On Tue 30-10-18 18:00:23, Vlastimil Babka wrote: [...] > I suspect there are lots of short-lived processes, so these are probably > rapidly recycled and not causing compaction. It also seems to be pgd > allocation (2 pages due to PTI) not kernel stack? I guess you are right. I have misread order=2 yesterday. order=1 stack would be quite unexpected. -- Michal Hocko SUSE Labs