msync(): Used to synchronize a shared memory segment with the file system—a technique useful when mapping a file into memory.

msync()：用来让共享内存段与文件系统同步 —当把文件映射到内存时，这种技术有用。

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msync(): Used to synchronize a shared memory segment with the file system—a technique useful when mapping a file into memory.

msync()：用来让共享内存段与文件系统同步 —当把文件映射到内存时，这种技术有用。

youdao