From owner-freebsd-current@FreeBSD.ORG Sun Jun 10 15:59:38 2007 Return-Path: X-Original-To: freebsd-current@freebsd.org Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id E371816A41F for ; Sun, 10 Jun 2007 15:59:38 +0000 (UTC) (envelope-from rrs@cisco.com) Received: from sj-iport-3.cisco.com (sj-iport-3-in.cisco.com [171.71.176.72]) by mx1.freebsd.org (Postfix) with ESMTP id BEF0613C480 for ; Sun, 10 Jun 2007 15:59:38 +0000 (UTC) (envelope-from rrs@cisco.com) Received: from sj-dkim-1.cisco.com ([171.71.179.21]) by sj-iport-3.cisco.com with ESMTP; 10 Jun 2007 08:59:38 -0700 X-IronPort-AV: i="4.16,405,1175497200"; d="scan'208"; a="492283567:sNHT44488792" Received: from sj-core-5.cisco.com (sj-core-5.cisco.com [171.71.177.238]) by sj-dkim-1.cisco.com (8.12.11/8.12.11) with ESMTP id l5AFxcAM023721; Sun, 10 Jun 2007 08:59:38 -0700 Received: from xbh-sjc-231.amer.cisco.com (xbh-sjc-231.cisco.com [128.107.191.100]) by sj-core-5.cisco.com (8.12.10/8.12.6) with ESMTP id l5AFxctV013012; Sun, 10 Jun 2007 15:59:38 GMT Received: from xfe-sjc-211.amer.cisco.com ([171.70.151.174]) by xbh-sjc-231.amer.cisco.com with Microsoft SMTPSVC(6.0.3790.1830); Sun, 10 Jun 2007 08:59:38 -0700 Received: from [127.0.0.1] ([171.68.225.134]) by xfe-sjc-211.amer.cisco.com with Microsoft SMTPSVC(6.0.3790.1830); Sun, 10 Jun 2007 08:59:37 -0700 Message-ID: <466C205E.2000902@cisco.com> Date: Sun, 10 Jun 2007 12:01:34 -0400 From: Randall Stewart User-Agent: Mozilla/5.0 (X11; U; FreeBSD i386; en-US; rv:1.7.13) Gecko/20070601 X-Accept-Language: en-us, en MIME-Version: 1.0 To: attilio@FreeBSD.org References: <466BEA69.1010708@cisco.com> <466BFE2A.7020908@FreeBSD.org> <466BFE92.6000804@FreeBSD.org> In-Reply-To: <466BFE92.6000804@FreeBSD.org> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 10 Jun 2007 15:59:37.0838 (UTC) FILETIME=[58D8D8E0:01C7AB78] DKIM-Signature: v=0.5; a=rsa-sha256; q=dns/txt; l=1004; t=1181491178; x=1182355178; c=relaxed/simple; s=sjdkim1004; h=Content-Type:From:Subject:Content-Transfer-Encoding:MIME-Version; d=cisco.com; i=rrs@cisco.com; z=From:=20Randall=20Stewart=20 |Subject:=20Re=3A=20Don't=20know=20what=20I=20was=20doing=20but... |Sender:=20; bh=7J+LOMVOnznJTt4PauqJ6TroqNJcxDAcz13JcjF+QZo=; b=tD/S0bEbQ5FZ6D9QJXmD4w6ad+jeXhrnGoK9O4Yd6MfDqJjf+t09JCnzOz3+nbSpOG956iyT a5kpN4OXZTAntBZo66UzrxviYBJh4CUf3Kxepxm/eZS3HZF4nUGGHR89ZK6M1iiLvaygLuNNbJ ISZOQAWgxXhK9EuXKzuDSLNTU=; Authentication-Results: sj-dkim-1; header.From=rrs@cisco.com; dkim=pass (sig from cisco.com/sjdkim1004 verified; ); Cc: freebsd-current@FreeBSD.org Subject: Re: Don't know what I was doing but... X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 10 Jun 2007 15:59:39 -0000 Attilio Rao wrote: > Attilio Rao wrote: > >> Randall Stewart wrote: >> >>> Hi all: >>> >>> I have a fairly recent current.. like yesterday I think.. and >>> I just saw this tumble out (I usually run with witness and invariants >>> on in my laptop now :-D) >>> >>> lock order reversal: >>> 1st 0xc0b79f70 sched lock (sched lock) @ kern/sched_4bsd.c:846 >>> 2nd 0xc0bec658 descriptor tables (descriptor tables) @ >>> i386/i386/sys_machdep.c:363 >> >> >> Mm, since dt_lock is a leaf mutex, the opposite case seems quite >> impossible, so I expect this would be the result of some other bug... >> if next cvsup doesn't fix it, just let me know and I will look into >> this. > > > More precisely, I'd like to better study effects recent thread_lock > introduction had on witness rules. > > Attilio > I did a sup this AM... I will re-do that then cvs update and build... R -- Randall Stewart NSSTG - Cisco Systems Inc. 803-345-0369 803-317-4952 (cell)