From: KOSAKI Motohiro <kosaki.motohiro-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
To: David Rientjes <rientjes-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
Cc: linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
mhocko-AlSwsSmVLrQ@public.gmane.org,
linux-mm-Bw31MaZKKs3YtjvyW6yDsg@public.gmane.org,
hannes-druUgvl0LCNAfugRpC6u6w@public.gmane.org,
cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
KOSAKI Motohiro
<kosaki.motohiro-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org,
containers-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org
Subject: Re: [PATCH] meminfo: show /proc/meminfo base on container's memcg
Date: Thu, 31 May 2012 02:23:26 -0400 [thread overview]
Message-ID: <4FC70E5E.1010003@gmail.com> (raw)
In-Reply-To: <alpine.DEB.2.00.1205302314190.25774-X6Q0R45D7oAcqpCFd4KODRPsWskHk0ljAL8bYrjMMd8@public.gmane.org>
(5/31/12 2:17 AM), David Rientjes wrote:
> On Thu, 31 May 2012, Kamezawa Hiroyuki wrote:
>
>>> The bottomline is that /proc/meminfo is one of many global resource state
>>> interfaces and doesn't imply that every thread has access to the full
>>> resources. It never has. It's very simple for another thread to consume
>>> a large amount of memory as soon as your read() of /proc/meminfo completes
>>> and then that information is completely bogus.
>>
>> Why you need to discuss this here ? We know all information are snapshot.
>>
>
> MemTotal is usually assumed to be static from /proc/meminfo and could now
> change radically without notification to the application.
>
>> Hmm....maybe need to mount cgroup in the container (again) and get an access
>> to cgroup
>> hierarchy and find the cgroup it belongs to......if it's allowed.
>
> An application should always know the cgroup that its attached to and be
> able to read its state using the command that I gave earlier.
No. you don't need why userland folks want namespaces. Even though you don't
need namespaces. It doesn't good reason to refuse another use case.
next prev parent reply other threads:[~2012-05-31 6:23 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1338260214-21919-1-git-send-email-gaofeng@cn.fujitsu.com>
[not found] ` <1338260214-21919-1-git-send-email-gaofeng-BthXqXjhjHXQFUHtdCDX3A@public.gmane.org>
2012-05-29 8:24 ` [PATCH] meminfo: show /proc/meminfo base on container's memcg Glauber Costa
2012-05-30 21:38 ` David Rientjes
2012-06-07 23:18 ` Zhu Yanhai
[not found] ` <alpine.DEB.2.00.1205301433490.9716@chino.kir.corp.google.com>
[not found] ` <alpine.DEB.2.00.1205301433490.9716-X6Q0R45D7oAcqpCFd4KODRPsWskHk0ljAL8bYrjMMd8@public.gmane.org>
2012-05-30 23:20 ` Kirill A. Shutemov
2012-05-31 0:08 ` Kamezawa Hiroyuki
[not found] ` <4FC6B68C.2070703-+CUm20s59erQFUHtdCDX3A@public.gmane.org>
2012-05-31 0:22 ` KOSAKI Motohiro
[not found] ` <CAHGf_=pFbsy4FO_UNu6O1-KyTd6O=pkmR8=3EGuZB5Reu3Vb9w@mail.gmail.com>
[not found] ` <CAHGf_=pFbsy4FO_UNu6O1-KyTd6O=pkmR8=3EGuZB5Reu3Vb9w-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2012-05-31 0:33 ` Kamezawa Hiroyuki
[not found] ` <4FC6BC3E.5010807@jp.fujitsu.com>
[not found] ` <4FC6BC3E.5010807-+CUm20s59erQFUHtdCDX3A@public.gmane.org>
2012-05-31 0:44 ` David Rientjes
[not found] ` <alpine.DEB.2.00.1205301737530.25774@chino.kir.corp.google.com>
[not found] ` <alpine.DEB.2.00.1205301737530.25774-X6Q0R45D7oAcqpCFd4KODRPsWskHk0ljAL8bYrjMMd8@public.gmane.org>
2012-05-31 0:53 ` Kamezawa Hiroyuki
[not found] ` <4FC6C111.2060108@jp.fujitsu.com>
[not found] ` <4FC6C111.2060108-+CUm20s59erQFUHtdCDX3A@public.gmane.org>
2012-05-31 1:31 ` David Rientjes
[not found] ` <alpine.DEB.2.00.1205301831270.25774-X6Q0R45D7oAcqpCFd4KODRPsWskHk0ljAL8bYrjMMd8@public.gmane.org>
2012-05-31 2:33 ` Kamezawa Hiroyuki
[not found] ` <4FC6D881.4090706-+CUm20s59erQFUHtdCDX3A@public.gmane.org>
2012-05-31 5:02 ` David Rientjes
[not found] ` <alpine.DEB.2.00.1205302156090.25774@chino.kir.corp.google.com>
[not found] ` <alpine.DEB.2.00.1205302156090.25774-X6Q0R45D7oAcqpCFd4KODRPsWskHk0ljAL8bYrjMMd8@public.gmane.org>
2012-05-31 5:36 ` Kamezawa Hiroyuki
[not found] ` <4FC70355.70805@jp.fujitsu.com>
[not found] ` <4FC70355.70805-+CUm20s59erQFUHtdCDX3A@public.gmane.org>
2012-05-31 6:17 ` David Rientjes
[not found] ` <alpine.DEB.2.00.1205302314190.25774-X6Q0R45D7oAcqpCFd4KODRPsWskHk0ljAL8bYrjMMd8@public.gmane.org>
2012-05-31 6:23 ` KOSAKI Motohiro [this message]
[not found] ` <4FC70E5E.1010003-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2012-05-31 6:28 ` David Rientjes
[not found] ` <alpine.DEB.2.00.1205302325500.25774-X6Q0R45D7oAcqpCFd4KODRPsWskHk0ljAL8bYrjMMd8@public.gmane.org>
2012-05-31 6:37 ` KOSAKI Motohiro
[not found] ` <4FC711A5.4090003-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2012-05-31 6:56 ` David Rientjes
[not found] ` <alpine.DEB.2.00.1205302351510.25774-X6Q0R45D7oAcqpCFd4KODRPsWskHk0ljAL8bYrjMMd8@public.gmane.org>
2012-05-31 7:09 ` KOSAKI Motohiro
[not found] ` <CAHGf_=qVDVT6VW2j9gE3bQKwizW24iivrDryiCKoxVu4m_fWKw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2012-05-31 7:35 ` David Rientjes
[not found] ` <alpine.DEB.2.00.1205310028420.8864@chino.kir.corp.google.com>
[not found] ` <alpine.DEB.2.00.1205310028420.8864-X6Q0R45D7oAcqpCFd4KODRPsWskHk0ljAL8bYrjMMd8@public.gmane.org>
2012-05-31 7:42 ` KOSAKI Motohiro
[not found] ` <4FC720EE.3010307@gmail.com>
[not found] ` <4FC720EE.3010307-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2012-05-31 7:57 ` Johannes Weiner
2012-05-31 7:58 ` Gao feng
[not found] ` <4FC724B1.70508@cn.fujitsu.com>
[not found] ` <4FC724B1.70508-BthXqXjhjHXQFUHtdCDX3A@public.gmane.org>
2012-05-31 8:32 ` Glauber Costa
[not found] ` <4FC72CA4.6080708@parallels.com>
[not found] ` <4FC72CA4.6080708-bzQdu9zFT3WakBO8gow8eQ@public.gmane.org>
2012-05-31 8:51 ` Kamezawa Hiroyuki
2012-05-31 8:55 ` Gao feng
[not found] ` <4FC73203.2070009@cn.fujitsu.com>
[not found] ` <4FC73203.2070009-BthXqXjhjHXQFUHtdCDX3A@public.gmane.org>
2012-05-31 8:56 ` Glauber Costa
[not found] ` <4FC73110.6010107@jp.fujitsu.com>
[not found] ` <4FC73110.6010107-+CUm20s59erQFUHtdCDX3A@public.gmane.org>
2012-05-31 8:59 ` Glauber Costa
2012-05-31 7:07 ` Kamezawa Hiroyuki
[not found] ` <4FC718BA.8060608@jp.fujitsu.com>
[not found] ` <4FC718BA.8060608-+CUm20s59erQFUHtdCDX3A@public.gmane.org>
2012-05-31 7:23 ` KOSAKI Motohiro
2012-05-31 8:29 ` Glauber Costa
[not found] ` <20120530232004.GA15423@shutemov.name>
[not found] ` <20120530232004.GA15423-oKw7cIdHH8eLwutG50LtGA@public.gmane.org>
2012-05-31 0:35 ` David Rientjes
2012-05-29 2:56 Gao feng
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