I, or rather smb :) was wondering what could still be mounted that would prevent an overmount, so I added another debug output, that of `mount` right after `mount -n -o move /dev ${rootmnt}/dev`:
Begin: Running /scripts/init-bottom ... rootfs on / type rootfs (rw) sysfs on /sys type sysfs (rw,nosuid,nodev,noexec,relatime) proc on /proc type proc (rw,nosuid,nodev,noexec,relatime) udev on /root/dev type devtmpfs (rw,relatime,size=2019088k,nr_inodes=504772,mode=755) devpts on /root/dev/pts type devpts (rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000) tmpfs on /run type tmpfs (rw,nosuid,relatime,size=811332k,mode=755) fusectl on /sys/fs/fuse/connections type fusectl (rw,relatime) /dev/vda on /root type ext4 (ro,relatime,user_xattr,acl,barrier=1,data=ordered) done. run-init: nuking initramfs contents: Directory not empty [ 6.357963] Kernel panic - not syncing: Attempted to kill init! [ 6.359092] Pid: 1, comm: run-init Not tainted 3.0.0-12-server #20-Ubuntu [ 6.360413] Call Trace: [ 6.360893] [<ffffffff815e8184>] panic+0x91/0x194 [ 6.361913] [<ffffffff810626c5>] forget_original_parent+0x245/0x250 [ 6.363086] [<ffffffff810626e7>] exit_notify+0x17/0x150 [ 6.364123] [<ffffffff81062feb>] do_exit+0x1fb/0x440 [ 6.365066] [<ffffffff81063387>] sys_exit+0x17/0x20 [ 6.366001] [<ffffffff81606c02>] system_call_fastpath+0x16/0x1b -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/613273 Title: kernel panic on ec2 in system_call_fastpath To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/initramfs-tools/+bug/613273/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs