From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_2 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 22852C54FD0 for ; Fri, 24 Apr 2020 16:21:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 07C412071E for ; Fri, 24 Apr 2020 16:21:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728128AbgDXQVt (ORCPT ); Fri, 24 Apr 2020 12:21:49 -0400 Received: from mail.kernel.org ([198.145.29.99]:36194 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726908AbgDXQVs (ORCPT ); Fri, 24 Apr 2020 12:21:48 -0400 Received: from gandalf.local.home (cpe-66-24-58-225.stny.res.rr.com [66.24.58.225]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id CEFC520700; Fri, 24 Apr 2020 16:21:47 +0000 (UTC) Date: Fri, 24 Apr 2020 12:21:46 -0400 From: Steven Rostedt To: Tetsuo Handa Cc: Petr Mladek , Sergey Senozhatsky , linux-kernel@vger.kernel.org, Dmitry Safonov , Michal Hocko , Yafang Shao Subject: Re: [PATCH] printk: Add loglevel for "do not print to consoles". Message-ID: <20200424122146.163b1680@gandalf.local.home> In-Reply-To: References: <20200424024239.63607-1-penguin-kernel@I-love.SAKURA.ne.jp> <20200424092816.62a61b1d@gandalf.local.home> <579fbe97-9aae-2b67-03ff-01291b9cbb7d@i-love.sakura.ne.jp> <20200424103131.7987f890@gandalf.local.home> <7ec0b0a3-39ae-0f1c-b8c2-e1e9e60f1223@i-love.sakura.ne.jp> <20200424114225.5a3bab7e@gandalf.local.home> X-Mailer: Claws Mail 3.17.3 (GTK+ 2.24.32; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sat, 25 Apr 2020 01:10:15 +0900 Tetsuo Handa wrote: > KERN_NO_CONSOLES is a mechanism for implementing user decided policy. As long as > userspace can control whether to use KERN_NO_CONSOLES (e.g. sysctl), there should > be no problem with adding KERN_NO_CONSOLES (i.e. this patch) to the kernel side. How would you define what gets "KERN_NO_CONSOLES"? Is it going to be a sysctl switch? Also, how does one control the log level of prints with KERN_NO_CONSOLES? -- Steve