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Date: Tue, 30 Oct 2012 16:20:05 +0100
From: =?ISO-8859-1?B?R+Fib3I=?= Nyers <gnyers@suse.com>
To: linux-btrfs <linux-btrfs@vger.kernel.org>
Subject: How to find (out if) files sharing content?
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Hi,

How could one find out if 2 files share any extents on a btrfs file system?

A more generic variation of the above: How to list files on the same
file system/subvolume sharing content?

Thanks,
Gábor