linux-kernel - Re: [PATCH] oom: allow a non-CAP_SYS_RESOURCE proces to oom_score

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Message-Id: <E1PHQ64-0001M1-OD@be1.7eggert.dyndns.org>
Date:	Sun, 14 Nov 2010 01:05:28 +0100
From:	Bodo Eggert <7eggert@....de>
To:	Mandeep Singh Baines <msb@...gle.com>,
	David Rientjes <rientjes@...gle.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Rik van Riel <riel@...hat.com>,
	Ying Han <yinghan@...gle.com>, linux-kernel@...r.kernel.org,
	gspencer@...omium.org, piman@...omium.org, wad@...omium.org,
	olofj@...omium.org, Bodo Eggert <7eggert@....de>
Subject: Re: [PATCH] oom: allow a non-CAP_SYS_RESOURCE proces to oom_score_adj  down

Mandeep Singh Baines <msb@...gle.com> wrote:

> We'd like to be able to oom_score_adj a process up/down as its
> enters/leaves the foreground. Currently, it is not possible to oom_adj
> down without CAP_SYS_RESOURCE. This patch allows a task to decrease
> its oom_score_adj back to the value that a CAP_SYS_RESOURCE thread set
> it or its inherited value at fork. Assuming the thread that has forked
> it has oom_score_adj of 0, each tab

process

> could decrease it back from 0 upon 
> activation unless a CAP_SYS_RESOURCE thread elevated it to something
> higher.



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