On Thu, 2006-05-18 at 23:09, Jason Gunthorpe wrote: > 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).
Agreed. This saves on the overhead in the local subnet case. However, wouldn't the HopLimit returned from the SA in this case be 0 or 1 so why would that check be needed ? If it is, I think the DGID prefix checking may be more than just this. -- Hal _______________________________________________ openib-general mailing list [email protected] http://openib.org/mailman/listinfo/openib-general To unsubscribe, please visit http://openib.org/mailman/listinfo/openib-general
