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From: Steve Wise (swise_at_[hidden])
Date: 2007-05-09 17:56:46


On Wed, 2007-05-09 at 17:46 -0700, Andrew Friedley wrote:
> > Therefore, the only truly safe thing for an iWARP btl to do (or a
> > udapl btl since that is also an iWARP btl) is to have the active
> > layer send an MPI Layer "nop" of some kind immediately after
> > establishing the connection if there is nothing else to send.
>
> This is fine for an iWARP/RDMACM/whatever BTL (or anything else that
> uses the OFA verbs interface(s)), but my argument is that uDAPL is NOT
> specifically there to support just iWARP (though it may include it), and
> that OFED's uDAPL should be adjusted to handle this. Again, uDAPL is a
> network *independent* abstraction, so requiring network-dependent
> behavior from the uDAPL consumer is wrong.
>
> A related question -- how does this 'connection initiator must send
> first' requirement relate to UD?
>

It doesn't. UD isn't supported in IWARP.