Arjan van de Ven wrote: > On Mon, 16 Nov 2009 03:06:32 +0900 > Tejun Heo <tj@xxxxxxxxxx> wrote: > >> There's DIPM. > > where in the code is this? In ata_dev_set_dipm()? > And just to be clear: DIPM is done by the hardware so that it needs > sampling/etc features, rather than just straightforward (free) software > accounting when you do software controller transitions ? Enabling DIPM means that the drive will be in charge of transitioning the link into powersave modes, so if sampling SStatus is necessary to determine how much time the link spends in powersave mode. Thanks. -- tejun -- 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
