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[2620:137:e000::1:20]) by mx.google.com with ESMTP id ek6-20020a056402370600b0042ac0eb02acsi184081edb.338.2022.05.17.13.08.35; Tue, 17 May 2022 13:09:04 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=fail header.i=@igalia.com header.s=20170329 header.b=cRMrVSVT; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1351826AbiEQSOf (ORCPT + 99 others); Tue, 17 May 2022 14:14:35 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36234 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1351992AbiEQSN4 (ORCPT ); Tue, 17 May 2022 14:13:56 -0400 Received: from fanzine2.igalia.com (fanzine.igalia.com [178.60.130.6]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 05D2E50E0D; Tue, 17 May 2022 11:13:32 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=igalia.com; s=20170329; h=Content-Transfer-Encoding:Content-Type:In-Reply-To:From: References:Cc:To:Subject:MIME-Version:Date:Message-ID:Sender:Reply-To: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=6MSK1Z4Nv/e1GFKFinCP8P3dIYao0CoLyUe3quXpDhY=; b=cRMrVSVTR+3cn6FVG65SC4Au0y UkLE3SVfqGk36g/jG1E9IomGRvED5Awi+eOSCTntuGE0jPXl5+kfHlbKsvhvVjaCNf8y4mBWXGPlT 8r/o/CMKhbUaIdrKhLkt446cgXa07HTSiorku/w0xJvIn3aE4uqi2qj8QGi7eb4Kmsg0/Wh5BR8Vi YCGb8f9djqv6fWXVwjRpFQtg+9b6W6H4TQisr9ZwQKSIB4SsmfEWL196/jrcNQFL2lm66S4LfYE8s uZ+fz2jSIIuBy2Np//l8BP/gbXHu+JyZVeJsb8IAXoZSlvi3RYMR9sSIMXj8sSzR7kYxeP4KKKokk nGGtp5Zg==; Received: from 200-161-159-120.dsl.telesp.net.br ([200.161.159.120] helo=[192.168.1.60]) by fanzine2.igalia.com with esmtpsa (Cipher TLS1.3:ECDHE_X25519__RSA_PSS_RSAE_SHA256__AES_128_GCM:128) (Exim) id 1nr1gv-008nSU-6m; Tue, 17 May 2022 20:13:05 +0200 Message-ID: <62a63fc2-346f-f375-043a-fa21385279df@igalia.com> Date: Tue, 17 May 2022 15:12:25 -0300 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.9.0 Subject: Re: [PATCH 21/30] panic: Introduce the panic pre-reboot notifier list Content-Language: en-US To: "Luck, Tony" , Petr Mladek , Dinh Nguyen Cc: "akpm@linux-foundation.org" , "bhe@redhat.com" , "kexec@lists.infradead.org" , "linux-kernel@vger.kernel.org" , "bcm-kernel-feedback-list@broadcom.com" , "linuxppc-dev@lists.ozlabs.org" , "linux-alpha@vger.kernel.org" , "linux-edac@vger.kernel.org" , "linux-hyperv@vger.kernel.org" , "linux-leds@vger.kernel.org" , "linux-mips@vger.kernel.org" , "linux-parisc@vger.kernel.org" , "linux-pm@vger.kernel.org" , "linux-remoteproc@vger.kernel.org" , "linux-s390@vger.kernel.org" , "linux-tegra@vger.kernel.org" , "linux-um@lists.infradead.org" , "linux-xtensa@linux-xtensa.org" , "netdev@vger.kernel.org" , "openipmi-developer@lists.sourceforge.net" , "rcu@vger.kernel.org" , "sparclinux@vger.kernel.org" , "xen-devel@lists.xenproject.org" , "x86@kernel.org" , "kernel-dev@igalia.com" , "kernel@gpiccoli.net" , "halves@canonical.com" , "fabiomirmar@gmail.com" , "alejandro.j.jimenez@oracle.com" , "andriy.shevchenko@linux.intel.com" , "arnd@arndb.de" , "bp@alien8.de" , "corbet@lwn.net" , "d.hatayama@jp.fujitsu.com" , "dave.hansen@linux.intel.com" , "dyoung@redhat.com" , "Tang, Feng" , "gregkh@linuxfoundation.org" , "mikelley@microsoft.com" , "hidehiro.kawai.ez@hitachi.com" , "jgross@suse.com" , "john.ogness@linutronix.de" , "keescook@chromium.org" , "luto@kernel.org" , "mhiramat@kernel.org" , "mingo@redhat.com" , "paulmck@kernel.org" , "peterz@infradead.org" , "rostedt@goodmis.org" , "senozhatsky@chromium.org" , "stern@rowland.harvard.edu" , "tglx@linutronix.de" , "vgoyal@redhat.com" , "vkuznets@redhat.com" , "will@kernel.org" , Alex Elder , Alexander Gordeev , Anton Ivanov , Benjamin Herrenschmidt , Bjorn Andersson , Boris Ostrovsky , Chris Zankel , Christian Borntraeger , Corey Minyard , Dexuan Cui , "H. Peter Anvin" , Haiyang Zhang , Heiko Carstens , Helge Deller , Ivan Kokshaysky , "James E.J. Bottomley" , James Morse , Johannes Berg , "K. Y. Srinivasan" , Mathieu Poirier , Matt Turner , Mauro Carvalho Chehab , Max Filippov , Michael Ellerman , Paul Mackerras , Pavel Machek , Richard Weinberger , Robert Richter , Stefano Stabellini , Stephen Hemminger , Sven Schnelle , Vasily Gorbik , Wei Liu References: <20220427224924.592546-1-gpiccoli@igalia.com> <20220427224924.592546-22-gpiccoli@igalia.com> <63a74b56-89ef-8d1f-d487-cdb986aab798@igalia.com> <599b72f6-76a4-8e6d-5432-56fb1ffd7e0b@igalia.com> <06d85642fef24bc482642d669242654b@intel.com> From: "Guilherme G. Piccoli" In-Reply-To: <06d85642fef24bc482642d669242654b@intel.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,NICE_REPLY_A,SPF_HELO_NONE, SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 17/05/2022 14:02, Luck, Tony wrote: >> Tony / Dinh - can I just *skip* this notifier *if kdump* is set or else >> we run the code as-is? Does that make sense to you? > > The "skip" option sounds like it needs some special flag associated with > an entry on the notifier chain. But there are other notifier chains ... so that > sounds messy to me. > > Just all the notifiers in priority order. If any want to take different actions > based on kdump status, change the code. That seems more flexible than > an "all or nothing" approach by skipping. > > -Tony I guess I've expressed myself in a poor way - sorry! What I'm planning to do in the altera_edac notifier is: if (kdump_is_set) return; /* regular code */ In other words: if the kdump is set, this notifier will be effectively a nop (although it's gonna be called). Lemme know your thoughts Tony, if that makes sense. Thanks, Guilherme