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

Paul Menage wrote:
> On Tue, Jul 1, 2008 at 8:55 PM, Max Krasnyansky <> 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.


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