[PATCH 8/8] nvme-loop: add a NVMe loopback device

[Christoph Hellwig]

On Sun, Nov 15, 2015 at 09:18:34PM +0200, Sagi Grimberg wrote:
>
>> +	ctrl->queue_count = 1; /* admin queue */;
>> +	if (nr_io_queues > 0)
>> +		ctrl->queue_count += nr_io_queues;
>> +	else
>> +		ctrl->queue_count += num_possible_cpus();
>
> This should really be num_online_cpus(), I get way more than
> I need with num_possible_cpus()...

Maybe.  But then we'd want a hot plug event.  The whole number of
contexts thing is a bit of a mess.