Re: [PATCH V7 4/6] blk-mq: introduce .get_budget and .put_budget in blk_mq_ops

[Jens Axboe]

On 10/13/2017 10:31 AM, Bart Van Assche wrote:
> On Sat, 2017-10-14 at 00:07 +0800, Ming Lei wrote:
>> Actually it is in hot path, for example, lpfc and qla2xx's queue depth is 3,
> 
> Sorry but I doubt whether that is correct. More in general, I don't know any modern
> storage HBA for which the default queue depth is so low.

That does seem insanely low. BTW, even a low depth isn't an issue, as long as
we know what it roughly is.


-- 
Jens Axboe