Date: Wed, 13 Jan 2010 09:37:31 -0800 From: Jeremy Chadwick <freebsd@jdc.parodius.com> To: freebsd-stable@freebsd.org Subject: Re: Oddities in dmesg Message-ID: <20100113173731.GA33254@icarus.home.lan> In-Reply-To: <4B4DF85F.8070303@acm.poly.edu> References: <D48B6009-4EEA-40D0-933E-92B8AC5C4855@fullrate.dk> <4B4DF85F.8070303@acm.poly.edu>
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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 |
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