[ofw] [PATCH] DAPL v2.0: common: increase default IB ack timer from 16 to 20

[Davis, Arlin R]

> > Yes, a user can modify path lifetime via rdma_create_ep() but there
> > is no way for the user to know how much that will be manipulated and
> > increased in the IB CM driver.
> 
> Sure there is.  It's an open source driver.  :)
> 
> The ib_cm calculates the "correct" timeout based on the packet lifetime
> provided by the SA and the CA ack timeout.  If user modifications to
> this value are necessary, then there is a bug in either the SA or HCA
> driver.

or there could be congestion on the fabric that the SA or HCA driver is unaware of.