From owner-freebsd-arch@FreeBSD.ORG Thu Nov 15 20:51:14 2012 Return-Path: Delivered-To: freebsd-arch@FreeBSD.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id C80914AD; Thu, 15 Nov 2012 20:51:14 +0000 (UTC) (envelope-from avg@FreeBSD.org) Received: from citadel.icyb.net.ua (citadel.icyb.net.ua [212.40.38.140]) by mx1.freebsd.org (Postfix) with ESMTP id 63A6F8FC19; Thu, 15 Nov 2012 20:51:13 +0000 (UTC) Received: from porto.starpoint.kiev.ua (porto-e.starpoint.kiev.ua [212.40.38.100]) by citadel.icyb.net.ua (8.8.8p3/ICyb-2.3exp) with ESMTP id WAA06347; Thu, 15 Nov 2012 22:51:11 +0200 (EET) (envelope-from avg@FreeBSD.org) Received: from localhost ([127.0.0.1]) by porto.starpoint.kiev.ua with esmtp (Exim 4.34 (FreeBSD)) id 1TZ6P0-000Nza-LF; Thu, 15 Nov 2012 22:51:10 +0200 Message-ID: <50A555BD.1010105@FreeBSD.org> Date: Thu, 15 Nov 2012 22:51:09 +0200 From: Andriy Gapon User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:16.0) Gecko/20121030 Thunderbird/16.0.2 MIME-Version: 1.0 To: Adrian Chadd Subject: Re: [RFQ] make witness panic an option References: <1353001175.1217.153.camel@revolution.hippie.lan> <1353009310.1217.172.camel@revolution.hippie.lan> In-Reply-To: X-Enigmail-Version: 1.4.5 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: attilio@FreeBSD.org, Ian Lepore , freebsd-arch@FreeBSD.org, freebsd-hackers@FreeBSD.org X-BeenThere: freebsd-arch@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Discussion related to FreeBSD architecture List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 15 Nov 2012 20:51:14 -0000 on 15/11/2012 22:00 Adrian Chadd said the following: > But I think my change is invaluable for development, where you want to > improve and debug the locking and lock interactions of a subsystem. My practical experience was that if you mess up one lock in one place, then it is a total mess further on. but apparently you've got a different practical experience :-) What would indeed be invaluable to _me_ - if the LOR messages also produced the stack(s) where a supposedly correct lock order was learned. -- Andriy Gapon