Roland,
Alright...I'm not sure whats going on. I just now got a chance to test
this out and it still isn't working. I've tried with the latest from
SVN as well as the exact same kernel/rootFS you were using, and I still
can't ping between nodes. I'm just doing 'modprobe ib_mthca; modprobe
ib_ipoib; ifconfig ...; ping ...' on the same two nodes. Am I missing
something?
-JE
On Wed, 2004-12-15 at 07:51 -0800, Roland Dreier wrote:
> OK, I think the following change (already committed) should fix IPoIB
> with PCI Express HCAs. Thanks to Josh England for giving me access to
> a couple of his machines for debugging, and to Tziporet Koren for
> pointing out this Arbel "feature."
>
> - Roland
>
> Index: infiniband/hw/mthca/mthca_av.c
> ===================================================================
> --- infiniband/hw/mthca/mthca_av.c (revision 1331)
> +++ infiniband/hw/mthca/mthca_av.c (working copy)
> @@ -97,6 +97,9 @@
> cpu_to_be32((ah_attr->grh.traffic_class << 20) |
> ah_attr->grh.flow_label);
> memcpy(av->dgid, ah_attr->grh.dgid.raw, 16);
> + } else {
> + /* Arbel workaround -- low byte of GID must be 2 */
> + av->dgid[3] = cpu_to_be32(2);
> }
>
> if (0) {
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