With the introduction of large folios for anonymous memory, we would like to be able to split them when they have unmapped subpages, in order to free those unused pages under memory pressure. So remove the artificial requirement that the large folio needed to be at least PMD-sized. Signed-off-by: Ryan Roberts <ryan.roberts@xxxxxxx> Reviewed-by: Yu Zhao <yuzhao@xxxxxxxxxx> Reviewed-by: Yin Fengwei <fengwei.yin@xxxxxxxxx> --- mm/rmap.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/rmap.c b/mm/rmap.c index 82ef5ba363d1..bbcb2308a1c5 100644 --- a/mm/rmap.c +++ b/mm/rmap.c @@ -1474,7 +1474,7 @@ void page_remove_rmap(struct page *page, struct vm_area_struct *vma, * page of the folio is unmapped and at least one page * is still mapped. */ - if (folio_test_pmd_mappable(folio) && folio_test_anon(folio)) + if (folio_test_large(folio) && folio_test_anon(folio)) if (!compound || nr < nr_pmdmapped) deferred_split_folio(folio); } -- 2.25.1
