linux-kernel - Re: Panic on OOM

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Message-ID: <1308103443.2074.357.camel@compaq-desktop>
Date:	Tue, 14 Jun 2011 22:04:03 -0400
From:	Chris Fowler <cfowler@...postsentinel.com>
To:	David Rientjes <rientjes@...gle.com>
Cc:	Chris Fowler <cfowler@...dc.com>, linux-kernel@...r.kernel.org
Subject: Re: Panic on OOM

On Tue, 2011-06-14 at 17:13 -0700, David Rientjes wrote:
> Using /proc/sys/vm/panic_on_oom also won't panic the machine if you
> happen to use a cpuset or mempolicy.  You'll want to write '2' instead
> if you want to panic in all possible oom conditions.
> 
> 

2 did it.  Thank you.

perl -e 'my @mem = (); while(1) { push @mem, "XXXXXXXXXXXXXXXX"; }'

I lost connection and it came back after about 30s.  Reboot worked.

In the past I've had OOM conditions "lock" a device so to keep from
having to call someone to reboot it I started using this method instead.
Out of memory conditions are rare and would only be caused by memory
leaks.  I've found all memory leaks that I could fine and the first OOM
condition was caused by the program doing exactly what I told it to
do. :)

On the device that is running 2.6.38 this is the first time I'm planning
on using some PERL code on the device.  I am a bit concerned about
possibly memory leaks taking down the device so I wanted to be sure this
works.  This box does not have any swap space and never real.  The 1G of
memory will be all that is available.

Thanks,
Chris

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