diff options
Diffstat (limited to 'include/linux/sched.h')
| -rw-r--r-- | include/linux/sched.h | 81 |
1 files changed, 60 insertions, 21 deletions
diff --git a/include/linux/sched.h b/include/linux/sched.h index 0dd42a02df2..2c2f3072bee 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -107,8 +107,18 @@ extern unsigned long this_cpu_load(void); extern void calc_global_load(unsigned long ticks); extern void update_cpu_load_nohz(void); +/* Notifier for when a task gets migrated to a new CPU */ +struct task_migration_notifier { + struct task_struct *task; + int from_cpu; + int to_cpu; +}; +extern void register_task_migration_notifier(struct notifier_block *n); + extern unsigned long get_parent_ip(unsigned long addr); +extern void dump_cpu_task(int cpu); + struct seq_file; struct cfs_rq; struct task_group; @@ -434,13 +444,28 @@ struct cpu_itimer { }; /** + * struct cputime - snaphsot of system and user cputime + * @utime: time spent in user mode + * @stime: time spent in system mode + * + * Gathers a generic snapshot of user and system time. + */ +struct cputime { + cputime_t utime; + cputime_t stime; +}; + +/** * struct task_cputime - collected CPU time counts * @utime: time spent in user mode, in &cputime_t units * @stime: time spent in kernel mode, in &cputime_t units * @sum_exec_runtime: total time spent on the CPU, in nanoseconds * - * This structure groups together three kinds of CPU time that are - * tracked for threads and thread groups. Most things considering + * This is an extension of struct cputime that includes the total runtime + * spent by the task from the scheduler point of view. + * + * As a result, this structure groups together three kinds of CPU time + * that are tracked for threads and thread groups. Most things considering * CPU time want to group these counts together and treat all three * of them in parallel. */ @@ -581,7 +606,7 @@ struct signal_struct { cputime_t gtime; cputime_t cgtime; #ifndef CONFIG_VIRT_CPU_ACCOUNTING - cputime_t prev_utime, prev_stime; + struct cputime prev_cputime; #endif unsigned long nvcsw, nivcsw, cnvcsw, cnivcsw; unsigned long min_flt, maj_flt, cmin_flt, cmaj_flt; @@ -631,9 +656,10 @@ struct signal_struct { struct rw_semaphore group_rwsem; #endif - int oom_score_adj; /* OOM kill score adjustment */ - int oom_score_adj_min; /* OOM kill score adjustment minimum value. - * Only settable by CAP_SYS_RESOURCE. */ + oom_flags_t oom_flags; + short oom_score_adj; /* OOM kill score adjustment */ + short oom_score_adj_min; /* OOM kill score adjustment min value. + * Only settable by CAP_SYS_RESOURCE. */ struct mutex cred_guard_mutex; /* guard against foreign influences on * credential calculations @@ -1061,6 +1087,7 @@ struct sched_class { #ifdef CONFIG_SMP int (*select_task_rq)(struct task_struct *p, int sd_flag, int flags); + void (*migrate_task_rq)(struct task_struct *p, int next_cpu); void (*pre_schedule) (struct rq *this_rq, struct task_struct *task); void (*post_schedule) (struct rq *this_rq); @@ -1095,6 +1122,18 @@ struct load_weight { unsigned long weight, inv_weight; }; +struct sched_avg { + /* + * These sums represent an infinite geometric series and so are bound + * above by 1024/(1-y). Thus we only need a u32 to store them for for all + * choices of y < 1-2^(-32)*1024. + */ + u32 runnable_avg_sum, runnable_avg_period; + u64 last_runnable_update; + s64 decay_count; + unsigned long load_avg_contrib; +}; + #ifdef CONFIG_SCHEDSTATS struct sched_statistics { u64 wait_start; @@ -1155,6 +1194,15 @@ struct sched_entity { /* rq "owned" by this entity/group: */ struct cfs_rq *my_q; #endif +/* + * Load-tracking only depends on SMP, FAIR_GROUP_SCHED dependency below may be + * removed when useful for applications beyond shares distribution (e.g. + * load-balance). + */ +#if defined(CONFIG_SMP) && defined(CONFIG_FAIR_GROUP_SCHED) + /* Per-entity load-tracking */ + struct sched_avg avg; +#endif }; struct sched_rt_entity { @@ -1318,7 +1366,7 @@ struct task_struct { cputime_t utime, stime, utimescaled, stimescaled; cputime_t gtime; #ifndef CONFIG_VIRT_CPU_ACCOUNTING - cputime_t prev_utime, prev_stime; + struct cputime prev_cputime; #endif unsigned long nvcsw, nivcsw; /* context switch counts */ struct timespec start_time; /* monotonic time */ @@ -1729,8 +1777,8 @@ static inline void put_task_struct(struct task_struct *t) __put_task_struct(t); } -extern void task_times(struct task_struct *p, cputime_t *ut, cputime_t *st); -extern void thread_group_times(struct task_struct *p, cputime_t *ut, cputime_t *st); +extern void task_cputime_adjusted(struct task_struct *p, cputime_t *ut, cputime_t *st); +extern void thread_group_cputime_adjusted(struct task_struct *p, cputime_t *ut, cputime_t *st); /* * Per process flags @@ -1844,14 +1892,6 @@ static inline void rcu_copy_process(struct task_struct *p) #endif -static inline void rcu_switch(struct task_struct *prev, - struct task_struct *next) -{ -#ifdef CONFIG_RCU_USER_QS - rcu_user_hooks_switch(prev, next); -#endif -} - static inline void tsk_restore_flags(struct task_struct *task, unsigned long orig_flags, unsigned long flags) { @@ -2271,7 +2311,7 @@ extern void mm_release(struct task_struct *, struct mm_struct *); extern struct mm_struct *dup_mm(struct task_struct *tsk); extern int copy_thread(unsigned long, unsigned long, unsigned long, - struct task_struct *, struct pt_regs *); + struct task_struct *); extern void flush_thread(void); extern void exit_thread(void); @@ -2283,14 +2323,13 @@ extern void flush_itimer_signals(void); extern void do_group_exit(int); -extern void daemonize(const char *, ...); extern int allow_signal(int); extern int disallow_signal(int); extern int do_execve(const char *, const char __user * const __user *, - const char __user * const __user *, struct pt_regs *); -extern long do_fork(unsigned long, unsigned long, struct pt_regs *, unsigned long, int __user *, int __user *); + const char __user * const __user *); +extern long do_fork(unsigned long, unsigned long, unsigned long, int __user *, int __user *); struct task_struct *fork_idle(int); #ifdef CONFIG_GENERIC_KERNEL_THREAD extern pid_t kernel_thread(int (*fn)(void *), void *arg, unsigned long flags); |