[2.5] Why does nbd register 128 disks when it loads?

[Chuck Ebbert]

 Using 2.5.68-ce2, nbd built-in but never used:

# find /sys -type d | wc -l
    423
# find /sys -type d | grep nbd | wc -l
    256
# find /sys -type d | grep nbd | grep iosched | wc -l
    128

------
 Chuck