1 files changed, 6 insertions, 0 deletions
diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 229ab8c75a6b..3f3267af4e3b 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -2401,6 +2401,12 @@ static void __split_huge_page_tail(struct page *head, int tail,
 
 	page_tail->index = head->index + tail;
 	page_cpupid_xchg_last(page_tail, page_cpupid_last(head));
+
+	/*
+	 * always add to the tail because some iterators expect new
+	 * pages to show after the currently processed elements - e.g.
+	 * migrate_pages
+	 */
 	lru_add_page_tail(head, page_tail, lruvec, list);
 }