diff options
| author | Frederic Weisbecker <frederic@kernel.org> | 2017-10-27 04:42:28 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2017-10-27 09:55:24 +0200 |
| commit | 7863406143d8bbbbda07a61285c5f4c217908dfd (patch) | |
| tree | 91693d224c4970503ed0ea7636fe774331a265ec /include/linux/sched | |
| parent | 54b933c6c954a8b7b0c2b40a1c4d3f7279d11e22 (diff) | |
sched/isolation: Move housekeeping related code to its own file
The housekeeping code is currently tied to the NOHZ code. As we are
planning to make housekeeping independent from it, start with moving
the relevant code to its own file.
Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
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: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Wanpeng Li <kernellwp@gmail.com>
Link: http://lkml.kernel.org/r/1509072159-31808-2-git-send-email-frederic@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'include/linux/sched')
| -rw-r--r-- | include/linux/sched/isolation.h | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/include/linux/sched/isolation.h b/include/linux/sched/isolation.h new file mode 100644 index 000000000000..b7cfbc46286c --- /dev/null +++ b/include/linux/sched/isolation.h @@ -0,0 +1,56 @@ +#ifndef _LINUX_SCHED_ISOLATION_H +#define _LINUX_SCHED_ISOLATION_H + +#include <linux/cpumask.h> +#include <linux/init.h> +#include <linux/tick.h> + +#ifdef CONFIG_NO_HZ_FULL +extern cpumask_var_t housekeeping_mask; + +static inline int housekeeping_any_cpu(void) +{ + return cpumask_any_and(housekeeping_mask, cpu_online_mask); +} + +extern void __init housekeeping_init(void); + +#else + +static inline int housekeeping_any_cpu(void) +{ + return smp_processor_id(); +} + +static inline void housekeeping_init(void) { } +#endif /* CONFIG_NO_HZ_FULL */ + + +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 bool is_housekeeping_cpu(int cpu) +{ +#ifdef CONFIG_NO_HZ_FULL + if (tick_nohz_full_enabled()) + return cpumask_test_cpu(cpu, housekeeping_mask); +#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 */ |