choice
  	prompt "Preemption Model"
  	default PREEMPT_NONE
  
  config PREEMPT_NONE
  	bool "No Forced Preemption (Server)"
  	help
  	  This is the traditional Linux preemption model, geared towards
  	  throughput. It will still provide good latencies most of the
  	  time, but there are no guarantees and occasional longer delays
  	  are possible.
  
  	  Select this option if you are building a kernel for a server or
  	  scientific/computation system, or if you want to maximize the
  	  raw processing power of the kernel, irrespective of scheduling
  	  latencies.
  
  config PREEMPT_VOLUNTARY
  	bool "Voluntary Kernel Preemption (Desktop)"
  	help
  	  This option reduces the latency of the kernel by adding more
  	  "explicit preemption points" to the kernel code. These new
  	  preemption points have been selected to reduce the maximum
  	  latency of rescheduling, providing faster application reactions,
  	  at the cost of slightly lower throughput.
  
  	  This allows reaction to interactive events by allowing a
  	  low priority process to voluntarily preempt itself even if it
  	  is in kernel mode executing a system call. This allows
  	  applications to run more 'smoothly' even when the system is
  	  under load.
  
  	  Select this if you are building a kernel for a desktop system.
  
  config PREEMPT
  	bool "Preemptible Kernel (Low-Latency Desktop)"
  	select PREEMPT_COUNT
  	select UNINLINE_SPIN_UNLOCK if !ARCH_INLINE_SPIN_UNLOCK
  	help
  	  This option reduces the latency of the kernel by making
  	  all kernel code (that is not executing in a critical section)
  	  preemptible.  This allows reaction to interactive events by
  	  permitting a low priority process to be preempted involuntarily
  	  even if it is in kernel mode executing a system call and would
  	  otherwise not be about to reach a natural preemption point.
  	  This allows applications to run more 'smoothly' even when the
  	  system is under load, at the cost of slightly lower throughput
  	  and a slight runtime overhead to kernel code.
  
  	  Select this if you are building a kernel for a desktop or
  	  embedded system with latency requirements in the milliseconds
  	  range.
  
  endchoice
  
  config PREEMPT_COUNT
         bool