From owner-freebsd-stable@FreeBSD.ORG  Mon May  2 14:07:01 2005
Return-Path: <owner-freebsd-stable@FreeBSD.ORG>
Delivered-To: freebsd-stable@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id D4F3B16A4CE
	for <stable@freebsd.org>; Mon,  2 May 2005 14:07:01 +0000 (GMT)
Received: from 82-168-79-254-bbxl.xdsl.tiscali.nl
	(82-168-75-155-bbxl.xdsl.tiscali.nl [82.168.75.155])
	by mx1.FreeBSD.org (Postfix) with ESMTP id D164143D55
	for <stable@freebsd.org>; Mon,  2 May 2005 14:07:00 +0000 (GMT)
	(envelope-from rene@82-168-79-254-bbxl.xdsl.tiscali.nl)
Received: from 82-168-79-254-bbxl.xdsl.tiscali.nl (localhost [127.0.0.1])
	j42E6xEm001344
	for <stable@freebsd.org>; Mon, 2 May 2005 16:06:59 +0200 (CEST)
	(envelope-from rene@82-168-79-254-bbxl.xdsl.tiscali.nl)
Received: (from rene@localhost)j42E6wtf001343
	for stable@freebsd.org; Mon, 2 May 2005 16:06:58 +0200 (CEST)
	(envelope-from rene)
Date: Mon, 2 May 2005 16:06:58 +0200
From: Rene Ladan <r.c.ladan@student.tue.nl>
To: stable@freebsd.org
Message-ID: <20050502140658.GA1273@82-168-79-254-bbxl.xdsl.tiscali.nl>
References: <20050502125104.GA987@82-168-79-254-bbxl.xdsl.tiscali.nl>
Mime-Version: 1.0
Content-Type: multipart/signed; micalg=pgp-sha1;
	protocol="application/pgp-signature"; boundary="OgqxwSJOaUobr8KG"
Content-Disposition: inline
In-Reply-To: <20050502125104.GA987@82-168-79-254-bbxl.xdsl.tiscali.nl>
User-Agent: Mutt/1.4.2.1i
Subject: Re: bpf/fxp RELENG_5 LOR
X-BeenThere: freebsd-stable@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: Production branch of FreeBSD source code
	<freebsd-stable.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>,
	<mailto:freebsd-stable-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-stable>
List-Post: <mailto:freebsd-stable@freebsd.org>
List-Help: <mailto:freebsd-stable-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>,
	<mailto:freebsd-stable-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Mon, 02 May 2005 14:07:01 -0000


--OgqxwSJOaUobr8KG
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
Content-Transfer-Encoding: quoted-printable

On Mon, May 02, 2005 at 02:51:05PM +0200, Rene Ladan wrote:
>=20
> FreeBSD 5.4-STABLE #0: Mon May  2 02:26:10 CEST 2005
>     root@82-168-79-254-bbxl.xdsl.tiscali.nl:/usr/obj/usr/src/sys/RENE
>=20
> #tcpdump
>=20
> fxp0: promiscuous mode enabled
>=20
> lock order reversal
>  1st 0xc066de80 bpf global lock (bpf global lock) @ /usr/src/sys/net/bpf.=
c:385
>  2nd 0xc14c9264 fxp0 (network driver) @ /usr/src/sys/modules/fxp/../../de=
v/fxp/if_fxp.c:2394
>=20
> fxp0: promiscuous mode disabled

Of course, to obfuscate debugging, this only happens sporadically, e.g.
when using tcpdump the first time. :(

This and related fxp LORs all point to some file and to
src/sys/dev/fxp/if_fxp.c, at places where a FXP_LOCK(sc), with sc of
type fxp_softc * is done.

from src/sys/dev/fxp/fxpvar.h:

#define	FXP_LOCK(_sc)		mtx_lock(&(_sc)->sc_mtx)

Regards,
Rene
--=20
"It won't fit on the line."
		-- me, 2001

--OgqxwSJOaUobr8KG
Content-Type: application/pgp-signature
Content-Disposition: inline

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.1 (FreeBSD)

iD8DBQFCdjQBvz70qa4zXcwRAvnyAJ4nkUxreTaBnCXRIPc9z7a1m8Ed7gCfVCCm
r6B3fMk7XdCA209PlNkeBBo=
=vjvP
-----END PGP SIGNATURE-----

--OgqxwSJOaUobr8KG--