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| author | Ingo Molnar <mingo@kernel.org> | 2017-02-03 11:12:59 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2017-03-03 01:43:43 +0100 |
| commit | 752b3ca734cbc17c0456b846ae886c0ed39c5703 (patch) | |
| tree | d5102243159fe04db42164395c85ecb5d0d5cd06 /include/linux/sched/nohz.h | |
| parent | 3605df49556ebb7641d1f8ec2e7eeecf4dd734bf (diff) | |
| download | lwn-752b3ca734cbc17c0456b846ae886c0ed39c5703.tar.gz lwn-752b3ca734cbc17c0456b846ae886c0ed39c5703.zip | |
sched/headers: Move the NOHZ APIs from <linux/sched.h> to <linux/sched/nohz.h>
There's a number of NOHZ/dyntics related functionality in <linux/sched.h>,
but only a handful of timer files are making use of them.
Move them into their own header. This better documents these APIs
and unclutters <linux/sched.h>.
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'include/linux/sched/nohz.h')
| -rw-r--r-- | include/linux/sched/nohz.h | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/include/linux/sched/nohz.h b/include/linux/sched/nohz.h index fe6caf0dab10..9471f0736a3a 100644 --- a/include/linux/sched/nohz.h +++ b/include/linux/sched/nohz.h @@ -3,4 +3,43 @@ #include <linux/sched.h> +/* + * This is the interface between the scheduler and nohz/dyntics: + */ + +#if defined(CONFIG_SMP) && defined(CONFIG_NO_HZ_COMMON) +extern void cpu_load_update_nohz_start(void); +extern void cpu_load_update_nohz_stop(void); +#else +static inline void cpu_load_update_nohz_start(void) { } +static inline void cpu_load_update_nohz_stop(void) { } +#endif + +#if defined(CONFIG_SMP) && defined(CONFIG_NO_HZ_COMMON) +extern void nohz_balance_enter_idle(int cpu); +extern void set_cpu_sd_state_idle(void); +extern int get_nohz_timer_target(void); +#else +static inline void nohz_balance_enter_idle(int cpu) { } +static inline void set_cpu_sd_state_idle(void) { } +#endif + +#ifdef CONFIG_NO_HZ_COMMON +void calc_load_enter_idle(void); +void calc_load_exit_idle(void); +#else +static inline void calc_load_enter_idle(void) { } +static inline void calc_load_exit_idle(void) { } +#endif /* CONFIG_NO_HZ_COMMON */ + +#if defined(CONFIG_NO_HZ_COMMON) && defined(CONFIG_SMP) +extern void wake_up_nohz_cpu(int cpu); +#else +static inline void wake_up_nohz_cpu(int cpu) { } +#endif + +#ifdef CONFIG_NO_HZ_FULL +extern u64 scheduler_tick_max_deferment(void); +#endif + #endif /* _LINUX_SCHED_NOHZ_H */ |