Index: src/sys/uvm/uvm_amap.c
===================================================================
RCS file: /home/chs/netbsd/cvs/src/sys/uvm/uvm_amap.c,v
retrieving revision 1.123
diff -u -p -r1.123 uvm_amap.c
--- src/sys/uvm/uvm_amap.c	18 Aug 2020 10:40:20 -0000	1.123
+++ src/sys/uvm/uvm_amap.c	20 Sep 2020 01:07:23 -0000
@@ -1593,7 +1593,7 @@ amap_adjref_anons(struct vm_amap *amap, 
 	 * so that the ppref values match the current amap refcount.
 	 */
 
-	if (amap->am_ppref == NULL && !all && len != amap->am_nslot) {
+	if (amap->am_ppref == NULL) {
 		amap_pp_establish(amap, offset);
 	}
 #endif