Date: Wed, 02 Feb 2005 12:02:11 +0100 From: "Poul-Henning Kamp" <phk@phk.freebsd.dk> To: Robert Watson <rwatson@freebsd.org> Cc: Niclas Zeising <lothrandil@n00b.apagnu.se> Subject: Re: unmount of /dev failed Message-ID: <34029.1107342131@critter.freebsd.dk> In-Reply-To: Your message of "Wed, 02 Feb 2005 10:12:25 GMT." <Pine.NEB.3.96L.1050202100610.68249C-100000@fledge.watson.org>
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In message <Pine.NEB.3.96L.1050202100610.68249C-100000@fledge.watson.org>, Robert Watson writes: >On Wed, 2 Feb 2005, Niclas Zeising wrote: > >> I am using current as of yesterday (20050201) morning CET (around 0800 i >> think). When I shutdown or reboot my system (shutdown -[h,r] now) it >> runs through the shut down sequence as usual, but right before it is >> rebooting or the message about the shutdown complete comes up, when >> unmouning dev, it complains about "unmount of /dev failed (BUSY)" before >> shutting down as usual. Is this a bug, and if so, common or known? Or >> am I just being stupid somewhere and all is my fault? Just let me know >> if I need to provide more information. > >I'm guessing this started occuring because phk changed devfs not to permit >forceable unmount due to some nasty issues involved (devfs_vfsops.c:1.41). >And, for some reason, we presumably have a lingering reference to devfs -- >perhaps the root file system mounted from a devfs vnode, another feature >introduced recently? It's probably non-harmful, but probably also should >be fixed by properly unwinding and unmounting devfs at the right moment in >the shutdown to reflect changes in the boot order. It's on my list, but since it doesn't hurt the on-disk filesystems it is not a high priority. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 phk@FreeBSD.ORG | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence.
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