Re: [PATCH rdma-next 0/3] Support out of order data placement

Jason Gunthorpe
2017-06-12T21:22:07Z

On Mon, Jun 12, 2017 at 04:18:34PM -0500, Steve Wise wrote:

> buffer when it polls the recv completion for the SEND or WRITE_W_IMMD. An iWARP
> RNIC _must_ guarantee in-order delivery of data (but not actual placement). Am
> I making sense?

Yes, and IB is technically the same.

As Tom pointed out, it is a quirk of the x86 & mellanox combination
that apps can reliably 'spin on the last byte', it is certainly not
guaranteed by any spec.

Jason