[Devel] Re: [PATCH 3/5] Container Freezer: Implement freezer cgroup subsystem

[Li Zefan]

Paul Menage wrote:
> On Mon, Nov 3, 2008 at 10:12 PM, Li Zefan <lizf at cn.fujitsu.com> wrote:
>> I think another reasonable and easier way is to disable writing freezer.state
>> of top cgroup, so we can skip checks in freezer_fork() for tasks in top cgroup.
>>
> 
> Yes, if freezing the root cgroup isn't needed then that is definitely
> simpler - I wasn't sure if Matt wanted to be able to freeze the root
> group with this subsystem.
> 

If someone just mounts the freezer subsystem and freeze the root cgroup,
all the tasks will be freezed, and then seems all he can do is reset the
machine (or do a suspend/resume).

That's why I think it's reasonable to disable it.
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