1. This version of the Portals LND is intended to work on the Cray XT3 using Cray Portals as a network transport. 2. To enable the building of the Portals LND (ptllnd.ko) configure with the following option: ./configure --with-portals= 3. The following configuration options are supported ntx: The total number of message descritprs concurrent_peers: The maximum number of conncurent peers. Peers attemting to connect beyond the maximum will not be allowd. peer_hash_table_size: The number of hash table slots for the peers. This number should scale with concurrent_peers. cksum: Set to non-zero to enable message (not RDMA) checksums for outgoing packets. Incoming packets will always be checksumed if necssary, independnt of this value. timeout: The amount of time a request can linger in a peers active queue, before the peer is considered dead. Units: seconds. portal: The portal ID to use for the ptllnd traffic. rxb_npages: The number of pages in a RX Buffer. credits: The maximum total number of concurrent sends that are outstanding at any given instant. peercredits: The maximum number of concurrent sends that are outstanding to a single piere at any given instant. max_msg_size: The maximum immedate message size. This MUST be the same on all nodes in a cluster. A peer connecting with a diffrent max_msg_size will be rejected.