From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754112Ab3K2CIc (ORCPT ); Thu, 28 Nov 2013 21:08:32 -0500 Received: from mga09.intel.com ([134.134.136.24]:15933 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753845Ab3K2CI3 convert rfc822-to-8bit (ORCPT ); Thu, 28 Nov 2013 21:08:29 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.93,795,1378882800"; d="scan'208";a="416704210" From: "Tu, Xiaobing" To: "Ma, Xindong" , Oleg Nesterov , Michal Hocko CC: William Dauchy , Johannes Weiner , "akpm@linux-foundation.org" , "rientjes@google.com" , "rusty@rustcorp.com.au" , "linux-mm@kvack.org" , "linux-kernel@vger.kernel.org" , Peter Zijlstra , "gregkh@linuxfoundation.org" , azurIt , Sameer Nanda Subject: RE: [PATCH] Fix race between oom kill and task exit Thread-Topic: [PATCH] Fix race between oom kill and task exit Thread-Index: AQHO7GkIAtgpkv7roka7vtUbU5xUepo7dWXAgAABbMA= Date: Fri, 29 Nov 2013 02:08:23 +0000 Message-ID: References: <3917C05D9F83184EAA45CE249FF1B1DD0253093A@SHSMSX103.ccr.corp.intel.com> <20131128063505.GN3556@cmpxchg.org> <20131128120018.GL2761@dhcp22.suse.cz> <20131128183830.GD20740@redhat.com> <3917C05D9F83184EAA45CE249FF1B1DD025310D2@SHSMSX103.ccr.corp.intel.com> In-Reply-To: <3917C05D9F83184EAA45CE249FF1B1DD025310D2@SHSMSX103.ccr.corp.intel.com> Accept-Language: zh-CN, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.239.127.40] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 8BIT MIME-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org We will do more stress test in more machine at the same time -----Original Message----- From: Ma, Xindong Sent: Friday, November 29, 2013 10:06 AM To: Oleg Nesterov; Michal Hocko Cc: William Dauchy; Johannes Weiner; akpm@linux-foundation.org; rientjes@google.com; rusty@rustcorp.com.au; linux-mm@kvack.org; linux-kernel@vger.kernel.org; Peter Zijlstra; gregkh@linuxfoundation.org; Tu, Xiaobing; azurIt; Sameer Nanda Subject: RE: [PATCH] Fix race between oom kill and task exit > From: Oleg Nesterov [mailto:oleg@redhat.com] > Sent: Friday, November 29, 2013 2:39 AM > To: Michal Hocko > Cc: William Dauchy; Johannes Weiner; Ma, Xindong; > akpm@linux-foundation.org; rientjes@google.com; rusty@rustcorp.com.au; > linux-mm@kvack.org; linux-kernel@vger.kernel.org; Peter Zijlstra; > gregkh@linuxfoundation.org; Tu, Xiaobing; azurIt; Sameer Nanda > Subject: Re: [PATCH] Fix race between oom kill and task exit > > On 11/28, Michal Hocko wrote: > > > > They are both trying to solve the same issue. Neither of them is > > optimal unfortunately. > > yes, but this one doesn't look right. > > > Oleg said he would look into this and I have seen some patches but > > didn't geto check them. > > Only preparations so far. > > Oleg. I was not aware there's a long story for this issue. I hit this issue a lot of times during stress test and root caused it. After applying my patch, I did extensive test on 5 machines for a long time, it does not reproduced anymore so I submitted the patch. I will do more research on this issue.