From: Kuan-Ying Lee <Kuan-Ying.Lee@xxxxxxxxxxxx> commit aa1e6a932ca652a50a5df458399724a80459f521 upstream. If we call folio_isolate_lru() successfully, we will get return value 0. We need to add this folio to the movable_pages_list. Link: https://lkml.kernel.org/r/20230131063206.28820-1-Kuan-Ying.Lee@xxxxxxxxxxxx Fixes: 67e139b02d99 ("mm/gup.c: refactor check_and_migrate_movable_pages()") Signed-off-by: Kuan-Ying Lee <Kuan-Ying.Lee@xxxxxxxxxxxx> Reviewed-by: Alistair Popple <apopple@xxxxxxxxxx> Acked-by: David Hildenbrand <david@xxxxxxxxxx> Reviewed-by: Baolin Wang <baolin.wang@xxxxxxxxxxxxxxxxx> Cc: Andrew Yang <andrew.yang@xxxxxxxxxxxx> Cc: Chinwen Chang <chinwen.chang@xxxxxxxxxxxx> Cc: John Hubbard <jhubbard@xxxxxxxxxx> Cc: Matthias Brugger <matthias.bgg@xxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- mm/gup.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/mm/gup.c +++ b/mm/gup.c @@ -1978,7 +1978,7 @@ static unsigned long collect_longterm_un drain_allow = false; } - if (!folio_isolate_lru(folio)) + if (folio_isolate_lru(folio)) continue; list_add_tail(&folio->lru, movable_page_list);
