On Mon 28-05-18 19:40:19, kernel test robot wrote:
> 
> Greeting,
> 
> FYI, we noticed a +23.0% improvement of vm-scalability.throughput due to commit:
> 
> 
> commit: 309fe96bfc0ae387f53612927a8f0dc3eb056efd ("mm, memcontrol: implement memory.swap.events")
> https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master

This doesn't make any sense to me. The patch merely adds an accounting.
It doesn't optimize anything. So I strongly suspect the result is just
misleading or the test (environment) misconfigured. Not the first time
I am seeing something like that I am afraid.

-- 
Michal Hocko
SUSE Labs