Comment 1 for bug 880968

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Serge Hallyn (serge-hallyn) wrote : Re: natty containers do not shut down - ureadahead task keeps running

when I type 'poweroff' in a natty container, I sometimes (not always) see:

umount2: Device or resource busy
umount: /var/lib/ureadahead/debugfs busy - remounted read-only
   ...done.
mount: / is busy
 * Will now halt

Don't see this with oneiric or lucid containers.