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sched/isolation: Make the housekeeping cpumask private 

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

Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
Acked-by: Thomas 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: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Frederic Weisbecker 2017-10-27 04:42:31 +02:00 committed by Ingo Molnar
parent 9f0ca2d97e
commit 7e56a1cf4b
2 changed files with 45 additions and 22 deletions
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31
include/linux/sched/isolation.h
View File

@ -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 */

36
kernel/sched/isolation.c
View File

@ -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)
{