On 3/18/2019 11:34 PM, Sagi Grimberg wrote:

quoted

As we discussed, let's check with RDMA maintainers if it's better to 
extend alloc_cq API or create alloc_cq_dim API function.

Sagi/Christoph,

how about adding a module param per ULP ? as we use register_always 
today, create a use_dimm module param for iSER/NVMe-RDMA ?

I would say that its better (and simpler) to do a global sysctl knob for
it. No need for a per-ULP param for a starting point.

for sure it's simpler, but in this case all should agree that in case we 
run more than 1 ULP in a server, all of them will have the same 
configuration (no QoS).

are you suggesting something like:

/proc/sys/rdma/mlx5_0/dim

Jason/Leon/Doug,

thoughts about the best way to configure this feature from your 
perspective ?