linux-kernel - Re: Panic on OOM

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

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

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/