[openib-general] Re: IPoIB and lid change

[Hal Rosenstock]

On Sun, 2006-02-12 at 08:36, Michael S. Tsirkin wrote:
> Quoting r. Hal Rosenstock <halr at voltaire.com>:
> > Subject: Re: IPoIB and lid change
> > 
> > On Wed, 2006-02-08 at 15:14, Michael S. Tsirkin wrote:
> > > Hi, Roland!
> > > One issue we have with IPoIB is that IPoIB may cache a remote node path for
> > > a long time. Remote LID may get changed e.g. if the SM is changed, and IPoIB
> > > might lose connectivity.
> > 
> > The remote LID may get changed for other reasons too without an SM
> > change (SM merge of 2 separate subnets). How can this be handled ?
> 
> Change the SM to trigger SM lid change for both subnets?

I think that's overly disruptive for the subnet whose SM didn't change.
There should be a gentler way...

-- Hal

> > > One simple way to address this would be to have a list of all
> > > address handles per net device and kill them on an SM change event.
> > > 
> > > What do you think?
> >