Messages in this thread Patch in this message | | | From | <> | Subject | [PATCH 3/4] nohz: add tick_nohz_full_clear_cpus() API | Date | Tue, 24 Mar 2015 15:21:34 -0400 |
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From: Chris Metcalf <cmetcalf@ezchip.com>
This is useful, for example, to modify a cpumask to avoid the nohz cores so that interrupts aren't sent to them.
Signed-off-by: Chris Metcalf <cmetcalf@ezchip.com> --- Motivated by patch 4/4 in this series.
include/linux/tick.h | 7 +++++++ 1 file changed, 7 insertions(+)
diff --git a/include/linux/tick.h b/include/linux/tick.h index 9c085dc12ae9..d53ad4892a39 100644 --- a/include/linux/tick.h +++ b/include/linux/tick.h @@ -186,6 +186,12 @@ static inline bool tick_nohz_full_cpu(int cpu) return cpumask_test_cpu(cpu, tick_nohz_full_mask); } +static inline void tick_nohz_full_clear_cpus(struct cpumask *mask) +{ + if (tick_nohz_full_enabled()) + cpumask_andnot(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); @@ -194,6 +200,7 @@ extern void __tick_nohz_task_switch(struct task_struct *tsk); #else 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_clear_cpus(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) { } -- 2.1.2
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