From mboxrd@z Thu Jan  1 00:00:00 1970
From: Kent Overstreet <koverstreet-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
Subject: Re: Bcache upstreaming
Date: Fri, 1 Feb 2013 08:17:27 -0800
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To: Mike Snitzer <snitzer-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
Cc: Kent Overstreet <kent.overstreet-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>, linux-bcache-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, device-mapper development <dm-devel-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
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On Fri, Feb 01, 2013 at 11:12:27AM -0500, Mike Snitzer wrote:
> > Was there still a directory in /sys/fs/bcache?
> 
> Yes, after unmount the /dev/bcacheX device is deleted but the
> associated /sys/fs/bcache/<uuid> still exists.
> 
> Echoing 1 to /sys/fs/bcache/<uuid>/stop cleared it up.

Yep, that's how it's supposed to work.