On Tue, Oct 22, 2019 at 10:30:02AM +0200, Michal Hocko wrote: > But we have destructors for compound pages. Can we do the heavy lifting > there? Yes, we could. Actually, I tried that approach, but I thought it was simpler this way. Since there is no hurry in this, I will try to take that up again and see how it looks. > > > If the page is free then it shouldn't pin the memcg or any other state. > > > > Well, it is not really free, as it is not usable, is it? > > Sorry I meant to say the page is free from the memcg POV - aka no task > from the memcg is holding a reference to it. The page is not usable for > anybody, that is true but no particular memcg should pay a price for > that. This would mean that random memcgs would end up pinned for ever > without a good reason. Sure, I will re-work that. -- Oscar Salvador SUSE L3
