On Tue, Dec 15, 2009 at 12:15 PM, Jason Gunthorpe <jguntho...@obsidianresearch.com> wrote: >> > However, I don't understand the comment "Only set HopLimit if going >> > through a >> > router"? >> >> This is from '#ifdef ROUTER_EXP' days - as far as I could understand >> HopLimit should be set to IB_HOPLIMIT_MAX for inter-subnet MADs. > > If HopLimit is 0 then no GRH is required, if it is non 0 then the user
I think it is: HopLimit 0 or 1 requires no GRH (GRH is optional in these cases) and other than 0 or 1 requires GRH > of that path needs to apply a GRH. IIRC there are already a few things > in the kernel that follow this? Yes, we started down this path. This was all discussed on the list back prior to SC07 days AFAIR. -- Hal > Jason > -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html