【作業系統】Deadlocks Part 1

Deadlocks can be characterized by four necessary conditions: 1. Mutual Exclusion 2. Hold and Wait 3. No Preemption 4. Circular Wait

預防死結(deadlock prevention):確保死結必要條件有一項不會發生 · 避免死結(deadlock avoidance):要求作業系統能先取得行程將會要求的資源，作業系統可以決定行程的要求可以 ...

Deadlock Prevention · Pre-allocate all resources before executing · Low resource utilization, and starvation is possible.

System如果在safe state，那他一定沒有deadlock，但如果在unsafe state，那他就有可能會發生deadlock。Avoidance就是確保system不會進到unsafe state。 Avoidance的演算法分為 ...

Deadlock prevention簡單來說就是打破必要條件四項之一，即可保證Deadlock 永不發生。 Deadlock avoidance的辦法是當process 提出資源申請時，OS 會執行Banker algorithm 來 ...

This section explores strategies to handle deadlocks, including prevention, avoidance, detection, and recovery methods.

Instead of just setting rules like in deadlock prevention, deadlock avoidance continuously monitors the state of the system and makes decisions ...

Deadlock Prevention means blocking one of the conditions necessary for deadlock while deadlock avoidance refers to managing resource allocation ...

本章的討論會以prevention 與avoidance 為主。 Deadlock Prevention. Deadlock Prevention 是將死結發生的必要條件擇一去除，從根本防範死結發生。