linux-kernel - Re: [RFC][PATCH 0/5] Memory controller soft limit patches (v9)

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Message-ID: <20090715052525.GG24034@balbir.in.ibm.com>
Date:	Wed, 15 Jul 2009 10:55:25 +0530
From:	Balbir Singh <balbir@...ux.vnet.ibm.com>
To:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org,
	lizf@...fujitsu.com, linux-kernel@...r.kernel.org,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
Subject: Re: [RFC][PATCH 0/5] Memory controller soft limit patches (v9)

* KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com> [2009-07-15 13:33:24]:

> On Wed, 15 Jul 2009 09:38:11 +0530
> Balbir Singh <balbir@...ux.vnet.ibm.com> wrote:
> 
> > * Balbir Singh <balbir@...ux.vnet.ibm.com> [2009-07-10 18:29:50]:
> > 
> > > 
> > > From: Balbir Singh <balbir@...ux.vnet.ibm.com>
> > > 
> > > New Feature: Soft limits for memory resource controller.
> > > 
> > > Here is v9 of the new soft limit implementation. Soft limits is a new feature
> > > for the memory resource controller, something similar has existed in the
> > > group scheduler in the form of shares. The CPU controllers interpretation
> > > of shares is very different though. 
> > >
> > 
> > If there are no objections to these patches, could we pick them up for
> > testing in mmotm. 
> > 
> 
> If any, will be fixed up in mmotm. About behavior, I don't have more things
> than I've said. (dealying kswapd is not very good.)
> 
> But plz discuss with Vladislav Buzov about implementation details of [2..3/5].
> ==
> [PATCH 1/2] Resource usage threshold notification addition to res_counter (v3)
> 
> It seems there are multiple functionalities you can shere with them.
> 
>  - hierarchical threshold check
>  - callback or notify agaisnt threshold.
>  etc..
> 
> I'm very happy if all messy things around res_counter+hierarchy are sorted out
> before diving into melting pot. I hope both of you have nice interfaces and
> keep res_counter neat.
>

I do see scope for reuse, but I've not yet gotten to reviewing v3 of
the patches. I will, I could potentially get him to base his patches
on top of this. One of the interesting things that Paul pointed out
was of global state.

-- 
	Balbir
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