On Wed 17-10-18 01:43:00, Kuo-Hsin Yang wrote: > The i915 driver use shmemfs to allocate backing storage for gem objects. > These shmemfs pages can be pinned (increased ref count) by > shmem_read_mapping_page_gfp(). When a lot of pages are pinned, vmscan > wastes a lot of time scanning these pinned pages. Mark these pinned > pages as unevictable to speed up vmscan. I would squash the two patches into the single one. One more thing though. One more thing to be careful about here. Unless I miss something such a page is not migrateable so it shouldn't be allocated from a movable zone. Does mapping_gfp_constraint contains __GFP_MOVABLE? If yes, we want to drop it as well. Other than that the patch makes sense with my very limited knowlege of the i915 code of course. -- Michal Hocko SUSE Labs
