* Matthew Garrett <mjg59@xxxxxxxxxxxxx> wrote: > On Mon, Jun 08, 2009 at 03:05:09PM +0200, Ingo Molnar wrote: > > > > * Rafael J. Wysocki <rjw@xxxxxxx> wrote: > > > Well, we've been discussing it for quite a while and since more > > > and more people are interested, I'm giving it a high priority. > > > > Cool. I think that if within a few years we could achieve that every > > default distro (both on desktops and on servers) triggers PM > > functionality runtime on common hardware, we'd both have lower power > > consumption in general, and we'd have more robust suspend-resume > > code as well. > > The difficulty is in determining when it's viable to autosuspend a > given device. There's a limit to how much we can determine purely > from kernel state (for instance, we could suspend ahci when > there's no pending disk access, but we'd lose hotplug > notifications) so there's going to have to be some level of > userspace policy determination. Having the infrastructure in the > kernel is an important part of this, but there'll be some distance > to go after that. What will the 'user space policy' bit do what the kernel cannot? If you mean the user has to configure something manually - that wont really happen in practice. We are happy if they know where to put those USB sticks in ;-) Ingo -- 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
