linux-kernel - Re: [PATCH v3 12/21] mm: push lruvec into update_page_reclaim

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Date:	Tue, 28 Feb 2012 09:44:19 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	Konstantin Khlebnikov <khlebnikov@...nvz.org>
Cc:	Hugh Dickins <hughd@...gle.com>, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org, Johannes Weiner <hannes@...xchg.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Andi Kleen <andi@...stfloor.org>
Subject: Re: [PATCH v3 12/21] mm: push lruvec into
 update_page_reclaim_stat()

On Thu, 23 Feb 2012 17:52:38 +0400
Konstantin Khlebnikov <khlebnikov@...nvz.org> wrote:

> Push lruvec pointer into update_page_reclaim_stat()
> * drop page argument
> * drop active and file arguments, use lru instead
> 
> Signed-off-by: Konstantin Khlebnikov <khlebnikov@...nvz.org>

Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>


> ---
>  mm/swap.c |   30 +++++++++---------------------
>  1 files changed, 9 insertions(+), 21 deletions(-)
> 
> diff --git a/mm/swap.c b/mm/swap.c
> index 0cbc558..1f5731e 100644
> --- a/mm/swap.c
> +++ b/mm/swap.c
> @@ -276,24 +276,19 @@ void rotate_reclaimable_page(struct page *page)
>  	}
>  }
>  
> -static void update_page_reclaim_stat(struct zone *zone, struct page *page,
> -				     int file, int rotated)
> +static void update_page_reclaim_stat(struct lruvec *lruvec, enum lru_list lru)
>  {
> -	struct zone_reclaim_stat *reclaim_stat;
> -
> -	reclaim_stat = &page_lruvec(page)->reclaim_stat;
> +	struct zone_reclaim_stat *reclaim_stat = &lruvec->reclaim_stat;
> +	int file = is_file_lru(lru);
>  
>  	reclaim_stat->recent_scanned[file]++;
> -	if (rotated)
> +	if (is_active_lru(lru))
>  		reclaim_stat->recent_rotated[file]++;
>  }
>  
>  static void __activate_page(struct page *page, void *arg)
>  {
> -	struct zone *zone = page_zone(page);
> -
>  	if (PageLRU(page) && !PageActive(page) && !PageUnevictable(page)) {
> -		int file = page_is_file_cache(page);
>  		int lru = page_lru_base_type(page);
>  		struct lruvec *lruvec = page_lruvec(page);
>  
> @@ -304,7 +299,7 @@ static void __activate_page(struct page *page, void *arg)
>  		add_page_to_lru_list(lruvec, page, lru);
>  		__count_vm_event(PGACTIVATE);
>  
> -		update_page_reclaim_stat(zone, page, file, 1);
> +		update_page_reclaim_stat(lruvec, lru);
>  	}
>  }
>  
> @@ -443,7 +438,6 @@ static void lru_deactivate_fn(struct page *page, void *arg)
>  {
>  	int lru, file;
>  	bool active;
> -	struct zone *zone = page_zone(page);
>  	struct lruvec *lruvec;
>  
>  	if (!PageLRU(page))
> @@ -484,7 +478,7 @@ static void lru_deactivate_fn(struct page *page, void *arg)
>  
>  	if (active)
>  		__count_vm_event(PGDEACTIVATE);
> -	update_page_reclaim_stat(zone, page, file, 0);
> +	update_page_reclaim_stat(lruvec, lru);
>  }
>  
>  /*
> @@ -649,9 +643,7 @@ EXPORT_SYMBOL(__pagevec_release);
>  void lru_add_page_tail(struct zone* zone,
>  		       struct page *page, struct page *page_tail)
>  {
> -	int active;
>  	enum lru_list lru;
> -	const int file = 0;
>  	struct lruvec *lruvec = page_lruvec(page);
>  
>  	VM_BUG_ON(!PageHead(page));
> @@ -664,13 +656,11 @@ void lru_add_page_tail(struct zone* zone,
>  	if (page_evictable(page_tail, NULL)) {
>  		if (PageActive(page)) {
>  			SetPageActive(page_tail);
> -			active = 1;
>  			lru = LRU_ACTIVE_ANON;
>  		} else {
> -			active = 0;
>  			lru = LRU_INACTIVE_ANON;
>  		}
> -		update_page_reclaim_stat(zone, page_tail, file, active);
> +		update_page_reclaim_stat(lruvec, lru);
>  	} else {
>  		SetPageUnevictable(page_tail);
>  		lru = LRU_UNEVICTABLE;
> @@ -698,17 +688,15 @@ static void __pagevec_lru_add_fn(struct page *page, void *arg)
>  {
>  	enum lru_list lru = (enum lru_list)arg;
>  	struct lruvec *lruvec = page_lruvec(page);
> -	int file = is_file_lru(lru);
> -	int active = is_active_lru(lru);
>  
>  	VM_BUG_ON(PageActive(page));
>  	VM_BUG_ON(PageUnevictable(page));
>  	VM_BUG_ON(PageLRU(page));
>  
>  	SetPageLRU(page);
> -	if (active)
> +	if (is_active_lru(lru))
>  		SetPageActive(page);
> -	update_page_reclaim_stat(lruvec_zone(lruvec), page, file, active);
> +	update_page_reclaim_stat(lruvec, lru);
>  	add_page_to_lru_list(lruvec, page, lru);
>  }
>  
> 
> --
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