linux-kernel - Re: [RFC][PATCH] memcg soft limit (yet another new design) v1

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Message-ID: <20090328182747.GA8339@balbir.in.ibm.com>
Date:	Sat, 28 Mar 2009 23:57:47 +0530
From:	Balbir Singh <balbir@...ux.vnet.ibm.com>
To:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	"kosaki.motohiro@...fujitsu.com" <kosaki.motohiro@...fujitsu.com>,
	"nishimura@....nes.nec.co.jp" <nishimura@....nes.nec.co.jp>
Subject: Re: [RFC][PATCH] memcg soft limit (yet another new design) v1

* Balbir Singh <balbir@...ux.vnet.ibm.com> [2009-03-28 23:41:00]:

> * KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com> [2009-03-27 13:59:33]:
> 
> > ==brief test result==
> > On 2CPU/1.6GB bytes machine. create group A and B
> >   A.  soft limit=300M
> >   B.  no soft limit
> > 
> >   Run a malloc() program on B and allcoate 1G of memory. The program just
> >   sleeps after allocating memory and no memory refernce after it.
> >   Run make -j 6 and compile the kernel.
> > 
> >   When vm.swappiness = 60  => 60MB of memory are swapped out from B.
> >   When vm.swappiness = 10  => 1MB of memory are swapped out from B    
> > 
> >   If no soft limit, 350MB of swap out will happen from B.(swapiness=60)
> >
> 
> I ran the same tests, booted the machine with mem=1700M and maxcpus=2
> 
> Here is what I see with

I meant to say, Here is what I see with my patches (v7)

> 
> A has a swapout of 344M and B has not swapout at all, since B is
> always under its soft limit. vm.swappiness is set to 60
> 
> I think the above is more along the lines of the expected functional behaviour. 
> 
> -- 
> 	Balbir

-- 
	Balbir
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