diff --git a/mm/vmscan.c b/mm/vmscan.c
index 289121e76753..7554adc9c824 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -1257,6 +1257,20 @@ retry:
 
 			if (folio_test_pmd_mappable(folio))
 				flags |= TTU_SPLIT_HUGE_PMD;
+			/*
+			 * Without TTU_SYNC, try_to_unmap will only begin to
+			 * hold PTL from the first present PTE within a large
+			 * folio. Some initial PTEs might be skipped due to
+			 * races with parallel PTE writes in which PTEs can be
+			 * cleared temporarily before being written new present
+			 * values. This will lead to a large folio is still
+			 * mapped while some subpages have been partially
+			 * unmapped after try_to_unmap; TTU_SYNC helps
+			 * try_to_unmap acquire PTL from the first PTE,
+			 * eliminating the influence of temporary PTE values.
+			 */
+			if (folio_test_large(folio) && list_empty(&folio->_deferred_list))
+				flags |= TTU_SYNC;
 
 			try_to_unmap(folio, flags);
 			if (folio_mapped(folio)) {