On 28 Mar 2008 08:43:40 +0100 Andi Kleen <andi@xxxxxxxxxxxxxx> wrote: > Kristen Carlson Accardi <kristen.c.accardi@xxxxxxxxx> writes: > > > If a port doesn't support hot plug, there's no reason to keep the phy powered > > on unoccupied ports. > > Would it be possible to add some writable sysfs attribute for this too? > > A lot of ports support hot plug, but the users knows they will never actually > hot plug anything there. Exposing it to sysfs would make sense so > someone could make a conscious decision to save these watts by sacrifying > hotplug-support. > > -Andi > I had thought about extending the sysfs interface for link power management to include a new value: off. Right now we have min_power, medium_power, and max_performance - we could add a value for just "off" which means the port is inactive - but then we'd have to change all the sysfs stuff to check and see if the user is turning the port back on after it's been off and then re-init everything, so it might be a large effort, so if we did that I'd say it should be a separate effort from this patch series. -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
