Banker’s algorithm: A deadlock avoidance algorithm that prevents deadlocks by making sure that processes can only request resources if they have enough resources to complete their task.Resource Allocation Graph Algorithm: A graphical algorithm that detects deadlocks by constructing a graph that represents the resource allocation and resource requests of processes.Prevention involves ensuring that at least one of the necessary conditions for deadlock doesn’t occur. There are two main approaches to detecting and preventing deadlocks: prevention and avoidance. Multiple processes competing for a limited set of resources.
Two processes, X and Y, each waiting for a resource that is held by the other process.Two processes, A and B, each holding a resource that the other needs to proceed.
Some examples of deadlock scenarios in OS are:
Circular Wait: Two or more processes are waiting for each other to release a resource. No Preemption: A resource cannot be forcibly taken from a process holding it. Hold and Wait: A process holding at least one resource is waiting to acquire additional resources held by other processes. Mutual Exclusion: A resource can only be used by one process at a time. Necessary Conditions for Deadlocks to Occurĭeadlocks can only occur when four necessary conditions are met simultaneously, known as the “four conditions for deadlock.” These conditions are: Some common types of resources that can lead to deadlocks are:ģ. Types of Resources Involved in Deadlocksĭeadlocks can occur with any type of resources that are shared between processes. In simpler terms, a deadlock occurs when two or more processes are blocked forever because each is waiting for the other to release a resource. What is Deadlock?ĭeadlock is a state of an OS where two or more processes are stuck in a situation where they can’t proceed further, waiting for a resource that another process is holding. In this article, we’ll dive deep into the topic of deadlock in OS, including what it is, how it happens, and what you can do to prevent it. 
Detection and Prevention of Deadlocksĭeadlock is a common problem in Operating Systems that occurs when two or more processes are waiting for each other to release a resource that they are holding, leading to a standstill or an infinite loop. Necessary Conditions for Deadlocks to Occur
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