[Xen-devel] Re: [RFC PATCH V4 4/5] cpuidle: driver for xen

[Len Brown <lenb@xxxxxxxxxx>]

Is a CONFIG_XEN kernel supposed to use just HLT in idle?

xen_arch_setup() does this:

        pm_idle = default_idle;
        boot_option_idle_override = IDLE_HALT;

which has that effect.  I guess this makes sense b/c the
CONFIG_XEN kernel is Dom0 and the real C-sates are done
by the hypervisor?

Would the same CONFIG_XEN kernel binary ever not
run xen_arch_setup(), run on raw hardware, and want
to use idle states other than HLT?

thanks,
-Len Brown, Intel Open Source Technology Center



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