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[dm-devel] Re: [RESEND] [PATCH linux-2.6-block#for-2.6.32] Seperate read and write statistics of in_flight requests



On Fri, Sep 11 2009, Nikanth Karthikesan wrote:
> Currently, there is a single in_flight counter measuring the number of
> requests in the request_queue. But some monitoring tools would like to
> know how many read requests and write requests are in progress. Split the
> current in_flight counter into two seperate counters for read and write.
> 
> This information is exported as a sysfs attribute, as changing the
> currently available stat files would break the existing tools.

Applied, this is better than breaking existing stat exports.

-- 
Jens Axboe


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