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Date: Mon, 10 Oct 2016 03:24:18 -0700
From: Christoph Hellwig <hch@infradead.org>
Subject: Re: [PATCH 7/7] xfs: clear reflink flag if setting realtime flag
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To: "Darrick J. Wong" <darrick.wong@oracle.com>
Cc: david@fromorbit.com, linux-xfs@vger.kernel.org, Brian Foster <bfoster@redhat.com>

On Fri, Oct 07, 2016 at 04:08:03PM -0700, Darrick J. Wong wrote:
> Since we can only turn on the rt flag if there are no data extents,
> we can safely turn off the reflink flag if the rt flag is being
> turned on.

Why would the reflink flag ever be turned on if we have no data extents?