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From: Wang Qing <wangqing@vivo.com>
To: Catalin Marinas <catalin.marinas@arm.com>,
	Will Deacon <will@kernel.org>, Ingo Molnar <mingo@redhat.com>,
	Peter Zijlstra <peterz@infradead.org>,
	Juri Lelli <juri.lelli@redhat.com>,
	Vincent Guittot <vincent.guittot@linaro.org>,
	Dietmar Eggemann <dietmar.eggemann@arm.com>,
	Steven Rostedt <rostedt@goodmis.org>,
	Ben Segall <bsegall@google.com>, Mel Gorman <mgorman@suse.de>,
	James Morse <james.morse@arm.com>,
	Mark Rutland <mark.rutland@arm.com>,
	"Eric W. Biederman" <ebiederm@xmission.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	jinho lim <jordan.lim@samsung.com>, Wang Qing <wangqing@vivo.com>,
	Dave Martin <Dave.Martin@arm.com>,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org
Cc: opensource.kernel@vivo.com
Subject: [PATCH 1/2] [V2 1/2]sched:add task_running_oncpu
Date: Mon, 13 Apr 2020 20:04:23 +0800	[thread overview]
Message-ID: <1586779466-4439-2-git-send-email-wangqing@vivo.com> (raw)
In-Reply-To: <1586779466-4439-1-git-send-email-wangqing@vivo.com>

We have no interface whether the task is running,
so we need to add an interface and distinguish CONFIG_SMP.

Signed-off-by: Wang Qing <wangqing@vivo.com>
---
 include/linux/sched.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/include/linux/sched.h b/include/linux/sched.h
index 4418f5c..13cc8f5 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1843,6 +1843,11 @@ static inline unsigned int task_cpu(const struct task_struct *p)
 
 extern void set_task_cpu(struct task_struct *p, unsigned int cpu);
 
+static inline int task_running_oncpu(const struct task_struct *p)
+{
+	return p->on_cpu;
+}
+
 #else
 
 static inline unsigned int task_cpu(const struct task_struct *p)
@@ -1854,6 +1859,11 @@ static inline void set_task_cpu(struct task_struct *p, unsigned int cpu)
 {
 }
 
+static inline int task_running_oncpu(const struct task_struct *p)
+{
+	return p == current;
+}
+
 #endif /* CONFIG_SMP */
 
 /*
-- 
2.7.4


WARNING: multiple messages have this Message-ID (diff)
From: Wang Qing <wangqing@vivo.com>
To: Catalin Marinas <catalin.marinas@arm.com>,
	Will Deacon <will@kernel.org>, Ingo Molnar <mingo@redhat.com>,
	Peter Zijlstra <peterz@infradead.org>,
	Juri Lelli <juri.lelli@redhat.com>,
	Vincent Guittot <vincent.guittot@linaro.org>,
	Dietmar Eggemann <dietmar.eggemann@arm.com>,
	Steven Rostedt <rostedt@goodmis.org>,
	Ben Segall <bsegall@google.com>, Mel Gorman <mgorman@suse.de>,
	James Morse <james.morse@arm.com>,
	Mark Rutland <mark.rutland@arm.com>,
	"Eric W. Biederman" <ebiederm@xmission.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	jinho lim <jordan.lim@samsung.com>, Wang Qing <wangqing@vivo.com>,
	Dave Martin <Dave.Martin@arm.com>,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org
Cc: opensource.kernel@vivo.com
Subject: [PATCH 1/2] [V2 1/2]sched:add task_running_oncpu
Date: Mon, 13 Apr 2020 20:04:23 +0800	[thread overview]
Message-ID: <1586779466-4439-2-git-send-email-wangqing@vivo.com> (raw)
In-Reply-To: <1586779466-4439-1-git-send-email-wangqing@vivo.com>

We have no interface whether the task is running,
so we need to add an interface and distinguish CONFIG_SMP.

Signed-off-by: Wang Qing <wangqing@vivo.com>
---
 include/linux/sched.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/include/linux/sched.h b/include/linux/sched.h
index 4418f5c..13cc8f5 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1843,6 +1843,11 @@ static inline unsigned int task_cpu(const struct task_struct *p)
 
 extern void set_task_cpu(struct task_struct *p, unsigned int cpu);
 
+static inline int task_running_oncpu(const struct task_struct *p)
+{
+	return p->on_cpu;
+}
+
 #else
 
 static inline unsigned int task_cpu(const struct task_struct *p)
@@ -1854,6 +1859,11 @@ static inline void set_task_cpu(struct task_struct *p, unsigned int cpu)
 {
 }
 
+static inline int task_running_oncpu(const struct task_struct *p)
+{
+	return p == current;
+}
+
 #endif /* CONFIG_SMP */
 
 /*
-- 
2.7.4


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

  reply	other threads:[~2020-04-13 12:05 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-04-13 12:04 [PATCH 0/2] fixed dump_backtrace() when task running on another cpu Wang Qing
2020-04-13 12:04 ` Wang Qing
2020-04-13 12:04 ` Wang Qing [this message]
2020-04-13 12:04   ` [PATCH 1/2] [V2 1/2]sched:add task_running_oncpu Wang Qing
2020-04-14  7:20   ` Vincent Guittot
2020-04-14  7:20     ` Vincent Guittot
2020-04-14 10:05     ` Peter Zijlstra
2020-04-14 10:05       ` Peter Zijlstra
2020-04-14  9:47   ` Wang Qing
2020-04-15  8:34   ` Wang Qing
2020-04-15  8:34     ` Wang Qing
2020-04-13 12:04 ` [PATCH 2/2] [V2 2/2]ARM64:fixed dump_backtrace() when task running on another cpu Wang Qing
2020-04-13 12:04   ` Wang Qing

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