diff options
Diffstat (limited to 'include/linux/sched.h')
| -rw-r--r-- | include/linux/sched.h | 124 |
1 files changed, 98 insertions, 26 deletions
diff --git a/include/linux/sched.h b/include/linux/sched.h index 3d9120c5ad1..8478f334d73 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -287,7 +287,6 @@ extern void trap_init(void); extern void account_process_tick(struct task_struct *task, int user); extern void update_process_times(int user); extern void scheduler_tick(void); -extern void hrtick_resched(void); extern void sched_show_task(struct task_struct *p); @@ -352,7 +351,7 @@ arch_get_unmapped_area_topdown(struct file *filp, unsigned long addr, extern void arch_unmap_area(struct mm_struct *, unsigned long); extern void arch_unmap_area_topdown(struct mm_struct *, unsigned long); -#if NR_CPUS >= CONFIG_SPLIT_PTLOCK_CPUS +#if USE_SPLIT_PTLOCKS /* * The mm counters are not protected by its page_table_lock, * so must be incremented atomically. @@ -363,7 +362,7 @@ extern void arch_unmap_area_topdown(struct mm_struct *, unsigned long); #define inc_mm_counter(mm, member) atomic_long_inc(&(mm)->_##member) #define dec_mm_counter(mm, member) atomic_long_dec(&(mm)->_##member) -#else /* NR_CPUS < CONFIG_SPLIT_PTLOCK_CPUS */ +#else /* !USE_SPLIT_PTLOCKS */ /* * The mm counters are protected by its page_table_lock, * so can be incremented directly. @@ -374,7 +373,7 @@ extern void arch_unmap_area_topdown(struct mm_struct *, unsigned long); #define inc_mm_counter(mm, member) (mm)->_##member++ #define dec_mm_counter(mm, member) (mm)->_##member-- -#endif /* NR_CPUS < CONFIG_SPLIT_PTLOCK_CPUS */ +#endif /* !USE_SPLIT_PTLOCKS */ #define get_mm_rss(mm) \ (get_mm_counter(mm, file_rss) + get_mm_counter(mm, anon_rss)) @@ -403,12 +402,21 @@ extern int get_dumpable(struct mm_struct *mm); #define MMF_DUMP_MAPPED_PRIVATE 4 #define MMF_DUMP_MAPPED_SHARED 5 #define MMF_DUMP_ELF_HEADERS 6 +#define MMF_DUMP_HUGETLB_PRIVATE 7 +#define MMF_DUMP_HUGETLB_SHARED 8 #define MMF_DUMP_FILTER_SHIFT MMF_DUMPABLE_BITS -#define MMF_DUMP_FILTER_BITS 5 +#define MMF_DUMP_FILTER_BITS 7 #define MMF_DUMP_FILTER_MASK \ (((1 << MMF_DUMP_FILTER_BITS) - 1) << MMF_DUMP_FILTER_SHIFT) #define MMF_DUMP_FILTER_DEFAULT \ - ((1 << MMF_DUMP_ANON_PRIVATE) | (1 << MMF_DUMP_ANON_SHARED)) + ((1 << MMF_DUMP_ANON_PRIVATE) | (1 << MMF_DUMP_ANON_SHARED) |\ + (1 << MMF_DUMP_HUGETLB_PRIVATE) | MMF_DUMP_MASK_DEFAULT_ELF) + +#ifdef CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS +# define MMF_DUMP_MASK_DEFAULT_ELF (1 << MMF_DUMP_ELF_HEADERS) +#else +# define MMF_DUMP_MASK_DEFAULT_ELF 0 +#endif struct sighand_struct { atomic_t count; @@ -425,6 +433,39 @@ struct pacct_struct { unsigned long ac_minflt, ac_majflt; }; +/** + * 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 + * CPU time want to group these counts together and treat all three + * of them in parallel. + */ +struct task_cputime { + cputime_t utime; + cputime_t stime; + unsigned long long sum_exec_runtime; +}; +/* Alternate field names when used to cache expirations. */ +#define prof_exp stime +#define virt_exp utime +#define sched_exp sum_exec_runtime + +/** + * struct thread_group_cputime - thread group interval timer counts + * @totals: thread group interval timers; substructure for + * uniprocessor kernel, per-cpu for SMP kernel. + * + * This structure contains the version of task_cputime, above, that is + * used for thread group CPU clock calculations. + */ +struct thread_group_cputime { + struct task_cputime *totals; +}; + /* * NOTE! "signal_struct" does not have it's own * locking, because a shared signal_struct always @@ -451,8 +492,8 @@ struct signal_struct { * - everyone except group_exit_task is stopped during signal delivery * of fatal signals, group_exit_task processes the signal. */ - struct task_struct *group_exit_task; int notify_count; + struct task_struct *group_exit_task; /* thread group stop support, overloads group_exit_code too */ int group_stop_count; @@ -470,6 +511,17 @@ struct signal_struct { cputime_t it_prof_expires, it_virt_expires; cputime_t it_prof_incr, it_virt_incr; + /* + * Thread group totals for process CPU clocks. + * See thread_group_cputime(), et al, for details. + */ + struct thread_group_cputime cputime; + + /* Earliest-expiration cache. */ + struct task_cputime cputime_expires; + + struct list_head cpu_timers[3]; + /* job control IDs */ /* @@ -500,7 +552,7 @@ struct signal_struct { * Live threads maintain their own counters and add to these * in __exit_signal, except for the group leader. */ - cputime_t utime, stime, cutime, cstime; + cputime_t cutime, cstime; cputime_t gtime; cputime_t cgtime; unsigned long nvcsw, nivcsw, cnvcsw, cnivcsw; @@ -509,14 +561,6 @@ struct signal_struct { struct task_io_accounting ioac; /* - * Cumulative ns of scheduled CPU time for dead threads in the - * group, not including a zombie group leader. (This only differs - * from jiffies_to_ns(utime + stime) if sched_clock uses something - * other than jiffies.) - */ - unsigned long long sum_sched_runtime; - - /* * We don't bother to synchronize most readers of this at all, * because there is no reader checking a limit that actually needs * to get both rlim_cur and rlim_max atomically, and either one @@ -527,8 +571,6 @@ struct signal_struct { */ struct rlimit rlim[RLIM_NLIMITS]; - struct list_head cpu_timers[3]; - /* keep the process-shared keyrings here so that they do the right * thing in threads created with CLONE_THREAD */ #ifdef CONFIG_KEYS @@ -638,10 +680,6 @@ struct sched_info { }; #endif /* defined(CONFIG_SCHEDSTATS) || defined(CONFIG_TASK_DELAY_ACCT) */ -#ifdef CONFIG_SCHEDSTATS -extern const struct file_operations proc_schedstat_operations; -#endif /* CONFIG_SCHEDSTATS */ - #ifdef CONFIG_TASK_DELAY_ACCT struct task_delay_info { spinlock_t lock; @@ -824,6 +862,9 @@ struct sched_domain { unsigned int ttwu_move_affine; unsigned int ttwu_move_balance; #endif +#ifdef CONFIG_SCHED_DEBUG + char *name; +#endif }; extern void partition_sched_domains(int ndoms_new, cpumask_t *doms_new, @@ -897,7 +938,7 @@ struct sched_class { void (*yield_task) (struct rq *rq); int (*select_task_rq)(struct task_struct *p, int sync); - void (*check_preempt_curr) (struct rq *rq, struct task_struct *p); + void (*check_preempt_curr) (struct rq *rq, struct task_struct *p, int sync); struct task_struct * (*pick_next_task) (struct rq *rq); void (*put_prev_task) (struct rq *rq, struct task_struct *p); @@ -1010,8 +1051,8 @@ struct sched_entity { struct sched_rt_entity { struct list_head run_list; - unsigned int time_slice; unsigned long timeout; + unsigned int time_slice; int nr_cpus_allowed; struct sched_rt_entity *back; @@ -1134,8 +1175,7 @@ struct task_struct { /* mm fault and swap info: this can arguably be seen as either mm-specific or thread-specific */ unsigned long min_flt, maj_flt; - cputime_t it_prof_expires, it_virt_expires; - unsigned long long it_sched_expires; + struct task_cputime cputime_expires; struct list_head cpu_timers[3]; /* process credentials */ @@ -1301,6 +1341,12 @@ struct task_struct { int latency_record_count; struct latency_record latency_record[LT_SAVECOUNT]; #endif + /* + * time slack values; these are used to round up poll() and + * select() etc timeout values. These are in nanoseconds. + */ + unsigned long timer_slack_ns; + unsigned long default_timer_slack_ns; }; /* @@ -1585,6 +1631,7 @@ extern unsigned long long cpu_clock(int cpu); extern unsigned long long task_sched_runtime(struct task_struct *task); +extern unsigned long long thread_group_sched_runtime(struct task_struct *task); /* sched_exec is called by processes performing an exec */ #ifdef CONFIG_SMP @@ -1619,6 +1666,7 @@ extern unsigned int sysctl_sched_features; extern unsigned int sysctl_sched_migration_cost; extern unsigned int sysctl_sched_nr_migrate; extern unsigned int sysctl_sched_shares_ratelimit; +extern unsigned int sysctl_sched_shares_thresh; int sched_nr_latency_handler(struct ctl_table *table, int write, struct file *file, void __user *buffer, size_t *length, @@ -2082,6 +2130,30 @@ static inline int spin_needbreak(spinlock_t *lock) } /* + * Thread group CPU time accounting. + */ + +extern int thread_group_cputime_alloc(struct task_struct *); +extern void thread_group_cputime(struct task_struct *, struct task_cputime *); + +static inline void thread_group_cputime_init(struct signal_struct *sig) +{ + sig->cputime.totals = NULL; +} + +static inline int thread_group_cputime_clone_thread(struct task_struct *curr) +{ + if (curr->signal->cputime.totals) + return 0; + return thread_group_cputime_alloc(curr); +} + +static inline void thread_group_cputime_free(struct signal_struct *sig) +{ + free_percpu(sig->cputime.totals); +} + +/* * Reevaluate whether the task has signals pending delivery. * Wake the task if so. * This is required every time the blocked sigset_t changes. |