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=-0.8 required=3.0 tests=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 EFC58C2BA83 for ; Fri, 14 Feb 2020 13:43:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C821C2168B for ; Fri, 14 Feb 2020 13:43:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728437AbgBNNnB (ORCPT ); Fri, 14 Feb 2020 08:43:01 -0500 Received: from Galois.linutronix.de ([193.142.43.55]:54616 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728083AbgBNNnB (ORCPT ); Fri, 14 Feb 2020 08:43:01 -0500 Received: from localhost ([127.0.0.1] helo=vostro.local) by Galois.linutronix.de with esmtp (Exim 4.80) (envelope-from ) id 1j2bFD-0006BL-5G; Fri, 14 Feb 2020 14:42:59 +0100 From: John Ogness To: Sebastian Andrzej Siewior Cc: Sebastien Fabre , "linux-rt-users\@vger.kernel.org" Subject: Re: Crash tool issue since printk re-implementation References: <20200214123431.rsgw62fftclifs3l@linutronix.de> Date: Fri, 14 Feb 2020 14:42:57 +0100 In-Reply-To: <20200214123431.rsgw62fftclifs3l@linutronix.de> (Sebastian Andrzej Siewior's message of "Fri, 14 Feb 2020 13:34:31 +0100") Message-ID: <874kvtffoe.fsf@linutronix.de> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.4 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-rt-users-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-rt-users@vger.kernel.org On 2020-02-14, Sebastian Andrzej Siewior wrote: > On 2020-02-12 12:10:23 [+0000], Sebastien Fabre wrote: >> Since kernel v5.0, PREEMPT_RT patches contain printk >> re-implementation. This re-implementation removes some log symbols in >> VMCOREINFO and crash tool cannot retrieve kernel logs (because >> symbols no more exist). Is this impact on crash expected? If so, how >> can we retrieve a functional crash tool with kernel v5.0 (and >> following) ? > > It is known, yes. I'm aware of crash and the gdb scritps should also > suffer from this. Perhaps this should be listed under the "Known issues" of the PREEMPT_RT release announcements. John Ogness