fs/proc/inode-alloc.txt

   1 Current inode allocations in the proc-fs (hex-numbers):
   2
   3   00000000              reserved
   4   00000001-00000fff     static entries  (goners)
   5        001              root-ino
   6
   7   00001000-00001fff     unused
   8   0001xxxx-7fffxxxx     pid-dir entries for pid 1-7fff
   9   80000000-efffffff     unused
  10   f0000000-ffffffff     dynamic entries
  11
  12 Goal:
  13         a) once we'll split the thing into several virtual filesystems we
  14         will get rid of magical ranges (and this file, BTW).