[ewg] IB verbs test problem

[Roland Dreier]

 > I guess you are running as a regular user and not root thus memory
 > registration fails due to limit on amount of memory that the user can
 > lock.

I wonder if the libibverbs startup should do getrlimit(RLIMIT_MEMLOCK)
and print a more informative warning message if the limit looks too
low (less than 64 KB or so?  what is the default on the distros where
there are problems like this)...