linux-ext4 - Re: [PATCH 09/13] dax: Allow dax_iomap

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Message-ID: <20170821184501.GA26220@linux.intel.com>
Date:   Mon, 21 Aug 2017 12:45:01 -0600
From:   Ross Zwisler <ross.zwisler@...ux.intel.com>
To:     Jan Kara <jack@...e.cz>
Cc:     linux-fsdevel@...r.kernel.org, linux-nvdimm@...ts.01.org,
        Andy Lutomirski <luto@...nel.org>, linux-ext4@...r.kernel.org,
        linux-xfs@...r.kernel.org, Christoph Hellwig <hch@...radead.org>,
        Ross Zwisler <ross.zwisler@...ux.intel.com>,
        Dan Williams <dan.j.williams@...el.com>,
        Boaz Harrosh <boazh@...app.com>
Subject: Re: [PATCH 09/13] dax: Allow dax_iomap_fault() to return pfn

On Thu, Aug 17, 2017 at 06:08:11PM +0200, Jan Kara wrote:
> For synchronous page fault dax_iomap_fault() will need to return PFN
> which will then need to inserted into page tables after fsync()
> completes. Add necessary parameter to dax_iomap_fault().
> 
> Signed-off-by: Jan Kara <jack@...e.cz>

Yep, this seems like a nice, straightforward way of doing things.  I like this
better than the vmf->orig_pte solution from the previous RFC.

Reviewed-by: Ross Zwisler <ross.zwisler@...ux.intel.com>