Consider two processes, P1 and P2, and two resources namely the printer and the memory. However, each process needs access to both resources to perform part of its function. The OS assigns memory to P2, and the printer to P1. Each process is waiting for one of the two resources. Neither will release the resource that it already owns until it has acquired the other resource and performed the function requiring both resources. 6.3 What can be done to avoid such a problem when it occurs?

Computer Networking: A Top-Down Approach (7th Edition)
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Author:James Kurose, Keith Ross
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Consider two processes, P1 and P2, and two resources namely the printer and the memory. However, each process needs access to both resources to perform part of its function. The OS assigns memory to P2, and the printer to P1. Each process is waiting for one of the two resources. Neither will release
the resource that it already owns until it has acquired the other resource and performed the function requiring both resources.

6.3 What can be done to avoid such a problem when it occurs?

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