Linux pv操作的相关内容

文章 2024-05-11 来自：开发者社区

linux信号量与PV操作知识点总结

信号量信号量(semaphore) 与已经介绍过的 IPC 结构不同，它是一个计数器，信号量用于实现进程间的与斥与同步，而不是用于存储进程间通信数据。 1、特点（1）信号量用于进程间同步，若要在进程间传递数据需要结合共享内存（2）信号量基于操作系统的 PV 操作，程序对信号量的操作都是原了操作。（3）每次对信号量的 PV 操作不仅限于对信号量值加 ...

文章 2017-11-12 来自：开发者社区

pvcreate PV创建 pvmove 将PV上存储数据PE的数据移动到其他PE上。 pvresize 重设PV的大小 pvdiplay 查看PC详细信息 pvremove 删除PV pvscan 扫描PV pvck 检测PV pvs PV摘要信息创建PV -v 显示过程 -f 强制创建PV -u 手动指定UUID -y 所有问题的回答都是yes 演示使用分区作为硬盘，这里与RAID一样需要....

问答 2016-06-06 来自：开发者社区

想请问linux应用程序使用信号量实现PV操作的问题

我的问题是，比如实现进程的同步，我在创建子进程之间创建信号量，在fork之后，不是父子进程拥有独立的数据空间吗？那么父子进程的PV操作如何影响同一个信号量的呢，比如父进程先P操作，若信号量初始值为0，此时为0-1=-1，但是这个不是父进程的吗？子进程为什么其中的信号量也-1了呢？

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更新时间 2024-05-23 23:29:39

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