On Sun, Oct 05, 2003 at 10:18:53AM +0200, Jaromir Dolecek wrote:
  | Hi,
  | 
  | following recent discussion on MI-assigned majors, I made first step
  | in the direction.
  | 
  | Majors for MI devices are now assigned centrally for all ports, in
  | src/sys/dev/majors. This file is automatically included during
  | kernel config. Any new MI drivers (i.e. drivers usable on more
  | than one arch) majors should be assigned there instead of
  | arch/*/conf/majors.ARCH.
  | 
  | The range for MI majors starts at 192. The primary reason
  | to not start at 256 is that there is no real need for bigger
  | gap (the biggest MD major is 139 ATM, which is plenty of space),
  | and that this would avoid major mapping problems for emulations
  | which use 8bit majors.

[also see my other comment about this.]

On the other hand, reserving a range of major numbers for "local" use 
would be useful; I'm sure I've seen this requested in the past.

What if we reserved 192-255 for local use and 256+ for MI use?

Luke.