From patchwork Thu Sep 24 12:39:35 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ionela Voinescu X-Patchwork-Id: 11797201 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 41E0259D for ; Thu, 24 Sep 2020 12:40:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 30873221EB for ; Thu, 24 Sep 2020 12:40:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727693AbgIXMkO (ORCPT ); Thu, 24 Sep 2020 08:40:14 -0400 Received: from foss.arm.com ([217.140.110.172]:45040 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727570AbgIXMkO (ORCPT ); Thu, 24 Sep 2020 08:40:14 -0400 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id CC896113E; Thu, 24 Sep 2020 05:40:13 -0700 (PDT) Received: from e108754-lin.cambridge.arm.com (unknown [10.1.199.49]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 0C0253F73B; Thu, 24 Sep 2020 05:40:11 -0700 (PDT) From: Ionela Voinescu To: mingo@redhat.com, peterz@infradead.org, vincent.guittot@linaro.org, catalin.marinas@arm.com, will@kernel.org, rjw@rjwysocki.net, viresh.kumar@linaro.org Cc: dietmar.eggemann@arm.com, qperret@google.com, valentin.schneider@arm.com, linux-pm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, ionela.voinescu@arm.com Subject: [PATCH 1/3] sched/topology,schedutil: wrap sched domains rebuild Date: Thu, 24 Sep 2020 13:39:35 +0100 Message-Id: <20200924123937.20938-2-ionela.voinescu@arm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200924123937.20938-1-ionela.voinescu@arm.com> References: <20200924123937.20938-1-ionela.voinescu@arm.com> Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org Add the rebuild_sched_domains_energy() function to wrap the functionality that rebuilds the scheduling domains if any of the Energy Aware Scheduling (EAS) initialisation conditions change. This functionality is used when schedutil is added or removed or when EAS is enabled or disabled through the sched_energy_aware sysctl. Therefore, create a single function that is used in both these cases and that can be later reused. Signed-off-by: Ionela Voinescu Cc: Ingo Molnar Cc: Peter Zijlstra Cc: Rafael J. Wysocki Cc: Viresh Kumar Acked-by: Quentin Perret --- include/linux/sched/topology.h | 1 + kernel/sched/cpufreq_schedutil.c | 9 +-------- kernel/sched/topology.c | 19 ++++++++++++------- 3 files changed, 14 insertions(+), 15 deletions(-) diff --git a/include/linux/sched/topology.h b/include/linux/sched/topology.h index 9ef7bf686a9f..f122115d6c54 100644 --- a/include/linux/sched/topology.h +++ b/include/linux/sched/topology.h @@ -158,6 +158,7 @@ static inline struct cpumask *sched_domain_span(struct sched_domain *sd) return to_cpumask(sd->span); } +extern void rebuild_sched_domains_energy(void); extern void partition_sched_domains_locked(int ndoms_new, cpumask_var_t doms_new[], struct sched_domain_attr *dattr_new); diff --git a/kernel/sched/cpufreq_schedutil.c b/kernel/sched/cpufreq_schedutil.c index e39008242cf4..0337a9b025e1 100644 --- a/kernel/sched/cpufreq_schedutil.c +++ b/kernel/sched/cpufreq_schedutil.c @@ -912,16 +912,9 @@ struct cpufreq_governor *cpufreq_default_governor(void) cpufreq_governor_init(schedutil_gov); #ifdef CONFIG_ENERGY_MODEL -extern bool sched_energy_update; -extern struct mutex sched_energy_mutex; - static void rebuild_sd_workfn(struct work_struct *work) { - mutex_lock(&sched_energy_mutex); - sched_energy_update = true; - rebuild_sched_domains(); - sched_energy_update = false; - mutex_unlock(&sched_energy_mutex); + rebuild_sched_domains_energy(); } static DECLARE_WORK(rebuild_sd_work, rebuild_sd_workfn); diff --git a/kernel/sched/topology.c b/kernel/sched/topology.c index 55c453d140e9..4073f693e2b5 100644 --- a/kernel/sched/topology.c +++ b/kernel/sched/topology.c @@ -211,6 +211,15 @@ unsigned int sysctl_sched_energy_aware = 1; DEFINE_MUTEX(sched_energy_mutex); bool sched_energy_update; +void rebuild_sched_domains_energy(void) +{ + mutex_lock(&sched_energy_mutex); + sched_energy_update = true; + rebuild_sched_domains(); + sched_energy_update = false; + mutex_unlock(&sched_energy_mutex); +} + #ifdef CONFIG_PROC_SYSCTL int sched_energy_aware_handler(struct ctl_table *table, int write, void *buffer, size_t *lenp, loff_t *ppos) @@ -223,13 +232,8 @@ int sched_energy_aware_handler(struct ctl_table *table, int write, ret = proc_dointvec_minmax(table, write, buffer, lenp, ppos); if (!ret && write) { state = static_branch_unlikely(&sched_energy_present); - if (state != sysctl_sched_energy_aware) { - mutex_lock(&sched_energy_mutex); - sched_energy_update = 1; - rebuild_sched_domains(); - sched_energy_update = 0; - mutex_unlock(&sched_energy_mutex); - } + if (state != sysctl_sched_energy_aware) + rebuild_sched_domains_energy(); } return ret; @@ -433,6 +437,7 @@ static bool build_perf_domains(const struct cpumask *cpu_map) } #else static void free_pd(struct perf_domain *pd) { } +void rebuild_sched_domains_energy(void) { } #endif /* CONFIG_ENERGY_MODEL && CONFIG_CPU_FREQ_GOV_SCHEDUTIL*/ static void free_rootdomain(struct rcu_head *rcu)