title: Kernel mode transition
body: <p>If I understand correctly, a memory adderss in system space is accesible only from kernel mode. Does it mean when components mapped in system space are executed the processor must be swicthed to kernel mode?</p>
  
  <p>For ex: the virtual memory manager is a frequently used component and is mapped in system space. Whenever the VMM runs in the context of user process (lets say it translated an address), does the processor must be swicthed to kernel mode?</p>
  
  <p>Thanks,
  Suresh.</p>