From owner-freebsd-current@FreeBSD.ORG  Sun Oct 19 13:41:11 2003
Return-Path: <owner-freebsd-current@FreeBSD.ORG>
Delivered-To: freebsd-current@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id 13D3C16A4BF
	for <current@freebsd.org>; Sun, 19 Oct 2003 13:41:11 -0700 (PDT)
Received: from obsecurity.dyndns.org
	(adsl-63-207-60-234.dsl.lsan03.pacbell.net [63.207.60.234])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 2164543F93
	for <current@freebsd.org>; Sun, 19 Oct 2003 13:41:10 -0700 (PDT)
	(envelope-from kris@obsecurity.org)
Received: from rot13.obsecurity.org (rot13.obsecurity.org [10.0.0.5])
	by obsecurity.dyndns.org (Postfix) with ESMTP
	id E365266D74; Sun, 19 Oct 2003 13:41:08 -0700 (PDT)
Received: by rot13.obsecurity.org (Postfix, from userid 1000)
	id AF806CDA; Sun, 19 Oct 2003 13:41:08 -0700 (PDT)
Date: Sun, 19 Oct 2003 13:41:08 -0700
From: Kris Kennaway <kris@obsecurity.org>
To: Paolo Pisati <flag@libero.it>
Message-ID: <20031019204108.GB49466@rot13.obsecurity.org>
References: <20031019092147.GA39500@southcross.skynet.org>
Mime-Version: 1.0
Content-Type: multipart/signed; micalg=pgp-sha1;
	protocol="application/pgp-signature"; boundary="JP+T4n/bALQSJXh8"
Content-Disposition: inline
In-Reply-To: <20031019092147.GA39500@southcross.skynet.org>
User-Agent: Mutt/1.4.1i
cc: current@freebsd.org
Subject: Re: LOR in yesterday CURRENT
X-BeenThere: freebsd-current@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: Discussions about the use of FreeBSD-current
	<freebsd-current.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>,
	<mailto:freebsd-current-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-current>
List-Post: <mailto:freebsd-current@freebsd.org>
List-Help: <mailto:freebsd-current-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>,
	<mailto:freebsd-current-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sun, 19 Oct 2003 20:41:11 -0000


--JP+T4n/bALQSJXh8
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
Content-Transfer-Encoding: quoted-printable

On Sun, Oct 19, 2003 at 11:21:47AM +0200, Paolo Pisati wrote:
>=20
> ...lock order reversal
>  1st 0xc3142a68 vm object (vm object) @ /usr/src/sys/vm/vm_object.c:433
>  2nd 0xc102f110 system map (system map) @ /usr/src/sys/vm/vm_kern.c:328

Harmless.  From alc:

----
In general, any LOR involving a system map mutex and a vm object
mutex that has a stack trace looking like

_mtx_lock_flags()
_vm_map_lock()
kmem_malloc()
page_alloc()
slab_zalloc()
uma_zone_slab()
uma_zalloc_internal()
uma_zfree_arg()
=2E..

is not a problem.
----

> Stack backtrace:
> _mtx_lock_flags(c102f110,0,c0850fb1,148,3) at _mtx_lock_flags+0xba
> _vm_map_lock(c102f0b0,c0850fb1,148,c08feb80,2b4) at _vm_map_lock+0x36
> kmem_malloc(c102f0b0,1000,101,d2762aa8,c079a707) at kmem_malloc+0x3a
> page_alloc(c103a3c0,1000,d2762a9b,101,c083ab1b) at page_alloc+0x27
> slab_zalloc(c103a3c0,1,8,c08528ff,68c) at slab_zalloc+0xb7
> uma_zone_slab(c103a3c0,1,c08528ff,68c,0) at uma_zone_slab+0xe6
> uma_zalloc_internal(c103a3c0,0,1,0,c101f470) at uma_zalloc_internal+0x3e
> bucket_alloc(80,1,c08528ff,70b,0) at bucket_alloc+0x5e
> uma_zfree_arg(c101f3c0,d278be04,0,778,60) at uma_zfree_arg+0x2c6

Kris
--JP+T4n/bALQSJXh8
Content-Type: application/pgp-signature
Content-Disposition: inline

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.3 (FreeBSD)

iD8DBQE/kvbkWry0BWjoQKURAmb8AJ4gIzYz21RbYGqagkF0+FnVonODuQCfYhm5
Uq3KTNIH/+qmSEktQxesrsM=
=gDQM
-----END PGP SIGNATURE-----

--JP+T4n/bALQSJXh8--