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 03338C35679 for ; Mon, 24 Feb 2020 09:43:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D4E4D20836 for ; Mon, 24 Feb 2020 09:43:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727242AbgBXJnx (ORCPT ); Mon, 24 Feb 2020 04:43:53 -0500 Received: from Galois.linutronix.de ([193.142.43.55]:49161 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726452AbgBXJnx (ORCPT ); Mon, 24 Feb 2020 04:43:53 -0500 Received: from bigeasy by Galois.linutronix.de with local (Exim 4.80) (envelope-from ) id 1j6AHG-0006zr-03; Mon, 24 Feb 2020 10:43:50 +0100 Date: Mon, 24 Feb 2020 10:43:49 +0100 From: Sebastian Andrzej Siewior To: zanussi@kernel.org Cc: LKML , linux-rt-users , Steven Rostedt , Thomas Gleixner , Carsten Emde , John Kacur , Daniel Wagner Subject: Re: [PATCH RT 15/25] sched: migrate_enable: Use select_fallback_rq() Message-ID: <20200224094349.5x6dca4tggtmmbnq@linutronix.de> References: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2020-02-21 15:24:43 [-0600], zanussi@kernel.org wrote: > From: Scott Wood > > v4.14.170-rt75-rc1 stable review patch. > If anyone has any objections, please let me know. This creates bug which is stuffed later via sched: migrate_enable: Busy loop until the migration request is completed So if apply this, please take the bug fix, too. This is Stevens queue for reference: |[PATCH RT 22/30] sched: migrate_enable: Use select_fallback_rq() ^^ bug introduced |[PATCH RT 23/30] sched: Lazy migrate_disable processing |[PATCH RT 24/30] sched: migrate_enable: Use stop_one_cpu_nowait() |[PATCH RT 25/30] Revert "ARM: Initialize split page table locks for vector page" |[PATCH RT 26/30] locking: Make spinlock_t and rwlock_t a RCU section on RT |[PATCH RT 27/30] sched/core: migrate_enable() must access takedown_cpu_task on !HOTPLUG_CPU |[PATCH RT 28/30] lib/smp_processor_id: Adjust check_preemption_disabled() |[PATCH RT 29/30] sched: migrate_enable: Busy loop until the migration request is completed ^^ bug fixed Sebastian