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From: "Paul Menage" <menage@google.com>
To: "Andrew Morton" <akpm@linux-foundation.org>
Cc: "Balbir Singh" <balbir@in.ibm.com>,
	linux-kernel@vger.kernel.org, vatsa@in.ibm.com,
	ckrm-tech@lists.sourceforge.net, xemul@sw.ru, linux-mm@kvack.org,
	svaidy@linux.vnet.ibm.com, devel@openvz.org
Subject: Re: [RFC][PATCH][0/4] Memory controller (RSS Control)
Date: Mon, 19 Feb 2007 01:06:10 -0800	[thread overview]
Message-ID: <6599ad830702190106m3f391de4x170326fef2e4872@mail.gmail.com> (raw)
In-Reply-To: <20070219005441.7fa0eccc.akpm@linux-foundation.org>

On 2/19/07, Andrew Morton <akpm@linux-foundation.org> wrote:
>
> Alas, I fear this might have quite bad worst-case behaviour.  One small
> container which is under constant memory pressure will churn the
> system-wide LRUs like mad, and will consume rather a lot of system time.
> So it's a point at which container A can deleteriously affect things which
> are running in other containers, which is exactly what we're supposed to
> not do.

I think it's OK for a container to consume lots of system time during
reclaim, as long as we can account that time to the container involved
(i.e. if it's done during direct reclaim rather than by something like
kswapd).

Churning the LRU could well be bad though, I agree.

Paul

  reply	other threads:[~2007-02-19  9:06 UTC|newest]

Thread overview: 39+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-02-19  6:50 Balbir Singh
2007-02-19  6:50 ` [RFC][PATCH][1/4] RSS controller setup Balbir Singh
2007-02-19  8:57   ` Andrew Morton
2007-02-19  9:18     ` Paul Menage
2007-02-19 11:13       ` Balbir Singh
2007-02-19 19:43         ` Matthew Helsley
2007-02-19 10:06     ` Balbir Singh
2007-02-19  6:50 ` [RFC][PATCH][2/4] Add RSS accounting and control Balbir Singh
2007-02-19  8:58   ` Andrew Morton
2007-02-19 10:37     ` [ckrm-tech] " Balbir Singh
2007-02-19 11:01       ` Andrew Morton
2007-02-19 11:09         ` Balbir Singh
2007-02-19 11:23           ` Andrew Morton
2007-02-19 11:56             ` Balbir Singh
2007-02-19 12:09               ` Paul Menage
2007-02-19 14:10                 ` Balbir Singh
2007-02-19 16:07                   ` Vaidyanathan Srinivasan
2007-02-19 16:17                     ` Balbir Singh
2007-02-20  6:40                       ` Vaidyanathan Srinivasan
2007-02-19  6:50 ` [RFC][PATCH][3/4] Add reclaim support Balbir Singh
2007-02-19  8:59   ` Andrew Morton
2007-02-19 10:50     ` Balbir Singh
2007-02-19 11:10       ` Andrew Morton
2007-02-19 11:16         ` Balbir Singh
2007-02-19  9:48   ` KAMEZAWA Hiroyuki
2007-02-19 10:52     ` Balbir Singh
2007-02-19  6:50 ` [RFC][PATCH][4/4] RSS controller documentation Balbir Singh
2007-02-19  8:54 ` [RFC][PATCH][0/4] Memory controller (RSS Control) Andrew Morton
2007-02-19  9:06   ` Paul Menage [this message]
2007-02-19  9:50     ` [ckrm-tech] " Kirill Korotaev
2007-02-19  9:50       ` Paul Menage
2007-02-19 10:24       ` Balbir Singh
2007-02-19 10:39     ` Balbir Singh
2007-02-19  9:16   ` Magnus Damm
2007-02-19 10:45     ` Balbir Singh
2007-02-19 11:56       ` Magnus Damm
2007-02-19 14:07         ` Balbir Singh
2007-02-19 10:00   ` Balbir Singh
2007-02-24 14:45 [RFC][PATCH][0/4] Memory controller (RSS Control) ( Balbir Singh

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