linux-kernel - Re: [PATCH v4] oom: add tracepoints for oom_score

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Date:	Tue, 4 Feb 2014 09:39:19 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Cc:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	akpm@...ux-foundation.org, rientjes@...gle.com, dchinner@...hat.com
Subject: Re: [PATCH v4] oom: add tracepoints for oom_score_adj

On Thu, Dec 08, 2011 at 03:32:30PM +0900, KAMEZAWA Hiroyuki wrote:
> From 5dc1f8c879ae424d5853af255df8860494209e39 Mon Sep 17 00:00:00 2001
> From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
> Date: Wed, 7 Dec 2011 09:58:16 +0900
> Subject: [PATCH] oom: trace point for oom_score_adj
> 
> oom_score_adj is set to prevent a task from being killed by OOM-Killer.
> Some daemons sets this value and their children inerit it sometimes.
> Because inheritance of oom_score_adj is done automatically, users
> can be confused at seeing the value and finds it's hard to debug.
> 
> This patch adds trace point for oom_score_adj. This adds 3 trace
> points. at
> 	- update oom_score_adj
> 	- fork()
> 	- rename task->comm(typically, exec())
> 

And nobody was bothered by the fact that we already had fork and exec tracepoints?

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