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

From	Christoph Hellwig <hch@infradead.org>
Newsgroups	linux.kernel
Subject	Re: [PATCH v5] DAX: enable iostat for read/write
Date	2017-01-25 12:30 +0100
Message-ID	<t3tW1-16w-11@gated-at.bofh.it> (permalink)
References	<sYRFE-6Pt-19@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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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.

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Re: [PATCH v5] DAX: enable iostat for read/write Christoph Hellwig <hch@infradead.org> - 2017-01-25 12:30 +0100
  Re: [PATCH v5] DAX: enable iostat for read/write Jeff Moyer <jmoyer@redhat.com> - 2017-01-25 16:20 +0100
    Re: [PATCH v5] DAX: enable iostat for read/write "Kani, Toshimitsu" <toshi.kani@hpe.com> - 2017-01-25 17:00 +0100

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