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Date: Tue, 26 Sep 2017 07:44:21 -0700
From: Christoph Hellwig <hch@infradead.org>
Subject: Re: [PATCH] xfs: always swap the cow forks when swapping extents
Message-ID: <20170926144421.GB9530@infradead.org>
References: <20170923071208.GN5728@magnolia>
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To: "Darrick J. Wong" <darrick.wong@oracle.com>
Cc: xfs <linux-xfs@vger.kernel.org>

On Sat, Sep 23, 2017 at 12:12:08AM -0700, Darrick J. Wong wrote:
> Since the CoW fork exists as a secondary data structure to the data
> fork, we must always swap cow forks during swapext.  We also need to
> swap the extent counts and reset the cowblocks tags.

Do you have a test that triggers a problem without this? :)

Looks good:

Reviewed-by: Christoph Hellwig <hch@lst.de>