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 80DE6C433DF for ; Fri, 29 May 2020 16:37:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 632D62077D for ; Fri, 29 May 2020 16:37:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726882AbgE2QhZ convert rfc822-to-8bit (ORCPT ); Fri, 29 May 2020 12:37:25 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60612 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725795AbgE2QhZ (ORCPT ); Fri, 29 May 2020 12:37:25 -0400 Received: from Galois.linutronix.de (Galois.linutronix.de [IPv6:2a0a:51c0:0:12e:550::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 52519C03E969; Fri, 29 May 2020 09:37:25 -0700 (PDT) Received: from bigeasy by Galois.linutronix.de with local (Exim 4.80) (envelope-from ) id 1jei0Y-0001Bu-Mc; Fri, 29 May 2020 18:37:22 +0200 Date: Fri, 29 May 2020 18:37:22 +0200 From: Sebastian Andrzej Siewior To: Mark Marshall Cc: linux-rt-users , Mark Marshall , thomas.graziadei@omicronenergy.com, Thomas Gleixner , linux-kernel@vger.kernel.org, rostedt@goodmis.org Subject: Re: Kernel crash due to memory corruption with v5.4.26-rt17 and PowerPC e500 Message-ID: <20200529163722.mdxzrj4n3lyzjtfu@linutronix.de> References: <20200529131452.pgj7mx7xaz7n4kz3@linutronix.de> <20200529161518.svpxhkeljafbtdz2@linutronix.de> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8BIT In-Reply-To: <20200529161518.svpxhkeljafbtdz2@linutronix.de> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2020-05-29 18:15:18 [+0200], To Mark Marshall wrote: > In order to get it back into the RT queue I need to understand why it is > required. What exactly is it fixing. Let me stare at for a littleā€¦ it used to be local_irq_disable() which then became preempt_disable() local_irq_disable() due to ARM's limitation. > > Best regards, > > Mark > Sebastian