On 24.11.20 09:43, Michal Hocko wrote: > On Mon 23-11-20 11:31:59, Pavel Tatashin wrote: > [...] >> Also, we still need to take care of the fault scenario. > > Forgot to reply to this part. I believe you mean this to be fault at gup > time, right? Then the easiest way forward would be to either add yet > another scoped flag or (maybe) better to generalize memalloc_nocma_* to > imply that the allocated memory is going to be unmovable so drop > __GFP_MOVABLE and also forbid CMA. I have to admit that I do not > remember why long term pin on CMA pages is ok to go to movable but I > strongly suspect this is just shifting problem around. Agreed. -- Thanks, David / dhildenb
