mm/damon/vaddr: support folio of neither HPAGE_PMD_SIZE nor PAGE_SIZE

DAMON virtual address space monitoring operations set treats folios having
non-HPAGE_PMD_SIZE size as having PAGE_SIZE size.  Use the exact size of
the folio.

Link: https://lkml.kernel.org/r/20230109213335.62525-3-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/mm/damon/vaddr.c b/mm/damon/vaddr.c
index d6cb1fca17692841223cda2d9e49cff4d06c4293..c7b192006fe67231a4214fc54572dd12437b5f2f 100644 (file)
--- a/mm/damon/vaddr.c
+++ b/mm/damon/vaddr.c
@@ -475,7 +475,7 @@ regular_page:
                goto out;
        if (pte_young(*pte) || !folio_test_idle(folio) ||
                        mmu_notifier_test_young(walk->mm, addr)) {
-               *priv->folio_sz = PAGE_SIZE;
+               *priv->folio_sz = folio_size(folio);
                priv->young = true;
        }
        folio_put(folio);