• Welcome to the world's largest Chinese hacker forum

    Welcome to the world's largest Chinese hacker forum, our forum registration is open! You can now register for technical communication with us, this is a free and open to the world of the BBS, we founded the purpose for the study of network security, please don't release business of black/grey, or on the BBS posts, to seek help hacker if violations, we will permanently frozen your IP and account, thank you for your cooperation. Hacker attack and defense cracking or network Security

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破坏互斥条件:

将关键资源转化为共享资源(如假脱机技术)

缺点:可行性不高,很多情况下互斥条件无法打破。

不剥夺条件:

第一,当申请的资金得不到满足时,立即释放所有资源。

第二,当申请的资金被其他进程占用时,操作系统会协助剥夺(考虑优先级)。

缺点:实现复杂;资源的剥夺可能导致某些工作的失败;

重复应用和释放导致高系统开销;可能会引起饥饿。

请求和维护条件:

在运行之前分配所有需要的资源,并在运行之后保留它们。

缺点:资源利用率低;可能会引起饥饿。

打破循环等待条件:

对资源进行编号,必须按照编号从小到大的顺序申请资源。

缺点:添加新设备不方便;导致资金浪费;用户编程故障

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