linux-kernel - Re: [patch -mm v2] mm: introduce oom_adj

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Message-Id: <20090803170217.e98b2e46.kamezawa.hiroyu@jp.fujitsu.com>
Date:	Mon, 3 Aug 2009 17:02:17 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	David Rientjes <rientjes@...gle.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Rik van Riel <riel@...hat.com>,
	Paul Menage <menage@...gle.com>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [patch -mm v2] mm: introduce oom_adj_child

On Mon, 3 Aug 2009 00:59:18 -0700 (PDT)
David Rientjes <rientjes@...gle.com> wrote:

> > >  - /proc/pid/oom_score is inconsistent when the thread that set the
> > >    effective per-mm oom_adj exits and it is now obsolete since you have
> > >    no way to determine what the next effective oom_adj value shall be.
> > > 
> > plz re-caluculate it. it's not a big job if done in lazy way.
> > 
> 
> You can't recalculate it if all the remaining threads have a different 
> oom_adj value than the effective oom_adj value from the thread that is now 
> exited.  

Then, crazy google apps pass different oom_adjs to each thread ?
And, threads other than thread-group-leader modifies its oom_adj.

Hmm, interesting.


Thanks,
-Kame

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