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Date: Wed, 15 Jan 2014 23:45:22 -0800 (PST)
From: David Rientjes <rientjes@google.com>
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To: Johannes Weiner <hannes@cmpxchg.org>
cc: Andrew Morton <akpm@linux-foundation.org>, Michal Hocko <mhocko@suse.cz>,
        KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
        cgroups@vger.kernel.org, linux-mm@kvack.org,
        linux-kernel@vger.kernel.org
Subject: Re: [patch -mm] mm, oom: prefer thread group leaders for display
 purposes
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On Thu, 16 Jan 2014, Johannes Weiner wrote:

> > diff --git a/mm/memcontrol.c b/mm/memcontrol.c
> > index a815686..b482f49 100644
> > --- a/mm/memcontrol.c
> > +++ b/mm/memcontrol.c
> > @@ -1841,13 +1841,17 @@ static void mem_cgroup_out_of_memory(struct mem_cgroup *memcg, gfp_t gfp_mask,
> >  				break;
> >  			};
> >  			points = oom_badness(task, memcg, NULL, totalpages);
> > -			if (points > chosen_points) {
> > -				if (chosen)
> > -					put_task_struct(chosen);
> > -				chosen = task;
> > -				chosen_points = points;
> > -				get_task_struct(chosen);
> 
> Where did that GET go?
> 

No idea, good catch!  This patch was doomed from the GET-go.