[PATCH 2/2] nvme-rdma: Add remote_invalidation module parameter

[Sagi Grimberg]

Idan,

> NVMe over Fabrics in its secure "register_always" mode
> registers and invalidates the user buffer upon each IO.
> The protocol enables the host to request the susbsystem
> to use SEND WITH INVALIDATE operation while returning the
> response capsule and invalidate the local key
> (remote_invalidation).
> In some HW implementations, the local network adapter may
> perform better while using local invalidation operations.

This is a device quirk and if you want to optimize for this
you need to expose it via verbs interface. We won't add a module
parameter for implementation specific stuff.

Note that we currently need to rework the case where we use local
invalidates and properly wait for them to complete.