On Wed, 2011-11-02 at 23:17 +0800, Tejun Heo wrote: > Hello, > > On Wed, Nov 02, 2011 at 02:21:37PM +0800, Lin Ming wrote: > > These 3 patches add ata port runtime pm support, which is done through scsi layer. > > scsi host runtime pm mechanism is already there(scsi_pm.c). > > These patches add hooks for ata port. > > > > Lin Ming (3): > > scsi: fix potential dead lock for host runtime pm > > scsi: add hooks for host runtime power management > > ata: implement ata port runtime pm hooks > > Hmmm.... Some questions. > > * How much does this add on top of hardware timed auto spindown and > dynamic link power management? Sorry, I don't understand this question. What do you mean? > > * Do the added benefits justify yet another runtime powersaving > mechanism? There will be ACPI firmware which supports ata port runtime D3Cold. To enable ata port runtime PM is the first step. > > * Any way we can tie the other stuff with overall runtime PM? What's the other stuff? Do you mean tie disk/link/port/controller stuff with overall runtime PM? I'm not sure for now. Need to think about it more. -- 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
