#include <linux/tick.h>
#ifdef CONFIG_NO_HZ_FULL
+DECLARE_STATIC_KEY_FALSE(housekeeping_overriden);
extern int housekeeping_any_cpu(void);
extern const struct cpumask *housekeeping_cpumask(void);
extern void housekeeping_affine(struct task_struct *t);
static inline bool is_housekeeping_cpu(int cpu)
{
#ifdef CONFIG_NO_HZ_FULL
- if (tick_nohz_full_enabled())
+ if (static_branch_unlikely(&housekeeping_overriden))
return housekeeping_test_cpu(cpu);
#endif
return true;
#include <linux/tick.h>
#include <linux/init.h>
#include <linux/kernel.h>
+#include <linux/static_key.h>
+DEFINE_STATIC_KEY_FALSE(housekeeping_overriden);
+EXPORT_SYMBOL_GPL(housekeeping_overriden);
static cpumask_var_t housekeeping_mask;
int housekeeping_any_cpu(void)
{
- if (tick_nohz_full_enabled())
+ if (static_branch_unlikely(&housekeeping_overriden))
return cpumask_any_and(housekeeping_mask, cpu_online_mask);
return smp_processor_id();
const struct cpumask *housekeeping_cpumask(void)
{
- if (tick_nohz_full_enabled())
+ if (static_branch_unlikely(&housekeeping_overriden))
return housekeeping_mask;
return cpu_possible_mask;
void housekeeping_affine(struct task_struct *t)
{
- if (tick_nohz_full_enabled())
+ if (static_branch_unlikely(&housekeeping_overriden))
set_cpus_allowed_ptr(t, housekeeping_mask);
}
EXPORT_SYMBOL_GPL(housekeeping_affine);
bool housekeeping_test_cpu(int cpu)
{
- if (tick_nohz_full_enabled())
+ if (static_branch_unlikely(&housekeeping_overriden))
return cpumask_test_cpu(cpu, housekeeping_mask);
return true;
cpumask_andnot(housekeeping_mask,
cpu_possible_mask, tick_nohz_full_mask);
+ static_branch_enable(&housekeeping_overriden);
+
/* We need at least one CPU to handle housekeeping work */
WARN_ON_ONCE(cpumask_empty(housekeeping_mask));
}