linux-kernel - Re: oomkillers gone wild.

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Date:	Sat, 9 Jun 2012 19:15:45 -0700 (PDT)
From:	David Rientjes <rientjes@...gle.com>
To:	Thomas Gleixner <tglx@...utronix.de>
cc:	Dave Jones <davej@...hat.com>,
	Linux Kernel <linux-kernel@...r.kernel.org>, linux-mm@...ck.org
Subject: Re: oomkillers gone wild.

On Fri, 8 Jun 2012, Thomas Gleixner wrote:

> > If we're leaking task_struct's, meaning that put_task_struct() isn't 
> > actually freeing them when the refcount goes to 0, then it's certainly not 
> > because of the oom killer which only sends a SIGKILL to the selected 
> > process.
> 
> I rather suspect, that this is a asymetry between get_ and
> put_task_struct and refcount just doesn't go to zero.
> 

We found an actual task_struct leak within put_task_struct() because of 
the free task notifiers during the 3.4 -rc cycle, so if kmemleak doesn't 
show anything then would it be possible to bisect the problem Dave?
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