From owner-p4-projects@FreeBSD.ORG  Sat Sep 15 19:51:05 2007
Return-Path: <owner-p4-projects@FreeBSD.ORG>
Delivered-To: p4-projects@freebsd.org
Received: by hub.freebsd.org (Postfix, from userid 32767)
	id 3DEAD16A420; Sat, 15 Sep 2007 19:51:05 +0000 (UTC)
Delivered-To: perforce@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id CC10B16A419
	for <perforce@freebsd.org>; Sat, 15 Sep 2007 19:51:04 +0000 (UTC)
	(envelope-from kmacy@freebsd.org)
Received: from repoman.freebsd.org (repoman.freebsd.org
	[IPv6:2001:4f8:fff6::29])
	by mx1.freebsd.org (Postfix) with ESMTP id ADF8D13C468
	for <perforce@freebsd.org>; Sat, 15 Sep 2007 19:51:04 +0000 (UTC)
	(envelope-from kmacy@freebsd.org)
Received: from repoman.freebsd.org (localhost [127.0.0.1])
	by repoman.freebsd.org (8.14.1/8.14.1) with ESMTP id l8FJp4NS098165
	for <perforce@freebsd.org>; Sat, 15 Sep 2007 19:51:04 GMT
	(envelope-from kmacy@freebsd.org)
Received: (from perforce@localhost)
	by repoman.freebsd.org (8.14.1/8.14.1/Submit) id l8FJp4GN098162
	for perforce@freebsd.org; Sat, 15 Sep 2007 19:51:04 GMT
	(envelope-from kmacy@freebsd.org)
Date: Sat, 15 Sep 2007 19:51:04 GMT
Message-Id: <200709151951.l8FJp4GN098162@repoman.freebsd.org>
X-Authentication-Warning: repoman.freebsd.org: perforce set sender to
	kmacy@freebsd.org using -f
From: Kip Macy <kmacy@FreeBSD.org>
To: Perforce Change Reviews <perforce@freebsd.org>
Cc: 
Subject: PERFORCE change 126439 for review
X-BeenThere: p4-projects@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: p4 projects tree changes <p4-projects.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/p4-projects>,
	<mailto:p4-projects-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/p4-projects>
List-Post: <mailto:p4-projects@freebsd.org>
List-Help: <mailto:p4-projects-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/p4-projects>,
	<mailto:p4-projects-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sat, 15 Sep 2007 19:51:05 -0000

http://perforce.freebsd.org/chv.cgi?CH=126439

Change 126439 by kmacy@kmacy_home:ethng on 2007/09/15 19:50:28

	make the jumbo phys contig sysctl read only
	skip call to uma_find_refcnt if the result is not going to be used

Affected files ...

.. //depot/projects/ethng/src/sys/kern/kern_mbuf.c#5 edit

Differences ...

==== //depot/projects/ethng/src/sys/kern/kern_mbuf.c#5 (text+ko) ====

@@ -142,7 +142,7 @@
     "Maximum number of mbuf 16k jumbo clusters allowed");
 SYSCTL_STRUCT(_kern_ipc, OID_AUTO, mbstat, CTLFLAG_RD, &mbstat, mbstat,
     "Mbuf general information and statistics");
-SYSCTL_INT(_kern_ipc, OID_AUTO, jumbo_phys_contig, CTLFLAG_RW, &jumbo_phys_contig, 1,
+SYSCTL_INT(_kern_ipc, OID_AUTO, jumbo_phys_contig, CTLFLAG_RD, &jumbo_phys_contig, 1,
     "jumbo frames are physically contiguous");
 /*
  * Zones from which we allocate.
@@ -435,10 +435,11 @@
 		break;
 	}
 
-	m = (struct mbuf *)arg;
-	refcnt = uma_find_refcnt(zone, mem);
-	*refcnt = 1;			
-	if (m != NULL) {
+
+	if (arg != NULL) {
+		refcnt = uma_find_refcnt(zone, mem);
+		*refcnt = 1;			
+		m = (struct mbuf *)arg;
 		m->m_ext.ext_buf = (caddr_t)mem;
 		m->m_data = m->m_ext.ext_buf;
 		m->m_flags |= M_EXT;