From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-lf0-f72.google.com (mail-lf0-f72.google.com [209.85.215.72]) by kanga.kvack.org (Postfix) with ESMTP id 98FAD6B0033 for ; Sun, 10 Dec 2017 16:49:44 -0500 (EST) Received: by mail-lf0-f72.google.com with SMTP id y124so4109129lfc.15 for ; Sun, 10 Dec 2017 13:49:44 -0800 (PST) Received: from mail-sor-f65.google.com (mail-sor-f65.google.com. [209.85.220.65]) by mx.google.com with SMTPS id b76sor2357215ljf.25.2017.12.10.13.49.38 for (Google Transport Security); Sun, 10 Dec 2017 13:49:38 -0800 (PST) Message-ID: <1512942574.23718.7.camel@gmail.com> Subject: Re: Google Chrome cause locks held in system (kernel 4.15 rc2) From: mikhail Date: Mon, 11 Dec 2017 02:49:34 +0500 In-Reply-To: <201712092314.IGI39555.MtFFVLJFOQOSOH@I-love.SAKURA.ne.jp> References: <1512705038.7843.6.camel@gmail.com> <20171208040556.GG19219@magnolia> <1512825438.4168.14.camel@gmail.com> <201712092314.IGI39555.MtFFVLJFOQOSOH@I-love.SAKURA.ne.jp> Content-Type: text/plain; charset="UTF-8" Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Tetsuo Handa , mhocko@kernel.org Cc: darrick.wong@oracle.com, linux-xfs@vger.kernel.org, linux-mm@kvack.org On Sat, 2017-12-09 at 23:14 +0900, Tetsuo Handa wrote: > Under OOM lockup situation, kernel messages can unlikely be saved to > syslog > files, for writing to files involves memory allocation. Can you set > up > netconsole or serial console explained at > http://events.linuxfoundation.org/sites/events/files/slides/LCJ2014-e > n_0.pdf ? > If neither console is possible, it would become difficult to debug. netconsole works only within local network? destination ip may be from another network? [11415.184163] netpoll: netconsole: local port 6665 [11415.184168] netpoll: netconsole: local IPv4 address 0.0.0.0 [11415.184169] netpoll: netconsole: interface 'enp2s0' [11415.184171] netpoll: netconsole: remote port 6666 [11415.184173] netpoll: netconsole: remote IPv4 address 213.136.82.171 [11415.184174] netpoll: netconsole: remote ethernet address ff:ff:ff:ff:ff:ff [11415.184179] netpoll: netconsole: local IP 192.168.1.85 [11415.184738] console [netcon0] enabled [11415.184741] netconsole: network logging started But on remote host nothing happens when I do SysRq-t Of course I compiled and launched ./udplogger on remote host under tmux. And add udp port 6666 to firewalld rule. # firewall-cmd --permanent --add-port=6666/udp && systemctl restart firewalld -- 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