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Chapter 7: Deadlocks

, Galvin and Gagne 2009 Operating System Concepts with Java 8thEditionChapter 7: , Galvin and Gagne 2009 Operating System Concepts with Java 8thEditionChapter 7: DeadlocksnThe deadlock ProblemnSystem ModelnDeadlock CharacterizationnMethods for Handling DeadlocksnDeadlock PreventionnDeadlock AvoidancenDeadlock Detection nRecovery from deadlock , Galvin and Gagne 2009 Operating System Concepts with Java 8thEditionChapter ObjectivesnTo develop a description of Deadlocks , which prevent sets of concurrent processes from completing their tasksnTo present a number of different methods for preventing or avoiding Deadlocks in a computer , Galvin and Gagne 2009 Operating System Concepts with Java 8thEditionThe deadlock ProblemnA set of blocked processes each holdinga resource and waitingto acquire a resource held by another process in the setnExample lSystem has 2 disk driveslP1and P2each hold one disk drive and each needs another onenExample lsemaphores AandB, initialized to 1P0P1acquire(A);acquire(B)acquire(B).

Operating System Concepts with Java –8thEdition 7.3 Silberschatz, Galvin and Gagne ©2009 Chapter Objectives nTo develop a description of deadlocks, which prevent sets of concurrent processes from completing their tasks nTo present a number of different methods for preventing or avoiding deadlocks in a

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