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SubjectRe: [PATCH 12/15] libnvdimm: enable iostat
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On Fri, Jun 19, 2015 at 1:34 AM, Christoph Hellwig <hch@lst.de> wrote:
> On Wed, Jun 17, 2015 at 07:55:51PM -0400, Dan Williams wrote:
>> This is disabled by default as the overhead is prohibitive, but if the
>> user takes the action to turn it on we'll oblige.
>
> If you care about users a compile time selection doesn't make sense,
> why not always build it but require an opt-in?

It's always built the Kconfig just selects the default initial state
of QUEUE_FLAG_IO_STAT. They can always turn it on/off via block queue
sysfs.


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