On Tue, Nov 01, 2016 at 03:05:22PM -0600, Jens Axboe wrote:
> For legacy block, we simply track them in the request queue. For
> blk-mq, we track them on a per-sw queue basis, which we can then
> sum up through the hardware queues and finally to a per device
> state.
>
> The stats are tracked in, roughly, 0.1s interval windows.
>
> Add sysfs files to display the stats.
>
> Signed-off-by: Jens Axboe <[email protected]>
> ---
[...]
>
> /* incremented at completion time */
> unsigned long ____cacheline_aligned_in_smp rq_completed[2];
> + struct blk_rq_stat stat[2];
Can you add an enum or define for the directions? Just 0 and 1 aren't very
intuitive.
Johannes
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