Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.

===================================================================
RCS file: /ftp/cvs/cvsroot/src/sys/uvm/uvm_pdpolicy_clock.c,v
rcsdiff: /ftp/cvs/cvsroot/src/sys/uvm/uvm_pdpolicy_clock.c,v: warning: Unknown phrases like `commitid ...;' are present.
retrieving revision 1.14.6.1
retrieving revision 1.15
diff -u -p -r1.14.6.1 -r1.15
--- src/sys/uvm/uvm_pdpolicy_clock.c	2012/02/18 07:36:01	1.14.6.1
+++ src/sys/uvm/uvm_pdpolicy_clock.c	2012/01/27 19:48:42	1.15
@@ -1,4 +1,4 @@
-/*	$NetBSD: uvm_pdpolicy_clock.c,v 1.14.6.1 2012/02/18 07:36:01 mrg Exp $	*/
+/*	$NetBSD: uvm_pdpolicy_clock.c,v 1.15 2012/01/27 19:48:42 para Exp $	*/
 /*	NetBSD: uvm_pdaemon.c,v 1.72 2006/01/05 10:47:33 yamt Exp $	*/
 
 /*
@@ -69,7 +69,7 @@
 #else /* defined(PDSIM) */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: uvm_pdpolicy_clock.c,v 1.14.6.1 2012/02/18 07:36:01 mrg Exp $");
+__KERNEL_RCSID(0, "$NetBSD: uvm_pdpolicy_clock.c,v 1.15 2012/01/27 19:48:42 para Exp $");
 
 #include <sys/param.h>
 #include <sys/proc.h>
@@ -419,8 +419,23 @@ uvmpdpol_reinit(void)
 bool
 uvmpdpol_needsscan_p(void)
 {
+	vmem_size_t kva_size;
+	vmem_size_t kva_free;
 
-	return pdpol_state.s_inactive < pdpol_state.s_inactarg;
+	kva_size = vmem_size(kmem_arena, VMEM_FREE|VMEM_ALLOC);
+	kva_free = vmem_size(kmem_arena, VMEM_FREE);
+
+	if (kva_free < (kva_size / 10)) {
+		return true;
+	}
+
+	if (pdpol_state.s_inactive < pdpol_state.s_inactarg) {
+		return true;
+	}
+		if (pdpol_state.s_inactive < pdpol_state.s_inactarg) {
+		return true;
+	}
+	return false;
 }
 
 void