Task Management
Process creation, context switching, and lifecycle management
Overview
Task management handles creation, scheduling, and destruction of kernel and user tasks. Each task has its own context including registers, memory, and stack.
Task Structure
Each task contains:
- Process ID (PID)
- CPU registers (context)
- Memory page tables
- Stack pointer and base
- State (running, ready, blocked)
- Priority level
Task Operations
Create Task
- Allocate task structure
- Set up page tables
- Allocate kernel stack
- Initialize registers
- Add to ready queue
Context Switching
Context switching saves the current task's registers and loads the next task's registers, allowing multiple tasks to share CPU time.
Key Takeaways
- ✓ Tasks encapsulate execution context
- ✓ Scheduler determines execution order
- ✓ Context switching allows multitasking
- ✓ Memory isolation via paging
- ✓ Task states manage lifecycle