mo...@rodents-montreal.org (Mouse) writes: >Perhaps, but that's equally true of every other mount operation >(except, to a partial extent, union mounts). Why would mount_mfs get >special treatment? I don't see any chdir call in, for example, >mount_ffs.
mount_ffs applies the mount system call and exits. mount_mfs forks a background process that has the "memory disk" mapped and that terminates when you umount. While the chdir() isn't necessary, it avoids keeping the current directory busy. mount does a realpath() to resolve relative mount paths, not sure since when..
