[openib-general] Re: Mellanox HCAs: outstanding RDMAs

Roland Dreier rdreier at cisco.com
Tue Jun 6 08:00:16 PDT 2006


    Thomas> I don't see how strained has anything to do with it. It's
    Thomas> not saying anything either way. So, a legal implementation
    Thomas> can make either choice. We're talking about the spec!

I guess the reason I say it is strained is because the spec does have
the following compliance statement for the modify QP verb:

    C11-8 Upon invocation of this Verb, the CI shall modify the
    attributes for the specified QP...

So what should I expect to happen if I modify the number of
outstanding RDMA Read/atomic operations?  That the HCA will ignore
that attribute?  To me the only sensible interpretation of the spec is
that setting a limit on outstanding operations will limit the number
of outstanding operations.  If the attribute doesn't do anything, then
why would the spec include it?

 - R.




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