Re: [PATCH v5] DAX: enable iostat for read/write

[Christoph Hellwig]

On Thu, Jan 12, 2017 at 11:38:48AM -0700, Toshi Kani wrote:
> DAX IO path does not support iostat, but its metadata IO path does.
> Therefore, iostat shows metadata IO statistics only, which has been
> confusing to users.
> 
> Add iostat support to the DAX read/write path.
> 
> Note, iostat still does not support the DAX mmap path as it allows
> user applications to access directly.

NAK.  DAX I/O should not be accounted for block device statistics.