[openib-general] Re: [Rdma-developers] Meeting (07/22) summary:OpenRDMA community development discussion

[Christoph Hellwig]

On Mon, Aug 01, 2005 at 07:00:48AM -0400, Talpey, Thomas wrote:
> At 06:49 AM 8/1/2005, Caitlin Bestler wrote:
> >After that we need a standardized way to implement "modify qp
> >to RTS" in a iWARP-centric fashion.
> 
> I will add that RPC/RDMA (NFS-RDMA) does not currently require this
> functionality, it begins all connections in RDMA mode and the current
> DAPL semantics are fine for now. This functionality would be of great
> importance to iSER however, of course.
> 
> In the future, NFSv4/sessions has an exchange which can to make
> use of the iWARP step-up mode, but it is not required and we have
> deferred implementing it in the session establishment so far.

I think taking over an existing TCP connection is a horrible idea
and we should avoid it if possible.  The state for a TCP connection
is very complex and it's doubtfull we can make it work 100%.