Comment 68 for bug 857651

Micheal Waltz (ecliptik) wrote :

This bug also causes all users home directories to mount if they're setup in autofs. This is especially detrimental if your autofs maps contain thousands of users. Lightdm and autofs will slowly grind through mounting home directories looking for:

~/.dmrc
~/.face
~/.face.icon

These mounts stay around in /etc/mtab, which causes reboots/shutdowns to take extremely long while the system then umounts all the directories.

This not only affects the local system, but if hundreds of systems in an environment are doing this it causes unnecessary load on backend services.