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Commit 7e56a1cf authored by Frederic Weisbecker's avatar Frederic Weisbecker Committed by Ingo Molnar
Browse files

sched/isolation: Make the housekeeping cpumask private 



Nobody needs to access this detail. housekeeping_cpumask() already
takes care of it.

Signed-off-by: default avatarFrederic Weisbecker <frederic@kernel.org>
Acked-by: default avatarThomas Gleixner <tglx@linutronix.de>
Cc: Chris Metcalf <cmetcalf@mellanox.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Luiz Capitulino <lcapitulino@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Wanpeng Li <kernellwp@gmail.com>
Link: http://lkml.kernel.org/r/1509072159-31808-5-git-send-email-frederic@kernel.org


Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
parent 9f0ca2d9

include/linux/sched/isolation.h

+10 −21
Original line number Diff line number Diff line
@@ -6,46 +6,35 @@ 
#include <linux/tick.h>



#ifdef CONFIG_NO_HZ_FULL

extern cpumask_var_t housekeeping_mask;

extern int housekeeping_any_cpu(void);

extern const struct cpumask *housekeeping_cpumask(void);

extern void housekeeping_affine(struct task_struct *t);

extern bool housekeeping_test_cpu(int cpu);

extern void __init housekeeping_init(void);



#else

static inline void housekeeping_init(void) { }

#endif /* CONFIG_NO_HZ_FULL */



static inline int housekeeping_any_cpu(void)

{

#ifdef CONFIG_NO_HZ_FULL

	if (tick_nohz_full_enabled())

		return cpumask_any_and(housekeeping_mask, cpu_online_mask);

#endif

	return smp_processor_id();

}



static inline const struct cpumask *housekeeping_cpumask(void)

{

#ifdef CONFIG_NO_HZ_FULL

	if (tick_nohz_full_enabled())

		return housekeeping_mask;

#endif

	return cpu_possible_mask;

}



static inline void housekeeping_affine(struct task_struct *t) { }

static inline void housekeeping_init(void) { }

#endif /* CONFIG_NO_HZ_FULL */



static inline bool is_housekeeping_cpu(int cpu)

{

#ifdef CONFIG_NO_HZ_FULL

	if (tick_nohz_full_enabled())

		return cpumask_test_cpu(cpu, housekeeping_mask);

		return housekeeping_test_cpu(cpu);

#endif

	return true;

}



static inline void housekeeping_affine(struct task_struct *t)

{

#ifdef CONFIG_NO_HZ_FULL

	if (tick_nohz_full_enabled())

		set_cpus_allowed_ptr(t, housekeeping_mask);



#endif

}



#endif /* _LINUX_SCHED_ISOLATION_H */

kernel/sched/isolation.c

+35 −1
Original line number Diff line number Diff line
@@ -11,7 +11,41 @@ 
#include <linux/init.h>

#include <linux/kernel.h>



cpumask_var_t housekeeping_mask;

static cpumask_var_t housekeeping_mask;



int housekeeping_any_cpu(void)

{

	if (tick_nohz_full_enabled())

		return cpumask_any_and(housekeeping_mask, cpu_online_mask);



	return smp_processor_id();

}

EXPORT_SYMBOL_GPL(housekeeping_any_cpu);



const struct cpumask *housekeeping_cpumask(void)

{

	if (tick_nohz_full_enabled())

		return housekeeping_mask;



	return cpu_possible_mask;

}

EXPORT_SYMBOL_GPL(housekeeping_cpumask);



void housekeeping_affine(struct task_struct *t)

{

	if (tick_nohz_full_enabled())

		set_cpus_allowed_ptr(t, housekeeping_mask);

}

EXPORT_SYMBOL_GPL(housekeeping_affine);



bool housekeeping_test_cpu(int cpu)

{

	if (tick_nohz_full_enabled())

		return cpumask_test_cpu(cpu, housekeeping_mask);



	return true;

}

EXPORT_SYMBOL_GPL(housekeeping_test_cpu);



void __init housekeeping_init(void)

{