linux-kernel - Re: [PATCH 11/11] memcg: show reclaim

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Date:	Tue, 2 Dec 2008 18:05:25 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
Cc:	LKML <linux-kernel@...r.kernel.org>, linux-mm <linux-mm@...ck.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Balbir Singh <balbir@...ux.vnet.ibm.com>,
	Rik van Riel <riel@...hat.com>
Subject: Re: [PATCH 11/11] memcg: show reclaim_stat

On Mon,  1 Dec 2008 21:19:49 +0900 (JST)
KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com> wrote:

> added following four field to memory.stat file.
> 
>   - recent_rotated_anon
>   - recent_rotated_file
>   - recent_scanned_anon
>   - recent_scanned_file
> 
> it is useful for memcg reclaim debugging.
> 
I'll put this under CONFIG_DEBUG_VM.

Thanks,
-Kame

> 
> Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
> ---
>  mm/memcontrol.c |   25 +++++++++++++++++++++++++
>  1 file changed, 25 insertions(+)
> 
> Index: b/mm/memcontrol.c
> ===================================================================
> --- a/mm/memcontrol.c
> +++ b/mm/memcontrol.c
> @@ -1799,6 +1799,31 @@ static int mem_control_stat_show(struct 
>  
>  	cb->fill(cb, "inactive_ratio", mem_cont->inactive_ratio);
>  
> +	{
> +		int nid, zid;
> +		struct mem_cgroup_per_zone *mz;
> +		unsigned long recent_rotated[2] = {0, 0};
> +		unsigned long recent_scanned[2] = {0, 0};
> +
> +		for_each_online_node(nid)
> +			for (zid = 0; zid < MAX_NR_ZONES; zid++) {
> +				mz = mem_cgroup_zoneinfo(mem_cont, nid, zid);
> +
> +				recent_rotated[0] +=
> +					mz->reclaim_stat.recent_rotated[0];
> +				recent_rotated[1] +=
> +					mz->reclaim_stat.recent_rotated[1];
> +				recent_scanned[0] +=
> +					mz->reclaim_stat.recent_scanned[0];
> +				recent_scanned[1] +=
> +					mz->reclaim_stat.recent_scanned[1];
> +			}
> +		cb->fill(cb, "recent_rotated_anon", recent_rotated[0]);
> +		cb->fill(cb, "recent_rotated_file", recent_rotated[1]);
> +		cb->fill(cb, "recent_scanned_anon", recent_scanned[0]);
> +		cb->fill(cb, "recent_scanned_file", recent_scanned[1]);
> +	}
> +
>  	return 0;
>  }
>  
> 
> 
> --
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