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我非常了解死锁的概念,但是当我遇到像下面这样的问题时,我不确定如何解决它。我可以绘制资源分配图,但我不确定如何从那里解决它。

有没有更好更正式的方法来解决这个问题?

Consider  a  system  with  five  processes,  P1  through P5,  and  five 
resources, R1 through R5. Resource ownership is as follows. 

•  P1 holds R1 and wants R3 
•  P2 holds R2 and wants R1 
•  P3 holds R3 and wants R5 
•  P4 holds R5 and wants R2 
•  P5 holds R4 and wants R2 

这个系统是不是死锁了?证明你的答案。
如果系统死锁,列出涉及的进程。

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