From 41c67e12bdcdc0ce3aacd49d1207ecbe3841e7a8 Mon Sep 17 00:00:00 2001
From: Matthew Dillon <dillon@FreeBSD.org>
Date: Fri, 12 Feb 1999 20:42:19 +0000
Subject: [PATCH]     Minor optimization to madvise() MADV_FREE to make page as
 freeable as     possible without actually unmapping it from the process.

    As of now, I declare madvise() on OBJT_DEFAULT/OBJT_SWAP objects to be
    'working and complete'.
---
 sys/vm/vm_object.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/sys/vm/vm_object.c b/sys/vm/vm_object.c
index 250f7276a69d..cf4e6b1ed483 100644
--- a/sys/vm/vm_object.c
+++ b/sys/vm/vm_object.c
@@ -61,7 +61,7 @@
  * any improvements or extensions that they make and grant Carnegie the
  * rights to redistribute these changes.
  *
- * $Id: vm_object.c,v 1.148 1999/02/08 19:00:15 dillon Exp $
+ * $Id: vm_object.c,v 1.149 1999/02/12 09:51:43 dillon Exp $
  */
 
 /*
@@ -844,9 +844,15 @@ vm_object_madvise(object, pindex, count, advise)
 			 * Specifically, we do not try to actually free
 			 * the page now nor do we try to put it in the
 			 * cache (which would cause a page fault on reuse).
+			 *
+			 * But we do make the page is freeable as we
+			 * can without actually taking the step of unmapping
+			 * it.
 			 */
 			pmap_clear_modify(VM_PAGE_TO_PHYS(m));
 			m->dirty = 0;
+			m->act_count = 0;
+			vm_page_deactivate(m);
 		}
 	}	
 }