Messages in this thread | | | Date | Mon, 06 Feb 2012 16:26:23 -0800 | From | David Daney <> | Subject | Re: [RFC] Extend mwait idle to optimize away IPIs when possible |
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On 02/06/2012 12:42 PM, Venkatesh Pallipadi wrote: [...] > index 5bed94e..6a56cb0 100644 > --- a/arch/x86/Kconfig > +++ b/arch/x86/Kconfig > @@ -170,6 +170,11 @@ config GENERIC_TIME_VSYSCALL > bool > default X86_64 > > +config AVOID_IPI_ON_IDLE > + bool > + depends on X86_64 > + default X86_64 > +
Can you get rid of this part...
> config ARCH_HAS_CPU_RELAX > def_bool y > [...] > diff --git a/arch/x86/kernel/acpi/cstate.c b/arch/x86/kernel/acpi/cstate.c > index f50e7fb..340c4e9 100644 > --- a/arch/x86/kernel/acpi/cstate.c > +++ b/arch/x86/kernel/acpi/cstate.c > @@ -161,6 +161,14 @@ EXPORT_SYMBOL_GPL(acpi_processor_ffh_cstate_probe); > */ > void mwait_idle_with_hints(unsigned long ax, unsigned long cx) > { > +#ifdef CONFIG_AVOID_IPI_ON_IDLE
... and change all of these to #ifdef CONFIG_64BIT
> + int oldval, cpu = smp_processor_id(); > + . . .
Thanks, David Daney
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