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From: Tejun Heo <tj@kernel.org>
To: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@suse.cz>,
	Andrew Morton <akpm@linux-foundation.org>,
	linux-mm@kvack.org, cgroups@vger.kernel.org,
	linux-kernel@vger.kernel.org,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
	Ying Han <yinghan@google.com>, Hugh Dickins <hughd@google.com>,
	Glauber Costa <glommer@parallels.com>,
	Michel Lespinasse <walken@google.com>,
	Greg Thelen <gthelen@google.com>,
	Balbir Singh <bsingharora@gmail.com>
Subject: Re: [patch v3 -mm 1/3] memcg: integrate soft reclaim tighter with zone shrinking code
Date: Fri, 17 May 2013 09:57:12 -0700	[thread overview]
Message-ID: <20130517165712.GB12632@mtj.dyndns.org> (raw)
In-Reply-To: <20130517160247.GA10023@cmpxchg.org>

Hello, Johannes.

On Fri, May 17, 2013 at 12:02:47PM -0400, Johannes Weiner wrote:
> There are setups with thousands of groups that do not even use soft
> limits.  Having them pointlessly iterate over all of them for every
> couple of pages reclaimed is just not acceptable.

Hmmm... if the iteration is the problem, it shouldn't be difficult to
build list of children which should be iterated.  Would that make it
acceptable?

Thanks.

-- 
tejun

WARNING: multiple messages have this Message-ID (diff)
From: Tejun Heo <tj@kernel.org>
To: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@suse.cz>,
	Andrew Morton <akpm@linux-foundation.org>,
	linux-mm@kvack.org, cgroups@vger.kernel.org,
	linux-kernel@vger.kernel.org,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
	Ying Han <yinghan@google.com>, Hugh Dickins <hughd@google.com>,
	Glauber Costa <glommer@parallels.com>,
	Michel Lespinasse <walken@google.com>,
	Greg Thelen <gthelen@google.com>,
	Balbir Singh <bsingharora@gmail.com>
Subject: Re: [patch v3 -mm 1/3] memcg: integrate soft reclaim tighter with zone shrinking code
Date: Fri, 17 May 2013 09:57:12 -0700	[thread overview]
Message-ID: <20130517165712.GB12632@mtj.dyndns.org> (raw)
In-Reply-To: <20130517160247.GA10023@cmpxchg.org>

Hello, Johannes.

On Fri, May 17, 2013 at 12:02:47PM -0400, Johannes Weiner wrote:
> There are setups with thousands of groups that do not even use soft
> limits.  Having them pointlessly iterate over all of them for every
> couple of pages reclaimed is just not acceptable.

Hmmm... if the iteration is the problem, it shouldn't be difficult to
build list of children which should be iterated.  Would that make it
acceptable?

Thanks.

-- 
tejun

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  reply	other threads:[~2013-05-17 16:57 UTC|newest]

Thread overview: 74+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-05-13  7:46 [patch v3 0/3 -mm] Soft limit rework Michal Hocko
2013-05-13  7:46 ` Michal Hocko
2013-05-13  7:46 ` Michal Hocko
2013-05-13  7:46 ` [patch v3 -mm 1/3] memcg: integrate soft reclaim tighter with zone shrinking code Michal Hocko
2013-05-13  7:46   ` Michal Hocko
2013-05-15  8:34   ` Glauber Costa
2013-05-15  8:34     ` Glauber Costa
2013-05-16 22:12   ` Tejun Heo
2013-05-16 22:12     ` Tejun Heo
2013-05-16 22:12     ` Tejun Heo
2013-05-16 22:15     ` Tejun Heo
2013-05-16 22:15       ` Tejun Heo
2013-05-17  7:16       ` Michal Hocko
2013-05-17  7:16         ` Michal Hocko
2013-05-17  7:16         ` Michal Hocko
2013-05-17  7:12     ` Michal Hocko
2013-05-17  7:12       ` Michal Hocko
2013-05-17 16:02   ` Johannes Weiner
2013-05-17 16:02     ` Johannes Weiner
2013-05-17 16:57     ` Tejun Heo [this message]
2013-05-17 16:57       ` Tejun Heo
2013-05-17 17:27       ` Johannes Weiner
2013-05-17 17:27         ` Johannes Weiner
2013-05-17 17:45         ` Tejun Heo
2013-05-17 17:45           ` Tejun Heo
2013-05-17 17:45           ` Tejun Heo
2013-05-20 14:44     ` Michal Hocko
2013-05-20 14:44       ` Michal Hocko
2013-05-20 14:44       ` Michal Hocko
2013-05-21  6:53       ` Michal Hocko
2013-05-21  6:53         ` Michal Hocko
2013-05-27 17:13     ` Michal Hocko
2013-05-27 17:13       ` Michal Hocko
2013-05-27 17:13       ` Michal Hocko
2013-05-27 17:13       ` [PATCH 1/3] memcg: track children in soft limit excess to improve soft limit Michal Hocko
2013-05-27 17:13         ` Michal Hocko
2013-05-27 17:13       ` [PATCH 2/3] memcg, vmscan: Do not attempt soft limit reclaim if it would not scan anything Michal Hocko
2013-05-27 17:13         ` Michal Hocko
2013-05-27 17:13       ` [PATCH 3/3] memcg: Track all children over limit in the root Michal Hocko
2013-05-27 17:13         ` Michal Hocko
2013-05-27 17:20       ` [PATCH] memcg: enhance memcg iterator to support predicates Michal Hocko
2013-05-27 17:20         ` Michal Hocko
2013-05-27 17:20         ` Michal Hocko
2013-05-29 13:05       ` [patch v3 -mm 1/3] memcg: integrate soft reclaim tighter with zone shrinking code Michal Hocko
2013-05-29 13:05         ` Michal Hocko
2013-05-29 13:05         ` Michal Hocko
2013-05-29 15:57         ` Michal Hocko
2013-05-29 15:57           ` Michal Hocko
2013-05-29 20:01           ` Johannes Weiner
2013-05-29 20:01             ` Johannes Weiner
2013-05-30  8:45             ` Michal Hocko
2013-05-30  8:45               ` Michal Hocko
2013-05-29 14:54       ` Michal Hocko
2013-05-29 14:54         ` Michal Hocko
2013-05-30  8:36         ` Michal Hocko
2013-05-30  8:36           ` Michal Hocko
2013-05-13  7:46 ` [patch v3 -mm 2/3] memcg: Get rid of soft-limit tree infrastructure Michal Hocko
2013-05-13  7:46   ` Michal Hocko
2013-05-15  8:38   ` Glauber Costa
2013-05-15  8:38     ` Glauber Costa
2013-05-16 22:16   ` Tejun Heo
2013-05-16 22:16     ` Tejun Heo
2013-05-13  7:46 ` [patch v3 -mm 3/3] vmscan, memcg: Do softlimit reclaim also for targeted reclaim Michal Hocko
2013-05-13  7:46   ` Michal Hocko
2013-05-13  7:46   ` Michal Hocko
2013-05-15  8:42   ` Glauber Costa
2013-05-15  8:42     ` Glauber Costa
2013-05-17  7:50     ` Michal Hocko
2013-05-17  7:50       ` Michal Hocko
2013-05-17  7:50       ` Michal Hocko
2013-05-16 23:12   ` Tejun Heo
2013-05-16 23:12     ` Tejun Heo
2013-05-17  7:34     ` Michal Hocko
2013-05-17  7:34       ` Michal Hocko

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