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-rw-r--r--mm/vmscan.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 726f5ce366da..4ea23807d23f 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -1435,7 +1435,10 @@ static void folio_check_dirty_writeback(struct folio *folio,
/*
* Anonymous pages are not handled by flushers and must be written
- * from reclaim context. Do not stall reclaim based on them
+ * from reclaim context. Do not stall reclaim based on them.
+ * MADV_FREE anonymous pages are put into inactive file list too.
+ * They could be mistakenly treated as file lru. So further anon
+ * test is needed.
*/
if (!folio_is_file_lru(folio) ||
(folio_test_anon(folio) && !folio_test_swapbacked(folio))) {