Deadlocks
Deadlocks in computing systems represent a significant challenge where processes are unable to proceed because each is waiting for a resource held by another. The chapter outlines the four fundamental conditions that lead to deadlocks, delves into strategies for deadlock prevention and avoidance, and describes methods for deadlock detection and recovery. A prominent focus is on the Banker's Algorithm, which ensures resource requests do not lead to an unsafe state, and recovery strategies for handling detected deadlocks effectively.
Sections
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What we have learnt
- A deadlock occurs when a set of processes are blocked, each waiting for a resource held by another in the set.
- The four necessary conditions for a deadlock to occur are mutual exclusion, hold and wait, no preemption, and circular wait.
- Deadlock management strategies include prevention, avoidance, detection, and recovery.
Key Concepts
- -- Deadlock
- A state where a set of processes are unable to proceed because each is waiting for a resource held by another.
- -- ResourceAllocation Graph
- A graphical representation that illustrates the state of resource allocation and requests within a system.
- -- Banker's Algorithm
- A deadlock avoidance algorithm that simulates resource requests to ensure a system remains in a safe state.
- -- Deadlock Prevention
- Strategies designed to eliminate the possibility of deadlocks by ensuring one of the four necessary conditions for deadlock is never met.
- -- Deadlock Detection
- Techniques used to identify when a deadlock has occurred in a system.
- -- Deadlock Recovery
- Mechanisms employed to break deadlocks once detected, restoring system function.
Additional Learning Materials
Supplementary resources to enhance your learning experience.