* Arjan van de Ven <arjan@xxxxxxxxxxxxx> [2009-09-24 14:22:28]: > On Thu, 24 Sep 2009 10:42:41 +0530 > Arun R Bharadwaj <arun@xxxxxxxxxxxxxxxxxx> wrote: > > > * Arun R Bharadwaj <arun@xxxxxxxxxxxxxxxxxx> [2009-09-22 16:55:27]: > > > > Hi Len, (or other acpi folks), > > > > I had a question regarding ACPI-cpuidle interaction in the current > > implementation. > > > > Currently, every cpu (i.e. acpi_processor) registers to cpuidle as > > a cpuidle_device. So every cpu has to go through the process of > > setting up the idle states and then registering as a cpuidle device. > > > > What exactly is the reason behind this? > > > > technically a BIOS can opt to give you C states via ACPI on some cpus, > but not on others. > > in practice when this happens it tends to be a bug.. but it's > technically a valid configuration So we will need to keep the per-cpu registration as of now because we may have such buggy BIOS in the field and we don't want the cpuidle framework to malfunction there. --Vaidy -- 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
