[ofa-general] Default value of LocalAckTimeout for a new QP

[Davis, Arlin R]

>> Sean Hi,
>>
>> I need to know how is the LocalAckTimeout for a new QP is 
>calculated (for an
>> SDP QP).
>
>It's a function of the packet life time on the path from source to
>destination and the local CA ack delay.
>
>> Is there a way to change it through a module parameter?
>> If not, what is the right way to change it?
>
>It depends on the SM being used. OpenSM has a way to change the path
>PLT returned/used.

You can actually modify the path record (rdma_cm_id.route->path_rec) 
before the rdma_connect, after the RDMA_CM_EVENT_ROUTE_RESOLVED event, 
and rdma_cm will pick up the change for the internal QP modify. 

-arlin