linux-kernel - Re: [PATCH V2] nommu: add anonymous page memcg accounting

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Message-ID: <1287578957.2603.34.camel@iscandar.digidescorp.com>
Date:	Wed, 20 Oct 2010 07:49:17 -0500
From:	"Steven J. Magnani" <steve@...idescorp.com>
To:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Cc:	balbir@...ux.vnet.ibm.com, linux-mm@...ck.org, dhowells@...hat.com,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH V2] nommu: add anonymous page memcg accounting

On Wed, 2010-10-20 at 09:17 +0900, KAMEZAWA Hiroyuki wrote:
> On Tue, 19 Oct 2010 13:24:17 -0500
> "Steven J. Magnani" <steve@...idescorp.com> wrote:
> 
> > On Tue, 2010-10-19 at 21:18 +0530, Balbir Singh wrote:
> > > * Steven J. Magnani <steve@...idescorp.com> [2010-10-19 07:34:14]:
> > > > +
> > > > +At the present time, only anonymous pages are included in NOMMU memory cgroup
> > > > +accounting.
> > > 
> > > What is the reason for tracking just anonymous memory?
> > 
> > Tracking more than that is beyond my current scope, and perhaps of
> > limited benefit under an assumption that NOMMU systems don't usually
> > work with large files. The limitations of the implementation are
> > documented, so hopefully anyone who needs more functionality will know
> > that they need to implement it.
> > 
> 
> What happens at reaching limit ? memory can be reclaimed ?

I'm not quite sure what you're asking. In my usage, the OOM-killer gets
invoked and the 'runaway' dosfsck process gets terminated; at that point
all its memory is freed. 

Regards,
------------------------------------------------------------------------
 Steven J. Magnani               "I claim this network for MARS!
 www.digidescorp.com              Earthling, return my space modulator!"

 #include <standard.disclaimer>


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