From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thomas Gleixner Subject: Re: [PATCH 1/3] Subject: nohz: Expose tick_nohz_enabled Date: Mon, 11 Jan 2016 18:10:39 +0100 (CET) Message-ID: References: <20160111173915.63ec1bcd@endymion.delvare> <20160111174031.6cc73575@endymion.delvare> Mime-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Return-path: Received: from www.linutronix.de ([62.245.132.108]:57275 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934254AbcAKRLi (ORCPT ); Mon, 11 Jan 2016 12:11:38 -0500 In-Reply-To: <20160111174031.6cc73575@endymion.delvare> Sender: linux-pm-owner@vger.kernel.org List-Id: linux-pm@vger.kernel.org To: Jean Delvare Cc: linux-pm@vger.kernel.org, Zhang Rui , "Rafael J. Wysocki" , Daniel Lezcano On Mon, 11 Jan 2016, Jean Delvare wrote: > The cpuidle subsystem needs it. > > Signed-off-by: Jean Delvare > Cc: Thomas Gleixner > Cc: Zhang Rui Reviewed-by: Thomas Gleixner > --- > 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 >