Important - Writing The Super-Block

If we want to avoid a busy-loop, we must implement write-super:

• Adding a new inode will dirty the super-block...
• ... so the VFS (via the update daemon) will try to write it to disk...
• ... in a loop of updating all dirty super-blocks.
• The write-super function needs to mark the super-block as non-dirty, or else the update daemon will keep trying to write it - causing the system to get stuck.

Originally written by guy keren