[Bug 1371526] Re: ceph-disk-prepare command always fails; new partition table not avaliable until reboot

[James Page]

I poked at this with some additional volumes attached to the cloud
instance:

Offending device:

ubuntu at juju-t-machine-22:~$ sudo umount /dev/vdb
ubuntu at juju-t-machine-22:~$ sudo lsof | grep vdb
jbd2/vdb-  1268             root  cwd       DIR              253,1     4096          2 /
jbd2/vdb-  1268             root  rtd       DIR              253,1     4096          2 /
jbd2/vdb-  1268             root  txt   unknown                                        /proc/1268/exe

Additional device:

ubuntu at juju-t-machine-22:~$ sudo mount /dev/vdc /mnt2
ubuntu at juju-t-machine-22:~$ sudo lsof | grep vdc
jbd2/vdc- 16058             root  cwd       DIR              253,1     4096          2 /
jbd2/vdc- 16058             root  rtd       DIR              253,1     4096          2 /
jbd2/vdc- 16058             root  txt   unknown                                        /proc/16058/exe
ubuntu at juju-t-machine-22:~$ sudo umount /dev/vdc
ubuntu at juju-t-machine-22:~$ sudo lsof | grep vdc

As you can see, the jbd2 process for vdb appears to hang around, which I
think is what is keeping the partition table locked in kernel and hence
stale.


** Also affects: linux (Ubuntu)
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1371526

Title:
  ceph-disk-prepare command always fails; new partition table not
  avaliable until reboot

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