On Tue, Jul 17, 2018 at 6:25 AM, Michal Hocko [off-list ref] 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