linux-kernel - Re: [PATCH] memcg: change behavior of moving charges at task move

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Date:	Fri, 23 Mar 2012 09:53:01 +0100
From:	Johannes Weiner <hannes@...xchg.org>
To:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	"cgroups@...r.kernel.org" <cgroups@...r.kernel.org>,
	Hugh Dickins <hughd@...gle.com>,
	"n-horiguchi@...jp.nec.com" <n-horiguchi@...jp.nec.com>,
	Michal Hocko <mhocko@...e.cz>,
	Glauber Costa <glommer@...allels.com>
Subject: Re: [PATCH] memcg: change behavior of moving charges at task move

On Fri, Mar 23, 2012 at 09:52:28AM +0900, KAMEZAWA Hiroyuki wrote:
> diff --git a/mm/memcontrol.c b/mm/memcontrol.c
> index b2ee6df..ca8b3a1 100644
> --- a/mm/memcontrol.c
> +++ b/mm/memcontrol.c
> @@ -5147,7 +5147,7 @@ static struct page *mc_handle_present_pte(struct vm_area_struct *vma,
>  		return NULL;
>  	if (PageAnon(page)) {
>  		/* we don't move shared anon */
> -		if (!move_anon() || page_mapcount(page) > 2)
> +		if (!move_anon())
>  			return NULL;
>  	} else if (!move_file())
>  		/* we ignore mapcount for file pages */
> @@ -5158,26 +5158,32 @@ static struct page *mc_handle_present_pte(struct vm_area_struct *vma,
>  	return page;
>  }
>  
> +#ifdef CONFFIG_SWAP

That will probably disable it for good :)
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