On Thu, Mar 29, 2018 at 05:40:35PM +0200, Jan Kara wrote: > So ext4_direct_IO() for IS_DAX() files will just bail out. So could you > just provide ext4_dax_direct_IO() which will bail out and use it here? With > a similar comment as in xfs_vm_direct_IO() that open still needs this > method set... Thanks! In fact a common noop_direct_IO might make sense.