linux-kernel - Re: 2.6.20-rc5: cp 18gb 18gb.2 = OOM killer, reproducible just like 2.16.19.2

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Date:	Thu, 25 Jan 2007 04:08:36 -0500 (EST)
From:	Justin Piszcz <jpiszcz@...idpixels.com>
To:	Pavel Machek <pavel@....cz>
cc:	linux-kernel@...r.kernel.org, linux-raid@...r.kernel.org,
	xfs@....sgi.com
Subject: Re: 2.6.20-rc5: cp 18gb 18gb.2 = OOM killer, reproducible just like
 2.16.19.2



On Thu, 25 Jan 2007, Pavel Machek wrote:

> Hi!
> 
> > > Is it highmem-related? Can you try it with mem=256M?
> > 
> > Bad idea, the kernel crashes & burns when I use mem=256, I had to boot 
> > 2.6.20-rc5-6 single to get back into my machine, very nasty.  Remember I 
> > use an onboard graphics controller that has 128MB of RAM allocated to it 
> > and I believe the ICH8 chipset also uses some memory, in any event mem=256 
> > causes the machine to lockup before it can even get to the boot/init 
> > processes, the two leds on the keyboard were blinking, caps lock and 
> > scroll lock and I saw no console at all!
> 
> Okay, so try mem=700M or disable CONFIG_HIGHMEM or something.
> 									Pavel
> -- 
> (english) http://www.livejournal.com/~pavelmachek
> (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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> 

I forgot to remove the mem=700M with PREEMPT off and this is what I saw 
this morning:

[18005.261875] Killed process 4768 (screen)
[18005.262343] Out of memory: kill process 4793 (screen) score 385 or a 
child
[18005.262350] Killed process 4793 (screen)
[18005.378536] Out of memory: kill process 4825 (screen) score 385 or a 
child
[18005.378542] Killed process 4825 (screen)
[18005.378547] Out of memory: kill process 4825 (screen) score 385 or a 
child
[18005.378553] Killed process 4825 (screen)
[18005.413072] Out of memory: kill process 4875 (screen) score 385 or a 
child
[18005.413079] Killed process 4875 (screen)
[18005.423735] Out of memory: kill process 4970 (screen) score 385 or a 
child
[18005.423742] Killed process 4970 (screen)
[18005.431391] Out of memory: kill process 21365 (xfs_fsr) score 286 or a 
child
[18005.431398] Killed process 21365 (xfs_fsr)
 
$ screen -ls
  There are screens on:
        2532.pts-0.p34  (Dead ???)
        3776.pts-2.p34  (Dead ???)
        4768.pts-7.p34  (Dead ???)
        4793.pts-9.p34  (Dead ???)
        4825.pts-11.p34 (Dead ???)
        4875.pts-13.p34 (Dead ???)
        4970.pts-15.p34 (Dead ???)
 

Lovely...

$ uname -r
2.6.20-rc5

Something is seriously wrong with that OOM killer.

Justin.

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