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=-7.6 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SPF_PASS,USER_AGENT_MUTT autolearn=ham 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 0D0A1C43387 for ; Tue, 18 Dec 2018 15:03:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id CE20421852 for ; Tue, 18 Dec 2018 15:03:23 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=alien8.de header.i=@alien8.de header.b="gaJO7aNI" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726847AbeLRPDX (ORCPT ); Tue, 18 Dec 2018 10:03:23 -0500 Received: from mail.skyhub.de ([5.9.137.197]:44810 "EHLO mail.skyhub.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726827AbeLRPDW (ORCPT ); Tue, 18 Dec 2018 10:03:22 -0500 Received: from zn.tnic (p200300EC2BD17800C11009BD73D4094D.dip0.t-ipconnect.de [IPv6:2003:ec:2bd1:7800:c110:9bd:73d4:94d]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.skyhub.de (SuperMail on ZX Spectrum 128k) with ESMTPSA id D9AFE1EC0629; Tue, 18 Dec 2018 16:03:20 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=alien8.de; s=dkim; t=1545145401; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:in-reply-to:in-reply-to: references:references; bh=AfPjf7ob1qdBDhGWYEjGXpUU+3vxeqXTTES6fdUZ0QM=; b=gaJO7aNIx1ZTaZ4YEa15E4rjWF+yrfW/OCAzWTGC7l4KjE7blrQIks2Y8Gfoz76okmTwGf CZEkBI+50UWlwNemnvst2cQ8oH60VJcHVZa2kQh8q1vh4Cpv6c/50GWzoI5Ag63Gbowhx8 A5RmNo+NSIKDuN/uabqHnVudvIMz5Kc= Date: Tue, 18 Dec 2018 16:03:13 +0100 From: Borislav Petkov To: Sergey Senozhatsky Cc: Sergey Senozhatsky , Peter Zijlstra , Petr Mladek , Steven Rostedt , Andrew Morton , linux-kernel@vger.kernel.org Subject: Re: [RFC][PATCH] printk: increase devkmsg write() ratelimit Message-ID: <20181218150313.GI7485@zn.tnic> References: <20181218091842.4996-1-sergey.senozhatsky@gmail.com> <20181218104812.GC15430@hirez.programming.kicks-ass.net> <20181218111701.GA32522@jagdpanzerIV> <20181218114709.GF7485@zn.tnic> <20181218130750.GA665@tigerII.localdomain> <20181218142623.GH7485@zn.tnic> <20181218145558.GD665@tigerII.localdomain> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20181218145558.GD665@tigerII.localdomain> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Dec 18, 2018 at 11:55:58PM +0900, Sergey Senozhatsky wrote: > Good question. Theoretically, there can be some interesting stuff. > Examples: https://bugzilla.redhat.com/show_bug.cgi?id=1515373#c6 > or https://github.com/systemd/systemd/issues/5433 Just like that last page says, people should use the printk.devkmsg= option when they wanna see all messages. Normally, we do add cmdline options to the kernel cmdline when debugging, like debug ignore_loglevel log_buf_len=16M ... etc and this is no different AFAICT. -- Regards/Gruss, Boris. Good mailing practices for 400: avoid top-posting and trim the reply.