Recovery From Deadlock

• When a detection algorithm determines that a deadlock exists, several alternatives are available.
• One possibility is to inform the operator that a deadlock has occurred and to let the operator deal with the deadlock manually.
• Another possibility is to let the system recover from the deadlock automatically.
• There are two options for breaking a deadlock.
  • One is simply to abort one or more processes to break the circular wait.
  • The other is to preempt some resources from one or more of the deadlocked processes.