As explained in another thread I really think we need to get DAX to stop pretending to be direct I/O, which should also take care of the locking. The same issue also exists for ext2 and XFS so it needs to be solved at a higher level. -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html