> Speaking for all Intel hardware implemented from pre-history until now, > deep C-states is the best you can do, and there is no special offline > mode to save more power. We don't use deep c states currently; just HLT. Right now it doesn't make much difference because no multi socket servers do deep C states and secondary cores can normally not go deep on their own; but if any of this changes this code would need to be fixed. But cpu off line is really a special case -- maybe it is even possible to do something better on current hardware. > and if the BIOS is implemented properly, the core will be spinning in the > deepest available C-state. Of course, it would probably be more interesting > to simply leave the core on-line and let it go idle... I don't see any BIOS call in play_dead() -Andi - To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
