Re: Enabling peer to peer device transactions for PCIe devices

Logan Gunthorpe
2016-11-30T18:01:09Z

On 30/11/16 09:23 AM, Jason Gunthorpe wrote:
>> Two cases I can think of are RDMA access to an NVMe device's controller
>> memory buffer,
>
> I'm not sure on the use model there..

The NVMe fabrics stuff could probably make use of this. It's an
in-kernel system to allow remote access to an NVMe device over RDMA. So
they ought to be able to optimize their transfers by DMAing directly to
the NVMe's CMB -- no userspace interface would be required but there
would need some kernel infrastructure.

Logan