Re: [nfsv4] Review of draft-ietf-nfsv4-rfc5667bis-09

[Tom Talpey <[e-mail]>]

On 4/27/2017 11:35 AM, Chuck Lever wrote:
> We could do something clever like add these limits to the
> RDMA CM private data.

Please, no. Placing a message in that data is in itself a protocol,
and the size and support for that data is implementation defined,
in the RDMA layer.

If such a parameter exchange is required (and remember it needs to
go both ways), just define it as a full-blown negotiation, at the
RPC-RDMA, or better, the NFS layer. There are already some RDMA
values exchanged in the NFSv4.1 Session establishment, which could
be extended.

Tom.