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Re: [ckrm-tech] [RFC][PATCH][0/4] Memory controller (RSS Control) [message #10424 is a reply to message #10423]

Mon, 19 February 2007 09:50

Paul Menage
Messages: 642
Registered: September 2006

Senior Member

On 2/19/07, Kirill Korotaev <dev@sw.ru> wrote:
> >
> > 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).
> hmm, is it ok to scan 100Gb of RAM for 10MB RAM container?
> in UBC patch set we used page beancounters to track containter pages.
> This allows to make efficient scan contoler and reclamation.

I don't mean that we shouldn't go for the most efficient method that's
practical. If we can do reclaim without spinning across so much of the
LRU, then that's obviously better.

But if the best approach in the general case results in a process in
the container spending lots of CPU time trying to do the reclaim,
that's probably OK as long as we can account for that time and (once
we have a CPU controller) throttle back the container in that case. So
then, a container can only hurt itself by thrashing/reclaiming, rather
than hurting other containers. (LRU churn notwithstanding ...)

Paul

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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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