Re: [PATCH] x86,switch_mm: skip atomic operations for init_mm

[Mike Galbraith]

On Fri, 2018-06-01 at 13:03 -0700, Andy Lutomirski wrote:
> 
> Mike, you never did say: do you have PCID on your CPU?

Yes.

>   Also, what is
> your workload doing to cause so many switches back and forth between
> init_mm and a task.

pipe-test measures pipe round trip, does nearly nothing but schedule.  

	-Mike