From owner-freebsd-current@FreeBSD.ORG Thu Jan 24 17:54:48 2008 Return-Path: <owner-freebsd-current@FreeBSD.ORG> Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id EAEDE16A419 for <freebsd-current@freebsd.org>; Thu, 24 Jan 2008 17:54:47 +0000 (UTC) (envelope-from asmrookie@gmail.com) Received: from fg-out-1718.google.com (fg-out-1718.google.com [72.14.220.156]) by mx1.freebsd.org (Postfix) with ESMTP id 785AC13C459 for <freebsd-current@freebsd.org>; Thu, 24 Jan 2008 17:54:47 +0000 (UTC) (envelope-from asmrookie@gmail.com) Received: by fg-out-1718.google.com with SMTP id 16so338465fgg.35 for <freebsd-current@freebsd.org>; Thu, 24 Jan 2008 09:54:46 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:message-id:date:from:sender:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references:x-google-sender-auth; bh=MepzIdhbEiseX8v1OK5vgUySFZRC7pPPb5wIIwlXTgk=; b=A1u9eupJ+VjnQiPaQlHNwGbxsKwgzsbusYgAMxDFrYMx6rFLPShmyoUDqHF4H2hE4am/MZ+2JAnlMBnIYym72tQ9bX1PRh1RGtwlPerdhj6SXHu82ghuo6W5m7YYoLaQvaIbJ4ZK6ywjqaMGF3SEDBJoRnKtquUR9nLzT32iP6w= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:sender:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references:x-google-sender-auth; b=Xqx3DYB0tAdjst5bGisvKiQSP3dm8IFBV9sahN/mF/tOEmg9whPJg9WhtU4ejh16K92w/uWcGJP6RATShUEET6e8S5X5Z5TthYCx9jjeD6IcPumGFq8eifLyD7J3qHVAXtavFWFbNi2keKxxeUbTP1naCCBtzAg/ltqZd6n7pzE= Received: by 10.86.99.9 with SMTP id w9mr863138fgb.44.1201197286132; Thu, 24 Jan 2008 09:54:46 -0800 (PST) Received: by 10.86.53.7 with HTTP; Thu, 24 Jan 2008 09:54:46 -0800 (PST) Message-ID: <3bbf2fe10801240954r1aa5ae1g3ce347cf4dbbbba@mail.gmail.com> Date: Thu, 24 Jan 2008 18:54:46 +0100 From: "Attilio Rao" <attilio@freebsd.org> Sender: asmrookie@gmail.com To: "Yar Tikhiy" <yar@comp.chem.msu.su> In-Reply-To: <20080124174759.GC78114@comp.chem.msu.su> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <790a9fff0801150552l542a4238ofc12efe5fdb45fc2@mail.gmail.com> <20080115143924.GB57756@deviant.kiev.zoral.com.ua> <20080124122808.GA15600@freefall.freebsd.org> <3bbf2fe10801240518i6e18b2f5w84de652d4170c95b@mail.gmail.com> <20080124174759.GC78114@comp.chem.msu.su> X-Google-Sender-Auth: 3d730bb7106d8c93 Cc: Kostik Belousov <kostikbel@gmail.com>, freebsd-current@freebsd.org Subject: Re: panic: System call lstat returning with 1 locks held X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current <freebsd-current.freebsd.org> List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>, <mailto:freebsd-current-request@freebsd.org?subject=unsubscribe> List-Archive: <http://lists.freebsd.org/pipermail/freebsd-current> List-Post: <mailto:freebsd-current@freebsd.org> List-Help: <mailto:freebsd-current-request@freebsd.org?subject=help> List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>, <mailto:freebsd-current-request@freebsd.org?subject=subscribe> X-List-Received-Date: Thu, 24 Jan 2008 17:54:48 -0000 2008/1/24, Yar Tikhiy <yar@comp.chem.msu.su>: > On Thu, Jan 24, 2008 at 02:18:56PM +0100, Attilio Rao wrote: > > 2008/1/24, Yar Tikhiy <yar@freebsd.org>: > > > On Tue, Jan 15, 2008 at 04:39:24PM +0200, Kostik Belousov wrote: > > > > > > > > I think this could be related to the recent vn_lock()/VOP_LOCK() KPI changes. > > > > Please, add DEBUG_VFS_LOCKS to the kernel config, and do the > > > > show lockedvnods > > > > from the ddb prompt when the panic occurs. The witness does not track > > > > the lockmgr locks. > > > > > > I think I'm seeing the same panic on UFS. It's rather nasty: I > > > cannot rebuild CURRENT natively due to it so I have to build it > > > under 6-STABLE. My favourite way to trigger the panic reliably is > > > running `make install' in a simple port directory, e.g., portmaster, > > > but my system also panics during daily scripts run and, as already > > > said, if trying to build world. > > > > Yar, > > as it seems reproducible for you, can you please add this patch to the tree: > > http://www.freebsd.org/~attilio/debug_tdlocks.diff > > > > compile your kernel with: > > options KTR > > options KTR_COMPILE=(KTR_SPARE2) > > options KTR_MASK=(KTR_SPARE2) > > options KTR_ENTRIES=32768 > > > > and once kernel panics, at ddb prompts do: > > > show ktr > > The first lines of the ktr output are attached. I can try to extract > all 32768 lines if needed, but they all look almost the same. I.e., > the function name and the td pointer are the same while td_locks > bump is 1 or -1. You mean the traced owner is always the same? Do you see any call to lockmgr_disown() in the code? Thanks, Attilio -- Peace can only be achieved by understanding - A. Einstein