From owner-freebsd-amd64@FreeBSD.ORG  Wed Mar 30 15:20:50 2005
Return-Path: <owner-freebsd-amd64@FreeBSD.ORG>
Delivered-To: freebsd-amd64@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id 2F61416A4CF
	for <freebsd-amd64@freebsd.org>; Wed, 30 Mar 2005 15:20:50 +0000 (GMT)
Received: from cs1.cs.huji.ac.il (cs1.cs.huji.ac.il [132.65.16.10])
	by mx1.FreeBSD.org (Postfix) with ESMTP id BDAEA43D5D
	for <freebsd-amd64@freebsd.org>; Wed, 30 Mar 2005 15:20:49 +0000 (GMT)
	(envelope-from danny@cs.huji.ac.il)
Received: from pampa.cs.huji.ac.il ([132.65.80.32])
	by cs1.cs.huji.ac.il with esmtp
	id 1DGezw-000P0q-DY; Wed, 30 Mar 2005 17:20:48 +0200
X-Mailer: exmh version 2.7.0 06/18/2004 with nmh-1.0.4
To: Kris Kennaway <kris@obsecurity.org>
In-Reply-To: Message from Kris Kennaway <kris@obsecurity.org> 
	<20050330144447.GA83108@xor.obsecurity.org> 
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Date: Wed, 30 Mar 2005 17:20:48 +0200
From: Danny Braniss <danny@cs.huji.ac.il>
Message-ID: <E1DGezw-000P0q-DY@cs1.cs.huji.ac.il>
cc: Jeff Roberson <jroberson@chesapeake.net>
cc: freebsd-amd64@freebsd.org
Subject: Re: panic: userret: Returning with 1 locks held. 
X-BeenThere: freebsd-amd64@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: Porting FreeBSD to the AMD64 platform <freebsd-amd64.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-amd64>,
	<mailto:freebsd-amd64-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-amd64>
List-Post: <mailto:freebsd-amd64@freebsd.org>
List-Help: <mailto:freebsd-amd64-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-amd64>,
	<mailto:freebsd-amd64-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Wed, 30 Mar 2005 15:20:50 -0000


> On Wed, Mar 30, 2005 at 11:06:11AM +0200, Danny Braniss wrote:
> > >=20
> > > --OXfL5xGRrasGEqWY
> > > Content-Type: text/plain; charset=3Dus-ascii
> > > Content-Disposition: inline
> > > Content-Transfer-Encoding: quoted-printable
> > >=20
> > > On Tue, Mar 29, 2005 at 01:09:16PM +0200, Danny Braniss wrote:
> > > > this happens at boot, current as of this morning, but can't remember
> > > > when current worked on this box, so the problem is not new,
> > > > btw, 5.4 works ok.
> > > >=3D20
> > > > the console is at
> > > > 	ftp://ftp.cs.huji.ac.il/users/danny/freebsd/console-opteron.log
> > >=20
> > > What does 'show alllocks' say?  You may need to compile in WITNESS
> > > support first.
> > >=20
> > > Kris
> >=20
> > db> show alllocks
> > db>
> 
> Ah, OK, this is a panic about lockmgr locks.  'show lockedvnods'
> instead, then for each process listed do 'tr <pid>'.  CC Jeff Roberson
> <jroberson@chesapeake.net> in the reply.  'show lockedbufs' might also
> be useful if your kernel is new enough.
> 
it seems to be the unionfs:

db> show lockedvnods
Locked vnodes

0xffffff0061bfea28: tag union, type VDIR
    usecount 3, writecount 0, refcount 3 mountedhere 0
    flags (VV_ROOT)
     lock type union: EXCL (count 1) by thread 0xffffff006209a250 (pid 104)
        vp=0xffffff0061bfea28, uppervp=0xffffff006199f410, lowervp=0xffffff003baa3a28
union: upper
0xffffff006199f410: tag ufs, type VDIR
    usecount 3, writecount 0, refcount 5 mountedhere 0
    flags (VV_ROOT)
    v_object 0xffffff007c3a52a0 ref 0 pages 0
    
        ino 2, on dev md0
union: lower
0xffffff003baa3a28: tag nfs, type VDIR
    usecount 3, writecount 0, refcount 5 mountedhere 0xffffff0031be1400
    flags ()
    v_object 0xffffff006243ce00 ref 0 pages 1
    
        fileid 47104 fsid 0x500ff01
db> tr 104
Tracing pid 104 tid 100099 td 0xffffff006209a250
kdb_enter() at kdb_enter+0x2f
panic() at panic+0x249
userret() at userret+0x131
syscall() at syscall+0x286
Xfast_syscall() at Xfast_syscall+0xa8
--- syscall (0, FreeBSD ELF64, nosys), rip = 0x8008e5218, rsp = 0x7fffffffe648, rbp = 0x7fffffffe650 ---
db> show lockedbufs
db>