Hello, Could you update the ionice manpage (or release notes) to mention that regular user can't schedule a task with an "idle" class. A typical example is: guest@debian:~$ ionice -c3 cp X Y ioprio_set: Operation not permitted I fount some explanations at : http://ubuntuforums.org/archive/index.php/t-498394.html Thanks, Franklin Piat - To unsubscribe from this list: send the line "unsubscribe util-linux-ng" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html