sf...@users.sourceforge.net:
> Here is a refined one. If you build aufs module by yourself. Use this.
:::
> commit eaa5a0db8e6977c884cb0d3c99f30c91d3aaba50
> Author: J. R. Okajima <hooanon...@gmail.com>
> Date: Fri Jun 9 07:44:36 2017 +0900
>
> aufs: bugfix, copy-up using clone_file_range() on XFS branch
>
> XFS has its version and older one doesn't support clone_file_range(). It
> simply returns EOPNOTSUPP. Additionally XFS acquires inode_lock for a
> normal read().
> This commit fixes the error path after trying clone_file_range().
:::
I've found the commit in linux-v4.10
6552321 2016-11-30 xfs: remove i_iolock and use i_rwsem in the VFS
inode instead
changed XFS' inode locking behaviour. So the patch should be applied
aufs4.10 and after.
J. R. Okajima
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