From patchwork Thu Jan 23 20:39:33 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Steven Rostedt X-Patchwork-Id: 213254 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=-6.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS autolearn=unavailable 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 664F4C33CB6 for ; Thu, 23 Jan 2020 20:41:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 38440246B1 for ; Thu, 23 Jan 2020 20:41:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729221AbgAWUjo (ORCPT ); Thu, 23 Jan 2020 15:39:44 -0500 Received: from mail.kernel.org ([198.145.29.99]:45746 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729159AbgAWUjo (ORCPT ); Thu, 23 Jan 2020 15:39:44 -0500 Received: from gandalf.local.home (cpe-66-24-58-225.stny.res.rr.com [66.24.58.225]) (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 E64952467E; Thu, 23 Jan 2020 20:39:43 +0000 (UTC) Received: from rostedt by gandalf.local.home with local (Exim 4.93) (envelope-from ) id 1iujGQ-000mVT-Rv; Thu, 23 Jan 2020 15:39:42 -0500 Message-Id: <20200123203942.751467858@goodmis.org> User-Agent: quilt/0.65 Date: Thu, 23 Jan 2020 15:39:33 -0500 From: Steven Rostedt To: linux-kernel@vger.kernel.org, linux-rt-users Cc: Thomas Gleixner , Carsten Emde , Sebastian Andrzej Siewior , John Kacur , Julia Cartwright , Daniel Wagner , Tom Zanussi , Juri Lelli Subject: [PATCH RT 03/30] sched/deadline: Ensure inactive_timer runs in hardirq context References: <20200123203930.646725253@goodmis.org> MIME-Version: 1.0 Sender: linux-rt-users-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-rt-users@vger.kernel.org 4.19.94-rt39-rc2 stable review patch. If anyone has any objections, please let me know. ------------------ From: Juri Lelli [ Upstream commit ba94e7aed7405c58251b1380e6e7d73aa8284b41 ] SCHED_DEADLINE inactive timer needs to run in hardirq context (as dl_task_timer already does) on PREEMPT_RT Change the mode to HRTIMER_MODE_REL_HARD. [ tglx: Fixed up the start site, so mode debugging works ] Signed-off-by: Juri Lelli Signed-off-by: Thomas Gleixner Link: https://lkml.kernel.org/r/20190731103715.4047-1-juri.lelli@redhat.com Signed-off-by: Sebastian Andrzej Siewior Signed-off-by: Steven Rostedt (VMware) --- kernel/sched/deadline.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c index 974a8f9b615a..929167a1d991 100644 --- a/kernel/sched/deadline.c +++ b/kernel/sched/deadline.c @@ -287,7 +287,7 @@ static void task_non_contending(struct task_struct *p) dl_se->dl_non_contending = 1; get_task_struct(p); - hrtimer_start(timer, ns_to_ktime(zerolag_time), HRTIMER_MODE_REL); + hrtimer_start(timer, ns_to_ktime(zerolag_time), HRTIMER_MODE_REL_HARD); } static void task_contending(struct sched_dl_entity *dl_se, int flags) @@ -1325,7 +1325,7 @@ void init_dl_inactive_task_timer(struct sched_dl_entity *dl_se) { struct hrtimer *timer = &dl_se->inactive_timer; - hrtimer_init(timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); + hrtimer_init(timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL_HARD); timer->function = inactive_task_timer; }