Re: [PATCH 0/10] psi: pressure stall information for CPU, memory, and IO v2

[Daniel Drake]

On Tue, Jul 17, 2018 at 6:25 AM, Michal Hocko <mhocko@xxxxxxxxxx> wrote:
> Yes this is really unfortunate. One thing that could help would be to
> consider a trashing level during the reclaim (get_scan_count) to simply
> forget about LRUs which are constantly refaulting pages back. We already
> have the infrastructure for that. We just need to plumb it in.

Can you go into a bit more detail about that infrastructure and how we
might detect which pages are being constantly refaulted? I'm
interested in spending a few hours on this topic to see if I can come
up with anything.

Thanks
Daniel