From owner-freebsd-questions@FreeBSD.ORG Wed Aug 4 14:43:15 2004 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id EC55516A4CF for ; Wed, 4 Aug 2004 14:43:15 +0000 (GMT) Received: from mail.dti.supsi.ch (mail.dti.supsi.ch [193.5.153.13]) by mx1.FreeBSD.org (Postfix) with ESMTP id 28B4D43D2D for ; Wed, 4 Aug 2004 14:43:15 +0000 (GMT) (envelope-from roberto.nunnari@supsi.ch) Received: from supsi.ch (pcm2027.dti.supsi.ch [193.5.152.27]) by mail.dti.supsi.ch (8.11.6/8.11.6) with ESMTP id i74EhDK30498; Wed, 4 Aug 2004 16:43:13 +0200 Message-ID: <4110F602.8020809@supsi.ch> Date: Wed, 04 Aug 2004 16:43:14 +0200 From: Roberto Nunnari User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.4) Gecko/20030624 X-Accept-Language: en-us, en MIME-Version: 1.0 To: Simon Barner References: <4110E94D.2060803@supsi.ch> <20040804135437.GA22118@zi025.glhnet.mhn.de> In-Reply-To: <20040804135437.GA22118@zi025.glhnet.mhn.de> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit cc: freebsd-questions@freebsd.org Subject: Re: strange kernel messages.. X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 04 Aug 2004 14:43:16 -0000 Thank you Simon. Simon Barner wrote: > Roberto Nunnari wrote: > >>Hello. >> >>Please send replies also to my mailbox, as I'm not on this list. >> >>Can anybody tell me what are these messages about? Are them >>just informational or do I have to worry? >> >>Aug 2 18:23:59 web kernel: lock order reversal >>Aug 2 18:23:59 web kernel: 1st 0xc07066e0 UMA lock (UMA lock) @ >>/usr/src/sys/vm/uma_core.c:1200 >>Aug 2 18:23:59 web kernel: 2nd 0xc0c31100 system map (system map) @ >>/usr/src/sys/vm/vm_map.c:2210 >>Aug 2 19:12:21 web kernel: lock order reversal >>Aug 2 19:12:21 web kernel: 1st 0xc8c1c39c vm object (vm object) @ >>/usr/src/sys/vm/swap_pager.c:1323 >>Aug 2 19:12:21 web kernel: 2nd 0xc0705b80 swap_pager swhash (swap_pager >>swhash) @ /usr/src/sys/vm/swap_pager.c:1838 >>Aug 2 19:12:21 web kernel: 3rd 0xc6853108 vm object (vm object) @ >>/usr/src/sys/vm/uma_core.c:873 > > > This is a so-called lock order reversal (LOR). To learn more about LORs > in general and specifically about the one you are seeing, please see > here: > > http://sources.zabbadoz.net/freebsd/lor.html --> # 007 > > Simon > -- Roberto Nunnari -software engineer- mailto:roberto.nunnari@supsi.ch Scuola Universitaria Professionale della Svizzera Italiana Dipartimento Tecnologie Innovative http://www.dti.supsi.ch SUPSI-DTI Via Cantonale tel: +41-91-6108561 6928 Manno """ fax: +41-91-6108570 Switzerland (o o) =======================oOO==(_)==OOo========================