From: Johannes Weiner <hannes-druUgvl0LCNAfugRpC6u6w@public.gmane.org>
To: Tejun Heo <tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Cc: Michal Hocko <mhocko-AlSwsSmVLrQ@public.gmane.org>,
bsingharora-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org,
cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-mm-Bw31MaZKKs3YtjvyW6yDsg@public.gmane.org,
lizefan-hv44wF8Li93QT0dZR+AlfA@public.gmane.org
Subject: Re: [PATCH 3/3] memcg: simplify mem_cgroup_reclaim_iter
Date: Wed, 5 Jun 2013 10:50:21 -0400 [thread overview]
Message-ID: <20130605145021.GR15576@cmpxchg.org> (raw)
In-Reply-To: <20130605143949.GQ15576-druUgvl0LCNAfugRpC6u6w@public.gmane.org>
On Wed, Jun 05, 2013 at 10:39:49AM -0400, Johannes Weiner wrote:
> On Wed, Jun 05, 2013 at 01:20:23AM -0700, Tejun Heo wrote:
> > Hello, Michal.
> >
> > On Wed, Jun 05, 2013 at 09:30:23AM +0200, Michal Hocko wrote:
> > > > We aren't talking about something gigantic or can
> > >
> > > mem_cgroup is 888B now (depending on configuration). So I wouldn't call
> > > it negligible.
> >
> > Do you think that the number can actually grow harmful? Would you be
> > kind enough to share some calculations with me?
>
> 5k cgroups * say 10 priority levels * 1k struct mem_cgroup may pin 51M
> of dead struct mem_cgroup, plus whatever else the css pins.
Bleh, ... * nr_node_ids * MAX_NR_ZONES. So it is a couple hundred MB
in that case.
WARNING: multiple messages have this Message-ID (diff)
From: Johannes Weiner <hannes@cmpxchg.org>
To: Tejun Heo <tj@kernel.org>
Cc: Michal Hocko <mhocko@suse.cz>,
bsingharora@gmail.com, cgroups@vger.kernel.org,
linux-mm@kvack.org, lizefan@huawei.com
Subject: Re: [PATCH 3/3] memcg: simplify mem_cgroup_reclaim_iter
Date: Wed, 5 Jun 2013 10:50:21 -0400 [thread overview]
Message-ID: <20130605145021.GR15576@cmpxchg.org> (raw)
In-Reply-To: <20130605143949.GQ15576@cmpxchg.org>
On Wed, Jun 05, 2013 at 10:39:49AM -0400, Johannes Weiner wrote:
> On Wed, Jun 05, 2013 at 01:20:23AM -0700, Tejun Heo wrote:
> > Hello, Michal.
> >
> > On Wed, Jun 05, 2013 at 09:30:23AM +0200, Michal Hocko wrote:
> > > > We aren't talking about something gigantic or can
> > >
> > > mem_cgroup is 888B now (depending on configuration). So I wouldn't call
> > > it negligible.
> >
> > Do you think that the number can actually grow harmful? Would you be
> > kind enough to share some calculations with me?
>
> 5k cgroups * say 10 priority levels * 1k struct mem_cgroup may pin 51M
> of dead struct mem_cgroup, plus whatever else the css pins.
Bleh, ... * nr_node_ids * MAX_NR_ZONES. So it is a couple hundred MB
in that case.
--
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next prev parent reply other threads:[~2013-06-05 14:50 UTC|newest]
Thread overview: 61+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-04 0:44 [PATCHSET] memcg: fix and reimplement iterator Tejun Heo
2013-06-04 0:44 ` Tejun Heo
[not found] ` <1370306679-13129-1-git-send-email-tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
2013-06-04 0:44 ` [PATCH 1/3] memcg: fix subtle memory barrier bug in mem_cgroup_iter() Tejun Heo
2013-06-04 0:44 ` Tejun Heo
2013-06-04 13:03 ` Michal Hocko
[not found] ` <20130604130336.GE31242-2MMpYkNvuYDjFM9bn6wA6Q@public.gmane.org>
2013-06-04 13:58 ` Johannes Weiner
2013-06-04 13:58 ` Johannes Weiner
2013-06-04 15:29 ` Michal Hocko
2013-06-04 0:44 ` [PATCH 2/3] memcg: restructure mem_cgroup_iter() Tejun Heo
2013-06-04 0:44 ` Tejun Heo
[not found] ` <1370306679-13129-3-git-send-email-tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
2013-06-04 13:21 ` Michal Hocko
2013-06-04 13:21 ` Michal Hocko
2013-06-04 20:51 ` Tejun Heo
2013-06-04 0:44 ` [PATCH 3/3] memcg: simplify mem_cgroup_reclaim_iter Tejun Heo
2013-06-04 0:44 ` Tejun Heo
[not found] ` <1370306679-13129-4-git-send-email-tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
2013-06-04 13:18 ` Michal Hocko
2013-06-04 13:18 ` Michal Hocko
[not found] ` <20130604131843.GF31242-2MMpYkNvuYDjFM9bn6wA6Q@public.gmane.org>
2013-06-04 20:50 ` Tejun Heo
2013-06-04 20:50 ` Tejun Heo
2013-06-04 21:28 ` Michal Hocko
2013-06-04 21:55 ` Tejun Heo
2013-06-05 7:30 ` Michal Hocko
2013-06-05 8:20 ` Tejun Heo
2013-06-05 8:36 ` Michal Hocko
2013-06-05 8:44 ` Tejun Heo
2013-06-05 8:55 ` Michal Hocko
2013-06-05 9:03 ` Tejun Heo
[not found] ` <20130605082023.GG7303-9pTldWuhBndy/B6EtB590w@public.gmane.org>
2013-06-05 14:39 ` Johannes Weiner
2013-06-05 14:39 ` Johannes Weiner
[not found] ` <20130605143949.GQ15576-druUgvl0LCNAfugRpC6u6w@public.gmane.org>
2013-06-05 14:50 ` Johannes Weiner [this message]
2013-06-05 14:50 ` Johannes Weiner
2013-06-05 17:22 ` Tejun Heo
2013-06-05 17:22 ` Tejun Heo
[not found] ` <20130605172212.GA10693-9pTldWuhBndy/B6EtB590w@public.gmane.org>
2013-06-05 19:45 ` Johannes Weiner
2013-06-05 19:45 ` Johannes Weiner
[not found] ` <20130605194552.GI15721-druUgvl0LCNAfugRpC6u6w@public.gmane.org>
2013-06-05 20:06 ` Tejun Heo
2013-06-05 20:06 ` Tejun Heo
2013-06-05 21:17 ` Johannes Weiner
2013-06-05 22:20 ` Tejun Heo
[not found] ` <20130605222021.GL10693-9pTldWuhBndy/B6EtB590w@public.gmane.org>
2013-06-05 22:27 ` Tejun Heo
2013-06-05 22:27 ` Tejun Heo
2013-06-06 11:50 ` Michal Hocko
2013-06-07 0:52 ` Tejun Heo
[not found] ` <20130607005242.GB16160-Gd/HAXX7CRxy/B6EtB590w@public.gmane.org>
2013-06-07 7:37 ` Michal Hocko
2013-06-07 7:37 ` Michal Hocko
2013-06-07 23:25 ` Tejun Heo
[not found] ` <20130607232557.GL14781-9pTldWuhBndy/B6EtB590w@public.gmane.org>
2013-06-10 8:02 ` Michal Hocko
2013-06-10 8:02 ` Michal Hocko
2013-06-10 19:54 ` Tejun Heo
2013-06-10 20:48 ` Michal Hocko
[not found] ` <20130610204801.GA21003-2MMpYkNvuYDjFM9bn6wA6Q@public.gmane.org>
2013-06-10 23:13 ` Tejun Heo
2013-06-10 23:13 ` Tejun Heo
2013-06-11 7:27 ` Michal Hocko
2013-06-11 7:44 ` Tejun Heo
[not found] ` <20130611074404.GE22530-9pTldWuhBndy/B6EtB590w@public.gmane.org>
2013-06-11 7:55 ` Michal Hocko
2013-06-11 7:55 ` Michal Hocko
2013-06-11 8:00 ` Tejun Heo
2013-06-05 14:56 ` Michal Hocko
2013-06-04 21:40 ` Johannes Weiner
[not found] ` <20130604214050.GP15576-druUgvl0LCNAfugRpC6u6w@public.gmane.org>
2013-06-04 21:49 ` Tejun Heo
2013-06-04 21:49 ` Tejun Heo
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