Hi guys I'm reading&learning kernel codes and have a question for mmap. Many guys said mmap is good for sharing data between processes[0]. But how does mmap do that? In document, mmap is defined as: mmap(void *addr, size_t len, int prot, int flags, int fd, off_t offset) That addr is virtual address and different processes have different address space. So after put a file into memory via addr$offsett, how does another process read that data? Btw, are there some common use cases for mmap, in application layer? [0] http://stackoverflow.com/questions/258091/when-should-i-use-mmap-for-file-access Thanks :) Gareth -- To unsubscribe from this list: send the line "unsubscribe linux-newbie" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.linux-learn.org/faqs
