linux-kernel - Re: OOM Killer don't works at all if the system have >gigabytes memory (was Re: [PATCH] mm: check zone->all_unreclaimable in all

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] [day] [month] [year] [list]

Message-ID: <alpine.DEB.2.00.1105161343120.4353@chino.kir.corp.google.com>
Date:	Mon, 16 May 2011 13:46:06 -0700 (PDT)
From:	David Rientjes <rientjes@...gle.com>
To:	CAI Qian <caiqian@...hat.com>
cc:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>, avagin@...il.com,
	Andrey Vagin <avagin@...nvz.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Mel Gorman <mel@....ul.ie>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, Minchan Kim <minchan.kim@...il.com>,
	Hugh Dickins <hughd@...gle.com>,
	Oleg Nesterov <oleg@...hat.com>
Subject: Re: OOM Killer don't works at all if the system have >gigabytes
 memory (was Re: [PATCH] mm: check zone->all_unreclaimable in
 all_unreclaimable())

On Fri, 13 May 2011, CAI Qian wrote:

> I have had a chance to test this patch after applied this patch manually
> (dd not apply cleanly) on the top of mainline kernel. The test is still
> running because it is trying to kill tons of python processes instread
> of the parent. Isn't there a way for oom to be smart enough to do
> "killall python"?

Not without userspace doing that explicitly, the oom killer attempts to 
only kill the most memory-hogging task to free memory.  If you're test is 
constantly forking new processes which allocate memory then the oom killer 
will just keep killing those children anytime it is out of memory.
--
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/