[openib-general] Re: InfiniBand MAD device number request

[Roland Dreier]

    Torben> How many minors do you guys need? char majors are very
    Torben> scarce, so if you know how many you need, we can make the
    Torben> best possible assignment.

One minor is consumed for each port of each InfiniBand HCA installed
in the system.  I know of real systems that have 10 two-port HCAs
installed, which would require 20 minors.  32 minors may be too few,
since it would not allow for a doubling of already-existing
installations, although perhaps larger systems could be forced to use
dynamic major allocation.

So depending on how constrained your allocation space is, I would
prefer 64 minors but 32 is probably OK.

Thanks,
  Roland