6.2.3 Violation of No preemption and Circular Wait for Deadlock Prevention in operating system
Violation of no preemption for deadlock prevention is possible through prevention of resources from processes when processes are in waiting state. Here most important is we can't preempt resources forcefully when processes are in execution.
Violation of circular wait is possible by allocating natural numbers to all resources and then after implementing a accessing sequence in ascending order.
Deadlock Prevention, Deadlock Avoidance, Deadlock Detection and Recovery, Deadlock Avoidance are methods for handling a deadlock.
Actually Deadlock Prevention and Deadlock Avoidance can be used before system enters in deadlock state. where as Deadlock Detection and Recovery can be used after system reach in deadlock state.
Deadlock can be prevented by violating any one necessary conditions to occurs deadlock. These necessary conditions are mutual exclusion, hod and wait, no preemption and circular wait.
1 What is deadlock
• 6.1.1 What is Deadlock in operating s...
2 Necessary Conditions for deadlock
• 6.1.2 Necessary Conditions for Deadlo...
3 Resource allocation graph
• 6.1.3 Resource Allocation Graph for D...
4 Methods handling deadlock
• 6.1.4 Methods for handling a deadlock...
5 Deadlock prevention
• 6.2.1 Deadlock Prevention method in O...
6 Violation of mutual exclusion and hold & wait
• 6.2.2 Violation of mutual exclusion a...
7 Violation of no preemption and circular wait
• 6.2.3 Violation of No preemption and ...
8 Safe state for deadlock avoidance
• 6.3.1 Safe State I Deadlock Avoidance
9 Resource allocation graph for deadlock avoidance
• 6.3.2 Resource Allocation graph algor...
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