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

[Jason Gunthorpe]

On Mon, Aug 03, 2009 at 08:10:07PM +0300, Yossi Etigin wrote:

> We have customers with large fabrics and different machines/operation systems, 
> where the LID does not always stay the same.They are experiencing loss of
> IPoIB connectivity. The patch above solved that. Besides, according to the 
> IB spec, LIDs are not persistent and can change (although most SM today do
> try to keep them persistent).

Hmm, have you considered changing the IPoIB QPN when the LID changes?
This would provide a clear signal to anyone with a cached ARP entry
that it is wrong.

But even so, IPoIB implicitly assumes that the LID doesn't change, by
design. That SA really has to try to make that true when IPoIB is used.

Jason