Process switching steps

1. mode(user) switching for each case - save process state only

2. process switching - save context PCB(control block) → to appropriate queue
1. Decide whether to do a context switch, and whether a context switch is permissible now.
2. Save all of prev’s user-mode register values (EIP, ESP, …) on prev’s kernel stack.
3. Find the best process to schedule for execution using the process scheduling algorithm.
4. Switch from the address space of prev to the address space of next
• Switching the Page Global Directory to install a new address space
1. Switch from the kernel stack of prev to the kernel stack of next
2. Switch from the hardware context of prev to the hardware context of next.

3. update state of process → update mm structure

 

 

 

 

 

 

 

 

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Engineering/Hardware Engineering/Computer/Operating System/OS Structure/Process/Process Scheduling/Task Switching/Process switching/

Process switching steps