Is there a way to clean this up when it happens? E.g. a safe way to audit and fix /etc/mtab?
** Description changed: + When the system is booted, the mountall process may notice a + temporarily-mounted file system at /var/lib/ureadahead/debugfs and + record that fact in /etc/mtab. Later in the boot process, this file + system is unmounted, but mountall doesn't record unmounts, so it never + "forgets" this path when it's unmounted. + + Mountall should if necessary remove this mount from mtab. + + To confirm on your system that it is indeed not really mounted, look for it in /proc/self/mountinfo + Otherwise this may be due to a crash of the ureadahead process during boot. + + ---- original report ---- + Binary package hint: ureadahead $ mount /dev/sda1 on / type ext3 (rw,relatime,errors=remount-ro) proc on /proc type proc (rw) none on /sys type sysfs (rw,noexec,nosuid,nodev) 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 tmpfs (rw,mode=0755) none on /dev/pts type devpts (rw,noexec,nosuid,gid=5,mode=0620) none on /dev/shm type tmpfs (rw,nosuid,nodev) none on /var/run type tmpfs (rw,nosuid,mode=0755) none on /var/lock type tmpfs (rw,noexec,nosuid,nodev) none on /lib/init/rw type tmpfs (rw,nosuid,mode=0755) none on /var/lib/ureadahead/debugfs type debugfs (rw) /dev/sda6 on /home type ext4 (rw,relatime) binfmt_misc on /proc/sys/fs/binfmt_misc type binfmt_misc (rw,noexec,nosuid,nodev) gvfs-fuse-daemon on /home/hildeb/.gvfs type fuse.gvfs-fuse-daemon (rw,nosuid,nodev,user=hildeb) /var/lib/ureadahead/debugfs is left lingering around. It's use is somewhat limited, since most Ubuntu users are not kernel developers -- if it's used as intended: http://kerneltrap.org/node/4394 ProblemType: Bug Architecture: amd64 Date: Wed Dec 23 11:04:11 2009 DistroRelease: Ubuntu 9.10 NonfreeKernelModules: nvidia Package: ureadahead 0.90.3-2 ProcEnviron: - LANG=en_US.UTF-8 - SHELL=/bin/bash + LANG=en_US.UTF-8 + SHELL=/bin/bash ProcVersionSignature: Ubuntu 2.6.31-17.54-generic SourcePackage: ureadahead Uname: Linux 2.6.31-17-generic x86_64 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/499773 Title: Race with ureadahead can mean that /var/lib/ureadahead/debugfs appears in /etc/mtab -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
