On Thu, Aug 03, 2017 at 05:33:13PM +0000, Bart Van Assche wrote:
> Are you aware that the SCSI core already keeps track of the number of busy 
> requests
> per LUN? See also the device_busy member of struct scsi_device. How about 
> giving the
> block layer core access in some way to that counter?

I'd love ot move it to blk-mq in a scalable way eventually, as
we'll run into the same problems with NVMe systems with multiple

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