6. Name a feature that is in Linux 2.6 but not in 2.4:
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  160.33.66.118: O(1) scheduler
 63.246.173.244: udev file system
  160.33.66.118: NPTL
   210.94.41.89: O(1) scheduler
 71.117.239.229: Preemptible kernel
  202.101.8.193: O(1) scheduler
   69.238.142.7: Preemptible kernel
  66.93.224.205: bloat
   57.67.28.231: Preemptible kernel
  84.150.106.35: hirez timers
 203.141.89.145: Linux Security Modules
    57.67.161.6: sysfs
    62.252.0.11: USB 2.0
    57.78.11.38: O(1) scheduler
 81.138.115.145: CPU hotplug
 192.100.104.17: noMMU support
  193.120.90.36: sysfs
 82.171.189.134: hotplug
    57.78.11.38: udev
  134.134.136.2: O(1) scheduler
  15.235.249.72: netlink
  15.235.249.71: O(1) scheduler
   15.238.95.37: kernel threads
 150.150.71.119: O(1) scheduler
   137.153.0.41: O(1) scheduler
   137.153.0.40: I/O schedulers
   137.153.0.42: noMMU support
 161.85.127.153: Platform devices
 193.131.176.54: O(1) scheduler
 193.131.176.54: IO schedulers
  192.88.158.50: sysfs
   202.32.86.15: Preemptible Kernel
   210.94.41.89: O(1) scheduler
   210.94.41.89: O(1) scheduler
  58.226.252.78: Preemtible Kernel
 202.228.229.72: O(1) scheduler
