linux-kernel - Re: [PATCH 1/3] mm, oom: rework oom detection

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Date:	Mon, 4 Apr 2016 11:23:43 +0300
From:	Vladimir Davydov <vdavydov@...tuozzo.com>
To:	Michal Hocko <mhocko@...nel.org>
CC:	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Johannes Weiner <hannes@...xchg.org>,
	Mel Gorman <mgorman@...e.de>,
	David Rientjes <rientjes@...gle.com>,
	Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>,
	Hillf Danton <hillf.zj@...baba-inc.com>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	<linux-mm@...ck.org>, LKML <linux-kernel@...r.kernel.org>,
	Michal Hocko <mhocko@...e.com>
Subject: Re: [PATCH 1/3] mm, oom: rework oom detection

On Tue, Dec 15, 2015 at 07:19:44PM +0100, Michal Hocko wrote:
...
> @@ -2592,17 +2589,10 @@ static bool shrink_zones(struct zonelist *zonelist, struct scan_control *sc)
>  						&nr_soft_scanned);
>  			sc->nr_reclaimed += nr_soft_reclaimed;
>  			sc->nr_scanned += nr_soft_scanned;
> -			if (nr_soft_reclaimed)
> -				reclaimable = true;
>  			/* need some check for avoid more shrink_zone() */
>  		}
>  
> -		if (shrink_zone(zone, sc, zone_idx(zone) == classzone_idx))
> -			reclaimable = true;
> -
> -		if (global_reclaim(sc) &&
> -		    !reclaimable && zone_reclaimable(zone))
> -			reclaimable = true;
> +		shrink_zone(zone, sc, zone_idx(zone));

Shouldn't it be

		shrink_zone(zone, sc, zone_idx(zone) == classzone_idx);

?

>  	}
>  
>  	/*