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Message-ID: <20170926063611.GD6870@lst.de>
Date:   Tue, 26 Sep 2017 08:36:11 +0200
From:   Christoph Hellwig <hch@....de>
To:     Ross Zwisler <ross.zwisler@...ux.intel.com>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        linux-kernel@...r.kernel.org,
        "Darrick J. Wong" <darrick.wong@...cle.com>,
        "J. Bruce Fields" <bfields@...ldses.org>,
        Christoph Hellwig <hch@....de>,
        Dan Williams <dan.j.williams@...el.com>,
        Dave Chinner <david@...morbit.com>, Jan Kara <jack@...e.cz>,
        Jeff Layton <jlayton@...chiereds.net>,
        linux-fsdevel@...r.kernel.org, linux-mm@...ck.org,
        linux-nvdimm@...ts.01.org, linux-xfs@...r.kernel.org
Subject: Re: [PATCH 7/7] xfs: re-enable XFS per-inode DAX

On Mon, Sep 25, 2017 at 05:14:04PM -0600, Ross Zwisler wrote:
> Re-enable the XFS per-inode DAX flag, preventing S_DAX from changing when
> any mappings are present.

Before we re-enable it please come up with a coherent description
of the per-inode DAX flag that makes sense to a user.  We'll also need
to find a good place to document it, e.g. a new ioctl_setflags man
page.

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