[RFC PATCH 9/9] powerpc: rewrite local_t using soft_irq

[Nicholas Piggin]

On Mon, 25 Jul 2016 20:22:22 +0530
Madhavan Srinivasan <maddy at linux.vnet.ibm.com> wrote:

> https://lkml.org/lkml/2008/12/16/450
> 
> Modifications to Rusty's benchmark code:
>  - Executed only local_t test
> 
> Here are the values with the patch.
> 
> Time in ns per iteration
> 
> Local_t		Without Patch		With Patch
> 
> _inc			28		8
> _add			28		8
> _read			3		3
> _add_return		28		7
> 
> Tested the patch in a
>  - pSeries LPAR (with perf record)

Very nice. I'd like to see these patches get in. We can
probably use the feature in other places too.

Thanks,
Nick