From: Christoph Hellwig <hch@lst.de>
Subject: Re: [PATCH v4 00/18] dax: fix dma vs truncate/hole-punch
Date: Thu, 4 Jan 2018 09:17:55 +0100
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> So far this solution only targets xfs since it already implements
> xfs_break_layouts in all the locations that would need this
> synchronization. It applies on top of the vmem_altmap / dev_pagemap
> reworks from Christoph.

Those got a rebase since your posting of this series, btw.