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    SubjectRe: [RFC][PATCH] CGroups: Add a per-subsystem hierarchy lock


    Max Krasnyansky wrote:
    >
    > Paul Menage wrote:
    >> On Tue, Jul 1, 2008 at 8:55 PM, Max Krasnyansky <maxk@qualcomm.com> wrote:
    >>> I was about to say "yeah, looks good" and then tried a couple of
    >>> different hot-plug scenarious.
    >>> We still have circular locking even with your patch
    >>>
    >> What sequence of actions do you do? I've not been able to reproduce a
    >> lockdep failure.
    >
    > mkdir /dev/cpuset
    > mount -t cgroup -o cpuset cpuset /dev/cpuset
    > mkdir /dev/cpuset/0
    > mkdir /dev/cpuset/1
    > echo 0-2 > /dev/cpuset/0/cpuset.cpus
    > echo 3 > /dev/cpuset/1/cpuset.cpus
    > echo 0 > /dev/cpuset/cpuset.sched_load_balance
    > echo 0 > /sys/devices/system/cpu/cpu3/online
    >
    > I just tried it again and got exact same lockdep output that I sent before.

    Paul, any luck with that ?

    Max


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