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. -- Michal Hocko SUSE Labs
