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=-2.6 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_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 BE443C43381 for ; Mon, 4 Mar 2019 02:17:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8592B20830 for ; Mon, 4 Mar 2019 02:17:53 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="PfqYzSfo" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726050AbfCDCRw (ORCPT ); Sun, 3 Mar 2019 21:17:52 -0500 Received: from mail-pg1-f195.google.com ([209.85.215.195]:46361 "EHLO mail-pg1-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725938AbfCDCRv (ORCPT ); Sun, 3 Mar 2019 21:17:51 -0500 Received: by mail-pg1-f195.google.com with SMTP id 196so1888700pgf.13 for ; Sun, 03 Mar 2019 18:17:51 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=gp6FsIBeEB2eF+QQhnkOtu/SFRoYZGjfV3jGDOoq5Wc=; b=PfqYzSfoMwEGqT+/1fUW73s5mAW2nk4i/nIIWe5NK4P9kFr13DolHIkAIEtHTZFDJj /Gu47q0W2ByO9ZnqTOD/ulvXojjdz1j8a1c2gYNDxYDQ+EfIpnDlcFHoo5hmBUMOcmhn px7+vtYlMhvxGdn/P6Mm77iLqG7zaT+Nk8yCE16S+UV0FyhUYl3Btz30DzuOMrUDynBg x2wtTES4gBHfIVckPDUsOpOPGxv+shZ90FUtB1TkAa36nRifu6BQpwnwBRxyfHAhbL/L eje/S/1/S+qXioosq0EQWATjbOx/GbUbDhS90xbOAmRYcSvpCyvKD3sfHgE3u1yfyw1E VG+w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to:user-agent; bh=gp6FsIBeEB2eF+QQhnkOtu/SFRoYZGjfV3jGDOoq5Wc=; b=nKd6XAjkYAqydcATxnp9t8tzxQ3jJQ3WIEdlnWw5lV3H3cVdczdv8ZAq8PR2dNdy7T pr48tQhazj85cJBFpEYaq0TmPRAl60rT6mtT2q+uPLN/mvuXV5vg5CXWRMa6dIdAqjCY H7XYiPArdGsWqe4NNkOAY8/dGefuNHFt70eLW0XB2V8yqUQFfwcK+8qKahGkeWLOZ1k4 igxtHWZO3wSypbJEWYKnn8rNhv1xBfo7u8X/oytmMcz8hCHUZdb/8spTRij3mepYlZ05 TF60hgEGhxBqPcvAfyucbeylidpd6r2/+bX5SQvYRoURnvatY82qzcr85VnlptyrdBAV 8cng== X-Gm-Message-State: APjAAAVgu5aXbTL5C0GKIbpSEB/r1kI/Oj1pb0ZzQTuVacraMQOeyWRy R+FJ42IWbPelOdsSsMitlkY= X-Google-Smtp-Source: APXvYqwPMueZgKHmX1CK0Cm2lsL3jleGK09bfhiO1tpwvo/f4E+y5YZ4k67GbrXb2V8TLq7eSVj0Aw== X-Received: by 2002:a17:902:ba84:: with SMTP id k4mr18156422pls.103.1551665870985; Sun, 03 Mar 2019 18:17:50 -0800 (PST) Received: from localhost ([175.223.38.45]) by smtp.gmail.com with ESMTPSA id 71sm8882466pgc.23.2019.03.03.18.17.48 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Sun, 03 Mar 2019 18:17:49 -0800 (PST) Date: Mon, 4 Mar 2019 11:17:45 +0900 From: Sergey Senozhatsky To: Feng Tang Cc: Andrew Morton , Petr Mladek , linux-kernel@vger.kernel.org, Thomas Gleixner , Kees Cook , Borislav Petkov , Sergey Senozhatsky , Steven Rostedt , Andi Kleen , Peter Zijlstra , Greg Kroah-Hartman , Jiri Slaby , Sasha Levin Subject: Re: [PATCH v6] panic: Avoid the extra noise dmesg Message-ID: <20190304021745.GA23578@jagdpanzerIV> References: <1551430186-24169-1-git-send-email-feng.tang@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1551430186-24169-1-git-send-email-feng.tang@intel.com> User-Agent: Mutt/1.11.3 (2019-02-01) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On (03/01/19 16:49), Feng Tang wrote: > When kernel panic happens, it will first print the panic call stack, > then the ending msg like: > > [ 35.743249] ---[ end Kernel panic - not syncing: Fatal exception > [ 35.749975] ------------[ cut here ]------------ > > The above message are very useful for debugging. > > But if system is configured to not reboot on panic, say the "panic_timeout" > parameter equals 0, it will likely print out many noisy message like > WARN() call stack for each and every CPU except the panic one, messages > like below: [..] Acked-by: Sergey Senozhatsky -ss