Most OS support “memory-mapped files” this describes files whichare mapped into the address space of a running process. Reads andwrites to the file are converted into memory reads and writes. Wecan imagine the existence of two new system calls, map() andunmap().
Q. Consider unmap; it disassociates the file from the virtualaddress space. Describe the steps that should be taken to implementthis system call. List all your assumptions.
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