[PATCH v24 01/20] net: Introduce direct data placement tcp offload

[Aurelien Aptel]

Hi Sagi,

Sagi Grimberg <sagi at grimberg.me> writes:
>> +     config->io_cpu = sk->sk_incoming_cpu;
>> +     ret = netdev->netdev_ops->ulp_ddp_ops->sk_add(netdev, sk, config);
>
> Still don't understand why you need the io_cpu config if you are passing
> the sk to the driver...

With our HW we cannot move the offload queues to a different CPU without
destroying and recreating the offload resources on the new CPU.

Since the connection is created from a different CPU then the io queue
thread, we cannot predict which CPU we should create our offload context
on.

Ideally, io_cpu should be set to nvme_queue->io_cpu or it should be removed
and the socket should be offloaded from the io thread. What do you
prefer?

Thanks