File Management: Difference between revisions

Say, we have a file system service. It is responsible for keeping the File System on a Floppy/HD what so ever up to date (and eventually handle pipes and so forth...) The very basic -- the uttermost basic task of the file system service is to keep track of allocated/deallocated blocks and (in case of ext2) inodes - files, to which blocks are allocated - you also need blocks for the file/block management. Another task a file system service usually performs, is keeping blocks in memory for quick access. They are slow to retrieve from disk storage - compared to a simple memory access. So the file system service keeps the so called block cache. Now, think about it: you use paging, you have the file system service as a process of its own. It fetches blocks and keeps them in its adressaddress space.