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| author | Frederic Weisbecker <fweisbec@gmail.com> | 2015-05-27 20:22:08 +0300 |
|---|---|---|
| committer | Frederic Weisbecker <fweisbec@gmail.com> | 2015-07-29 16:45:00 +0300 |
| commit | 73738a95d00467812664b7f86ba3052f5faf96d7 (patch) | |
| tree | 9827c57a6391c154fa87e4d103672e5888c7fa71 /include/linux/tick.h | |
| parent | 594493594373862ed2a7f91d88a5a2670742faa6 (diff) | |
| download | linux-73738a95d00467812664b7f86ba3052f5faf96d7.tar.xz | |
nohz: Restart nohz full tick from irq exit
Restart the tick when necessary from the irq exit path. It makes nohz
full more flexible, simplify the related IPIs and doesn't bring
significant overhead on irq exit.
In a longer term view, it will allow us to piggyback the nohz kick
on the scheduler IPI in the future instead of sending a dedicated IPI
that often doubles the scheduler IPI on task wakeup. This will require
more changes though including careful review of resched_curr() callers
to include nohz full needs.
Reviewed-by: Rik van Riel <riel@redhat.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Preeti U Murthy <preeti@linux.vnet.ibm.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Diffstat (limited to 'include/linux/tick.h')
| -rw-r--r-- | include/linux/tick.h | 8 |
1 files changed, 0 insertions, 8 deletions
diff --git a/include/linux/tick.h b/include/linux/tick.h index 1ca93f2de6f5..7d35b0fec399 100644 --- a/include/linux/tick.h +++ b/include/linux/tick.h @@ -147,7 +147,6 @@ static inline void tick_nohz_full_add_cpus_to(struct cpumask *mask) cpumask_or(mask, mask, tick_nohz_full_mask); } -extern void __tick_nohz_full_check(void); extern void tick_nohz_full_kick(void); extern void tick_nohz_full_kick_cpu(int cpu); extern void tick_nohz_full_kick_all(void); @@ -156,7 +155,6 @@ extern void __tick_nohz_task_switch(struct task_struct *tsk); 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_add_cpus_to(struct cpumask *mask) { } -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) { } @@ -190,12 +188,6 @@ static inline void housekeeping_affine(struct task_struct *t) #endif } -static inline void tick_nohz_full_check(void) -{ - if (tick_nohz_full_enabled()) - __tick_nohz_full_check(); -} - static inline void tick_nohz_task_switch(struct task_struct *tsk) { if (tick_nohz_full_enabled()) |