From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757406AbcBIQHp (ORCPT ); Tue, 9 Feb 2016 11:07:45 -0500 Received: from mx1.redhat.com ([209.132.183.28]:56615 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754648AbcBIQHo (ORCPT ); Tue, 9 Feb 2016 11:07:44 -0500 Message-ID: <56BA0ECE.2050106@redhat.com> Date: Tue, 09 Feb 2016 17:07:42 +0100 From: Denys Vlasenko User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.2.0 MIME-Version: 1.0 To: Steven Rostedt CC: linux-kernel@vger.kernel.org, srostedt@redhat.com, Tejun Heo , Peter Hurley Subject: Re: [PATCH] printk: avoid livelock if another CPU printks continuously References: <1454963703-20433-1-git-send-email-dvlasenk@redhat.com> <20160208161123.2ceb601d@gandalf.local.home> <56B9FEE4.3010502@redhat.com> <20160209101707.540641fb@gandalf.local.home> <56BA04AD.7090903@redhat.com> <20160209105024.3606f233@gandalf.local.home> In-Reply-To: <20160209105024.3606f233@gandalf.local.home> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 02/09/2016 04:50 PM, Steven Rostedt wrote: > One thing is to find the spamming code and fix that. We can't rely that there won't be never-ending concurrent printks, right? For one, in many setups user can cause printk flood. I think we must ensure that printk does not livelock.