From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752817Ab1EaEc7 (ORCPT ); Tue, 31 May 2011 00:32:59 -0400 Received: from fgwmail6.fujitsu.co.jp ([192.51.44.36]:56888 "EHLO fgwmail6.fujitsu.co.jp" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751187Ab1EaEc6 (ORCPT ); Tue, 31 May 2011 00:32:58 -0400 X-SecurityPolicyCheck-FJ: OK by FujitsuOutboundMailChecker v1.3.1 Message-ID: <4DE46F69.4000205@jp.fujitsu.com> Date: Tue, 31 May 2011 13:32:41 +0900 From: KOSAKI Motohiro User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; ja; rv:1.9.2.17) Gecko/20110414 Lightning/1.0b2 Thunderbird/3.1.10 MIME-Version: 1.0 To: caiqian@redhat.com CC: linux-mm@kvack.org, linux-kernel@vger.kernel.org, akpm@linux-foundation.org, rientjes@google.com, hughd@google.com, kamezawa.hiroyu@jp.fujitsu.com, minchan.kim@gmail.com, oleg@redhat.com Subject: Re: [PATCH v2 0/5] Fix oom killer doesn't work at all if system have > gigabytes memory (aka CAI founded issue) References: <2135926037.315785.1306805582148.JavaMail.root@zmail06.collab.prod.int.phx2.redhat.com> <4DE46A4B.40401@jp.fujitsu.com> In-Reply-To: <4DE46A4B.40401@jp.fujitsu.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org (2011/05/31 13:10), KOSAKI Motohiro wrote: > (2011/05/31 10:33), CAI Qian wrote: >> Hello, >> >> Have tested those patches rebased from KOSAKI for the latest mainline. >> It still killed random processes and recevied a panic at the end by >> using root user. The full oom output can be found here. >> http://people.redhat.com/qcai/oom > > You ran fork-bomb as root. Therefore unprivileged process was killed at first. > It's no random. It's intentional and desirable. I mean > > - If you run the same progream as non-root, python will be killed at first. > Because it consume a lot of memory than daemons. > - If you run the same program as root, non root process and privilege explicit > dropping processes (e.g. irqbalance) will be killed at first. I mean, oom-killer start to kill python after killing all unprivilege process in this case. Please wait & see ahile after sequence. From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail144.messagelabs.com (mail144.messagelabs.com [216.82.254.51]) by kanga.kvack.org (Postfix) with ESMTP id B46796B0012 for ; Tue, 31 May 2011 00:33:01 -0400 (EDT) Received: from m2.gw.fujitsu.co.jp (unknown [10.0.50.72]) by fgwmail5.fujitsu.co.jp (Postfix) with ESMTP id EA34F3EE0C3 for ; Tue, 31 May 2011 13:32:53 +0900 (JST) Received: from smail (m2 [127.0.0.1]) by outgoing.m2.gw.fujitsu.co.jp (Postfix) with ESMTP id D143E45DF5E for ; Tue, 31 May 2011 13:32:53 +0900 (JST) Received: from s2.gw.fujitsu.co.jp (s2.gw.fujitsu.co.jp [10.0.50.92]) by m2.gw.fujitsu.co.jp (Postfix) with ESMTP id B60AA45DF5B for ; Tue, 31 May 2011 13:32:53 +0900 (JST) Received: from s2.gw.fujitsu.co.jp (localhost.localdomain [127.0.0.1]) by s2.gw.fujitsu.co.jp (Postfix) with ESMTP id A0D58E08008 for ; Tue, 31 May 2011 13:32:53 +0900 (JST) Received: from ml13.s.css.fujitsu.com (ml13.s.css.fujitsu.com [10.240.81.133]) by s2.gw.fujitsu.co.jp (Postfix) with ESMTP id 649CF1DB803C for ; Tue, 31 May 2011 13:32:53 +0900 (JST) Message-ID: <4DE46F69.4000205@jp.fujitsu.com> Date: Tue, 31 May 2011 13:32:41 +0900 From: KOSAKI Motohiro MIME-Version: 1.0 Subject: Re: [PATCH v2 0/5] Fix oom killer doesn't work at all if system have > gigabytes memory (aka CAI founded issue) References: <2135926037.315785.1306805582148.JavaMail.root@zmail06.collab.prod.int.phx2.redhat.com> <4DE46A4B.40401@jp.fujitsu.com> In-Reply-To: <4DE46A4B.40401@jp.fujitsu.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: caiqian@redhat.com Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, akpm@linux-foundation.org, rientjes@google.com, hughd@google.com, kamezawa.hiroyu@jp.fujitsu.com, minchan.kim@gmail.com, oleg@redhat.com (2011/05/31 13:10), KOSAKI Motohiro wrote: > (2011/05/31 10:33), CAI Qian wrote: >> Hello, >> >> Have tested those patches rebased from KOSAKI for the latest mainline. >> It still killed random processes and recevied a panic at the end by >> using root user. The full oom output can be found here. >> http://people.redhat.com/qcai/oom > > You ran fork-bomb as root. Therefore unprivileged process was killed at first. > It's no random. It's intentional and desirable. I mean > > - If you run the same progream as non-root, python will be killed at first. > Because it consume a lot of memory than daemons. > - If you run the same program as root, non root process and privilege explicit > dropping processes (e.g. irqbalance) will be killed at first. I mean, oom-killer start to kill python after killing all unprivilege process in this case. Please wait & see ahile after sequence. -- 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/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: email@kvack.org