linux-kernel - Re: [why oom_adj does not work] Re: Linux killed Kenny, bastard!

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Message-ID: <alpine.DEB.2.00.0901131336040.17683@chino.kir.corp.google.com>
Date:	Tue, 13 Jan 2009 13:39:01 -0800 (PST)
From:	David Rientjes <rientjes@...gle.com>
To:	Evgeniy Polyakov <zbr@...emap.net>
cc:	Balbir Singh <balbir@...ux.vnet.ibm.com>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Dave Jones <davej@...hat.com>, linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [why oom_adj does not work] Re: Linux killed Kenny, bastard!

On Wed, 14 Jan 2009, Evgeniy Polyakov wrote:

> I really did not investigate why it happend, but oom'ed machine had
> killed cgi daemons and parent process itself. And ssh to the heap.
> While it should be enough just to kill appropriate daemon. Apparently
> things are not that shine as should be.
> 

As previously mentioned, you have all the diagnostic tools at your 
disposal already:

	echo 1 > /proc/sys/vm/oom_dump_tasks

The badness scoring is straight-forward given that information, so you can 
diagnose why a specific task was not killed and another was chosen.  You 
can also use that information to appropriately tune the oom_adj scores to 
identify your oom killer target preferences.
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