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Re: [RFC][PATCH][0/4] Memory controller (RSS Control) [message #10472 is a reply to message #10436]

Mon, 19 February 2007 09:16

Magnus Damm
Messages: 8
Registered: August 2006

Junior Member

On 2/19/07, Andrew Morton <akpm@linux-foundation.org> wrote:
> On Mon, 19 Feb 2007 12:20:19 +0530 Balbir Singh <balbir@in.ibm.com> wrote:
>
> > This patch applies on top of Paul Menage's container patches (V7) posted at
> >
> > http://lkml.org/lkml/2007/2/12/88
> >
> > It implements a controller within the containers framework for limiting
> > memory usage (RSS usage).

> The key part of this patchset is the reclaim algorithm:
>
> 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.

Nice with a simple memory controller. The downside seems to be that it
doesn't scale very well when it comes to reclaim, but maybe that just
comes with being simple. Step by step, and maybe this is a good first
step?

Ideally I'd like to see unmapped pages handled on a per-container LRU
with a fallback to the system-wide LRUs. Shared/mapped pages could be
handled using PTE ageing/unmapping instead of page ageing, but that
may consume too much resources to be practical.

/ magnus

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[Message index]

		[RFC][PATCH][0/4] Memory controller (RSS Control) By: Balbir Singh on Mon, 19 February 2007 06:50
		[RFC][PATCH][1/4] RSS controller setup By: Balbir Singh on Mon, 19 February 2007 06:50
		Re: [RFC][PATCH][1/4] RSS controller setup By: Paul Menage on Mon, 19 February 2007 09:18
		Re: [RFC][PATCH][1/4] RSS controller setup By: Balbir Singh on Mon, 19 February 2007 11:13
		Re: [RFC][PATCH][1/4] RSS controller setup By: Matt Helsley on Mon, 19 February 2007 19:43
		Re: [RFC][PATCH][1/4] RSS controller setup By: Balbir Singh on Mon, 19 February 2007 10:06
		Re: [RFC][PATCH][1/4] RSS controller setup By: Andrew Morton on Mon, 19 February 2007 08:57
		[RFC][PATCH][2/4] Add RSS accounting and control By: Balbir Singh on Mon, 19 February 2007 06:50
		Re: [RFC][PATCH][2/4] Add RSS accounting and control By: Andrew Morton on Mon, 19 February 2007 08:58
		[RFC][PATCH][4/4] RSS controller documentation By: Balbir Singh on Mon, 19 February 2007 06:50
		[RFC][PATCH][3/4] Add reclaim support By: Balbir Singh on Mon, 19 February 2007 06:50
		Re: [RFC][PATCH][3/4] Add reclaim support By: KAMEZAWA Hiroyuki on Mon, 19 February 2007 09:48
		Re: [RFC][PATCH][3/4] Add reclaim support By: Balbir Singh on Mon, 19 February 2007 10:52
		Re: [RFC][PATCH][3/4] Add reclaim support By: Balbir Singh on Mon, 19 February 2007 10:50
		Re: [RFC][PATCH][3/4] Add reclaim support By: Andrew Morton on Mon, 19 February 2007 11:10
		Re: [RFC][PATCH][3/4] Add reclaim support By: Balbir Singh on Mon, 19 February 2007 11:16
		Re: [RFC][PATCH][3/4] Add reclaim support By: Andrew Morton on Mon, 19 February 2007 08:59
		Re: [RFC][PATCH][0/4] Memory controller (RSS Control) By: Paul Menage on Mon, 19 February 2007 09:06
		Re: [ckrm-tech] [RFC][PATCH][0/4] Memory controller (RSS Control) By: dev on Mon, 19 February 2007 09:46
		Re: [ckrm-tech] [RFC][PATCH][0/4] Memory controller (RSS Control) By: Paul Menage on Mon, 19 February 2007 09:50
		Re: [ckrm-tech] [RFC][PATCH][0/4] Memory controller (RSS Control) By: Balbir Singh on Mon, 19 February 2007 10:24
		Re: [RFC][PATCH][0/4] Memory controller (RSS Control) By: Balbir Singh on Mon, 19 February 2007 10:39
		Re: [RFC][PATCH][0/4] Memory controller (RSS Control) By: Balbir Singh on Mon, 19 February 2007 10:00
		Re: [RFC][PATCH][0/4] Memory controller (RSS Control) By: Balbir Singh on Mon, 19 February 2007 10:45
		Re: [RFC][PATCH][0/4] Memory controller (RSS Control) By: Magnus Damm on Mon, 19 February 2007 11:56
		Re: [RFC][PATCH][0/4] Memory controller (RSS Control) By: Andrew Morton on Mon, 19 February 2007 08:54
		Re: [RFC][PATCH][0/4] Memory controller (RSS Control) By: Magnus Damm on Mon, 19 February 2007 09:16
		Re: [RFC][PATCH][0/4] Memory controller (RSS Control) By: Balbir Singh on Mon, 19 February 2007 14:07

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