Re: [PATCH v4 18/18] xfs, dax: wire up dax_flush_dma support via a new xfs_sync_dma helper

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On Wed, Jan 03, 2018 at 10:00:27AM +1100, Dave Chinner wrote:
> AFAIC, these DMA references are just another external layout
> reference that needs to be broken.  IOWs, this "sync DMA" complexity
> needs to go inside xfs_break_layouts() as it is part of breaking the
> external reference to the file layout - it does not replace the
> layout breaking abstraction and so the implementation needs to
> reflect that.

Agreed.
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