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Re: [patch00/05]: Containers(V2)- Introduction [message #6615 is a reply to message #6523]

Wed, 20 September 2006 18:57

Rohit Seth
Messages: 101
Registered: August 2006

Senior Member

On Wed, 2006-09-20 at 20:37 +0200, Peter Zijlstra wrote:
> On Wed, 2006-09-20 at 10:50 -0700, Rohit Seth wrote:
> > On Thu, 2006-09-21 at 03:00 +1000, Nick Piggin wrote:
> > > (this time to the lists as well)
> > >
> > > Peter Zijlstra wrote:
> > >
> > > > I'd much rather containterize the whole reclaim code, which should not
> > > > be too hard since he already adds a container pointer to struct page.
> > >
> > >
> >
> > Right now the memory handler in this container subsystem is written in
> > such a way that when existing kernel reclaimer kicks in, it will first
> > operate on those (container with pages over the limit) pages first. But
> > in general I like the notion of containerizing the whole reclaim code.
>
> Patch 5/5 seems to have a horrid deactivation scheme.
>
> > > > I still have to reread what Rohit does for file backed pages, that gave
> > > > my head a spin.
> >
> > Please let me know if there is any specific part that isn't making much
> > sense.
>
> Well, the whole over the limit handler is quite painfull, having taken a
> second reading it isn't all that complex after all, just odd.
>

It is very basic right now.

> You just start invalidating whole files for file backed pages. Granted,
> this will get you below the threshold. but you might just have destroyed
> your working set.
>

When a container gone over the limit then it is okay to penalize it. I
agree that I'm not making an attempt to maintain the current working
set. Any suggestions that I can incorporate to improve this algorithm
will be very appreciated.

> Pretty much the same for you anonymous memory handler, you scan through
> the pages in linear fashion and demote the first that you encounter.
>
> Both things pretty thoroughly destroy the existing kernel reclaim.
>

I agree that with in a container I need to do add more smarts to (for
example) not do a linear search. Simple additions like last task or
last mapping visited could be useful. And I definitely want to improve
on that.

Though it should not destroy the existing kernel reclaim. Pages
belonging to over the limit container should be the first ones to either
get flushed out to FS or swapped if necessary. (Means that is the cost
that you will have to pay if you, for example, want to container your
tar to 100MB memory foot print).

-rohit

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[Message index]

		[patch00/05]: Containers(V2)- Introduction By: Rohit Seth on Wed, 20 September 2006 02:16
		Re: [patch00/05]: Containers(V2)- Introduction By: Nick Piggin on Wed, 20 September 2006 05:39
		Re: [patch00/05]: Containers(V2)- Introduction By: Rohit Seth on Wed, 20 September 2006 16:27
		Re: [patch00/05]: Containers(V2)- Introduction By: Christoph Lameter on Wed, 20 September 2006 16:26
		Re: [patch00/05]: Containers(V2)- Introduction By: Cedric Le Goater on Wed, 20 September 2006 13:06
		Re: [patch00/05]: Containers(V2)- Introduction By: Rohit Seth on Wed, 20 September 2006 16:45
		Re: [patch00/05]: Containers(V2)- Introduction By: Christoph Lameter on Wed, 20 September 2006 16:48
		Re: [patch00/05]: Containers(V2)- Introduction By: Nick Piggin on Wed, 20 September 2006 17:07
		Re: [patch00/05]: Containers(V2)- Introduction By: Nick Piggin on Wed, 20 September 2006 16:56
		Re: [patch00/05]: Containers(V2)- Introduction By: Christoph Lameter on Wed, 20 September 2006 17:08
		Re: [patch00/05]: Containers(V2)- Introduction By: Nick Piggin on Wed, 20 September 2006 17:19
		Re: [patch00/05]: Containers(V2)- Introduction By: Alan Cox on Wed, 20 September 2006 17:16
		Re: [patch00/05]: Containers(V2)- Introduction By: Nick Piggin on Wed, 20 September 2006 17:00
		Re: [patch00/05]: Containers(V2)- Introduction By: Alan Cox on Wed, 20 September 2006 17:12
		Re: [patch00/05]: Containers(V2)- Introduction By: Nick Piggin on Wed, 20 September 2006 17:30
		Re: [patch00/05]: Containers(V2)- Introduction By: Rohit Seth on Wed, 20 September 2006 17:50
		Re: [patch00/05]: Containers(V2)- Introduction By: Christoph Lameter on Wed, 20 September 2006 17:52
		Re: [patch00/05]: Containers(V2)- Introduction By: Peter Zijlstra on Wed, 20 September 2006 18:06
		Re: [patch00/05]: Containers(V2)- Introduction By: Peter Zijlstra on Wed, 20 September 2006 18:37
		Re: [ckrm-tech] [patch00/05]: Containers(V2)- Introduction By: Paul Menage on Wed, 20 September 2006 17:23
		Re: [patch00/05]: Containers(V2)- Introduction By: Christoph Lameter on Wed, 20 September 2006 16:25
		Re: [patch00/05]: Containers(V2)- Introduction By: Alan Cox on Wed, 20 September 2006 17:10
		Re: [patch00/05]: Containers(V2)- Introduction By: Christoph Lameter on Wed, 20 September 2006 17:15
		Re: [patch00/05]: Containers(V2)- Introduction By: Alan Cox on Wed, 20 September 2006 17:24
		Re: [patch00/05]: Containers(V2)- Introduction By: Christoph Lameter on Wed, 20 September 2006 17:35
		Re: [patch00/05]: Containers(V2)- Introduction By: Paul Jackson on Wed, 20 September 2006 23:29
		Re: [patch00/05]: Containers(V2)- Introduction By: Paul Jackson on Wed, 20 September 2006 23:18
		Re: [ckrm-tech] [patch00/05]: Containers(V2)- Introduction By: Paul Menage on Wed, 20 September 2006 17:30
		Re: [patch00/05]: Containers(V2)- Introduction By: Rohit Seth on Wed, 20 September 2006 17:26
		Re: [patch00/05]: Containers(V2)- Introduction By: Christoph Lameter on Wed, 20 September 2006 17:38
		Re: [patch00/05]: Containers(V2)- Introduction By: Rohit Seth on Wed, 20 September 2006 18:07
		Re: [patch00/05]: Containers(V2)- Introduction By: Christoph Lameter on Wed, 20 September 2006 19:51
		Re: [patch00/05]: Containers(V2)- Introduction By: Paul Jackson on Wed, 20 September 2006 20:06
		Re: [patch00/05]: Containers(V2)- Introduction By: Paul Jackson on Wed, 20 September 2006 22:58
		Re: [patch00/05]: Containers(V2)- Introduction By: Christoph Lameter on Wed, 20 September 2006 23:02
		Re: [patch00/05]: Containers(V2)- Introduction By: Rohit Seth on Wed, 20 September 2006 23:33
		Re: [patch00/05]: Containers(V2)- Introduction By: Christoph Lameter on Wed, 20 September 2006 23:36
		Re: [patch00/05]: Containers(V2)- Introduction By: Rohit Seth on Wed, 20 September 2006 23:39
		Re: [patch00/05]: Containers(V2)- Introduction By: Christoph Lameter on Wed, 20 September 2006 23:51
		Re: [patch00/05]: Containers(V2)- Introduction By: Paul Jackson on Thu, 21 September 2006 00:05
		Re: [ckrm-tech] [patch00/05]: Containers(V2)- Introduction By: Paul Menage on Thu, 21 September 2006 00:09
		Re: [patch00/05]: Containers(V2)- Introduction By: Rohit Seth on Wed, 20 September 2006 23:26
		Re: [patch00/05]: Containers(V2)- Introduction By: Christoph Lameter on Wed, 20 September 2006 23:31
		Re: [Lhms-devel] [patch00/05]: Containers(V2)- Introduction By: KAMEZAWA Hiroyuki on Thu, 21 September 2006 00:47
		Re: [Lhms-devel] [patch00/05]: Containers(V2)- Introduction By: KAMEZAWA Hiroyuki on Thu, 21 September 2006 01:29
		Re: [ckrm-tech] [Lhms-devel] [patch00/05]: Containers(V2)- Introduction By: Paul Menage on Thu, 21 September 2006 01:36
		Re: [ckrm-tech] [patch00/05]: Containers(V2)- Introduction By: Paul Menage on Wed, 20 September 2006 17:42
		Re: [patch00/05]: Containers(V2)- Introduction By: Paul Jackson on Wed, 20 September 2006 22:51
		Re: [patch00/05]: Containers(V2)- Introduction By: Christoph Lameter on Wed, 20 September 2006 23:01
		Re: [patch00/05]: Containers(V2)- Introduction By: Rohit Seth on Wed, 20 September 2006 23:22
		Re: [patch00/05]: Containers(V2)- Introduction By: Paul Jackson on Wed, 20 September 2006 23:45
		Re: [ckrm-tech] [patch00/05]: Containers(V2)- Introduction By: Paul Menage on Wed, 20 September 2006 17:37
		Re: [ckrm-tech] [patch00/05]: Containers(V2)- Introduction By: Chandra Seetharaman on Wed, 20 September 2006 18:34
		Re: [ckrm-tech] [patch00/05]: Containers(V2)- Introduction By: Christoph Lameter on Wed, 20 September 2006 19:52
		Re: [ckrm-tech] [patch00/05]: Containers(V2)- Introduction By: Chandra Seetharaman on Thu, 21 September 2006 00:31
		Re: [ckrm-tech] [patch00/05]: Containers(V2)- Introduction By: Paul Jackson on Thu, 21 September 2006 00:36
		Re: [ckrm-tech] [patch00/05]: Containers(V2)- Introduction By: Paul Menage on Thu, 21 September 2006 00:42
		Re: [ckrm-tech] [patch00/05]: Containers(V2)- Introduction By: Paul Menage on Wed, 20 September 2006 18:43
		Re: [ckrm-tech] [patch00/05]: Containers(V2)- Introduction By: Chandra Seetharaman on Wed, 20 September 2006 19:09
		Re: [patch00/05]: Containers(V2)- Introduction By: Nick Piggin on Wed, 20 September 2006 16:44
		Re: [patch00/05]: Containers(V2)- Introduction By: Christoph Lameter on Wed, 20 September 2006 17:12
		Re: [patch00/05]: Containers(V2)- Introduction By: Paul Jackson on Wed, 20 September 2006 22:27
		Re: [patch00/05]: Containers(V2)- Introduction By: Christoph Lameter on Wed, 20 September 2006 22:59
		Re: [patch00/05]: Containers(V2)- Introduction By: Christoph Lameter on Wed, 20 September 2006 17:30
		Re: [patch00/05]: Containers(V2)- Introduction By: Nick Piggin on Wed, 20 September 2006 18:03
		Re: [patch00/05]: Containers(V2)- Introduction By: Rohit Seth on Wed, 20 September 2006 18:14
		Re: [patch00/05]: Containers(V2)- Introduction By: Peter Zijlstra on Wed, 20 September 2006 18:27
		Re: [patch00/05]: Containers(V2)- Introduction By: Rohit Seth on Wed, 20 September 2006 18:38
		Re: [patch00/05]: Containers(V2)- Introduction By: Rohit Seth on Wed, 20 September 2006 18:57
		Re: [patch00/05]: Containers(V2)- Introduction By: Paul Jackson on Wed, 20 September 2006 19:48
		Re: [patch00/05]: Containers(V2)- Introduction By: Christoph Lameter on Wed, 20 September 2006 19:48
		Re: [ckrm-tech] [patch00/05]: Containers(V2)- Introduction By: Paul Menage on Wed, 20 September 2006 19:51
		Re: [ckrm-tech] [patch00/05]: Containers(V2)- Introduction By: Chandra Seetharaman on Wed, 27 September 2006 19:50
		Re: [ckrm-tech] [patch00/05]: Containers(V2)- Introduction By: Rohit Seth on Wed, 27 September 2006 21:28
		Re: [ckrm-tech] [patch00/05]: Containers(V2)- Introduction By: Chandra Seetharaman on Wed, 27 September 2006 22:24
		Re: [ckrm-tech] [patch00/05]: Containers(V2)- Introduction By: Balbir Singh on Thu, 28 September 2006 08:01
		Re: [ckrm-tech] [patch00/05]: Containers(V2)- Introduction By: Rohit Seth on Thu, 28 September 2006 18:31
		Re: [ckrm-tech] [patch00/05]: Containers(V2)- Introduction By: Balbir Singh on Thu, 28 September 2006 21:53
		Re: [ckrm-tech] [patch00/05]: Containers(V2)- Introduction By: Rohit Seth on Fri, 29 September 2006 00:22
		Re: [ckrm-tech] [patch00/05]: Containers(V2)- Introduction By: Rohit Seth on Thu, 28 September 2006 18:12
		Re: [ckrm-tech] [patch00/05]: Containers(V2)- Introduction By: Chandra Seetharaman on Thu, 28 September 2006 20:23
		Re: [ckrm-tech] [patch00/05]: Containers(V2)- Introduction By: Rohit Seth on Thu, 28 September 2006 21:38

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