From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail6.bemta8.messagelabs.com (mail6.bemta8.messagelabs.com [216.82.243.55]) by kanga.kvack.org (Postfix) with ESMTP id A165F6B0012 for ; Tue, 31 May 2011 03:05:07 -0400 (EDT) Received: from m4.gw.fujitsu.co.jp (unknown [10.0.50.74]) by fgwmail5.fujitsu.co.jp (Postfix) with ESMTP id 748A23EE0C3 for ; Tue, 31 May 2011 16:05:03 +0900 (JST) Received: from smail (m4 [127.0.0.1]) by outgoing.m4.gw.fujitsu.co.jp (Postfix) with ESMTP id 5389845DED7 for ; Tue, 31 May 2011 16:05:03 +0900 (JST) Received: from s4.gw.fujitsu.co.jp (s4.gw.fujitsu.co.jp [10.0.50.94]) by m4.gw.fujitsu.co.jp (Postfix) with ESMTP id 39A0645DED5 for ; Tue, 31 May 2011 16:05:03 +0900 (JST) Received: from s4.gw.fujitsu.co.jp (localhost.localdomain [127.0.0.1]) by s4.gw.fujitsu.co.jp (Postfix) with ESMTP id 657431DB802F for ; Tue, 31 May 2011 16:05:02 +0900 (JST) Received: from ml13.s.css.fujitsu.com (ml13.s.css.fujitsu.com [10.240.81.133]) by s4.gw.fujitsu.co.jp (Postfix) with ESMTP id EB23C1DB8041 for ; Tue, 31 May 2011 16:05:01 +0900 (JST) Message-ID: <4DE49314.3070105@jp.fujitsu.com> Date: Tue, 31 May 2011 16:04:52 +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: <1973273.317151.1306817525160.JavaMail.root@zmail06.collab.prod.int.phx2.redhat.com> In-Reply-To: <1973273.317151.1306817525160.JavaMail.root@zmail06.collab.prod.int.phx2.redhat.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 >> - If you run the same program as root, non root process and privilege >> explicit >> dropping processes (e.g. irqbalance) will be killed at first. > Hmm, at least there were some programs were root processes but were killed > first. > [ pid] ppid uid total_vm rss swap score_adj name > [ 5720] 5353 0 24421 257 0 0 sshd > [ 5353] 1 0 15998 189 0 0 sshd > [ 5451] 1 0 19648 235 0 0 master > [ 1626] 1 0 2287 129 0 0 dhclient Hi I can't reproduce this too. Are you sure these processes have a full root privilege? I've made new debugging patch. After applying following patch, do these processes show cap=1? index f0e34d4..fe788df 100644 --- a/mm/oom_kill.c +++ b/mm/oom_kill.c @@ -429,7 +429,7 @@ static void dump_tasks(const struct mem_cgroup *mem, const nodemask_t *no struct task_struct *p; struct task_struct *task; - pr_info("[ pid] ppid uid total_vm rss swap score_adj name\n"); + pr_info("[ pid] ppid uid cap total_vm rss swap score_adj name\n"); for_each_process(p) { if (oom_unkillable_task(p, mem, nodemask)) continue; @@ -444,9 +444,9 @@ static void dump_tasks(const struct mem_cgroup *mem, const nodemask_t *no continue; } - pr_info("[%6d] %6d %5d %8lu %8lu %8lu %9d %s\n", + pr_info("[%6d] %6d %5d %3d %8lu %8lu %8lu %9d %s\n", task_tgid_nr(task), task_tgid_nr(task->real_parent), - task_uid(task), + task_uid(task), has_capability_noaudit(task, CAP_SYS_ADMIN), task->mm->total_vm, get_mm_rss(task->mm) + task->mm->nr_ptes, get_mm_counter(task->mm, MM_SWAPENTS), -- 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