From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pa0-f43.google.com (mail-pa0-f43.google.com [209.85.220.43]) by kanga.kvack.org (Postfix) with ESMTP id 0C0BA6B0038 for ; Sun, 29 Nov 2015 21:54:24 -0500 (EST) Received: by pabfh17 with SMTP id fh17so174046995pab.0 for ; Sun, 29 Nov 2015 18:54:23 -0800 (PST) Received: from szxga01-in.huawei.com (szxga01-in.huawei.com. [58.251.152.64]) by mx.google.com with ESMTPS id r72si26087140pfi.0.2015.11.29.18.54.19 for (version=TLS1 cipher=AES128-SHA bits=128/128); Sun, 29 Nov 2015 18:54:23 -0800 (PST) From: 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> MIME-Version: 1.0 Content-Type: text/plain Sender: owner-linux-mm@kvack.org List-ID: To: linux-mm@kvack.org, linux-kernel@vger.kernel.org, David.Woodhouse@intel.com, zhihui.gao@huawei.com Cc: chenjie6@huawei.com, lizefan@huawei.com, akpm@linux-foundation.org, stable@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 -- 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