From: Michal Hocko <mhocko@suse.cz>
To: Michel Lespinasse <walken@google.com>
Cc: Glauber Costa <glommer@parallels.com>, Tejun Heo <tj@kernel.org>,
Johannes Weiner <hannes@cmpxchg.org>,
Balbir Singh <bsingharora@gmail.com>,
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
cgroups@vger.kernel.org, linux-mm@kvack.org,
Hugh Dickins <hughd@google.com>, Ying Han <yinghan@google.com>,
Greg Thelen <gthelen@google.com>
Subject: Re: memcg: softlimit on internal nodes
Date: Tue, 23 Apr 2013 15:06:27 +0200 [thread overview]
Message-ID: <20130423130627.GG8001@dhcp22.suse.cz> (raw)
In-Reply-To: <CANN689FaGBi+LmdoSGBf3D9HmLD8Emma1_M3T1dARSD6=75B0w@mail.gmail.com>
On Tue 23-04-13 05:51:36, Michel Lespinasse wrote:
[...]
> The issue I see is that even when people configure soft limits B+C <
> A, your current proposal still doesn't "leave the other alone" as
> Glauber and I think we should.
If B+C < A then B resp. C get reclaimed only if A is over the limit
which means that it couldn't reclaimed enough to get bellow the limit
when we bang on it before B and C. We can update the implementation
later to be more clever in situations like this but this is not that
easy because once we get away from the round robin over the tree then we
might end up having other issues - like unfairness etc... That's why I
wanted to have this as simple as possible.
--
Michal Hocko
SUSE Labs
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next prev parent reply other threads:[~2013-04-23 13:06 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-04-20 0:26 memcg: softlimit on internal nodes Tejun Heo
2013-04-20 0:42 ` Tejun Heo
2013-04-20 3:35 ` Greg Thelen
2013-04-21 1:53 ` Tejun Heo
2013-04-20 3:16 ` Michal Hocko
2013-04-21 2:23 ` Tejun Heo
2013-04-21 8:55 ` Michel Lespinasse
2013-04-22 4:24 ` Tejun Heo
2013-04-22 7:14 ` Michel Lespinasse
2013-04-22 14:48 ` Tejun Heo
2013-04-22 15:37 ` Michal Hocko
2013-04-22 15:46 ` Tejun Heo
2013-04-22 15:54 ` Michal Hocko
2013-04-22 16:01 ` Tejun Heo
2013-04-23 9:58 ` Michel Lespinasse
2013-04-23 10:17 ` Glauber Costa
2013-04-23 11:40 ` Michal Hocko
2013-04-23 11:54 ` Glauber Costa
2013-04-23 12:51 ` Michel Lespinasse
2013-04-23 13:06 ` Michal Hocko [this message]
2013-04-23 13:13 ` Glauber Costa
2013-04-23 13:28 ` Michal Hocko
2013-04-23 11:32 ` Michal Hocko
2013-04-23 12:45 ` Michel Lespinasse
2013-04-23 12:59 ` Michal Hocko
2013-04-23 12:51 ` Michal Hocko
2013-04-21 12:46 ` Michal Hocko
2013-04-22 4:39 ` Tejun Heo
2013-04-22 15:19 ` Michal Hocko
2013-04-22 15:57 ` Tejun Heo
2013-04-22 15:57 ` Tejun Heo
2013-04-22 16:20 ` Michal Hocko
2013-04-22 18:30 ` Tejun Heo
2013-04-23 9:29 ` Michal Hocko
2013-04-23 17:09 ` Tejun Heo
2013-04-26 11:51 ` Michal Hocko
2013-04-26 18:37 ` Tejun Heo
2013-04-29 15:27 ` Michal Hocko
2013-04-23 9:33 ` [RFC v2 0/4] soft limit rework Michal Hocko
2013-04-23 9:33 ` [RFC v2 1/4] memcg: integrate soft reclaim tighter with zone shrinking code Michal Hocko
2013-04-23 9:33 ` [RFC v2 2/4] memcg: Get rid of soft-limit tree infrastructure Michal Hocko
2013-04-23 9:33 ` [RFC v2 3/4] vmscan, memcg: Do softlimit reclaim also for targeted reclaim Michal Hocko
2013-04-23 9:33 ` [RFC v2 4/4] memcg: Ignore soft limit until it is explicitly specified Michal Hocko
2013-04-24 21:45 ` memcg: softlimit on internal nodes Johannes Weiner
2013-04-25 0:33 ` Tejun Heo
2013-04-29 18:39 ` Johannes Weiner
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