From owner-freebsd-current@FreeBSD.ORG  Wed Aug 18 15:20:14 2010
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Date: Wed, 18 Aug 2010 17:20:13 +0200
From: Ed Schouten <ed@80386.nl>
To: Pawel Jakub Dawidek <pjd@FreeBSD.org>
Message-ID: <20100818152013.GF2978@hoeg.nl>
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Cc: freebsd-fs@freebsd.org, Daichi GOTO <daichi@freebsd.org>,
	freebsd-current@freebsd.org
Subject: Re: Mounting cd9660 multiple times gives EBUSY [Was: unionfs a
 little improvement]
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* Pawel Jakub Dawidek <pjd@FreeBSD.org> wrote:
> What you are trying to do here is to mount /dev/iso9660/freebsd for the
> second time? This is not supported. The check is there to prevent doing
> this, as it will panic on you when you try to unmount first mount (not
> really a problem in your case, as the first mount is /, so you probably
> don't want to unmount it, but it is a problem in general).
>=20
> You should be able to reproduce the panic with your patch applied by
> doing the following:
>=20
> 	# mount -t cd9660 /dev/iso9660/freebsd /mnt0
> 	# mount -t cd9660 /dev/iso9660/freebsd /mnt1
> 	# umount /mnt0

Ah, I see. Well, I changed my setup to use an md root now. Works quite
nicely. Screenshot:

	http://80386.nl/pub/livecd.png

Thanks for the explanation!

--=20
 Ed Schouten <ed@80386.nl>
 WWW: http://80386.nl/

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