On Tue 17-01-23 15:16:30, Minchan Kim wrote: > The reclaim_pages MADV_PAGEOUT uses needs to return the number of > pages paged-out successfully, not only the number of reclaimed pages > in the operation because those pages paged-out successfully will be > reclaimed easily at the memory pressure due to asynchronous writeback > rotation(i.e., PG_reclaim with folio_rotate_reclaimable). > > This patch renames the reclaim_pages with paging_out(with hope that > it's clear from operation point of view) and then adds a additional > stat in reclaim_stat to represent the number of paged-out but kept > in the memory for rotation on writeback completion. > > With that stat, madvise_pageout can know how many pages were paged-out > successfully as well as reclaimed. The return value will be used for > statistics in next patch. I really fail to see the reson for the rename and paging_out doesn't even make much sense as a name TBH. -- Michal Hocko SUSE Labs
