Re: [PATCH 0/3] IB Netlink Interface and RDMA CM exports

[Jason Gunthorpe <jgunthorpe-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>]

On Wed, Nov 17, 2010 at 01:34:29PM -0800, Roland Dreier wrote:

> In fact I'm not sure even for embedded it's worth making this something
> that can be configured out.  We probably have too many config options
> that no one ever uses as it is.  Are there any embedded systems that are
> both so small that a few K of code matters and also use RDMA?

I experimented with re-tasking rxe to act as a soft-IB. The only
reason to do this was to run IPOIB, and the system was very small. So
in that instance I did benefit from running without may of the IB
modules - but I would have been entirely happy with a CONFIG_XX
controlled by CONFIG_EMBEDDED, since the system didn't use modules at
all anyhow.

I agree that there are too many IB modules - the main problem is that
they do not demand-load. Just today I had to walk someone through
loading rdma_ucm because the system was brand new Ubuntu and there is
no automatic script to load them.

There is sort of a general failing of the module dependency/autoload
system here that would be awesome to fix..

Jason
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