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>>>>> "Andrew" == Andrew Brown <codewarrior@daemon.org> writes:

    >> Unnecessary. Note that you can distinguish old and new
    >> trivially, by the expedient of noting that the top 16 bits of
    >> old are always zero. This means that /dev/console (as 0,0) is
    >> the only special case you have to worry about.

    Andrew> that's not entirely accurate...you actually need to worry
    Andrew> about anything with a major number of 0.  this would
    Andrew> include the block interfaces for the wd? devices.

  I'd like to suggest that 32 bit major number 0, indicates a 16
device.
  BSDi has solved this, btw.
  I'd also like to suggest that 16 bits for the major number is over
doing it. I can understand 8 getting a bit tight in exceptional
conditions, but 12 ought to it. I suggest major numbers are 8 or 12
bits in size, and the rest is minor numbers.

   :!mcr!:            |  Network security programming, currently
   Michael Richardson | on contract with DataFellows F-Secure IPSec
 WWW: mcr@sandelman.ottawa.on.ca. PGP key available.

  

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