linux-kernel - Re: [PATCH v2 18/18] mm, vmscan: use proper classzone_idx in should_continue

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Date:	Wed, 1 Jun 2016 16:21:38 +0200
From:	Michal Hocko <mhocko@...nel.org>
To:	Vlastimil Babka <vbabka@...e.cz>
Cc:	Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org,
	Mel Gorman <mgorman@...hsingularity.net>,
	Joonsoo Kim <iamjoonsoo.kim@....com>,
	David Rientjes <rientjes@...gle.com>,
	Rik van Riel <riel@...hat.com>
Subject: Re: [PATCH v2 18/18] mm, vmscan: use proper classzone_idx in
 should_continue_reclaim()

On Tue 31-05-16 15:08:18, Vlastimil Babka wrote:
[...]
> @@ -2364,11 +2350,12 @@ static inline bool should_continue_reclaim(struct zone *zone,
>  }
>  
>  static bool shrink_zone(struct zone *zone, struct scan_control *sc,
> -			bool is_classzone)
> +			int classzone_idx)
>  {
>  	struct reclaim_state *reclaim_state = current->reclaim_state;
>  	unsigned long nr_reclaimed, nr_scanned;
>  	bool reclaimable = false;
> +	bool is_classzone = (classzone_idx == zone_idx(zone));
>  
>  	do {
>  		struct mem_cgroup *root = sc->target_mem_cgroup;
> @@ -2450,7 +2437,7 @@ static bool shrink_zone(struct zone *zone, struct scan_control *sc,
>  			reclaimable = true;
>  
>  	} while (should_continue_reclaim(zone, sc->nr_reclaimed - nr_reclaimed,
> -					 sc->nr_scanned - nr_scanned, sc));
> +			 sc->nr_scanned - nr_scanned, sc, classzone_idx));
>  
>  	return reclaimable;
>  }
> @@ -2580,7 +2567,7 @@ static void shrink_zones(struct zonelist *zonelist, struct scan_control *sc)
>  			/* need some check for avoid more shrink_zone() */
>  		}
>  
> -		shrink_zone(zone, sc, zone_idx(zone) == classzone_idx);
> +		shrink_zone(zone, sc, classzone_idx);

this should be is_classzone, right?

-- 
Michal Hocko
SUSE Labs