On Tue, Nov 9, 2021 at 11:03 PM Peter Xu <peterx@xxxxxxxxxx> wrote: > > The ending "_MAPPING" seems redundant to me, how about just call it "PM_THP" or > "PM_HUGE" (as THP also means HUGE already)? > So I want to make it clear that the flag is set only when the page is PMD mappend and is a THP (not hugetlbfs or some other PMD device mapping). PM_THP would imply the flag is set only if the underlying page is THP without regard to whether it's actually PMD mapped or not.