From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752864AbcCDM02 (ORCPT ); Fri, 4 Mar 2016 07:26:28 -0500 Received: from szxga01-in.huawei.com ([58.251.152.64]:53310 "EHLO szxga01-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751153AbcCDM00 (ORCPT ); Fri, 4 Mar 2016 07:26:26 -0500 Message-ID: <56D97E05.2080106@huawei.com> Date: Fri, 4 Mar 2016 20:22:29 +0800 From: zhong jiang User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:12.0) Gecko/20120428 Thunderbird/12.0.1 MIME-Version: 1.0 To: Tetsuo Handa , LKML , Xishi Qiu , "Linux Memory Management List" Subject: Re: A oops occur when it calls kmem_cache_alloc References: <56D9491E.1020905@huawei.com> <56D96734.6050108@I-love.SAKURA.ne.jp> In-Reply-To: <56D96734.6050108@I-love.SAKURA.ne.jp> Content-Type: text/plain; charset="windows-1252" Content-Transfer-Encoding: 7bit X-Originating-IP: [10.177.29.68] X-CFilter-Loop: Reflected X-Mirapoint-Virus-RAPID-Raw: score=unknown(0), refid=str=0001.0A090203.56D97E79.00A6,ss=1,re=0.000,recu=0.000,reip=0.000,cl=1,cld=1,fgs=0, ip=0.0.0.0, so=2013-06-18 04:22:30, dmn=2013-03-21 17:37:32 X-Mirapoint-Loop-Id: bc623455a898d470282e32368ac4c67c Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2016/3/4 18:45, Tetsuo Handa wrote: > On 2016/03/04 17:36, zhong jiang wrote: >> The vmcore file show the collapse reason that the page had been removed >> when we acqure the page and prepare to remove the page from the slub >> partial list. >> >> The list is protected by the spin_lock from concurrent operation. And I find >> that other core is wating the lock to alloc memory. Therefore , The concurrent >> access should be impossible. >> >> what situatios can happen ? or it is a kernel bug potentially. This question >> almost impossible to produce again. The following is the call statck belonging to >> the module. > No kernel version, no clue. > > > Sorry, The kernel version is 3.4 stable version. And The mainline , by comparison, have no relative modification. Thanks zhongjiang