From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752208AbbK3Cyu (ORCPT ); Sun, 29 Nov 2015 21:54:50 -0500 Received: from szxga01-in.huawei.com ([58.251.152.64]:24535 "EHLO szxga01-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751909AbbK3Cyl (ORCPT ); Sun, 29 Nov 2015 21:54:41 -0500 From: To: , , , CC: , , , Subject: [PATCH] bugfix oom kill init lead panic Date: Mon, 30 Nov 2015 18:54:29 +0800 Message-ID: <1448880869-20506-1-git-send-email-chenjie6@huawei.com> X-Mailer: git-send-email 1.8.0 MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.67.54.28] X-CFilter-Loop: Reflected X-Mirapoint-Virus-RAPID-Raw: score=unknown(0), refid=str=0001.0A020204.565BB98D.001B,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: bdafbd1035eec7c76b5cb653a43924fa Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: chenjie when oom happened we can see: Out of memory: Kill process 9134 (init) score 3 or sacrifice child Killed process 9134 (init) total-vm:1868kB, anon-rss:84kB, file-rss:572kB Kill process 1 (init) sharing same memory ... Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000009 That's because: the busybox init will vfork a process,oom_kill_process found the init not the children,their mm is the same when vfork. Cc: Signed-off-by: Chen Jie --- mm/oom_kill.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/oom_kill.c b/mm/oom_kill.c index 4d87d7c..de77cbc 100644 --- a/mm/oom_kill.c +++ b/mm/oom_kill.c @@ -513,7 +513,7 @@ void oom_kill_process(struct task_struct *p, gfp_t gfp_mask, int order, rcu_read_lock(); for_each_process(p) if (p->mm == mm && !same_thread_group(p, victim) && - !(p->flags & PF_KTHREAD)) { + !(p->flags & PF_KTHREAD) && !is_global_init(p)) { if (p->signal->oom_score_adj == OOM_SCORE_ADJ_MIN) continue; -- 1.8.0