On Mon, Oct 22, 2018 at 10:33:22AM +0200, Michal Hocko wrote: > Cc som more people. > > I am wondering why 172b06c32b94 ("mm: slowly shrink slabs with a > relatively small number of objects") has been backported to the stable > tree when not marked that way. Put that aside it seems likely that the > upstream kernel will have the same issue I suspect. Roman, could you > have a look please? Sure, already looking... Spock provided some useful details, and I think, I know what's happening... Hope to propose a solution soon. RE backporting: I'm slightly surprised that only one patch of the memcg reclaim fix series has been backported. Either all or none makes much more sense to me. Thanks!