[openib-general] [PATCH 2/3] SA: add call to initialize ib_ah_attr from a path record

[Jason Gunthorpe]

On Thu, May 18, 2006 at 04:24:16PM -0700, Sean Hefty wrote:

> I should note that I compared the subnet prefixes to determine if the GRH 
> should be used.  Reading back over the 'GRH flag in ib_ah_attr' thread, it 
> looks like there's consensus that hop_limit > 1 is the check that we want.  
> I will update the code accordingly.

I think it is also prudent to not use a GRH if the DGID's prefix is
fe80::/64 (link local scope).

Jason