diff mbox series

[PATCHv2,01/11] mm/migrate: Transfer PG_dropbehind to the new folio

Message ID 20250115093135.3288234-2-kirill.shutemov@linux.intel.com (mailing list archive)
State New
Headers show
Series Get rid of PG_reclaim and rename PG_dropbehind | expand

Commit Message

Kirill A. Shutemov Jan. 15, 2025, 9:31 a.m. UTC 
Do not lose the flag on page migration.

Ideally, these folios should be freed instead of migration. But it
requires to find right spot do this and proper testing.

Transfer the flag for now.

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
---
 mm/migrate.c | 4 ++++
 1 file changed, 4 insertions(+)
diff mbox series

Patch

diff --git a/mm/migrate.c b/mm/migrate.c
index caadbe393aa2..690efa064bee 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -682,6 +682,10 @@  void folio_migrate_flags(struct folio *newfolio, struct folio *folio)
 	if (folio_test_dirty(folio))
 		folio_set_dirty(newfolio);
 
+	/* TODO: free the folio on migration? */
+	if (folio_test_dropbehind(folio))
+		folio_set_dropbehind(newfolio);
+
 	if (folio_test_young(folio))
 		folio_set_young(newfolio);
 	if (folio_test_idle(folio))