Re: [PATCH V2] kmalloc_index optimization(code size & runtime stable)

[Matthew Wilcox]

On Mon, Apr 20, 2020 at 08:25:01PM -0700, Bernard Zhao wrote:
> kmalloc_index inline function code size optimization and runtime
> performance stability optimization. After optimization, the function
> kmalloc_index is more stable, the size will never affecte the function`s
> execution efficiency.

Please stop posting this patch until it's faster *for small sizes*.
As I explained last time you posted it, it's not an optimisation.

>             size        time/Per 100 million times
>                         old fun		new fun with optimise
> 		8	203777		241934
> 		16	245611		409278
> 		32	236384		408419
> 		64	275499		447732
> 		128	354909		416439

^^^^ these are the important cases that need to be fast.