linux-kernel - Re: [PATCH 4/5] oom: the points calculation of child processes must use find_lock_task

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Message-Id: <20100601084807.242D.A69D9226@jp.fujitsu.com>
Date:	Tue,  1 Jun 2010 08:48:58 +0900 (JST)
From:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
To:	Oleg Nesterov <oleg@...hat.com>
Cc:	kosaki.motohiro@...fujitsu.com,
	LKML <linux-kernel@...r.kernel.org>,
	linux-mm <linux-mm@...ck.org>,
	David Rientjes <rientjes@...gle.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Nick Piggin <npiggin@...e.de>
Subject: Re: [PATCH 4/5] oom: the points calculation of child processes must use find_lock_task_mm() too

> And, I think we need another patch on top of this one. Note that
> this list_for_each_entry(p->children) can only see the tasks forked
> by p, it can't see other children forked by its sub-threads.
> 
> IOW, we need
> 
> 	do {
> 		list_for_each_entry(c, &t->children, sibling) {
> 			...
> 		}
> 	} while_each_thread(p, t);
> 
> Probably the same for oom_kill_process().
> 
> What do you think?

Makes perfectly sense. I have to do it!

Thanks good reviewing!




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