Do not decrement the swap counter if the anon is associated to a "bad" slot.

When such anon is freed its content is obviously not living in swap.

ok miod@

diff --git a/sys/uvm/uvm_anon.c b/sys/uvm/uvm_anon.c
index abb3e8d..4c4bf8e 100644 (file)
--- a/sys/uvm/uvm_anon.c
+++ b/sys/uvm/uvm_anon.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: uvm_anon.c,v 1.56 2023/09/02 08:24:40 mpi Exp $       */
+/*     $OpenBSD: uvm_anon.c,v 1.57 2023/10/27 19:13:51 mpi Exp $       */
 /*     $NetBSD: uvm_anon.c,v 1.10 2000/11/25 06:27:59 chs Exp $        */
 
 /*
@@ -116,7 +116,7 @@ uvm_anfree_list(struct vm_anon *anon, struct pglist *pgl)
                        uvm_unlock_pageq();     /* free the daemon */
                }
        } else {
-               if (anon->an_swslot != 0) {
+               if (anon->an_swslot != 0 && anon->an_swslot != SWSLOT_BAD) {
                        /* This page is no longer only in swap. */
                        KASSERT(uvmexp.swpgonly > 0);
                        atomic_dec_int(&uvmexp.swpgonly);