diff mbox series

[RFC,v2,07/17] mm: Allow deferred splitting of arbitrary large anon folios

Message ID 20230414130303.2345383-8-ryan.roberts@arm.com (mailing list archive)
State New
Headers show
Series variable-order, large folios for anonymous memory | expand

Commit Message

Ryan Roberts April 14, 2023, 1:02 p.m. UTC 
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@arm.com>
---
 mm/rmap.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--
2.25.1
diff mbox series

Patch

diff --git a/mm/rmap.c b/mm/rmap.c
index d563d979c005..5148a484f915 100644
--- a/mm/rmap.c
+++ b/mm/rmap.c
@@ -1470,7 +1470,7 @@  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);
 	}