> > Opportunistic suspend is just a deep idle state, nothing else. > > No. The useful property of opportunistic suspend is that nothing gets > scheduled. That's fundamentally different to a deep idle state. Nothing gets scheduled in a deep idle state either - its idle. We leave the idle state to schedule anything. I believe the constraint is - Do not auto-enter a state for which you cannot maintain the devices in use "properly". On a current PC that generally means 'not suspend', on a lot of embedded boards (including Android phones) it includes an opportunistic 'suspend' and also several states half way between the PC deepest idles and suspend. > > Stop thinking about suspend as a special mechanism. It's not - except > > for s2disk, which is an entirely different beast. > > On PCs, suspend has more in common with s2disk than it does C states. Todays PCs are a special case. More to the point I don't think anyone is expected opportunistic suspend to be useful on _todays_ x86 systems. Even on todays PCs your assumption is questionable for virtual machines where a VM suspend is a lot faster and rather useful. Alan _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
