Re: [PATCH v4] mm: Add PM_HUGE_THP_MAPPING to /proc/pid/pagemap

Mina Almasry
2021-11-10T17:50:28Z

On Tue, Nov 9, 2021 at 11:03 PM Peter Xu <peterx@redhat.com> 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.