From owner-freebsd-current@FreeBSD.ORG  Thu Nov 27 16:16:11 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 B1A9A16A4CE
	for <current@FreeBSD.org>; Thu, 27 Nov 2003 16:16:11 -0800 (PST)
Received: from aldan.algebra.com (aldan.algebra.com [216.254.65.224])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 8248743FB1
	for <current@FreeBSD.org>; Thu, 27 Nov 2003 16:16:10 -0800 (PST)
	(envelope-from mi@aldan.algebra.com)
Received: from aldan.algebra.com (mi@localhost [127.0.0.1])
	by aldan.algebra.com (8.12.10/8.12.10) with ESMTP id hAS0G6sJ073959
	(version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO)
	for <current@FreeBSD.org>; Thu, 27 Nov 2003 19:16:08 -0500 (EST)
	(envelope-from mi@aldan.algebra.com)
Received: (from mi@localhost)
	by aldan.algebra.com (8.12.10/8.12.10/Submit) id hAS0G5m2073958
	for current@FreeBSD.org; Thu, 27 Nov 2003 19:16:05 -0500 (EST)
	(envelope-from mi)
Date: Thu, 27 Nov 2003 19:16:05 -0500 (EST)
From: Mikhail Teterin <mi@aldan.algebra.com>
Message-Id: <200311280016.hAS0G5m2073958@aldan.algebra.com>
To: current@FreeBSD.org
X-Face: %UW#n0|w>ydeGt/b@1-.UFP=K^~-:0f#O:D7w<gv/&E-lL7twZCT8B~/PA4|\t$ti+22K">
	hJ5G_<5143Bb3kOIs9XpX+"V+~$adGP:J|SLieM31VIhqXeLBli"<kcG^EOVih
	y+z3/UR{6SCQ
Subject: lock order reversal is 5.2-BETA Nov 26
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: Fri, 28 Nov 2003 00:16:11 -0000

It did not crash or anything, but the following is printed on
console now (addresses ommitted):

	lock order reversal
	 1st ... UMA lock (UMA lock) @ /usr/src/sys/vm/uma_core.c:1201
	 2nd ... system map (system map) @ /usr/src/sys/vm/vm_map.c:2210
	Stack backtrace:
	backtrace(....) at backtrace+0x17
	witness_lock(....) at wintess_lock+0x672
	_mtx_lock_flags(....) at _mtx_lock_flags+0xba
	_vm_map_lock(....) at _vm_map_lock+0x36
	vm_map_remove(....) at vm_map_remove+0x30
	kmem_free(....) at kmem_free+0x32
	page_free(....) at page_free+0x3b
	zone_drain(....) at zone_drain+0x2cf
	zone_foreach(....) at zone_foreach+0x45
	uma_reclaim(....) at uma_reclaim+0x17
	vm_pageout_scan(....) at vm_pageout_scan+0x148
	vm_pageout(....) at vm_pageout+0x31b
	fork_exit(....) at fork_exit+0xb4
	fork_trampoline(....) at fork_trampoline+0x8
	--- trap 0x1, eip = 0, esp = ....., ebp = 0 ---

Hope, this is usefull. A new kernel -- from today's sources -- is being
compiled now.

	-mi