From 62dcdc109bff680aae36f91b62d491c87ef2208e Mon Sep 17 00:00:00 2001
From: thorpej <thorpej@NetBSD.org>
Date: Wed, 7 Jul 1999 21:04:22 +0000
Subject: [PATCH] In the PGO_FREE case of uvm_map_clean()'s amap cleaning, skip
 wired pages.

XXX This should be handled better in the future, probably by marking the
XXX page as released, and making uvm_pageunwire() free the page when
XXX the wire count on a released page reaches zero.
---
 sys/uvm/uvm_map.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/sys/uvm/uvm_map.c b/sys/uvm/uvm_map.c
index 9215f40c00e7..63e43da6266f 100644
--- a/sys/uvm/uvm_map.c
+++ b/sys/uvm/uvm_map.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: uvm_map.c,v 1.61 1999/07/07 06:02:22 thorpej Exp $	*/
+/*	$NetBSD: uvm_map.c,v 1.62 1999/07/07 21:04:22 thorpej Exp $	*/
 
 /* 
  * Copyright (c) 1997 Charles D. Cranor and Washington University.
@@ -2520,6 +2520,11 @@ uvm_map_clean(map, start, end, flags)
 				continue;
 
 			case PGO_FREE:
+				/* XXX skip the page if it's wired */
+				if (pg->wire_count != 0) {
+					simple_unlock(&anon->an_lock);
+					continue;
+				}
 				amap_unadd(&entry->aref, offset);
 				refs = --anon->an_ref;
 				simple_unlock(&anon->an_lock);