linux-kernel - Re: [PATCH V3] nommu: add anonymous page memcg accounting

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Message-Id: <20101022133413.3ab2df01.kamezawa.hiroyu@jp.fujitsu.com>
Date:	Fri, 22 Oct 2010 13:34:13 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	balbir@...ux.vnet.ibm.com
Cc:	"Steven J. Magnani" <steve@...idescorp.com>, linux-mm@...ck.org,
	dhowells@...hat.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH V3] nommu: add anonymous page memcg accounting

On Fri, 22 Oct 2010 09:23:03 +0530
Balbir Singh <balbir@...ux.vnet.ibm.com> wrote:

> * Steven J. Magnani <steve@...idescorp.com> [2010-10-21 07:28:08]:
> 
> > Add the necessary calls to track VM anonymous page usage (only).
> > 
> > V3 changes:
> > * Use vma->vm_mm instead of current->mm when charging pages, for clarity
> > * Document that reclaim is not possible with only anonymous page accounting
> >   so the OOM-killer is invoked when a limit is exceeded
> > * Add TODO to implement file cache (reclaim) support or optimize away
> >   page_cgroup->lru
> > 
> > V2 changes:
> > * Added update of memory cgroup documentation
> > * Clarify use of 'file' to distinguish anonymous mappings
> > 
> > Signed-off-by: Steven J. Magnani <steve@...idescorp.com>
> 
> Acked-by: Balbir Singh <balbir@...ux.vnet.ibm.com>
> 
> BTW, I have no way of testing this, we need to rely on the NOMMU
> community to test this.
>  
Yes, that's the biggest problem.

-Kame

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