From owner-freebsd-stable@FreeBSD.ORG Wed Jan 13 17:37:35 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 137AF106566B for ; Wed, 13 Jan 2010 17:37:35 +0000 (UTC) (envelope-from jdc@koitsu.dyndns.org) Received: from qmta03.emeryville.ca.mail.comcast.net (qmta03.emeryville.ca.mail.comcast.net [76.96.30.32]) by mx1.freebsd.org (Postfix) with ESMTP id EF32C8FC08 for ; Wed, 13 Jan 2010 17:37:34 +0000 (UTC) Received: from omta18.emeryville.ca.mail.comcast.net ([76.96.30.74]) by qmta03.emeryville.ca.mail.comcast.net with comcast id V5Ze1d0081bwxycA35dbQB; Wed, 13 Jan 2010 17:37:35 +0000 Received: from koitsu.dyndns.org ([98.248.46.159]) by omta18.emeryville.ca.mail.comcast.net with comcast id V5dp1d00P3S48mS8e5dr3d; Wed, 13 Jan 2010 17:37:52 +0000 Received: by icarus.home.lan (Postfix, from userid 1000) id B6F4C1E301C; Wed, 13 Jan 2010 09:37:31 -0800 (PST) Date: Wed, 13 Jan 2010 09:37:31 -0800 From: Jeremy Chadwick To: freebsd-stable@freebsd.org Message-ID: <20100113173731.GA33254@icarus.home.lan> References: <4B4DF85F.8070303@acm.poly.edu> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4B4DF85F.8070303@acm.poly.edu> User-Agent: Mutt/1.5.20 (2009-06-14) Subject: Re: Oddities in dmesg 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: Wed, 13 Jan 2010 17:37:35 -0000 On Wed, Jan 13, 2010 at 11:44:15AM -0500, Boris Kochergin wrote: > Christoffer Persson wrote: > >I've recently rebooted one of our servers running FreeBSD 7.2-RELEASE-p4. I found this oddity in the boot message: > > > >GEOM_LABEL: Label for provider da0s1a is ufsid/48b6d1673e4caa72. > >GEOM_LABEL: Label ufsid/48b6d1673e4caa72 removed. > > > >GEOM_WLAARBNEILN:G : L/atbmepl wuafss indo/t4 8pbr6odp1e6r7lay3 addi0s1m3odu nrteemdov > >ed. > > > >GEOM_LABEL: Label ufsid/48b6d167a8e1f985 removed. > >WARNING: /usr was not properly dismounted > > > > > >Just repeated once, looks like it's a garble between two lines in the boot message. Has anyone seen this happening before > >or any idea what made it happen? > > > >/Christoffer Persson > > Yeah, this is due to lack of synchronization between multiple pieces > of code wanting to print something in parallel. I don't know if > anything can be done about it in 7.x, but the "PRINTF_BUFR_SIZE=128" > option in the GENERIC kernel for 8.x takes care of it. This isn't quite true -- use of the option (increasing the buffer size) appears to decrease the chance and/or severity of the interspersed output, but it still happens. This applies to both 7.x and 8.x. I'll note that I've seen Solaris 10 and (occasionally) Linux do this as well. -- | 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 |