linux-kernel - Re: How to immunize a process from the OOM Killer

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]

Message-ID: <alpine.DEB.2.00.0910291206480.27732@chino.kir.corp.google.com>
Date:	Thu, 29 Oct 2009 12:10:48 -0700 (PDT)
From:	David Rientjes <rientjes@...gle.com>
To:	Juan Miscaro <jmiscaro@...il.com>
cc:	linux-kernel@...r.kernel.org
Subject: Re: How to immunize a process from the OOM Killer

On Thu, 29 Oct 2009, Juan Miscaro wrote:

> Hi, I'm running 2.6.24 on Ubuntu.
> 
> I've got a OOM Killer gone wild.  I have plenty of free memory (over
> 40 GB) and lots of processes are being murdered.  Anyway, I would like
> to first prevent a few processes from being killed in the hopes of
> buying me time (users can work) to discover why the killer is being
> invoked in the first place.
> 
> I've read in a few places [1] that in order to immunize a process you
> need to modify the value of /proc/PID/oom_adj.  Thing is, such files
> cannot be edited directly.  How do I achieve my goal?
> 

You need to do it as the superuser:

	$ sudo su
	# echo -17 > /proc/pid/oom_adj

or

	sudo sh -c "echo -17 > /proc/pid/oom_adj"
--
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/