Re: [RFC PATCH 2/3] lib/list_batch, x86: Enable list insertion/deletion batching in x86-64

[Peter Zijlstra]

On Tue, Jan 26, 2016 at 01:44:13PM -0800, Andi Kleen wrote:
> Waiman Long <Waiman.Long@xxxxxxx> writes:
> >
> > diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
> > index 330e738..443e41d 100644
> > --- a/arch/x86/Kconfig
> > +++ b/arch/x86/Kconfig
> > @@ -42,6 +42,7 @@ config X86
> >  	select ARCH_SUPPORTS_NUMA_BALANCING	if X86_64
> >  	select ARCH_USE_BUILTIN_BSWAP
> >  	select ARCH_USE_CMPXCHG_LOCKREF		if X86_64
> > +	select ARCH_USE_LIST_BATCHING		if X86_64
> 
> I would make it unconditional. The code is simple enough
> and shouldn't have drawbacks on smaller systems.

I agree with the sentiment but would like to see a benchmark done on a
small system to verify all the same.