Description of problem: When Fedora is upgraded to Fedora 18, the tmp-on-tmpfs feature hides the existing contents of /tmp. When this happened to me, I had many gigabytes of files here (copies of videos), which disappeared, but also used up space. Since the upgrading user might want these files (eg: they know it's Fedora and they know files don't get deleted until 10 days are up), I don't think it's a good idea to just delete them. Possibly they should be moved to another location (/var/tmp?)
I think this is actually a problem for all mounts in one way or another, not only /tmp, and also for /tmp not just when tmpfs is used. I think the right approach is to warn the user in all cases where we over-mount a non-empty directory. I have now changed systemd git (will enter F18 soon) to warn when we over-mount a non-empty directory. It will still continue to over-mount but mention this at LOG_NOTICE level in the logs, and hence hopefully should be noticed by the admin. http://cgit.freedesktop.org/systemd/systemd/commit/?id=257f1d8ec49046c7b481801acfdd5bf57c9efa5c
systemd-190-1.fc18 has been submitted as an update for Fedora 18. https://admin.fedoraproject.org/updates/systemd-190-1.fc18
Package systemd-191-2.fc18, rtkit-0.11-3.fc18: * should fix your issue, * was pushed to the Fedora 18 testing repository, * should be available at your local mirror within two days. Update it with: # su -c 'yum update --enablerepo=updates-testing systemd-191-2.fc18 rtkit-0.11-3.fc18' as soon as you are able to, then reboot. Please go to the following url: https://admin.fedoraproject.org/updates/FEDORA-2012-14581/rtkit-0.11-3.fc18,systemd-191-2.fc18 then log in and leave karma (feedback).
Package glibc-2.16-17.fc18, systemd-192-1.fc18, selinux-policy-3.11.1-23.fc18, rtkit-0.11-3.fc18: * should fix your issue, * was pushed to the Fedora 18 testing repository, * should be available at your local mirror within two days. Update it with: # su -c 'yum update --enablerepo=updates-testing glibc-2.16-17.fc18 systemd-192-1.fc18 selinux-policy-3.11.1-23.fc18 rtkit-0.11-3.fc18' as soon as you are able to, then reboot. Please go to the following url: https://admin.fedoraproject.org/updates/FEDORA-2012-14581/selinux-policy-3.11.1-23.fc18,rtkit-0.11-3.fc18,systemd-192-1.fc18,glibc-2.16-17.fc18 then log in and leave karma (feedback).
Package glibc-2.16-17.fc18, rtkit-0.11-3.fc18, systemd-193-1.fc18: * should fix your issue, * was pushed to the Fedora 18 testing repository, * should be available at your local mirror within two days. Update it with: # su -c 'yum update --enablerepo=updates-testing glibc-2.16-17.fc18 rtkit-0.11-3.fc18 systemd-193-1.fc18' as soon as you are able to, then reboot. Please go to the following url: https://admin.fedoraproject.org/updates/FEDORA-2012-14581/rtkit-0.11-3.fc18,systemd-193-1.fc18,glibc-2.16-17.fc18 then log in and leave karma (feedback).
systemd-44-20.fc17 has been submitted as an update for Fedora 17. https://admin.fedoraproject.org/updates/systemd-44-20.fc17