Roland Dreier wrote:
> > I'm just trying to define the scope of the issue here... so is there any
> > conceivable real-life situation where neither a 0B read nor a 0B write
> > would work, and the connection setup will have to use a 0B send?
> i'm not sure what you mean by "real-life". For the rnics we have:
>
> nes - requires 0b write
> cxgb3 - requires 0b read
> amso1100 - won't work in p2p mode
>
> So there are none that I know of that require a send for this.
I guess my question was whether we expect to ever need to worry about
the 0B send case, or whether it's just theoretical. If no current NICs
have a problem with read or write, and future NICs will be built to a
future MPA spec, then it seems we don't have to worry about what happens
if a 0B send is done as part of connection setup.
I agree. We can dump the 0B send stuff.
The spurious CQE on connection failure and the private data breakage are
serious obviously. The interoperability issues of this stuff seem
pretty painful to me.
Its is painful. But without anything, you cannot run OMPI, IMPI or
HPMPI on a iwarp cluster with mixed vendor rnics...
Steve.
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