Question

Why do kernel modules generally perform better than user-space device drivers?

Name and define five sections of the process space.

Answer 1

kernel modules generally perform better than user-space device drivers because

• Kernel modules have separate address space
• They can share data
• They have higher execution privilege.
• Kernel modules do not execute sequentially in order to serve future requests
• They can be interrupted

When private addresses are allocated to a process by other processes, inorder to avoid storage violation and to protect access to those provate addresses, Operating systems implements Memory Protection. This private space is called Process Space.

Five sections of the process space are
1. Text segment
2. Initialized data segment
3. Uninitialized data segment
4. Stack
5. Heap