Condition For Deadlock Occurrence


  • 7 Feb, 2012

    Deadlock can arise if four conditions hold simultaneously.Mutual exclusion: only one process at a time can use a resource.Hold and wait: a process holding at least one resource is waiting to acquire additional resources held by other processes.No preemption: a resource can be released only voluntarily by the process holding it, after that process has completed its task.Circular wait: there exists a set {P0, P1, ?, P0} of waiting processes such that P0 is waiting for a resource that is held by P1, P1 is waiting for a resource that is held by P2, Pn1 is waiting for a resource that is held byPn, and P0 is waiting for a resource that is held by P0.

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