linux-kernel - Re: [PATCH v6 12/15] xfs: require mmap lock for xfs_break

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Message-ID: <CAPcyv4hhM3py_YG-qYcAxsqdCZT1aM+ziKffijVManPngbCg_A@mail.gmail.com>
Date:   Mon, 19 Mar 2018 13:10:52 -0700
From:   Dan Williams <dan.j.williams@...el.com>
To:     Christoph Hellwig <hch@....de>
Cc:     "Darrick J. Wong" <darrick.wong@...cle.com>,
        linux-nvdimm <linux-nvdimm@...ts.01.org>,
        Ross Zwisler <ross.zwisler@...ux.intel.com>,
        Dave Chinner <david@...morbit.com>,
        linux-xfs <linux-xfs@...r.kernel.org>,
        linux-fsdevel <linux-fsdevel@...r.kernel.org>,
        Jan Kara <jack@...e.cz>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v6 12/15] xfs: require mmap lock for xfs_break_layouts()

On Mon, Mar 19, 2018 at 12:45 PM, Christoph Hellwig <hch@....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?