Messages in this thread Patch in this message | | | From | Frederic Weisbecker <> | Subject | [PATCH 3/4] nohz: Add tick_nohz_full_add_cpus_to() API | Date | Wed, 6 May 2015 18:04:25 +0200 |
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From: Chris Metcalf <cmetcalf@ezchip.com>
This API is useful to modify a cpumask indicating some special nohz-type functionality so that the nohz cores are automatically added to that set.
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Chris Metcalf <cmetcalf@ezchip.com> Cc: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Ingo Molnar <mingo@redhat.com> Link: http://lkml.kernel.org/r/1429024675-18938-1-git-send-email-cmetcalf@ezchip.com Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> --- include/linux/tick.h | 7 +++++++ 1 file changed, 7 insertions(+)
diff --git a/include/linux/tick.h b/include/linux/tick.h index f8492da5..4191b56 100644 --- a/include/linux/tick.h +++ b/include/linux/tick.h @@ -134,6 +134,12 @@ static inline bool tick_nohz_full_cpu(int cpu) return cpumask_test_cpu(cpu, tick_nohz_full_mask); } +static inline void tick_nohz_full_add_cpus_to(struct cpumask *mask) +{ + if (tick_nohz_full_enabled()) + 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); @@ -142,6 +148,7 @@ 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_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) { } -- 2.1.4
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