--- linux-4.9.37/mm/page_alloc.c	2017-07-12 16:42:41.000000000 +0300
+++ linux-4.9.y/mm/page_alloc.c	2021-06-07 13:01:34.000000000 +0300
@@ -7335,7 +7335,7 @@
 
 	/* Make sure the range is really isolated. */
 	if (test_pages_isolated(outer_start, end, false)) {
-		pr_info("%s: [%lx, %lx) PFNs busy\n",
+		pr_warn_once("%s: [%lx, %lx) PFNs busy\n",
 			__func__, outer_start, end);
 		ret = -EBUSY;
 		goto done;