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

[Max Krasnyansky <maxk@qualcomm.com>]

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