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Date: Tue, 18 Sep 2001 13:05:51 +0200
From: Helge Hafting <helgehaf@idb.hist.no>
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To: Andrea Arcangeli <andrea@suse.de>, linux-kernel@vger.kernel.org
Subject: Re: Linux 2.4.10-pre11
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Andrea Arcangeli wrote:

> very clear now, thanks. I though the fs you were talking about was
> mounted on the blkdev, while it is instead the one where the blkdev
> inode cames from. Usually people keeps bldkev in /dev and nobody
> unmounts /dev that's why I didn't noticed and thought about it, sorry.
> 
Don't assume "nobody does..."  There is always someone that do.

This particular one will easily come up for anybody who
develop boot floppies:

1.  Mount the boot floppy at /mnt
2.  Test the device files in /mnt/dev, _perhaps by using them
    in every way imaginable_
3.  Umount the boot floppy. - There goes /mnt/dev and a bunch
    of block devices.  

Umounting some dev/ is common enough.

Helge Hafting