From: Viresh Kumar <viresh.kumar@linaro.org>
To: Rafael Wysocki <rjw@rjwysocki.net>,
Ingo Molnar <mingo@redhat.com>,
Peter Zijlstra <peterz@infradead.org>
Cc: linaro-kernel@lists.linaro.org, linux-pm@vger.kernel.org,
linux-kernel@vger.kernel.org,
Vincent Guittot <vincent.guittot@linaro.org>,
Juri Lelli <Juri.Lelli@arm.com>,
Robin Randhawa <robin.randhawa@arm.com>,
Steve Muckle <smuckle.linux@gmail.com>,
Viresh Kumar <viresh.kumar@linaro.org>
Subject: [PATCH V2 4/4] cpufreq: schedutil: irq-work and mutex are only used in slow path
Date: Tue, 15 Nov 2016 13:53:23 +0530 [thread overview]
Message-ID: <a099804224d5e980a78668fa111e0564b0f44029.1479197311.git.viresh.kumar@linaro.org> (raw)
In-Reply-To: <cover.1479197311.git.viresh.kumar@linaro.org>
In-Reply-To: <cover.1479197311.git.viresh.kumar@linaro.org>
Execute the irq-work specific initialization/exit code only when the
fast path isn't available.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
---
kernel/sched/cpufreq_schedutil.c | 13 ++++++++-----
1 file changed, 8 insertions(+), 5 deletions(-)
diff --git a/kernel/sched/cpufreq_schedutil.c b/kernel/sched/cpufreq_schedutil.c
index f165ba0f0766..42a220e78f00 100644
--- a/kernel/sched/cpufreq_schedutil.c
+++ b/kernel/sched/cpufreq_schedutil.c
@@ -390,15 +390,12 @@ static struct sugov_policy *sugov_policy_alloc(struct cpufreq_policy *policy)
return NULL;
sg_policy->policy = policy;
- init_irq_work(&sg_policy->irq_work, sugov_irq_work);
- mutex_init(&sg_policy->work_lock);
raw_spin_lock_init(&sg_policy->update_lock);
return sg_policy;
}
static void sugov_policy_free(struct sugov_policy *sg_policy)
{
- mutex_destroy(&sg_policy->work_lock);
kfree(sg_policy);
}
@@ -432,6 +429,9 @@ static int sugov_kthread_create(struct sugov_policy *sg_policy)
sg_policy->thread = thread;
kthread_bind_mask(thread, policy->related_cpus);
+ init_irq_work(&sg_policy->irq_work, sugov_irq_work);
+ mutex_init(&sg_policy->work_lock);
+
wake_up_process(thread);
return 0;
@@ -445,6 +445,7 @@ static void sugov_kthread_stop(struct sugov_policy *sg_policy)
kthread_flush_worker(&sg_policy->worker);
kthread_stop(sg_policy->thread);
+ mutex_destroy(&sg_policy->work_lock);
}
static struct sugov_tunables *sugov_tunables_alloc(struct sugov_policy *sg_policy)
@@ -611,8 +612,10 @@ static void sugov_stop(struct cpufreq_policy *policy)
synchronize_sched();
- irq_work_sync(&sg_policy->irq_work);
- kthread_cancel_work_sync(&sg_policy->work);
+ if (!policy->fast_switch_enabled) {
+ irq_work_sync(&sg_policy->irq_work);
+ kthread_cancel_work_sync(&sg_policy->work);
+ }
}
static void sugov_limits(struct cpufreq_policy *policy)
--
2.7.1.410.g6faf27b
next prev parent reply other threads:[~2016-11-15 8:24 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-11-15 8:23 [PATCH V2 0/4] cpufreq: schedutil: move slow path from workqueue to SCHED_FIFO task Viresh Kumar
2016-11-15 8:23 ` [PATCH V2 1/4] cpufreq: schedutil: Avoid indented labels Viresh Kumar
2016-11-15 8:23 ` [PATCH V2 2/4] cpufreq: schedutil: enable fast switch earlier Viresh Kumar
2016-11-15 8:23 ` [PATCH V2 3/4] cpufreq: schedutil: move slow path from workqueue to SCHED_FIFO task Viresh Kumar
2016-11-16 15:26 ` Peter Zijlstra
2016-11-24 1:19 ` Rafael J. Wysocki
2016-11-24 4:51 ` Ingo Molnar
2016-11-24 5:10 ` Viresh Kumar
2016-11-15 8:23 ` Viresh Kumar [this message]
2016-11-24 4:53 ` [PATCH V2 4/4] cpufreq: schedutil: irq-work and mutex are only used in slow path Ingo Molnar
2016-11-24 6:12 ` Viresh Kumar
2016-11-24 6:24 ` Ingo Molnar
2016-11-24 3:01 ` [PATCH V2 0/4] cpufreq: schedutil: move slow path from workqueue to SCHED_FIFO task Steve Muckle
2016-11-24 4:04 ` Viresh Kumar
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