[ofa-general] Re: [PATCH draft, untested] ehca srq emulation (for IPoIB CM)

[Michael S. Tsirkin]

> Quoting Roland Dreier <rdreier at cisco.com>:
> Subject: Re: [PATCH draft, untested] ehca srq emulation (for IPoIB CM)
> 
> Not sure I follow how this code works.  What happens if I attach 100
> QPs to an SRQ and then post only 50 receives?

Thanks for asking. 

Note this is not a full emulation, just close enough to make IPoIB CM work.

The assumption I made is that you will post max_wrs receives (this is what IPoIB does).

If this is what you do, each QP will get WR_PER_QP receives (its a macro now,
can be made module option, or exposed in srq_attr).
And if you try to attach more than max_wrs/WR_PER_QP QPs, create QP will fail.


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MST