From: Michal Hocko <mhocko@suse.cz>
To: Konstantin Khlebnikov <khlebnikov@openvz.org>
Cc: Sha Zhengju <handai.szj@gmail.com>,
cgroups@vger.kernel.org, linux-mm@kvack.org,
kamezawa.hiroyu@jp.fujitsu.com, akpm@linux-foundation.org,
hughd@google.com, gthelen@google.com,
Sha Zhengju <handai.szj@taobao.com>
Subject: Re: [PATCH V2 0/3] memcg: simply lock of page stat accounting
Date: Wed, 15 May 2013 15:41:10 +0200 [thread overview]
Message-ID: <20130515134110.GD5455@dhcp22.suse.cz> (raw)
In-Reply-To: <519380FC.1040504@openvz.org>
On Wed 15-05-13 16:35:08, Konstantin Khlebnikov wrote:
> Sha Zhengju wrote:
> >Hi,
> >
> >This is my second attempt to make memcg page stat lock simpler, the
> >first version: http://www.spinics.net/lists/linux-mm/msg50037.html.
> >
> >In this version I investigate the potential race conditions among
> >page stat, move_account, charge, uncharge and try to prove it race
> >safe of my proposing lock scheme. The first patch is the basis of
> >the patchset, so if I've made some stupid mistake please do not
> >hesitate to point it out.
>
> I have a provocational question. Who needs these numbers? I mean
> per-cgroup nr_mapped and so on.
Well, I guess it makes some sense to know how much page cache and anon
memory is charged to the group. I am using that to monitor the per-group
memory usage. I can imagine a even better coverage - something
/proc/meminfo like.
--
Michal Hocko
SUSE Labs
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next prev parent reply other threads:[~2013-05-15 13:41 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-05-13 5:03 Sha Zhengju
2013-05-13 5:04 ` [PATCH V2 1/3] memcg: rewrite the comment about race condition " Sha Zhengju
2013-05-13 5:05 ` [PATCH V2 2/3] memcg: alter mem_cgroup_{update,inc,dec}_page_stat() args to memcg pointer Sha Zhengju
2013-05-13 12:25 ` Michal Hocko
2013-05-14 9:00 ` Sha Zhengju
2013-05-14 9:10 ` Michal Hocko
2013-05-14 0:15 ` Kamezawa Hiroyuki
2013-05-14 9:03 ` Sha Zhengju
2013-05-13 5:05 ` [PATCH V2 3/3] memcg: simplify lock of memcg page stat account Sha Zhengju
2013-05-13 13:12 ` Michal Hocko
2013-05-13 13:38 ` Michal Hocko
2013-05-14 9:13 ` Sha Zhengju
2013-05-14 9:28 ` Michal Hocko
2013-05-14 8:35 ` Sha Zhengju
2013-05-14 0:41 ` [PATCH V2 0/3] memcg: simply lock of page stat accounting Kamezawa Hiroyuki
2013-05-14 7:13 ` Michal Hocko
2013-05-15 12:35 ` Konstantin Khlebnikov
2013-05-15 13:41 ` Michal Hocko [this message]
2013-05-16 4:28 ` Konstantin Khlebnikov
2013-05-16 13:28 ` Michal Hocko
2013-05-17 5:57 ` Konstantin Khlebnikov
2013-05-17 8:38 ` Michal Hocko
2013-05-17 10:29 ` Konstantin Khlebnikov
2013-05-17 12:53 ` Michal Hocko
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