[ofa-general] [PATCH] ipoib: refresh path when remote lid changes

[Hal Rosenstock]

On Wed, Jul 29, 2009 at 10:22 AM, Moni Shoua <monis at voltaire.com> wrote:

> Hal Rosenstock wrote:
> >
> >
> > On Wed, Jul 29, 2009 at 8:16 AM, Moni Shoua <monis at voltaire.com
>  > <mailto:monis at voltaire.com>> wrote:
> >
> >
> >     >     > Is the LMC in the above from the local port ? Unfortunately,
> LMC
> >     >     is not
> >     >     > required to be uniform across the subnet so the remote
> >     port's LMC may
> >     >     > not be the same as that on the local port.
> >     >
> >     >     opensm configures the same LMC to all endports (CA) in the
> >     fabric so
> >     >     in which case do you suspect that
> >     >     it will be different?
> >     >
> >     >
> >     > I wasn't talking about the simplification that OpenSM uses but
> rather
> >     > what IBA allows. There may be other SMs which do this or OpenSM
> >     could be
> >     > extended (with additional configuration for this).
> >     >
> >     > -- Hal
> >
> >     So I guess a possible solutions for that is to query each suspected
> >     node before making a decision to flush it.
> >     When getting the node info response the true LMC can be put in the
> >     LID check function.
> >
> >
> > I'm not following how you are saying to determine the true LMC (of the
> > remote port).
> >
> Send PortInfo query for that port


from the IPoIB client ? I think this ends up needing to contact the SA to
get this info rather than the port directly. Isn't that what you were trying
to avoid originally ? If that's the case, one way would've been if ARPs
carried the LMC as well as the LID.
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