From owner-freebsd-current@FreeBSD.ORG  Wed Oct  5 02:49:05 2005
Return-Path: <owner-freebsd-current@FreeBSD.ORG>
X-Original-To: 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 2225716A41F;
	Wed,  5 Oct 2005 02:49:05 +0000 (GMT)
	(envelope-from thompsa@freebsd.org)
Received: from heff.fud.org.nz (60-234-149-201.bitstream.orcon.net.nz
	[60.234.149.201])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 915C443D76;
	Wed,  5 Oct 2005 02:49:04 +0000 (GMT)
	(envelope-from thompsa@freebsd.org)
Received: by heff.fud.org.nz (Postfix, from userid 1001)
	id 535EC1CCD4; Wed,  5 Oct 2005 15:49:03 +1300 (NZDT)
Date: Wed, 5 Oct 2005 15:49:03 +1300
From: Andrew Thompson <thompsa@freebsd.org>
To: FreeBSD Current <current@freebsd.org>
Message-ID: <20051005024903.GA72743@heff.fud.org.nz>
Mail-Followup-To: Andrew Thompson <thompsa@freebsd.org>,
	FreeBSD Current <current@freebsd.org>,
	Brooks Davis <brooks@freebsd.org>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
User-Agent: Mutt/1.4.2.1i
Cc: Brooks Davis <brooks@freebsd.org>
Subject: panic: ifc_free_unit: bit is already cleared
X-BeenThere: freebsd-current@freebsd.org
X-Mailman-Version: 2.1.5
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: Wed, 05 Oct 2005 02:49:05 -0000

Hi,

I have found a repeatable panic with network device cloning, unfortunatly I am
unable to dump on this box. This is sparc64 with a 2 day old current.


[root@dev]# kldload if_vlan
[root@dev]# for i in `jot 100 1`; do
for> ifconfig xl0.$i create
for> done
[root@dev]# kldunload if_vlan
panic: ifc_free_unit: bit is already cleared
cpuid = 0
KDB: enter: panic
[thread pid 4527 tid 100089 ]
Stopped at      kdb_enter+0x3c: ta              %xcc, 1
db> trace
Tracing pid 4527 tid 100089 td 0xfffff8000ab8e4c0
panic() at panic+0x164
ifc_free_unit() at ifc_free_unit+0x50
vlan_clone_destroy() at vlan_clone_destroy+0x8c
vlan_modevent() at vlan_modevent+0x44
module_unload() at module_unload+0x60
linker_file_unload() at linker_file_unload+0x7c
kern_kldunload() at kern_kldunload+0x84
kldunloadf() at kldunloadf+0x1c
syscall() at syscall+0x2dc
-- syscall (444, FreeBSD ELF64, kldunloadf) %o7=0x100b58 --
userland() at 0x40391348
user trace: trap %o7=0x100b58
pc 0x40391348, sp 0x7fdffffdde1
pc 0x100894, sp 0x7fdffffe2c1
pc 0x40209474, sp 0x7fdffffe381
done
db>