From owner-freebsd-stable@FreeBSD.ORG Thu Feb 25 07:33:19 2010 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id BFEE0106566B for ; Thu, 25 Feb 2010 07:33:19 +0000 (UTC) (envelope-from jdc@koitsu.dyndns.org) Received: from qmta11.emeryville.ca.mail.comcast.net (qmta11.emeryville.ca.mail.comcast.net [76.96.27.211]) by mx1.freebsd.org (Postfix) with ESMTP id 734F58FC1A for ; Thu, 25 Feb 2010 07:33:19 +0000 (UTC) Received: from omta22.emeryville.ca.mail.comcast.net ([76.96.30.89]) by qmta11.emeryville.ca.mail.comcast.net with comcast id m7S41d0021vN32cAB7VzQR; Thu, 25 Feb 2010 07:29:59 +0000 Received: from koitsu.dyndns.org ([98.248.46.159]) by omta22.emeryville.ca.mail.comcast.net with comcast id m7bq1d00C3S48mS8i7brYP; Thu, 25 Feb 2010 07:35:51 +0000 Received: by icarus.home.lan (Postfix, from userid 1000) id 08B7B1E301A; Wed, 24 Feb 2010 23:33:18 -0800 (PST) Date: Wed, 24 Feb 2010 23:33:18 -0800 From: Jeremy Chadwick To: freebsd-stable@freebsd.org Message-ID: <20100225073317.GA82327@icarus.home.lan> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.20 (2009-06-14) Subject: Re: vfs deadlock during panic? X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 25 Feb 2010 07:33:19 -0000 On Wed, Feb 24, 2010 at 10:36:14PM -0800, Jake Holland wrote: > I'm running today's stable/8 -r 204294 on a Dell r610 (2 processors with > 4 cores per processor). I have turned on WITNESS and DEBUG_VFS_LOCKS, > because I've been trying to troubleshoot an occasional hang during > panic, and I think I have reason to believe a vfs deadlock is occurring. > Some details below. > {snip} All the backtraces indicate UFS snapshots are being used, as in you're doing dump -L or mksnap_ffs. Is that the case? -- | Jeremy Chadwick jdc@parodius.com | | Parodius Networking http://www.parodius.com/ | | UNIX Systems Administrator Mountain View, CA, USA | | Making life hard for others since 1977. PGP: 4BD6C0CB |