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=-0.6 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 D9BE7C2BA1A for ; Sat, 25 Apr 2020 00:46:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A888F2076C for ; Sat, 25 Apr 2020 00:46:15 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="Utrycj8R" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726186AbgDYAqO (ORCPT ); Fri, 24 Apr 2020 20:46:14 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55036 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726031AbgDYAqO (ORCPT ); Fri, 24 Apr 2020 20:46:14 -0400 Received: from mail-pg1-x544.google.com (mail-pg1-x544.google.com [IPv6:2607:f8b0:4864:20::544]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 26539C09B049 for ; Fri, 24 Apr 2020 17:46:14 -0700 (PDT) Received: by mail-pg1-x544.google.com with SMTP id d17so5466722pgo.0 for ; Fri, 24 Apr 2020 17:46:14 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:date:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=gpKno2/9LLrGnmiYliL+8wMwCd6lAiKJIbyOrb2sEM8=; b=Utrycj8RQ2UbQtaVOZjXa/vUTZrTgTGdApu6Ni+xsBeVxenNx+vRgS1eZAH+gTFA16 h9pljuKHuzFekVMLEb60RB+F8peWekZUD896vDqZuL4MSPGJ+NM1ucL8auxZLr9wrx3V jg8AYjxpuL3aC0Nt4qDtfLGh0lERsK0tLxgD8Xk2ccGRHGKCbxSNc7geEkNUNBodWs7G r1Hfa6RLIzWn5Tv5tUFlLb4ZKJuuaXWgvnocLvFiIXJnlC3+i7SOpFptwNc/0NvyQwv6 Ihco3KzBhjNo8ZfsYr2TWoYUE8NXF7n5TicPmu6BwX/8MoDIyf6LUpZ4ToyS4eDp4agf OsUQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:date:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=gpKno2/9LLrGnmiYliL+8wMwCd6lAiKJIbyOrb2sEM8=; b=gGKuVUfvSNTjyMf5mLXt2nQZsK3UUfoPs3RTf7ABW3Oa89RS9AN8Eptr+UXa3fathF nMEEPArg4GNZeZKYFhU+GIsq5CYOnSDOGdc/QSbbaA3kkvfi05e/KeUgYO6M6JvG8lMo /yKP202xJ/XiYVEhr/NsB5JU6OTvmL1cCNmSRpB9Abj2hcQOTG6faBfnzcFnW5dmUhCm l44zd1zKmwjKRhMj9DOzWRAmX7c9gDzytmaUkpkfOJZPktKtTlqHMVXYNa6WiIoFC3xy nY4tU6usvugBFdIOGwljOxp5eXSq4qdWuQsOAlFwXfoHxBWqGQPkHD2IzXINa0nI+S4h CnnQ== X-Gm-Message-State: AGi0PuauTu7J96L7t8N+uMPL3cos2guo4JmNxTbgzhmQm0q2Tu/a2wUy KovaiTMaGTwfw+S7zGELCP4= X-Google-Smtp-Source: APiQypL4ysxzEuNG2J1NXAZs5zgNM9JCMeNzVNztjunhETOY7aPU2N2uF6w2zSwIgVgv/tnlJ/WdUA== X-Received: by 2002:a63:2ad1:: with SMTP id q200mr12244066pgq.252.1587775573608; Fri, 24 Apr 2020 17:46:13 -0700 (PDT) Received: from localhost (146.85.30.125.dy.iij4u.or.jp. [125.30.85.146]) by smtp.gmail.com with ESMTPSA id n16sm6842158pfq.61.2020.04.24.17.46.12 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 24 Apr 2020 17:46:12 -0700 (PDT) From: Sergey Senozhatsky X-Google-Original-From: Sergey Senozhatsky Date: Sat, 25 Apr 2020 09:46:09 +0900 To: Tetsuo Handa Cc: Petr Mladek , Sergey Senozhatsky , Steven Rostedt , 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: <20200425004609.GE8982@jagdpanzerIV.localdomain> References: <20200424024239.63607-1-penguin-kernel@I-love.SAKURA.ne.jp> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200424024239.63607-1-penguin-kernel@I-love.SAKURA.ne.jp> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On (20/04/24 11:42), Tetsuo Handa wrote: [..] > @@ -19,6 +19,7 @@ static inline int printk_get_level(const char *buffer) > switch (buffer[1]) { > case '0' ... '7': > case 'c': /* KERN_CONT */ > + case 'S': /* KERN_NO_CONSOLES */ > return buffer[1]; > } > } So this means NO_CONSOLES_AT_ALL, slow + fast ones. I wonder if this wants to be NO_SLOW_CONSOLES instead. Which then brings us to the next question - can this be done with per-console loglevel setting? -ss