linux-kernel - Re: [PATCH 1/5] oom: improve dump

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Date:	Mon, 23 May 2011 15:16:16 -0700 (PDT)
From:	David Rientjes <rientjes@...gle.com>
To:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
cc:	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>, caiqian@...hat.com,
	Hugh Dickins <hughd@...gle.com>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Minchan Kim <minchan.kim@...il.com>,
	Oleg Nesterov <oleg@...hat.com>
Subject: Re: [PATCH 1/5] oom: improve dump_tasks() show items

On Fri, 20 May 2011, KOSAKI Motohiro wrote:

> diff --git a/mm/oom_kill.c b/mm/oom_kill.c
> index f52e85c..43d32ae 100644
> --- a/mm/oom_kill.c
> +++ b/mm/oom_kill.c
> @@ -355,7 +355,7 @@ static void dump_tasks(const struct mem_cgroup *mem, const nodemask_t *nodemask)
>  	struct task_struct *p;
>  	struct task_struct *task;
> 
> -	pr_info("[ pid ]   uid  tgid total_vm      rss cpu oom_adj oom_score_adj name\n");
> +	pr_info("[   pid]   ppid   uid total_vm      rss     swap score_adj name\n");
>  	for_each_process(p) {
>  		if (oom_unkillable_task(p, mem, nodemask))
>  			continue;
> @@ -370,11 +370,14 @@ static void dump_tasks(const struct mem_cgroup *mem, const nodemask_t *nodemask)
>  			continue;
>  		}
> 
> -		pr_info("[%5d] %5d %5d %8lu %8lu %3u     %3d         %5d %s\n",
> -			task->pid, task_uid(task), task->tgid,
> -			task->mm->total_vm, get_mm_rss(task->mm),
> -			task_cpu(task), task->signal->oom_adj,
> -			task->signal->oom_score_adj, task->comm);
> +		pr_info("[%6d] %6d %5d %8lu %8lu %8lu %9d %s\n",
> +			task_tgid_nr(task), task_tgid_nr(task->real_parent),
> +			task_uid(task),
> +			task->mm->total_vm,
> +			get_mm_rss(task->mm) + p->mm->nr_ptes,
> +			get_mm_counter(p->mm, MM_SWAPENTS),
> +			task->signal->oom_score_adj,
> +			task->comm);
>  		task_unlock(task);
>  	}
>  }

Looks good, with the exception that the "score_adj" header should remain 
"oom_score_adj" since that is its name within procfs that changes the 
tunable.

After that's fixed:

	Acked-by: David Rientjes <rientjes@...gle.com>
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