On Thu, 29 Jun 2017, Andy Lutomirski wrote:
> ping-pong between two mms on the same CPU using eventfd:
>   patched:         1.22Aus
>   patched, nopcid: 1.33Aus
>   unpatched:       1.34Aus
> 
> Same ping-pong, but now touch 512 pages (all zero-page to minimize
> cache misses) each iteration.  dTLB misses are measured by
> dtlb_load_misses.miss_causes_a_walk:
>   patched:         1.8Aus  11M  dTLB misses
>   patched, nopcid: 6.2Aus, 207M dTLB misses
>   unpatched:       6.1Aus, 190M dTLB misses
> 
> Reviewed-by: Nadav Amit <nadav.amit@gmail.com>
> Signed-off-by: Andy Lutomirski <luto@kernel.org>

Reviewed-by: Thomas Gleixner <tglx@linutronix.de>