[PATCH] userns: enable tmpfs support for user namespace.

Gao feng gaofeng at cn.fujitsu.com
Wed Oct 24 07:49:23 UTC 2012


于 2012年09月20日 08:59, Eric W. Biederman 写道:
> Gao feng <gaofeng at cn.fujitsu.com> writes:
> 
>> 于 2012年09月19日 18:40, Eric W. Biederman 写道:
>>> Gao feng <gaofeng at cn.fujitsu.com> writes:
>>>
>>>> mounting tmpfs in user namespace does no harm to the host.
>>>> so enable tmpfs support for the user namespace.
>>>
>>> I think this allows escaping from memory resource limits.
>>>
>>
>> Got it,it makes sense,sorry for the noise.
> 
> No noise problem.
> 
> This is a problem that ultimately needs solving.
> 
> I putter at that end of my tree from time to time, because those are the
> more interesting problems.
> 

Hi Eric

I test the tmpfs with mem cgroup,and found the memory cgroup can limit
how many memory the tasks used through tmpfs.

So I think this problem has already been solved.

Or maybe I misunderstand what you said?

Thanks help from Glauber.

Gao


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