[PATCH 08/10] nvme-rdma: clamp queue size according to ctrl cap

[Sagi Grimberg]

>>> If a controller is configured with metadata support, clamp the maximal
>>> queue size to be 128 since there are more resources that are needed
>>> for metadata operations. Otherwise, clamp it to 256.
>>
>> Does the qp allocation succeeds or fails if attempting to create
>> 256 size with metadata?
> 
> It succeeds (tried ConnectX-4 and ConnectX-6 dx), but there are a lot of 
> metadata resources we allocate so the scale will be lower. I don't see a 
> reason to allocate more than 128 entries for metadata controllers.

Me neither, it would have been nice to get this information from the
rdma core though.