On Wed, Oct 9, 2019 at 8:27 AM Kirill A. Shutemov <kirill@xxxxxxxxxxxxx> wrote:Nope, it handles the hugepages by ignoring them, since they should be read-only, but if pmd_entry() was called with something else than a hugepage, then it requests the fallback, but never a split.
Do we have any current user that expect split_huge_pmd() in this scenario.No. There are no current users of the pmd callback and the pte
callback at all, that I could find.
But it looks like the new drm use does want a "I can't handle the
hugepage, please split it and I'll fo the ptes instead".