From owner-freebsd-current@FreeBSD.ORG Sun Apr 4 14:20:21 2004 Return-Path: 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 A865516A4CF for ; Sun, 4 Apr 2004 14:20:21 -0700 (PDT) Received: from smtp0.server.rpi.edu (smtp0.server.rpi.edu [128.113.53.41]) by mx1.FreeBSD.org (Postfix) with ESMTP id 51CA043D4C for ; Sun, 4 Apr 2004 14:20:21 -0700 (PDT) (envelope-from drosih@rpi.edu) Received: from [128.113.24.47] (gilead.netel.rpi.edu [128.113.24.47]) by smtp0.server.rpi.edu (8.12.8/8.12.8) with ESMTP id i34LKGBM031227; Sun, 4 Apr 2004 17:20:17 -0400 Mime-Version: 1.0 X-Sender: drosih@mail.rpi.edu Message-Id: In-Reply-To: <20040404224036.K37637@cvs.imp.ch> References: <20040404224036.K37637@cvs.imp.ch> Date: Sun, 4 Apr 2004 17:20:15 -0400 To: Martin Blapp , current@freebsd.org From: Garance A Drosihn Content-Type: text/plain; charset="us-ascii" ; format="flowed" X-Scanned-By: CanIt (www . canit . ca) cc: dillon@backplane.com Subject: Re: Possible race in the filesystem code (softupdates) ? X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.1 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, 04 Apr 2004 21:20:21 -0000 At 10:55 PM +0200 4/4/04, Martin Blapp wrote: >Hi, > >During testing I found that the following procedure is pretty >dangerous and leads sometimes to a panic(): For the times when it does not cause a panic, does it cause any other problems? Ie, would it be better to say "procedure is pretty dangerous *because* it sometimes causes a panic"? Or is there some other problem in addition to the possible panic? >I'm trying to reproduce it tomorrow for a useful dump. I had it >happen twice but was not able to take any notices because it >happenend on a productive server. I can exclude any hardware >problems. We use current from a week ago. What kind of hardware are you doing this on? Is it multi-CPU? Does it have a lot of RAM? (I am just curious...) Once you have a dump, you might want to include Kirk McKusick on a message with a pointer to the dump. I don't know how often he reads freebsd-current. -- Garance Alistair Drosehn = gad@gilead.netel.rpi.edu Senior Systems Programmer or gad@freebsd.org Rensselaer Polytechnic Institute or drosih@rpi.edu