diff options
Diffstat (limited to 'kernel/sched/sched.h')
| -rw-r--r-- | kernel/sched/sched.h | 354 |
1 files changed, 165 insertions, 189 deletions
diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h index de53be905739..58263f90c559 100644 --- a/kernel/sched/sched.h +++ b/kernel/sched/sched.h @@ -2,86 +2,98 @@ /* * Scheduler internal types and methods: */ -#include <linux/sched.h> +#ifndef _KERNEL_SCHED_SCHED_H +#define _KERNEL_SCHED_SCHED_H +#include <linux/sched/affinity.h> #include <linux/sched/autogroup.h> -#include <linux/sched/clock.h> -#include <linux/sched/coredump.h> #include <linux/sched/cpufreq.h> -#include <linux/sched/cputime.h> #include <linux/sched/deadline.h> -#include <linux/sched/debug.h> -#include <linux/sched/hotplug.h> -#include <linux/sched/idle.h> -#include <linux/sched/init.h> -#include <linux/sched/isolation.h> -#include <linux/sched/jobctl.h> +#include <linux/sched.h> #include <linux/sched/loadavg.h> #include <linux/sched/mm.h> -#include <linux/sched/nohz.h> -#include <linux/sched/numa_balancing.h> -#include <linux/sched/prio.h> -#include <linux/sched/rt.h> +#include <linux/sched/rseq_api.h> #include <linux/sched/signal.h> #include <linux/sched/smt.h> #include <linux/sched/stat.h> #include <linux/sched/sysctl.h> +#include <linux/sched/task_flags.h> #include <linux/sched/task.h> -#include <linux/sched/task_stack.h> #include <linux/sched/topology.h> -#include <linux/sched/user.h> -#include <linux/sched/wake_q.h> -#include <linux/sched/xacct.h> -#include <uapi/linux/sched/types.h> - -#include <linux/binfmts.h> -#include <linux/bitops.h> -#include <linux/compat.h> -#include <linux/context_tracking.h> +#include <linux/atomic.h> +#include <linux/bitmap.h> +#include <linux/bug.h> +#include <linux/capability.h> +#include <linux/cgroup_api.h> +#include <linux/cgroup.h> #include <linux/cpufreq.h> -#include <linux/cpuidle.h> -#include <linux/cpuset.h> +#include <linux/cpumask_api.h> #include <linux/ctype.h> -#include <linux/debugfs.h> -#include <linux/delayacct.h> -#include <linux/energy_model.h> -#include <linux/init_task.h> -#include <linux/kprobes.h> +#include <linux/file.h> +#include <linux/fs_api.h> +#include <linux/hrtimer_api.h> +#include <linux/interrupt.h> +#include <linux/irq_work.h> +#include <linux/jiffies.h> +#include <linux/kref_api.h> #include <linux/kthread.h> -#include <linux/membarrier.h> -#include <linux/migrate.h> -#include <linux/mmu_context.h> -#include <linux/nmi.h> +#include <linux/ktime_api.h> +#include <linux/lockdep_api.h> +#include <linux/lockdep.h> +#include <linux/minmax.h> +#include <linux/mm.h> +#include <linux/module.h> +#include <linux/mutex_api.h> +#include <linux/plist.h> +#include <linux/poll.h> #include <linux/proc_fs.h> -#include <linux/prefetch.h> #include <linux/profile.h> #include <linux/psi.h> -#include <linux/ratelimit.h> -#include <linux/rcupdate_wait.h> -#include <linux/security.h> +#include <linux/rcupdate.h> +#include <linux/seq_file.h> +#include <linux/seqlock.h> +#include <linux/softirq.h> +#include <linux/spinlock_api.h> +#include <linux/static_key.h> #include <linux/stop_machine.h> -#include <linux/suspend.h> -#include <linux/swait.h> +#include <linux/syscalls_api.h> #include <linux/syscalls.h> -#include <linux/task_work.h> -#include <linux/tsacct_kern.h> +#include <linux/tick.h> +#include <linux/topology.h> +#include <linux/types.h> +#include <linux/u64_stats_sync_api.h> +#include <linux/uaccess.h> +#include <linux/wait_api.h> +#include <linux/wait_bit.h> +#include <linux/workqueue_api.h> + +#include <trace/events/power.h> +#include <trace/events/sched.h> + +#include "../workqueue_internal.h" + +#ifdef CONFIG_CGROUP_SCHED +#include <linux/cgroup.h> +#include <linux/psi.h> +#endif -#include <asm/tlb.h> +#ifdef CONFIG_SCHED_DEBUG +# include <linux/static_key.h> +#endif #ifdef CONFIG_PARAVIRT # include <asm/paravirt.h> +# include <asm/paravirt_api_clock.h> #endif #include "cpupri.h" #include "cpudeadline.h" -#include <trace/events/sched.h> - #ifdef CONFIG_SCHED_DEBUG -# define SCHED_WARN_ON(x) WARN_ONCE(x, #x) +# define SCHED_WARN_ON(x) WARN_ONCE(x, #x) #else -# define SCHED_WARN_ON(x) ({ (void)(x), 0; }) +# define SCHED_WARN_ON(x) ({ (void)(x), 0; }) #endif struct rq; @@ -301,29 +313,6 @@ struct dl_bw { u64 total_bw; }; -static inline void __dl_update(struct dl_bw *dl_b, s64 bw); - -static inline -void __dl_sub(struct dl_bw *dl_b, u64 tsk_bw, int cpus) -{ - dl_b->total_bw -= tsk_bw; - __dl_update(dl_b, (s32)tsk_bw / cpus); -} - -static inline -void __dl_add(struct dl_bw *dl_b, u64 tsk_bw, int cpus) -{ - dl_b->total_bw += tsk_bw; - __dl_update(dl_b, -((s32)tsk_bw / cpus)); -} - -static inline bool __dl_overflow(struct dl_bw *dl_b, unsigned long cap, - u64 old_bw, u64 new_bw) -{ - return dl_b->bw != -1 && - cap_scale(dl_b->bw, cap) < dl_b->total_bw - old_bw + new_bw; -} - /* * Verify the fitness of task @p to run on @cpu taking into account the * CPU original capacity and the runtime/deadline ratio of the task. @@ -347,15 +336,11 @@ extern void __setparam_dl(struct task_struct *p, const struct sched_attr *attr); extern void __getparam_dl(struct task_struct *p, struct sched_attr *attr); extern bool __checkparam_dl(const struct sched_attr *attr); extern bool dl_param_changed(struct task_struct *p, const struct sched_attr *attr); -extern int dl_task_can_attach(struct task_struct *p, const struct cpumask *cs_cpus_allowed); extern int dl_cpuset_cpumask_can_shrink(const struct cpumask *cur, const struct cpumask *trial); -extern bool dl_cpu_busy(unsigned int cpu); +extern int dl_cpu_busy(int cpu, struct task_struct *p); #ifdef CONFIG_CGROUP_SCHED -#include <linux/cgroup.h> -#include <linux/psi.h> - struct cfs_rq; struct rt_rq; @@ -1662,12 +1647,14 @@ enum numa_topology_type { extern enum numa_topology_type sched_numa_topology_type; extern int sched_max_numa_distance; extern bool find_numa_distance(int distance); -extern void sched_init_numa(void); +extern void sched_init_numa(int offline_node); +extern void sched_update_numa(int cpu, bool online); extern void sched_domains_numa_masks_set(unsigned int cpu); extern void sched_domains_numa_masks_clear(unsigned int cpu); extern int sched_numa_find_closest(const struct cpumask *cpus, int cpu); #else -static inline void sched_init_numa(void) { } +static inline void sched_init_numa(int offline_node) { } +static inline void sched_update_numa(int cpu, bool online) { } static inline void sched_domains_numa_masks_set(unsigned int cpu) { } static inline void sched_domains_numa_masks_clear(unsigned int cpu) { } static inline int sched_numa_find_closest(const struct cpumask *cpus, int cpu) @@ -1854,7 +1841,6 @@ static inline void flush_smp_call_function_from_idle(void) { } #endif #include "stats.h" -#include "autogroup.h" #if defined(CONFIG_SCHED_CORE) && defined(CONFIG_SCHEDSTATS) @@ -1950,7 +1936,6 @@ static inline void __set_task_cpu(struct task_struct *p, unsigned int cpu) * Tunables that become constants when CONFIG_SCHED_DEBUG is off: */ #ifdef CONFIG_SCHED_DEBUG -# include <linux/static_key.h> # define const_debug __read_mostly #else # define const_debug const @@ -2331,7 +2316,6 @@ extern void resched_cpu(int cpu); extern struct rt_bandwidth def_rt_bandwidth; extern void init_rt_bandwidth(struct rt_bandwidth *rt_b, u64 period, u64 runtime); -extern struct dl_bandwidth def_dl_bandwidth; extern void init_dl_bandwidth(struct dl_bandwidth *dl_b, u64 period, u64 runtime); extern void init_dl_task_timer(struct sched_dl_entity *dl_se); extern void init_dl_inactive_task_timer(struct sched_dl_entity *dl_se); @@ -2747,32 +2731,6 @@ extern void nohz_run_idle_balance(int cpu); static inline void nohz_run_idle_balance(int cpu) { } #endif -#ifdef CONFIG_SMP -static inline -void __dl_update(struct dl_bw *dl_b, s64 bw) -{ - struct root_domain *rd = container_of(dl_b, struct root_domain, dl_bw); - int i; - - RCU_LOCKDEP_WARN(!rcu_read_lock_sched_held(), - "sched RCU must be held"); - for_each_cpu_and(i, rd->span, cpu_active_mask) { - struct rq *rq = cpu_rq(i); - - rq->dl.extra_bw += bw; - } -} -#else -static inline -void __dl_update(struct dl_bw *dl_b, s64 bw) -{ - struct dl_rq *dl = container_of(dl_b, struct dl_rq, dl_bw); - - dl->extra_bw += bw; -} -#endif - - #ifdef CONFIG_IRQ_TIME_ACCOUNTING struct irqtime { u64 total; @@ -2841,88 +2799,6 @@ static inline void cpufreq_update_util(struct rq *rq, unsigned int flags) static inline void cpufreq_update_util(struct rq *rq, unsigned int flags) {} #endif /* CONFIG_CPU_FREQ */ -#ifdef CONFIG_UCLAMP_TASK -unsigned long uclamp_eff_value(struct task_struct *p, enum uclamp_id clamp_id); - -/** - * uclamp_rq_util_with - clamp @util with @rq and @p effective uclamp values. - * @rq: The rq to clamp against. Must not be NULL. - * @util: The util value to clamp. - * @p: The task to clamp against. Can be NULL if you want to clamp - * against @rq only. - * - * Clamps the passed @util to the max(@rq, @p) effective uclamp values. - * - * If sched_uclamp_used static key is disabled, then just return the util - * without any clamping since uclamp aggregation at the rq level in the fast - * path is disabled, rendering this operation a NOP. - * - * Use uclamp_eff_value() if you don't care about uclamp values at rq level. It - * will return the correct effective uclamp value of the task even if the - * static key is disabled. - */ -static __always_inline -unsigned long uclamp_rq_util_with(struct rq *rq, unsigned long util, - struct task_struct *p) -{ - unsigned long min_util = 0; - unsigned long max_util = 0; - - if (!static_branch_likely(&sched_uclamp_used)) - return util; - - if (p) { - min_util = uclamp_eff_value(p, UCLAMP_MIN); - max_util = uclamp_eff_value(p, UCLAMP_MAX); - - /* - * Ignore last runnable task's max clamp, as this task will - * reset it. Similarly, no need to read the rq's min clamp. - */ - if (rq->uclamp_flags & UCLAMP_FLAG_IDLE) - goto out; - } - - min_util = max_t(unsigned long, min_util, READ_ONCE(rq->uclamp[UCLAMP_MIN].value)); - max_util = max_t(unsigned long, max_util, READ_ONCE(rq->uclamp[UCLAMP_MAX].value)); -out: - /* - * Since CPU's {min,max}_util clamps are MAX aggregated considering - * RUNNABLE tasks with _different_ clamps, we can end up with an - * inversion. Fix it now when the clamps are applied. - */ - if (unlikely(min_util >= max_util)) - return min_util; - - return clamp(util, min_util, max_util); -} - -/* - * When uclamp is compiled in, the aggregation at rq level is 'turned off' - * by default in the fast path and only gets turned on once userspace performs - * an operation that requires it. - * - * Returns true if userspace opted-in to use uclamp and aggregation at rq level - * hence is active. - */ -static inline bool uclamp_is_used(void) -{ - return static_branch_likely(&sched_uclamp_used); -} -#else /* CONFIG_UCLAMP_TASK */ -static inline -unsigned long uclamp_rq_util_with(struct rq *rq, unsigned long util, - struct task_struct *p) -{ - return util; -} - -static inline bool uclamp_is_used(void) -{ - return false; -} -#endif /* CONFIG_UCLAMP_TASK */ - #ifdef arch_scale_freq_capacity # ifndef arch_scale_freq_invariant # define arch_scale_freq_invariant() true @@ -3020,6 +2896,105 @@ static inline unsigned long cpu_util_rt(struct rq *rq) } #endif +#ifdef CONFIG_UCLAMP_TASK +unsigned long uclamp_eff_value(struct task_struct *p, enum uclamp_id clamp_id); + +/** + * uclamp_rq_util_with - clamp @util with @rq and @p effective uclamp values. + * @rq: The rq to clamp against. Must not be NULL. + * @util: The util value to clamp. + * @p: The task to clamp against. Can be NULL if you want to clamp + * against @rq only. + * + * Clamps the passed @util to the max(@rq, @p) effective uclamp values. + * + * If sched_uclamp_used static key is disabled, then just return the util + * without any clamping since uclamp aggregation at the rq level in the fast + * path is disabled, rendering this operation a NOP. + * + * Use uclamp_eff_value() if you don't care about uclamp values at rq level. It + * will return the correct effective uclamp value of the task even if the + * static key is disabled. + */ +static __always_inline +unsigned long uclamp_rq_util_with(struct rq *rq, unsigned long util, + struct task_struct *p) +{ + unsigned long min_util = 0; + unsigned long max_util = 0; + + if (!static_branch_likely(&sched_uclamp_used)) + return util; + + if (p) { + min_util = uclamp_eff_value(p, UCLAMP_MIN); + max_util = uclamp_eff_value(p, UCLAMP_MAX); + + /* + * Ignore last runnable task's max clamp, as this task will + * reset it. Similarly, no need to read the rq's min clamp. + */ + if (rq->uclamp_flags & UCLAMP_FLAG_IDLE) + goto out; + } + + min_util = max_t(unsigned long, min_util, READ_ONCE(rq->uclamp[UCLAMP_MIN].value)); + max_util = max_t(unsigned long, max_util, READ_ONCE(rq->uclamp[UCLAMP_MAX].value)); +out: + /* + * Since CPU's {min,max}_util clamps are MAX aggregated considering + * RUNNABLE tasks with _different_ clamps, we can end up with an + * inversion. Fix it now when the clamps are applied. + */ + if (unlikely(min_util >= max_util)) + return min_util; + + return clamp(util, min_util, max_util); +} + +/* Is the rq being capped/throttled by uclamp_max? */ +static inline bool uclamp_rq_is_capped(struct rq *rq) +{ + unsigned long rq_util; + unsigned long max_util; + + if (!static_branch_likely(&sched_uclamp_used)) + return false; + + rq_util = cpu_util_cfs(cpu_of(rq)) + cpu_util_rt(rq); + max_util = READ_ONCE(rq->uclamp[UCLAMP_MAX].value); + + return max_util != SCHED_CAPACITY_SCALE && rq_util >= max_util; +} + +/* + * When uclamp is compiled in, the aggregation at rq level is 'turned off' + * by default in the fast path and only gets turned on once userspace performs + * an operation that requires it. + * + * Returns true if userspace opted-in to use uclamp and aggregation at rq level + * hence is active. + */ +static inline bool uclamp_is_used(void) +{ + return static_branch_likely(&sched_uclamp_used); +} +#else /* CONFIG_UCLAMP_TASK */ +static inline +unsigned long uclamp_rq_util_with(struct rq *rq, unsigned long util, + struct task_struct *p) +{ + return util; +} + +static inline bool uclamp_rq_is_capped(struct rq *rq) { return false; } + +static inline bool uclamp_is_used(void) +{ + return false; +} +#endif /* CONFIG_UCLAMP_TASK */ + #ifdef CONFIG_HAVE_SCHED_AVG_IRQ static inline unsigned long cpu_util_irq(struct rq *rq) { @@ -3118,3 +3093,4 @@ extern int sched_dynamic_mode(const char *str); extern void sched_dynamic_update(int mode); #endif +#endif /* _KERNEL_SCHED_SCHED_H */ |