Re: cel's patches under development

[Olaf Kirch <olaf.kirch@oracle.com>]

On Wednesday 11 April 2007 13:39, Talpey, Thomas wrote:
> FWIW, I'm still looking at this from the RDMA perspective. I like the
> abstraction of the data representation, but I don't like the protocol
> specific switch statements that are in the data movement. These

Right now, the proposed rpc_data thing has two function pointers,
so no switch needed.

> are cumbersome and don't lend themselves to dynamic loading. Also,
> RDMA isn't a new protocol family, so it doesn't lend itself to an
> IPv4/IPv6 and UDP/TCP kind of switch.

How is it integrated on the client side? Wouldn't this be another
transport in terms of Chuck's transport switch? If so, it would just
provide a function for creating an RDMA specific rpc_data object
that does the right thing.

> The RDMA code turns out to not need this, because the xdr iov's
> have a clear encoding for pagelists (head->pages[]->tail).

But that means yet another non-obvious user of xdr_buf that makes
it even harder to rewrite that whole code :-) Wouldn't it be better
to make it explicit "here is a bunch of pages that I want you to
put the bulk data into"?

Olaf
-- 
Olaf Kirch  |  --- o --- Nous sommes du soleil we love when we play
okir@lst.de |    / | \   sol.dhoop.naytheet.ah kin.ir.samse.qurax

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