Subject: Re: [PATCH 00/19] Context switch improvements

From: Anshuman Khandual <[email-masked]>
Date: Wed, 02 Dec 2015 14:12:43 +0530

On 10/29/2015 06:13 AM, Anton Blanchard wrote:
> Here are various improvements to our context switch path. Some of the
> highlights:
> 
> - Group all mfsprs and mtsprs in __switch_to(), which gives us a
>   10% improvement on POWER8.
> 
> - Create giveup_all() and flush_all_to_thread() so we only write the
>   MSR once, which gives us a 3% improvement on POWER8.
> 
> - Create disable_kernel_{fp,altivec,vsx,spe}() and add a debug boot
>   option (ppc_strict_facility_enable) to minimise kernel code running
>   with floating point and vector bits enabled.
> 
> - Make giveup_vsx() and flush_vsx_to_thread() handle FP and Altivec
>   state, so they behave more like their sister functions.
> 
> Scott: There are changes to the SPE code here which I have only been
> able to compile test.

Hey Anton,

Wondering if you have a git tree hosted some where to pull these patches ?

-- Anshuman