From owner-freebsd-alpha@FreeBSD.ORG Fri Jun 2 07:11:48 2006 Return-Path: X-Original-To: freebsd-alpha@FreeBSD.org Delivered-To: freebsd-alpha@FreeBSD.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id A7C1716A6BE; Fri, 2 Jun 2006 07:11:48 +0000 (UTC) (envelope-from wb@freebie.xs4all.nl) Received: from smtp-vbr17.xs4all.nl (smtp-vbr17.xs4all.nl [194.109.24.37]) by mx1.FreeBSD.org (Postfix) with ESMTP id 0E7E143D48; Fri, 2 Jun 2006 07:11:47 +0000 (GMT) (envelope-from wb@freebie.xs4all.nl) Received: from freebie.xs4all.nl (freebie.xs4all.nl [213.84.32.253]) by smtp-vbr17.xs4all.nl (8.13.6/8.13.6) with ESMTP id k527Bl8e092099; Fri, 2 Jun 2006 09:11:47 +0200 (CEST) (envelope-from wb@freebie.xs4all.nl) Received: from freebie.xs4all.nl (localhost [127.0.0.1]) by freebie.xs4all.nl (8.13.6/8.13.3) with ESMTP id k527BkQS005969; Fri, 2 Jun 2006 09:11:46 +0200 (CEST) (envelope-from wb@freebie.xs4all.nl) Received: (from wb@localhost) by freebie.xs4all.nl (8.13.6/8.13.6/Submit) id k527Bk7c005968; Fri, 2 Jun 2006 09:11:46 +0200 (CEST) (envelope-from wb) Date: Fri, 2 Jun 2006 09:11:46 +0200 From: Wilko Bulte To: Kris Kennaway Message-ID: <20060602071146.GA5925@freebie.xs4all.nl> References: <20060601212736.GA3380@freebie.xs4all.nl> <20060601230007.C69345@fledge.watson.org> <20060602010600.GB40143@xor.obsecurity.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20060602010600.GB40143@xor.obsecurity.org> User-Agent: Mutt/1.5.11 X-Virus-Scanned: by XS4ALL Virus Scanner Cc: freebsd-stable@FreeBSD.org, Robert Watson , freebsd-alpha@FreeBSD.org Subject: Re: 6.1-RELEASE panic / lockmgr? X-BeenThere: freebsd-alpha@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Porting FreeBSD to the Alpha List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 02 Jun 2006 07:11:49 -0000 On Thu, Jun 01, 2006 at 09:06:00PM -0400, Kris Kennaway wrote.. > On Thu, Jun 01, 2006 at 11:01:07PM +0100, Robert Watson wrote: > > > > On Thu, 1 Jun 2006, Wilko Bulte wrote: > > > > >My dual-CPU DS20 Alpha box can more or less consistently be > > >forced into a panic like: > > > > > >FreeBSD/alpha (goldrush.wbnet) (ttyd0)^ > > > > > >login: panic: lockmgr: thread 0xfffffc007d9d4a80, not exclusive lock holder > > >0xfffffc006052d260 unlocking > > >cpuid = 1 > > >KDB: enter: panic > > > > > >Trigger is a "make -j2 release". j2 seems to be needed, not seen it with > > >-j1 > > > > > >Unfortunately after printing the line with "KDB" the whole thing appears > > >to become completely catatonic :( > > > > Try putting a call to critical_enter() towards the beginning of panic(). > > Sometimes this increases the reliability of entering the debugger by > > avoiding interrupt delivery during the process of entering. If you want to > > be able to continue out, you'll need a critical_exit() at the end, but that > > generally isn't helpful for panic(). > > Also turn off debug.kdb.stop_other_cpus or whatever it is. Without > this I usually get lockups on sparc64 SMP machines. debug.kdb.stop_cpus=0 seems to be it. Will try that. thanks, Wilko -- Wilko Bulte wilko@FreeBSD.org