Re: [PATCH v4 cgroup/for-3.7] cgroup: mark subsystems with broken hierarchy support and whine if cgroups are nested for them

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On 09/14/2012 12:03 AM, Tejun Heo wrote:
> Hello, Vivek.
> 
> On Thu, Sep 13, 2012 at 03:41:11PM -0400, Vivek Goyal wrote:
>> I think for blkio controller, first level of creation itself is wrong if
>> hierarchy is not supported. 
>>
>> 				root
>> 			       / | \ 
>>                               T1 T2 G1
>>

I side with Vivek, and I think we should warn first level. It just tends
to be wrong. If memcg is a special case, just special case it.
_but_, I see no reason not to do it.

While I agree with Michal point that this is not necessary, I don't
think being noisier than we need to be is a crime. Less noisy certainly
can be.

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