From d0686727c032ebf1dab91f097a36668b4f289f96 Mon Sep 17 00:00:00 2001
From: David Greenman <dg@FreeBSD.org>
Date: Mon, 20 Feb 1995 14:00:50 +0000
Subject: [PATCH] Don't allow act_count to exceed ACT_MAX when bumping it up.
 Small optimization to vm_page_bits().

Submitted by:	John Dyson
---
 sys/vm/vm_page.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/sys/vm/vm_page.c b/sys/vm/vm_page.c
index e0a047acae88..9218fefd8a31 100644
--- a/sys/vm/vm_page.c
+++ b/sys/vm/vm_page.c
@@ -34,7 +34,7 @@
  * SUCH DAMAGE.
  *
  *	from: @(#)vm_page.c	7.4 (Berkeley) 5/7/91
- *	$Id: vm_page.c,v 1.18 1995/02/02 09:09:05 davidg Exp $
+ *	$Id: vm_page.c,v 1.19 1995/02/20 13:58:14 davidg Exp $
  */
 
 /*
@@ -1002,7 +1002,7 @@ vm_page_activate(m)
 		TAILQ_INSERT_TAIL(&m->object->memq, m, listq);
 		if (m->act_count < 5)
 			m->act_count = 5;
-		else
+		else if( m->act_count < ACT_MAX)
 			m->act_count += 1;
 		cnt.v_active_count++;
 	}
@@ -1055,6 +1055,8 @@ vm_page_bits(int base, int size)
 {
 	u_short chunk;
 
+	if( (base == 0) && (size == PAGE_SIZE))
+		return VM_PAGE_BITS_ALL;
 	size = (size + DEV_BSIZE - 1) & ~(DEV_BSIZE - 1);
 	base = (base % PAGE_SIZE) / DEV_BSIZE;
 	chunk = vm_page_dev_bsize_chunks[size / DEV_BSIZE];