diff options
| author | Ingo Molnar <[email protected]> | 2014-06-18 18:47:03 +0200 |
|---|---|---|
| committer | Ingo Molnar <[email protected]> | 2014-06-18 18:47:03 +0200 |
| commit | d490b3e2c23369c6adfa183d18d9a24ced247797 (patch) | |
| tree | 3355c2173228ad1986299c84d22d40ce24764390 /include/linux | |
| parent | ebe06187bf2aec10d537ce4595e416035367d703 (diff) | |
| parent | 3882ec643997757824cd5f25180cd8a787b9dbe1 (diff) | |
Merge branch 'timers/nohz-irq-work-v7' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks into timers/nohz
Pull nohz updates from Frederic Weisbecker:
" This set moves the nohz kick, used to notify a full dynticks CPU when
events require tick rescheduling, out of the scheduler tick to a
dedicated IPI.
This debloats a bit the scheduler IPI from off-topic work that was
abusing that scheduler fast path for its convenient asynchronous
properties. Now the nohz kick uses irq-work for its own needs.
Of course this implied quite some background infrastructure rework,
including:
* Clean up some irq-work internals
* Implement remote irq-work
* Implement nohz kick on top of remote irq-work
* Move full dynticks timer enqueue notification to new kick
* Move multi-task notification to new kick
* Remove unecessary barriers on multi-task notification
"
Signed-off-by: Ingo Molnar <[email protected]>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/irq_work.h | 5 | ||||
| -rw-r--r-- | include/linux/tick.h | 9 |
2 files changed, 13 insertions, 1 deletions
diff --git a/include/linux/irq_work.h b/include/linux/irq_work.h index 19ae05d4b8ec..bf9422c3aefe 100644 --- a/include/linux/irq_work.h +++ b/include/linux/irq_work.h @@ -33,6 +33,11 @@ void init_irq_work(struct irq_work *work, void (*func)(struct irq_work *)) #define DEFINE_IRQ_WORK(name, _f) struct irq_work name = { .func = (_f), } bool irq_work_queue(struct irq_work *work); + +#ifdef CONFIG_SMP +bool irq_work_queue_on(struct irq_work *work, int cpu); +#endif + void irq_work_run(void); void irq_work_sync(struct irq_work *work); diff --git a/include/linux/tick.h b/include/linux/tick.h index b84773cb9f4c..8a4987f2294a 100644 --- a/include/linux/tick.h +++ b/include/linux/tick.h @@ -181,7 +181,13 @@ static inline bool tick_nohz_full_cpu(int cpu) extern void tick_nohz_init(void); extern void __tick_nohz_full_check(void); -extern void tick_nohz_full_kick(void); +extern void tick_nohz_full_kick_cpu(int cpu); + +static inline void tick_nohz_full_kick(void) +{ + tick_nohz_full_kick_cpu(smp_processor_id()); +} + extern void tick_nohz_full_kick_all(void); extern void __tick_nohz_task_switch(struct task_struct *tsk); #else @@ -189,6 +195,7 @@ static inline void tick_nohz_init(void) { } static inline bool tick_nohz_full_enabled(void) { return false; } static inline bool tick_nohz_full_cpu(int cpu) { return false; } static inline void __tick_nohz_full_check(void) { } +static inline void tick_nohz_full_kick_cpu(int cpu) { } static inline void tick_nohz_full_kick(void) { } static inline void tick_nohz_full_kick_all(void) { } static inline void __tick_nohz_task_switch(struct task_struct *tsk) { } |