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=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,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 4E4B9C10DCE for ; Wed, 11 Mar 2020 01:26:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 08DF721D56 for ; Wed, 11 Mar 2020 01:26:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1583890009; bh=eMDYXR2nJZoF3367Sc7t4Lc1WZJdnWQnD5UrvNe19Jg=; h=Date:From:To:Cc:Subject:In-Reply-To:References:List-ID:From; b=v5G8bvOxJ6Lk3iuqAU1KH6GTHEaqfylnhrcm85JIr4jdYXwFOE63Av93Mt/SuulF/ E7fbcAwXWNIoY0uDKd7iWm6EM1+GrAdf6c677xh4ZuFxcVgCwf2V4cVt3IlOHvaNl7 eVBJuGYyd2SNeqd1ukabu6G7gmYL1ndSWUXXAFDc= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727648AbgCKB0s (ORCPT ); Tue, 10 Mar 2020 21:26:48 -0400 Received: from mail.kernel.org ([198.145.29.99]:36192 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727528AbgCKB0s (ORCPT ); Tue, 10 Mar 2020 21:26:48 -0400 Received: from localhost.localdomain (c-73-231-172-41.hsd1.ca.comcast.net [73.231.172.41]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 9464D205ED; Wed, 11 Mar 2020 01:26:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1583890008; bh=eMDYXR2nJZoF3367Sc7t4Lc1WZJdnWQnD5UrvNe19Jg=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=T8TmCtDpE64khBhTPI+ccVAiSHhT0IlO0Loa/vazicprYilRGiHWoolabqja0dOCG j/KdC66zHZydqdJpoJhd8CY9CsR/jH2HoSgl7KI9Mr7x2JPZe7gbPkfN+8p0MZj062 iiRfYkMcoSbbzpqp/mg2jjNJZ3kZS3jGbGHWKzuw= Date: Tue, 10 Mar 2020 18:26:47 -0700 From: Andrew Morton To: Randy Dunlap Cc: "Guilherme G. Piccoli" , linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, mcgrof@kernel.org, keescook@chromium.org, yzaikin@google.com, tglx@linutronix.de, kernel@gpiccoli.net Subject: Re: [PATCH] panic: Add sysctl/cmdline to dump all CPUs backtraces on oops event Message-Id: <20200310182647.59f6ea73aad3aca619065f1e@linux-foundation.org> In-Reply-To: <93f20e59-41b1-48ad-b0eb-e670b18994d5@infradead.org> References: <20200310163700.19186-1-gpiccoli@canonical.com> <93f20e59-41b1-48ad-b0eb-e670b18994d5@infradead.org> X-Mailer: Sylpheed 3.5.1 (GTK+ 2.24.31; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-doc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-doc@vger.kernel.org On Tue, 10 Mar 2020 13:59:15 -0700 Randy Dunlap wrote: > > +oops_all_cpu_backtrace: > > +================ > > + > > +Determines if kernel should NMI all CPUs to dump their backtraces when > > I would much prefer that to be written without using NMI as a verb. "Non maskably interrupt" ;) I think it's OK. Concise and the meaning is clear. Why do we need the kernel boot parameter? Isn't /proc/sys/kernel/oops_all_cpu_backtrace sufficient?