From: KOSAKI Motohiro <kosaki.motohiro@gmail.com>
To: Hugh Dickins <hughd@google.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Minchan Kim <minchan@kernel.org>,
linux-mm@kvack.org
Subject: Re: [PATCH 1/3] mm: test PageSwapBacked in lumpy reclaim
Date: Thu, 29 Dec 2011 00:06:51 -0500 [thread overview]
Message-ID: <4EFBF56B.9050800@gmail.com> (raw)
In-Reply-To: <alpine.LSU.2.00.1112282033260.1362@eggly.anvils>
(12/28/11 11:35 PM), Hugh Dickins wrote:
> Lumpy reclaim does well to stop at a PageAnon when there's no swap, but
> better is to stop at any PageSwapBacked, which includes shmem/tmpfs too.
>
> Signed-off-by: Hugh Dickins<hughd@google.com>
> ---
> mm/vmscan.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> --- mmotm.orig/mm/vmscan.c 2011-12-28 12:32:02.000000000 -0800
> +++ mmotm/mm/vmscan.c 2011-12-28 16:49:36.463201033 -0800
> @@ -1222,7 +1222,7 @@ static unsigned long isolate_lru_pages(u
> * anon page which don't already have a swap slot is
> * pointless.
> */
> - if (nr_swap_pages<= 0&& PageAnon(cursor_page)&&
> + if (nr_swap_pages<= 0&& PageSwapBacked(cursor_page)&&
> !PageSwapCache(cursor_page))
> break;
It seems obvious.
Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
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next prev parent reply other threads:[~2011-12-29 5:06 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-12-29 4:32 [PATCH 0/3] mm: three minor vmscan improvements Hugh Dickins
2011-12-29 4:35 ` [PATCH 1/3] mm: test PageSwapBacked in lumpy reclaim Hugh Dickins
2011-12-29 5:06 ` KOSAKI Motohiro [this message]
2012-01-04 1:23 ` Minchan Kim
2012-01-05 6:03 ` KAMEZAWA Hiroyuki
2011-12-29 4:36 ` [PATCH 2/3] mm: cond_resched in scan_mapping_unevictable_pages Hugh Dickins
2011-12-29 5:14 ` KOSAKI Motohiro
2011-12-29 5:48 ` Hugh Dickins
2011-12-29 22:46 ` Hugh Dickins
2011-12-29 4:39 ` [PATCH 3/3] mm: take pagevecs off reclaim stack Hugh Dickins
2011-12-29 5:42 ` KOSAKI Motohiro
2011-12-29 11:18 ` Konstantin Khlebnikov
2011-12-29 22:20 ` Hugh Dickins
2011-12-29 22:55 ` Andrew Morton
2011-12-29 23:27 ` Hugh Dickins
2011-12-30 0:24 ` KOSAKI Motohiro
2011-12-30 1:55 ` Hugh Dickins
2011-12-30 3:59 ` Andrew Morton
2011-12-30 15:51 ` Mel Gorman
2012-01-01 7:18 ` Hugh Dickins
2012-01-03 23:12 ` Andrew Morton
2012-01-03 23:17 ` KOSAKI Motohiro
2012-01-03 23:29 ` Andrew Morton
2012-01-04 0:03 ` KOSAKI Motohiro
2012-01-04 3:22 ` Hugh Dickins
2012-01-04 20:20 ` Andrew Morton
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