Re: [PATCH v2] RDMA/CMA: fix iWARP adapter TCP port space usage

Pradeep Satyanarayana
2010-06-12T06:30:56Z

Roland Dreier wrote:
> > Other protocols are also running over networking today, such as iSCSI
> > and FCoE. These happily co-exist with other L2->L4 protocols in the
> > stack. This iWARP patch allows iWARP to happily co-exist on a TCP
> > connection, and does *not* negatively affect the networking stack at
> > all.
>
> How do iSCSI offload HBAs coexist? As I understand it, they typically
> just choose a separate IP address.
>
> In any case I'm not going to slip in a patch that another maintainer has
> explicitly NAKed. Maybe one way to force things forward would be to
> write up an exhaustive explanation of the underlying problem and the
> impact on end users, include this patch, explain that it touches only
> RDMA code, and point out that most end users are already using this
> patch since it's shipped in OFED. Then send the whole thing to Linus
> and Andrew Morton, making sure to cc Dave Miller, netdev, and
> linux-rdma.

Would it help to weigh in on the usage of RDMA, not so much a niche these days.
The latest top500 list shows 207 systems (i.e. 41%) using RDMA (read IB)?

Thanks
Pradeep