On 6/27/23 01:14, Ryan Roberts wrote: > 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: Yin Fengwei <fengwei.yin@xxxxxxxxx> Regards Yin, Fengwei > --- > mm/rmap.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/mm/rmap.c b/mm/rmap.c > index ac1d93d43f2b..3d11c5fb6090 100644 > --- a/mm/rmap.c > +++ b/mm/rmap.c > @@ -1567,7 +1567,7 @@ 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); > }
