linux-kernel - Re: [PATCHv2 1/5] vmscan: separate sc.swap_cluster_max and sc.nr_max

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Message-Id: <20091103083416.a09dac3b.minchan.kim@barrios-desktop>
Date:	Tue, 3 Nov 2009 08:34:16 +0900
From:	Minchan Kim <minchan.kim@...il.com>
To:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
Cc:	Minchan Kim <minchan.kim@...il.com>,
	"Rafael J. Wysocki" <rjw@...k.pl>, Rik van Riel <riel@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>,
	linux-mm <linux-mm@...ck.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCHv2 1/5] vmscan: separate sc.swap_cluster_max and
 sc.nr_max_reclaim

On Tue, 3 Nov 2009 00:35:30 +0900 (JST)
KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com> wrote:

> Hi
> 
> > > @@ -1932,6 +1938,7 @@ static unsigned long balance_pgdat(pg_data_t *pgdat, int order)
> > >  		.may_unmap = 1,
> > >  		.may_swap = 1,
> > >  
> > 		.swap_cluster_max = SWAP_CLUSTER_MAX,
> > Or add comment in here. 
> > 
> > 'kswapd doesn't want to be bailed out while reclaim.'
> 
> OK, reasonable.
> How about this?
> 
>
> 
> ---
>  mm/vmscan.c |    4 ++++
>  1 files changed, 4 insertions(+), 0 deletions(-)
> 
> diff --git a/mm/vmscan.c b/mm/vmscan.c
> index 7fb3435..84e4da0 100644
> --- a/mm/vmscan.c
> +++ b/mm/vmscan.c
> @@ -1930,6 +1930,10 @@ static unsigned long balance_pgdat(pg_data_t *pgdat, int order)
>  		.gfp_mask = GFP_KERNEL,
>  		.may_unmap = 1,
>  		.may_swap = 1,
> +		/*
> +		 * kswapd doesn't want to be bailed out while reclaim. because
> +		 * we want to put equal scanning pressure on each zone.
> +		 */
>  		.nr_to_reclaim = ULONG_MAX,
>  		.swappiness = vm_swappiness,
>  		.order = order,
> -- 
> 1.6.2.5
> 


Reviewed-by: Minchan Kim <minchan.kim@...il.com>
It looks good than mine.
Thanks, Kosaki. :)



-- 
Kind regards,
Minchan Kim
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