From: Jean Delvare <jdelvare@suse.de>
To: linux-pm@vger.kernel.org
Cc: Thomas Gleixner <tglx@linutronix.de>,
Zhang Rui <rui.zhang@intel.com>,
"Rafael J. Wysocki" <rjw@rjwysocki.net>,
Daniel Lezcano <daniel.lezcano@linaro.org>
Subject: [PATCH 1/3] Subject: nohz: Expose tick_nohz_enabled
Date: Mon, 11 Jan 2016 17:40:31 +0100 [thread overview]
Message-ID: <20160111174031.6cc73575@endymion.delvare> (raw)
In-Reply-To: <20160111173915.63ec1bcd@endymion.delvare>
The cpuidle subsystem needs it.
Signed-off-by: Jean Delvare <jdelvare@suse.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Zhang Rui <rui.zhang@intel.com>
---
include/linux/tick.h | 2 ++
kernel/time/tick-sched.c | 2 +-
2 files changed, 3 insertions(+), 1 deletion(-)
--- linux-4.4.orig/include/linux/tick.h 2016-01-11 00:01:32.000000000 +0100
+++ linux-4.4/include/linux/tick.h 2016-01-11 15:10:46.334547548 +0100
@@ -98,6 +98,7 @@ static inline void tick_broadcast_exit(v
}
#ifdef CONFIG_NO_HZ_COMMON
+extern int tick_nohz_enabled;
extern int tick_nohz_tick_stopped(void);
extern void tick_nohz_idle_enter(void);
extern void tick_nohz_idle_exit(void);
@@ -106,6 +107,7 @@ extern ktime_t tick_nohz_get_sleep_lengt
extern u64 get_cpu_idle_time_us(int cpu, u64 *last_update_time);
extern u64 get_cpu_iowait_time_us(int cpu, u64 *last_update_time);
#else /* !CONFIG_NO_HZ_COMMON */
+#define tick_nohz_enabled (0)
static inline int tick_nohz_tick_stopped(void) { return 0; }
static inline void tick_nohz_idle_enter(void) { }
static inline void tick_nohz_idle_exit(void) { }
--- linux-4.4.orig/kernel/time/tick-sched.c 2016-01-11 15:06:54.776653477 +0100
+++ linux-4.4/kernel/time/tick-sched.c 2016-01-11 15:09:19.022700899 +0100
@@ -387,7 +387,7 @@ void __init tick_nohz_init(void)
/*
* NO HZ enabled ?
*/
-static int tick_nohz_enabled __read_mostly = 1;
+int tick_nohz_enabled __read_mostly = 1;
unsigned long tick_nohz_active __read_mostly;
/*
* Enable / Disable tickless mode
--
Jean Delvare
SUSE L3 Support
next prev parent reply other threads:[~2016-01-11 16:40 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-01-11 16:39 [PATCH 0/3] Use the ladder cpuidle governor when appropriate Jean Delvare
2016-01-11 16:40 ` Jean Delvare [this message]
2016-01-11 16:44 ` [PATCH 1/3] Subject: nohz: Expose tick_nohz_enabled Jean Delvare
2016-01-11 17:10 ` Thomas Gleixner
2016-01-11 16:41 ` [PATCH 2/3] cpuidle: Default to ladder governor on ticking systems Jean Delvare
2016-01-11 16:43 ` [PATCH 3/3] cpuidle: Don't enable all governors by default Jean Delvare
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