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    SubjectRe: [PATCH 00/10] Containers(V10): Generic Process Containers
    Quoting Paul Menage (menage@google.com):
    > On 6/4/07, Serge E. Hallyn <serue@us.ibm.com> wrote:
    > >
    > >2. I can't delete containers because of the files they contain, and
    > >am not allowed to delete those files by hand.
    > >
    >
    > You should be able to delete a container with rmdir as long as it's
    > not in use - its control files will get cleaned up automatically.
    >
    > If you're getting an EBUSY error that means that either there are
    > still tasks running in the container (look in the "tasks" file) or
    > else there's a reference counting bug somewhere.
    >
    > Can you post an example to reproduce the problem?

    here is an excerpt:

    [root@linuz11 root]# mount -t container -ocpuset cpuset /containers/
    [root@linuz11 root]# ls /containers/
    cpu_exclusive memory_pressure mems tasks
    cpus memory_pressure_enabled notify_on_release
    mem_exclusive memory_spread_page releasable
    memory_migrate memory_spread_slab release_agent
    [root@linuz11 root]# mkdir /containers/1
    [root@linuz11 root]# echo 0 > /containers/1/mems
    [root@linuz11 root]# echo 0 > /containers/1/cpus
    [root@linuz11 root]# sh
    sh-2.05b# echo $$ > /containers/1/tasks
    sh-2.05b# cat /containers/1/tasks
    4325
    4326
    sh-2.05b# exit
    [root@linuz11 root]# ls /containers/1/tasks
    /containers/1/tasks
    [root@linuz11 root]# rm -rf /containers/1
    rm: cannot remove `/containers/1/memory_spread_slab': Operation not
    permitted
    rm: cannot remove `/containers/1/memory_spread_page': Operation not
    permitted
    rm: cannot remove `/containers/1/memory_pressure': Operation not
    permitted
    rm: cannot remove `/containers/1/memory_migrate': Operation not
    permitted
    rm: cannot remove `/containers/1/mem_exclusive': Operation not permitted
    rm: cannot remove `/containers/1/cpu_exclusive': Operation not permitted
    rm: cannot remove `/containers/1/mems': Operation not permitted
    rm: cannot remove `/containers/1/cpus': Operation not permitted
    rm: cannot remove `/containers/1/releasable': Operation not permitted
    rm: cannot remove `/containers/1/notify_on_release': Operation not
    permitted
    rm: cannot remove `/containers/1/tasks': Operation not permitted

    Ah, I see the second time I typed 'ls /containers/1/tasks' instead of
    cat. When I then used cat, the file was empty, and I got an oops just
    like Pavel reported. I bet if I solve the problem he reported, then I
    solve my problem :)

    thanks,
    -serge
    -
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