > > Hi Amir, > > It seems godown will cause side effect on ext4/tune2fs, mount an ext4 > filesystem after running godown, > then tune2fs -l <dev> complains like below. so definitely it will not > pass d_type check. > > > [root@x201 xfstests-dev]# tune2fs -l /dev/mapper/test-test1 > tune2fs 1.44.2 (14-May-2018) > tune2fs: Superblock checksum does not match superblock while trying to > open /dev/mapper/test-test1 > Couldn't find valid filesystem superblock. > > Chengguang, Bringing this to the attention of ext4 developers, can you please re-iterate the reproducer (without the mention of overlayfs and genereic/474) to demonstrate the problem. And please try to avoid "top posting". Thanks, Amir.