From mboxrd@z Thu Jan  1 00:00:00 1970
From: andrew henry <adhenry.9@gmail.com>
Subject: online snapshots of subvolumes?
Date: Sun, 19 Feb 2012 13:47:27 +0100
Message-ID: <4F40EF5F.1010404@gmail.com>
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To: linux-btrfs@vger.kernel.org
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Can I create a snapshot of a subvolume whilst that subvolume is mounted?
If so can you explain how?

I read the sysadmin guide and it details one management setup where you
leave the initial fs empty, create a subvol, then mount that, and for
subsequent subvol operations you need to first unmount the subvol and
remount the original empty fs.

--Andrew