Magnus Damm <magnus.damm@xxxxxxxxx> writes: > Still not sure how the system wide suspend is different from Runtime > PM and CPUidle from the hardware perspective... At least on OMAP and other embedded SoCs I'm familiar with, there is no difference from the hardware perspecitve. However, I understand that on ACPI-based systems, there are low-power that are only reachable via system-wide suspsend since ACPI does not provide the kernel with fine-grained control to hit those states during idle. That being said, I don't think this should be an issue since opportunistic suspend is currently targetted primarily at embedded HW which has much more fine-grained power control than traditional ACPI-based systems. To me the only real difference between system-wide suspend and runtime PM + CPUidle is the freezing of userspace. As has been discussed elsewhere in this discussion, any alternative solution must address the freezing/idling of userspace. Kevin _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
