linux-kernel - Re: [RFC] respect the referenced bit of KVM guest pages?

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Message-ID: <4A7ADF78.20105@redhat.com>
Date:	Thu, 06 Aug 2009 16:49:44 +0300
From:	Avi Kivity <avi@...hat.com>
To:	Rik van Riel <riel@...hat.com>
CC:	Wu Fengguang <fengguang.wu@...el.com>,
	Andrea Arcangeli <aarcange@...hat.com>,
	"Dike, Jeffrey G" <jeffrey.g.dike@...el.com>,
	"Yu, Wilfred" <wilfred.yu@...el.com>,
	"Kleen, Andi" <andi.kleen@...el.com>,
	Hugh Dickins <hugh.dickins@...cali.co.uk>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Christoph Lameter <cl@...ux-foundation.org>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Mel Gorman <mel@....ul.ie>,
	LKML <linux-kernel@...r.kernel.org>,
	linux-mm <linux-mm@...ck.org>
Subject: Re: [RFC] respect the referenced bit of KVM guest pages?

On 08/06/2009 04:13 PM, Rik van Riel wrote:
> Avi Kivity wrote:
>> On 08/06/2009 01:59 PM, Wu Fengguang wrote:
>
>>> As a refinement, the static variable 'recent_all_referenced' could be
>>> moved to struct zone or made a per-cpu variable.
>>
>> Definitely this should be made part of the zone structure, consider 
>> the original report where the problem occurs in a 128MB zone (where 
>> we can expect many pages to have their referenced bit set).
>
> The problem did not occur in a 128MB zone, but in a 128MB cgroup.
>
> Putting it in the zone means that the cgroup, which may have
> different behaviour from the rest of the zone, due to excessive
> memory pressure inside the cgroup, does not get the right
> statistics.
>

Well, it should be per inactive list, whether it's a zone or a cgroup.  
What's the name of this thing? ("inactive list"?)

error compiling committee.c: too many arguments to function

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