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Date:   Tue, 10 Nov 2020 18:38:23 +0000
From:   Christoph Hellwig <hch@infradead.org>
To:     Michal Suchanek <msuchanek@suse.de>
Cc:     linux-xfs@vger.kernel.org, linux-ext4@vger.kernel.org,
        Theodore Ts'o <tytso@mit.edu>,
        Andreas Dilger <adilger.kernel@dilger.ca>,
        "Darrick J. Wong" <darrick.wong@oracle.com>,
        Ira Weiny <ira.weiny@intel.com>, Jan Kara <jack@suse.cz>,
        linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/2] xfs: show the dax option in mount options.
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On Mon, Nov 09, 2020 at 08:10:08PM +0100, Michal Suchanek wrote:
> xfs accepts both dax and dax_enum but shows only dax_enum. Show both
> options.

Which is very much intentional.  The -o dax was an experimental hack
that fortunately is gone now.