From: Rik van Riel <riel@redhat.com>
To: David Rientjes <rientjes@google.com>
Cc: Lubos Lunak <l.lunak@suse.cz>,
Balbir Singh <balbir@linux.vnet.ibm.com>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
Andrew Morton <akpm@linux-foundation.org>,
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
Nick Piggin <npiggin@suse.de>, Jiri Kosina <jkosina@suse.cz>
Subject: Re: Improving OOM killer
Date: Wed, 03 Feb 2010 19:18:09 -0500 [thread overview]
Message-ID: <4B6A1241.60009@redhat.com> (raw)
In-Reply-To: <alpine.DEB.2.00.1002031600490.27918@chino.kir.corp.google.com>
On 02/03/2010 07:05 PM, David Rientjes wrote:
> On Wed, 3 Feb 2010, Lubos Lunak wrote:
>>> /* Forkbombs get penalized 10% of available RAM */
>>> if (forkcount> 500)
>>> points += 100;
> Do you have any comments about the forkbomb detector or its threshold that
> I've put in my heuristic? I think detecting these scenarios is still an
> important issue that we need to address instead of simply removing it from
> consideration entirely.
I believe that malicious users are best addressed in person,
or preemptively through cgroups and rlimits.
Having a process with over 500 children is quite possible
with things like apache, Oracle, postgres and other forking
daemons.
Killing the parent process can result in the service
becoming unavailable, and in some cases even data
corruption.
--
All rights reversed.
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
next prev parent reply other threads:[~2010-02-04 0:18 UTC|newest]
Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-02-01 22:02 Improving OOM killer Lubos Lunak
2010-02-01 23:53 ` David Rientjes
2010-02-02 21:10 ` Lubos Lunak
2010-02-03 1:41 ` David Rientjes
2010-02-03 1:52 ` KAMEZAWA Hiroyuki
2010-02-03 2:12 ` David Rientjes
2010-02-03 2:12 ` KAMEZAWA Hiroyuki
2010-02-03 2:36 ` [patch] sysctl: clean up vm related variable declarations David Rientjes
2010-02-03 8:07 ` KOSAKI Motohiro
2010-02-03 8:17 ` Balbir Singh
2010-02-03 22:54 ` Improving OOM killer Lubos Lunak
2010-02-04 0:00 ` David Rientjes
2010-02-03 7:50 ` KOSAKI Motohiro
2010-02-03 9:40 ` David Rientjes
2010-02-03 8:57 ` Balbir Singh
2010-02-03 12:10 ` Lubos Lunak
2010-02-03 12:25 ` Balbir Singh
2010-02-03 15:00 ` Minchan Kim
2010-02-03 16:06 ` Minchan Kim
2010-02-03 21:22 ` Lubos Lunak
2010-02-03 14:49 ` Rik van Riel
2010-02-03 17:01 ` Balbir Singh
2010-02-03 18:58 ` David Rientjes
2010-02-03 19:29 ` Frans Pop
2010-02-03 19:52 ` David Rientjes
2010-02-03 20:12 ` Frans Pop
2010-02-03 20:26 ` David Rientjes
2010-02-03 22:55 ` Lubos Lunak
2010-02-04 0:05 ` David Rientjes
2010-02-04 0:18 ` Rik van Riel [this message]
2010-02-04 21:48 ` David Rientjes
2010-02-04 22:06 ` Rik van Riel
2010-02-04 22:14 ` David Rientjes
2010-02-10 20:54 ` Lubos Lunak
2010-02-10 21:10 ` Rik van Riel
2010-02-10 21:29 ` Lubos Lunak
2010-02-10 22:18 ` Alan Cox
2010-02-10 22:31 ` David Rientjes
2010-02-11 9:50 ` Lubos Lunak
2010-02-04 22:31 ` Frans Pop
2010-02-04 22:53 ` David Rientjes
2010-02-04 7:58 ` Lubos Lunak
2010-02-04 21:34 ` David Rientjes
2010-02-10 20:54 ` Lubos Lunak
2010-02-10 21:09 ` Rik van Riel
2010-02-10 21:34 ` Lubos Lunak
2010-02-10 22:25 ` David Rientjes
2010-02-11 10:16 ` Lubos Lunak
2010-02-11 21:17 ` David Rientjes
2010-02-04 9:50 ` Jiri Kosina
2010-02-04 21:39 ` David Rientjes
2010-02-05 7:35 ` Oliver Neukum
2010-02-10 3:10 ` David Rientjes
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=4B6A1241.60009@redhat.com \
--to=riel@redhat.com \
--cc=akpm@linux-foundation.org \
--cc=balbir@linux.vnet.ibm.com \
--cc=jkosina@suse.cz \
--cc=kosaki.motohiro@jp.fujitsu.com \
--cc=l.lunak@suse.cz \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=npiggin@suse.de \
--cc=rientjes@google.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).