Commit 83dedea8 authored May 06, 2015 by Chris Metcalf Committed by Ingo Molnar May 07, 2015

nohz: Add tick_nohz_full_add_cpus_to() API



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.

Signed-off-by: Chris Metcalf <cmetcalf@ezchip.com>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Dave Jones <davej@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Mike Galbraith <umgwanakikbuti@gmail.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1429024675-18938-1-git-send-email-cmetcalf@ezchip.com
Link: http://lkml.kernel.org/r/1430928266-24888-4-git-send-email-fweisbec@gmail.com


Signed-off-by: Ingo Molnar <mingo@kernel.org>

parent fafe870f

include/linux/tick.h

+7 −0

Original line number	Diff line number	Diff line
		@@ -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) { }

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