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Date: Mon, 19 Mar 2018 22:14:01 +0100
From: Christoph Hellwig <hch@lst.de>
Subject: Re: [PATCH v6 12/15] xfs: require mmap lock for xfs_break_layouts()
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To: Dan Williams <dan.j.williams@intel.com>
Cc: Christoph Hellwig <hch@lst.de>, "Darrick J. Wong" <darrick.wong@oracle.com>, linux-nvdimm <linux-nvdimm@lists.01.org>, Ross Zwisler <ross.zwisler@linux.intel.com>, Dave Chinner <david@fromorbit.com>, linux-xfs <linux-xfs@vger.kernel.org>, linux-fsdevel <linux-fsdevel@vger.kernel.org>, Jan Kara <jack@suse.cz>, Linux Kernel Mailing List <linux-kernel@vger.kernel.org>

On Mon, Mar 19, 2018 at 01:10:52PM -0700, Dan Williams wrote:
> On Mon, Mar 19, 2018 at 12:45 PM, Christoph Hellwig <hch@lst.de> wrote:
> > On Mon, Mar 19, 2018 at 10:57:55AM -0700, Dan Williams wrote:
> >> I don't see anything to adapt with respect to mmap locks since reflink
> >> and dax are mutually exclusive.
> >
> > For now.  I'll change that pretty soon.
> 
> Right, so which patch set will be staged first? This one or the one
> that causes us to consider reflink vs dax locking?

Given that I haven't even posted the reflink+DAX support (not fixed
all issues with it) I'm pretty sure you'll be faster :)