linux-kernel - Re: [PATCH 14/17] mm: Do not use atomic operations when releasing pages

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Message-ID: <20140501132922.GD23420@cmpxchg.org>
Date:	Thu, 1 May 2014 09:29:22 -0400
From:	Johannes Weiner <hannes@...xchg.org>
To:	Mel Gorman <mgorman@...e.de>
Cc:	Linux-MM <linux-mm@...ck.org>,
	Linux-FSDevel <linux-fsdevel@...r.kernel.org>,
	Vlastimil Babka <vbabka@...e.cz>, Jan Kara <jack@...e.cz>,
	Michal Hocko <mhocko@...e.cz>, Hugh Dickins <hughd@...gle.com>,
	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 14/17] mm: Do not use atomic operations when releasing
 pages

On Thu, May 01, 2014 at 09:44:45AM +0100, Mel Gorman wrote:
> There should be no references to it any more and a parallel mark should
> not be reordered against us. Use non-locked varient to clear page active.
> 
> Signed-off-by: Mel Gorman <mgorman@...e.de>
> ---
>  mm/swap.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/mm/swap.c b/mm/swap.c
> index f2228b7..7a5bdd7 100644
> --- a/mm/swap.c
> +++ b/mm/swap.c
> @@ -854,7 +854,7 @@ void release_pages(struct page **pages, int nr, bool cold)
>  		}
>  
>  		/* Clear Active bit in case of parallel mark_page_accessed */
> -		ClearPageActive(page);
> +		__ClearPageActive(page);

Shouldn't this comment be removed also?
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