From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail203.messagelabs.com (mail203.messagelabs.com [216.82.254.243]) by kanga.kvack.org (Postfix) with SMTP id D657A6B0044 for ; Tue, 27 Oct 2009 02:35:06 -0400 (EDT) Received: by ywh26 with SMTP id 26so10541631ywh.12 for ; Mon, 26 Oct 2009 23:35:05 -0700 (PDT) Date: Tue, 27 Oct 2009 15:34:29 +0900 From: Minchan Kim Subject: Re: Memory overcommit Message-Id: <20091027153429.b36866c4.minchan.kim@barrios-desktop> In-Reply-To: <2f11576a0910262310g7aea23c0n9bfc84c900879d45@mail.gmail.com> References: <20091013120840.a844052d.kamezawa.hiroyu@jp.fujitsu.com> <20091014135119.e1baa07f.kamezawa.hiroyu@jp.fujitsu.com> <4ADE3121.6090407@gmail.com> <20091026105509.f08eb6a3.kamezawa.hiroyu@jp.fujitsu.com> <4AE5CB4E.4090504@gmail.com> <20091027122213.f3d582b2.kamezawa.hiroyu@jp.fujitsu.com> <2f11576a0910262310g7aea23c0n9bfc84c900879d45@mail.gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: owner-linux-mm@kvack.org To: KOSAKI Motohiro Cc: KAMEZAWA Hiroyuki , vedran.furac@gmail.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org List-ID: On Tue, 27 Oct 2009 15:10:52 +0900 KOSAKI Motohiro wrote: > 2009/10/27 KAMEZAWA Hiroyuki : > > On Mon, 26 Oct 2009 17:16:14 +0100 > > Vedran FuraA? wrote: > >> > A - Could you show me /var/log/dmesg and /var/log/messages at OOM ? > >> > >> It was catastrophe. :) X crashed (or killed) with all the programs, but > >> my little program was alive for 20 minutes (see timestamps). And for > >> that time computer was completely unusable. Couldn't even get the > >> console via ssh. Rally embarrassing for a modern OS to get destroyed by > >> a 5 lines of C run as an ordinary user. Luckily screen was still alive, > >> oomk usually kills it also. See for yourself: > >> > >> dmesg: http://pastebin.com/f3f83738a > >> messages: http://pastebin.com/f2091110a > >> > >> (CCing to lklm again... I just want people to see the logs.) > >> > > Thank you for reporting and your patience. It seems something strange > > that your KDE programs are killed. I agree. > > > > I attached a scirpt for checking oom_score of all exisiting process. > > (oom_score is a value used for selecting "bad" processs.") > > please run if you have time. > > > > This is a result of my own desktop(on virtual machine.) > > In this environ (Total memory is 1.6GBytes), mmap(1G) program is running. > > > > %check_badness.pl | sort -n | tail > > -- > > 89924 A 3938 A A mixer_applet2 > > 90210 A 3942 A A tomboy > > 94753 A 3936 A A clock-applet > > 101994 A 3919 A A pulseaudio > > 113525 A 4028 A A gnome-terminal > > 127340 A 1 A A A init > > 128177 A 3871 A A nautilus > > 151003 A 11515 A bash > > 256944 A 11653 A mmap > > 425561 A 3829 A A gnome-session > > -- > > Sigh, gnome-session has twice value of mmap(1G). > > Of course, gnome-session only uses 6M bytes of anon. > > I wonder this is because gnome-session has many children..but need to > > dig more. Does anyone has idea ? > > (CCed kosaki) > > Following output address the issue. > The fact is, modern desktop application linked pretty many library. it > makes bloat VSS size and increase > OOM score. > > Ideally, We shouldn't account evictable file-backed mappings for oom_score. > Hmm. I wonder why we consider VM size for OOM kiling. How about RSS size? -- Kind regards, Minchan Kim -- 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: email@kvack.org