I have a question about kernel I/O cache for disk file. As I know when write() or read() is called, there s a buffer cache in kernel space for disk file I/O operation. My question is that, is this I/O buffering only applies to disk file, or it also applies to terminal, FIFO, pipe, and sockets?
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它被称为“一页的切”。 该网页由文档和“匿名页面”支持,由互换成。 这都是六氯环己烷虚拟记忆子系统的一部分。
它没有用于TTYs、 FIFOs、管道或地壳。 每个人都根据自身的性质进行自我缓冲;例如,你写给管道的数据必须在某个地方居住,然后再重新阅读。 但是,这种缓冲与后继系统毫无关系。
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请注意,这种缓冲完全独立于(例如)<代码>fwrite(<>提供的用户空间缓冲。 (我看到你早些时候提出了类似问题,不清楚你是否理解这一区别)。)
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