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 E74ABC433E1 for ; Tue, 9 Jun 2020 17:10:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BD69420734 for ; Tue, 9 Jun 2020 17:10:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731600AbgFIRK6 (ORCPT ); Tue, 9 Jun 2020 13:10:58 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35342 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727880AbgFIRKu (ORCPT ); Tue, 9 Jun 2020 13:10:50 -0400 Received: from Galois.linutronix.de (Galois.linutronix.de [IPv6:2a0a:51c0:0:12e:550::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 95CECC05BD1E; Tue, 9 Jun 2020 10:10:50 -0700 (PDT) Received: from bigeasy by Galois.linutronix.de with local (Exim 4.80) (envelope-from ) id 1jihlr-0005Kc-PB; Tue, 09 Jun 2020 19:10:43 +0200 Date: Tue, 9 Jun 2020 19:10:43 +0200 From: Sebastian Andrzej Siewior To: Ramon Fried Cc: Tom Zanussi , LKML , linux-rt-users , Steven Rostedt , Thomas Gleixner , Carsten Emde , John Kacur , Daniel Wagner , Clark Williams , Zhang Xiao Subject: Re: [PATCH RT 1/2] tasklet: Address a race resulting in double-enqueue Message-ID: <20200609171043.vhvms7lowffqm6e4@linutronix.de> References: <6d4c92b28c54d8ca687c29043562de943a373547.1587675252.git.zanussi@kernel.org> <20200609154741.5kesuvl7txz4s3yu@linutronix.de> <20200609163446.efp76qbjzkbtl7nk@linutronix.de> <34E6C220-A85B-4296-AB8E-62DE6D9DC561@gmail.com> <20200609164213.bshzpfuqgioyvtpm@linutronix.de> <61D63A44-E3D9-4E7F-BE08-B887C078F445@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <61D63A44-E3D9-4E7F-BE08-B887C078F445@gmail.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2020-06-09 20:07:06 [+0300], Ramon Fried wrote: > Indeed > I'm truly sorry, I thought our crash kernel is configured as RT as well. > so, as I understand, if I build the RT kernel without preempt enabled I can hit this bug? Don't worry, I should have been better with the details in the log. So you should _always_ hit the warning/bug if you compile a kernel without SMP and RT. If you enable one of these then everything should be fine. Sebastian