[Devel] Re: [RFC][PATCH] freezer_cg: disable writing freezer.state of root cgroup

[Li Zefan]

Paul Menage wrote:
> On Mon, Nov 3, 2008 at 11:35 PM, Li Zefan <lizf at cn.fujitsu.com> wrote:
>> With this change, the root cgroup is unfreezable, and writing to
>> its freezer.state returns -EIO.
> 
> EINVAL might be more consistent with other systems like cpusets.
> 

Because writing FREEZE (or other invalid value) to freezer.state returns EIO..

Or that EIO should be also changed to EINVAL.

> Or maybe just skip populating the file entirely for the root cgroup?
> It's not useful if it can't be written and always returns the same
> value.
> 

I thought about this. I'll see which way Matt and Cedric prefer.

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