Fwd: Re: [openib-general] static LID computation withTS_HOST_DRIVER

[Roland Dreier]

    Michael> See section 17.3.1 version 1.1 page 919 of volume 1 which
    Michael> provides specific guidance on how loopback is implemented
    Michael> and what LID should be used.  There is no reason for a
    Michael> loopback LID.  This topic was debated and the spec
    Michael> reflects the outcome of the debate.

I think you missed the context of this discussion.  There are
applications that want to start up even if their node has not been
discovered by the SM yet (and their local ports are in INIT or even
DOWN).  These applications have multiple processes that communicate
via loopback RC QPs.

If they use the current value of the node's LID (before the SM has
finished discovery) and the SM then changes this LID, then the RC QPs
have their connections broken and the application is not happy.

 - Roland