Just to note, 'mountall' also clears that mtab entry, but it also nukes contents of /tmp in the process, which might not be good if someone is running Passenger, which apparently keeps socket files in there (i.e. /tmp/passenger.1.0.xxx/generation-0/request )
-- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to ureadahead in Ubuntu. https://bugs.launchpad.net/bugs/1659684 Title: Leftover mount in /etc/mtab pointing to /var/lib/ureadahead/debugfs/tracing after some runs of apt dist- upgrade followed by a reboot Status in ureadahead package in Ubuntu: New Bug description: After a patching and a reboot cycle (possibly only the ones that involve running ureadahead triggers) a leftover mount entry is present in /etc/mtab pointing to /var/lib/ureadahead/debugfs/tracing root@localhost:~$ mount /dev/mapper/sysvg-root on / type ext4 (rw,errors=remount-ro) proc on /proc type proc (rw,noexec,nosuid,nodev) sysfs on /sys type sysfs (rw,noexec,nosuid,nodev) none on /sys/fs/cgroup type tmpfs (rw) none on /sys/fs/fuse/connections type fusectl (rw) none on /sys/kernel/debug type debugfs (rw) none on /sys/kernel/security type securityfs (rw) udev on /dev type devtmpfs (rw,mode=0755) devpts on /dev/pts type devpts (rw,noexec,nosuid,gid=5,mode=0620) tmpfs on /run type tmpfs (rw,noexec,nosuid,size=10%,mode=0755) none on /run/lock type tmpfs (rw,noexec,nosuid,nodev,size=5242880) none on /run/shm type tmpfs (rw,nosuid,nodev) none on /run/user type tmpfs (rw,noexec,nosuid,nodev,size=104857600,mode=0755) none on /sys/fs/pstore type pstore (rw) tracefs on /var/lib/ureadahead/debugfs/tracing type tracefs (rw,relatime) /dev/sda1 on /boot type ext4 (rw) systemd on /sys/fs/cgroup/systemd type cgroup (rw,noexec,nosuid,nodev,none,name=systemd) root@localhost:~$ mount | grep tracefs tracefs on /var/lib/ureadahead/debugfs/tracing type tracefs (rw,relatime) But that mount point doesn't exist root@localhost:~$ ls -lha /var/lib/ureadahead/debugfs/ total 8.0K drwxr-xr-x 2 root root 4.0K Jan 27 11:36 . drwxr-xr-x 3 root root 4.0K Jan 27 11:16 .. That mtab entry can be removed by running 'umount /var/lib/ureadahead/debugfs/tracing', but only after creating that mount point first root@localhost:~$ mkdir /var/lib/ureadahead/debugfs/tracing root@localhost:~$ ls -lh /var/lib/ureadahead/debugfs/ total 4.0K drwxr-xr-x 2 root root 4.0K Jan 27 11:28 tracing root@localhost:~$ umount /var/lib/ureadahead/debugfs/tracing umount: /var/lib/ureadahead/debugfs/tracing: not mounted root@localhost:~$ mount | grep tracefs root@localhost:~$ mount /dev/mapper/sysvg-root on / type ext4 (rw,errors=remount-ro) proc on /proc type proc (rw,noexec,nosuid,nodev) sysfs on /sys type sysfs (rw,noexec,nosuid,nodev) none on /sys/fs/cgroup type tmpfs (rw) none on /sys/fs/fuse/connections type fusectl (rw) none on /sys/kernel/debug type debugfs (rw) none on /sys/kernel/security type securityfs (rw) udev on /dev type devtmpfs (rw,mode=0755) devpts on /dev/pts type devpts (rw,noexec,nosuid,gid=5,mode=0620) tmpfs on /run type tmpfs (rw,noexec,nosuid,size=10%,mode=0755) none on /run/lock type tmpfs (rw,noexec,nosuid,nodev,size=5242880) none on /run/shm type tmpfs (rw,nosuid,nodev) none on /run/user type tmpfs (rw,noexec,nosuid,nodev,size=104857600,mode=0755) none on /sys/fs/pstore type pstore (rw) /dev/sda1 on /boot type ext4 (rw) systemd on /sys/fs/cgroup/systemd type cgroup (rw,noexec,nosuid,nodev,none,name=systemd) I'm experiencing this on several Ubuntu 14.04 servers, running on a VMware cluster. Package versions worth noting are: ureadahead 0.100.0-16 linux-image-4.4.0-59-generic 4.4.0-59.80~14.04.1 open-vm-tools 2:9.4.0-1280544-5ubuntu6.2 This also causes #1516451 and may be related to #499773 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ureadahead/+bug/1659684/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
