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From: Gao feng <gaofeng-BthXqXjhjHXQFUHtdCDX3A@public.gmane.org>
To: "Eric W. Biederman" <ebiederm-aS9lmoZGLiVWk0Htik3J/w@public.gmane.org>
Cc: containers-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org
Subject: Re: [PATCH] userns: enable tmpfs support for user namespace.
Date: Wed, 24 Oct 2012 15:49:23 +0800	[thread overview]
Message-ID: <50879D83.2050905@cn.fujitsu.com> (raw)
In-Reply-To: <874nmt5x1r.fsf-aS9lmoZGLiVWk0Htik3J/w@public.gmane.org>

于 2012年09月20日 08:59, Eric W. Biederman 写道:
> Gao feng <gaofeng@cn.fujitsu.com> writes:
> 
>> 于 2012年09月19日 18:40, Eric W. Biederman 写道:
>>> Gao feng <gaofeng@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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      parent reply	other threads:[~2012-10-24  7:49 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-09-19  8:16 [PATCH] userns: enable tmpfs support for user namespace Gao feng
     [not found] ` <1348042588-9031-1-git-send-email-gaofeng-BthXqXjhjHXQFUHtdCDX3A@public.gmane.org>
2012-09-19 10:40   ` Eric W. Biederman
     [not found]     ` <87wqzq8fe3.fsf-aS9lmoZGLiVWk0Htik3J/w@public.gmane.org>
2012-09-20  0:39       ` Gao feng
     [not found]         ` <505A65AB.4000703-BthXqXjhjHXQFUHtdCDX3A@public.gmane.org>
2012-09-20  0:59           ` Eric W. Biederman
     [not found]             ` <874nmt5x1r.fsf-aS9lmoZGLiVWk0Htik3J/w@public.gmane.org>
2012-10-24  7:49               ` Gao feng [this message]

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