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=-6.9 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 5942AC433E2 for ; Thu, 17 Sep 2020 10:52:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 23FCD2074B for ; Thu, 17 Sep 2020 10:52:54 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="IZVKxfNw"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="hoDZxpIh" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726653AbgIQKwt (ORCPT ); Thu, 17 Sep 2020 06:52:49 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52838 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726718AbgIQKs4 (ORCPT ); Thu, 17 Sep 2020 06:48:56 -0400 Received: from galois.linutronix.de (Galois.linutronix.de [IPv6:2a0a:51c0:0:12e:550::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C6DECC061788 for ; Thu, 17 Sep 2020 03:48:55 -0700 (PDT) Message-Id: <20200917101624.708629719@linutronix.de> DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1600339729; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: references:references; bh=mmv89QXjj7U3XRxgS9HSrVCslkQtfKsfeulro/mY7tE=; b=IZVKxfNwWdfbBCaZhVfLaWL9NHZy+20RDAXpTMcts2DrQV3xMh4K5oW6Xp3D+zPGWwKtRC IXZCjskI/UskmjLIWwfKAskwa1Hsm5PNGxzPNhzHOBdgMX4U0t+6UEXykyyw5j3gYUiH6R gDnKzlsFZfLrPq8DeN3/kQlo9ma+PMqCc2cmST5bA997wf/wLh4McYsJvnrLHRrAnHLxb8 bhKpnjsqv609mbUsdyxMTsXGU7VjSQMc+LuzOxFhM+zMUu6BvldeL1Og7lI+JKi/JFJ/Ew i7GBHaIwEIs4rK0utq09+1Wsr6lQ8dX0NNFy1pFGuU41r5S8qUwh1G1C2U6l5g== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1600339729; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: references:references; bh=mmv89QXjj7U3XRxgS9HSrVCslkQtfKsfeulro/mY7tE=; b=hoDZxpIhRGTQuSkJAhV+24szpe3y9piOcxuV+GeeRtj/qPMJoO6vwIH2KcTB68cXeObPHB px8jd05XXge/lEDQ== Date: Thu, 17 Sep 2020 11:42:10 +0200 From: Thomas Gleixner To: LKML Cc: Sebastian Siewior , Qais Yousef , Scott Wood , "Peter Zijlstra (Intel)" , Valentin Schneider , Ingo Molnar , Peter Zijlstra , Juri Lelli , Vincent Guittot , Dietmar Eggemann , Steven Rostedt , Ben Segall , Mel Gorman , Daniel Bristot de Oliveira , Vincent Donnefort Subject: [patch 08/10] sched: Add update_migratory() callback to scheduler classes References: <20200917094202.301694311@linutronix.de> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-transfer-encoding: 8-bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Provide a mechanism to update the number or migratory tasks in the RT and deadline scheduler classes. This will be used by the upcoming migrate_disable/enable() functionality on RT kernels. Originally-by: Daniel Bristot de Oliveira Signed-off-by: Thomas Gleixner --- kernel/sched/deadline.c | 10 ++++++++++ kernel/sched/rt.c | 10 ++++++++++ kernel/sched/sched.h | 4 ++++ 3 files changed, 24 insertions(+) --- a/kernel/sched/deadline.c +++ b/kernel/sched/deadline.c @@ -479,6 +479,13 @@ static void dec_dl_migration(struct sche update_dl_migration(dl_rq); } +#ifdef CONFIG_PREEMPT_RT +static void update_migratory_dl(struct task_struct *p, long delta) +{ + task_rq(p)->dl.dl_nr_migratory += delta; +} +#endif + /* * The list of pushable -deadline task is not a plist, like in * sched_rt.c, it is an rb-tree with tasks ordered by deadline. @@ -2499,6 +2506,9 @@ const struct sched_class dl_sched_class .rq_online = rq_online_dl, .rq_offline = rq_offline_dl, .task_woken = task_woken_dl, +#ifdef CONFIG_PREEMPT_RT + .update_migratory = update_migratory_dl, +#endif #endif .task_tick = task_tick_dl, --- a/kernel/sched/rt.c +++ b/kernel/sched/rt.c @@ -2272,6 +2272,13 @@ static void switched_from_rt(struct rq * rt_queue_pull_task(rq); } +#ifdef CONFIG_PREEMPT_RT +static void update_migratory_rt(struct task_struct *p, long delta) +{ + task_rq(p)->rt.rt_nr_migratory += delta; +} +#endif + void __init init_sched_rt_class(void) { unsigned int i; @@ -2449,6 +2456,9 @@ const struct sched_class rt_sched_class .rq_offline = rq_offline_rt, .task_woken = task_woken_rt, .switched_from = switched_from_rt, +#ifdef CONFIG_PREEMPT_RT + .update_migratory = update_migratory_rt, +#endif #endif .task_tick = task_tick_rt, --- a/kernel/sched/sched.h +++ b/kernel/sched/sched.h @@ -1808,6 +1808,10 @@ struct sched_class { void (*set_cpus_allowed)(struct task_struct *p, const struct cpumask *newmask); +#ifdef CONFIG_PREEMPT_RT + void (*update_migratory)(struct task_struct *p, long delta); +#endif + void (*rq_online)(struct rq *rq); void (*rq_offline)(struct rq *rq); #endif