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Synchronization Mechanism without busy waiting

All the solutions we have seen till now were intended to provide mutual exclusion with busy waiting. However, busy waiting is not the optimal allocation of resources because it keeps CPU busy all the time in checking the while loops condition continuously although the process is waiting for the critical section to become available.

All the synchronization mechanism with busy waiting are also suffering from the priority inversion problem that is there is always a possibility of spin lock whenever there is a process with the higher priority has to wait outside the critical section since the mechanism intends to execute the lower priority process in the critical section.

However these problems need a proper solution without busy waiting and priority inversion.

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