On Fri, Feb 26, 2021 at 02:17:18AM -0700, Yu Zhao wrote: > All places but one test, set or clear PG_active and PG_unevictable on > small or head pages. Use compound_head() explicitly for that singleton > so the rest can rid of redundant compound_head(). How do you know it's only one place? I really wish you'd work with me on folios. They make the compiler prove that it's not a tail page.