Comment 14 for bug 499773

It's still happening in natty:

$ df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda1 106G 62G 39G 62% /
none 2,0G 296K 2,0G 1% /dev
none 2,0G 5,2M 2,0G 1% /dev/shm
none 2,0G 128K 2,0G 1% /var/run
none 2,0G 0 2,0G 0% /var/lock
none 106G 62G 39G 62% /var/lib/ureadahead/debugfs

$ ps auxwww|grep ureadahead
hildeb 26013 0.0 0.0 10396 924 pts/1 S+ 15:18 0:00 grep ureadahead

$ cat /proc/mounts
rootfs / rootfs rw 0 0
none /sys sysfs rw,nosuid,nodev,noexec,relatime 0 0
none /proc proc rw,nosuid,nodev,noexec,relatime 0 0
none /dev devtmpfs rw,relatime,size=2016252k,nr_inodes=504063,mode=755 0 0
none /dev/pts devpts rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000 0 0
fusectl /sys/fs/fuse/connections fusectl rw,relatime 0 0
/dev/disk/by-uuid/d3877693-43c0-45cc-821c-6c4dcd692cde / ext4 rw,noatime,errors=remount-ro,barrier=1,data=ordered 0 0
none /sys/kernel/debug debugfs rw,relatime 0 0
none /sys/kernel/security securityfs rw,relatime 0 0
none /dev/shm tmpfs rw,nosuid,nodev,relatime 0 0
none /var/run tmpfs rw,nosuid,relatime,mode=755 0 0
none /var/lock tmpfs rw,nosuid,nodev,noexec,relatime 0 0
binfmt_misc /proc/sys/fs/binfmt_misc binfmt_misc rw,nosuid,nodev,noexec,relatime 0 0
gvfs-fuse-daemon /home/hildeb/.gvfs fuse.gvfs-fuse-daemon rw,nosuid,nodev,relatime,user_id=1000,group_id=1000 0 0