diff options
Diffstat (limited to 'include/linux/sched.h')
| -rw-r--r-- | include/linux/sched.h | 178 |
1 files changed, 117 insertions, 61 deletions
diff --git a/include/linux/sched.h b/include/linux/sched.h index 29b7d4f87d20..821f0481ebe1 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -1,9 +1,46 @@ #ifndef _LINUX_SCHED_H #define _LINUX_SCHED_H +#include <linux/auxvec.h> /* For AT_VECTOR_SIZE */ + +/* + * cloning flags: + */ +#define CSIGNAL 0x000000ff /* signal mask to be sent at exit */ +#define CLONE_VM 0x00000100 /* set if VM shared between processes */ +#define CLONE_FS 0x00000200 /* set if fs info shared between processes */ +#define CLONE_FILES 0x00000400 /* set if open files shared between processes */ +#define CLONE_SIGHAND 0x00000800 /* set if signal handlers and blocked signals shared */ +#define CLONE_PTRACE 0x00002000 /* set if we want to let tracing continue on the child too */ +#define CLONE_VFORK 0x00004000 /* set if the parent wants the child to wake it up on mm_release */ +#define CLONE_PARENT 0x00008000 /* set if we want to have the same parent as the cloner */ +#define CLONE_THREAD 0x00010000 /* Same thread group? */ +#define CLONE_NEWNS 0x00020000 /* New namespace group? */ +#define CLONE_SYSVSEM 0x00040000 /* share system V SEM_UNDO semantics */ +#define CLONE_SETTLS 0x00080000 /* create a new TLS for the child */ +#define CLONE_PARENT_SETTID 0x00100000 /* set the TID in the parent */ +#define CLONE_CHILD_CLEARTID 0x00200000 /* clear the TID in the child */ +#define CLONE_DETACHED 0x00400000 /* Unused, ignored */ +#define CLONE_UNTRACED 0x00800000 /* set if the tracing process can't force CLONE_PTRACE on this clone */ +#define CLONE_CHILD_SETTID 0x01000000 /* set the TID in the child */ +#define CLONE_STOPPED 0x02000000 /* Start in stopped state */ + +/* + * Scheduling policies + */ +#define SCHED_NORMAL 0 +#define SCHED_FIFO 1 +#define SCHED_RR 2 +#define SCHED_BATCH 3 + +#ifdef __KERNEL__ + +struct sched_param { + int sched_priority; +}; + #include <asm/param.h> /* for HZ */ -#include <linux/config.h> #include <linux/capability.h> #include <linux/threads.h> #include <linux/kernel.h> @@ -36,32 +73,18 @@ #include <linux/seccomp.h> #include <linux/rcupdate.h> #include <linux/futex.h> +#include <linux/rtmutex.h> -#include <linux/auxvec.h> /* For AT_VECTOR_SIZE */ +#include <linux/time.h> +#include <linux/param.h> +#include <linux/resource.h> +#include <linux/timer.h> +#include <linux/hrtimer.h> -struct exec_domain; +#include <asm/processor.h> -/* - * cloning flags: - */ -#define CSIGNAL 0x000000ff /* signal mask to be sent at exit */ -#define CLONE_VM 0x00000100 /* set if VM shared between processes */ -#define CLONE_FS 0x00000200 /* set if fs info shared between processes */ -#define CLONE_FILES 0x00000400 /* set if open files shared between processes */ -#define CLONE_SIGHAND 0x00000800 /* set if signal handlers and blocked signals shared */ -#define CLONE_PTRACE 0x00002000 /* set if we want to let tracing continue on the child too */ -#define CLONE_VFORK 0x00004000 /* set if the parent wants the child to wake it up on mm_release */ -#define CLONE_PARENT 0x00008000 /* set if we want to have the same parent as the cloner */ -#define CLONE_THREAD 0x00010000 /* Same thread group? */ -#define CLONE_NEWNS 0x00020000 /* New namespace group? */ -#define CLONE_SYSVSEM 0x00040000 /* share system V SEM_UNDO semantics */ -#define CLONE_SETTLS 0x00080000 /* create a new TLS for the child */ -#define CLONE_PARENT_SETTID 0x00100000 /* set the TID in the parent */ -#define CLONE_CHILD_CLEARTID 0x00200000 /* clear the TID in the child */ -#define CLONE_DETACHED 0x00400000 /* Unused, ignored */ -#define CLONE_UNTRACED 0x00800000 /* set if the tracing process can't force CLONE_PTRACE on this clone */ -#define CLONE_CHILD_SETTID 0x01000000 /* set the TID in the child */ -#define CLONE_STOPPED 0x02000000 /* Start in stopped state */ +struct exec_domain; +struct futex_pi_state; /* * List of flags we want to share for kernel threads, @@ -102,14 +125,8 @@ extern unsigned long nr_running(void); extern unsigned long nr_uninterruptible(void); extern unsigned long nr_active(void); extern unsigned long nr_iowait(void); +extern unsigned long weighted_cpuload(const int cpu); -#include <linux/time.h> -#include <linux/param.h> -#include <linux/resource.h> -#include <linux/timer.h> -#include <linux/hrtimer.h> - -#include <asm/processor.h> /* * Task state bitmask. NOTE! These bits are also @@ -156,20 +173,6 @@ extern unsigned long nr_iowait(void); /* Task command name length */ #define TASK_COMM_LEN 16 -/* - * Scheduling policies - */ -#define SCHED_NORMAL 0 -#define SCHED_FIFO 1 -#define SCHED_RR 2 -#define SCHED_BATCH 3 - -struct sched_param { - int sched_priority; -}; - -#ifdef __KERNEL__ - #include <linux/spinlock.h> /* @@ -358,6 +361,14 @@ struct sighand_struct { spinlock_t siglock; }; +struct pacct_struct { + int ac_flag; + long ac_exitcode; + unsigned long ac_mem; + cputime_t ac_utime, ac_stime; + unsigned long ac_minflt, ac_majflt; +}; + /* * NOTE! "signal_struct" does not have it's own * locking, because a shared signal_struct always @@ -449,6 +460,9 @@ struct signal_struct { struct key *session_keyring; /* keyring inherited over fork */ struct key *process_keyring; /* keyring private to this process */ #endif +#ifdef CONFIG_BSD_PROCESS_ACCT + struct pacct_struct pacct; /* per-process accounting information */ +#endif }; /* Context switch must be unlocked if interrupts are to be enabled */ @@ -483,8 +497,11 @@ struct signal_struct { #define MAX_PRIO (MAX_RT_PRIO + 40) -#define rt_task(p) (unlikely((p)->prio < MAX_RT_PRIO)) +#define rt_prio(prio) unlikely((prio) < MAX_RT_PRIO) +#define rt_task(p) rt_prio((p)->prio) #define batch_task(p) (unlikely((p)->policy == SCHED_BATCH)) +#define has_rt_policy(p) \ + unlikely((p)->policy != SCHED_NORMAL && (p)->policy != SCHED_BATCH) /* * Some day this will be a full-fledged user tracking system.. @@ -494,7 +511,7 @@ struct user_struct { atomic_t processes; /* How many processes does this user have? */ atomic_t files; /* How many open files does this user have? */ atomic_t sigpending; /* How many pending signals does this user have? */ -#ifdef CONFIG_INOTIFY +#ifdef CONFIG_INOTIFY_USER atomic_t inotify_watches; /* How many inotify watches does this user have? */ atomic_t inotify_devs; /* How many inotify devs does this user have opened? */ #endif @@ -547,9 +564,9 @@ enum idle_type /* * sched-domains (multiprocessor balancing) declarations: */ -#ifdef CONFIG_SMP #define SCHED_LOAD_SCALE 128UL /* increase resolution of load */ +#ifdef CONFIG_SMP #define SD_LOAD_BALANCE 1 /* Do load balancing on this domain. */ #define SD_BALANCE_NEWIDLE 2 /* Balance when about to become idle */ #define SD_BALANCE_EXEC 4 /* Balance on exec */ @@ -558,6 +575,11 @@ enum idle_type #define SD_WAKE_AFFINE 32 /* Wake task to waking CPU */ #define SD_WAKE_BALANCE 64 /* Perform balancing at task wakeup */ #define SD_SHARE_CPUPOWER 128 /* Domain members share cpu power */ +#define SD_POWERSAVINGS_BALANCE 256 /* Balance for power savings */ + +#define BALANCE_FOR_POWER ((sched_mc_power_savings || sched_smt_power_savings) \ + ? SD_POWERSAVINGS_BALANCE : 0) + struct sched_group { struct sched_group *next; /* Must be a circular list */ @@ -627,7 +649,7 @@ struct sched_domain { #endif }; -extern void partition_sched_domains(cpumask_t *partition1, +extern int partition_sched_domains(cpumask_t *partition1, cpumask_t *partition2); /* @@ -702,10 +724,13 @@ struct task_struct { int lock_depth; /* BKL lock depth */ -#if defined(CONFIG_SMP) && defined(__ARCH_WANT_UNLOCKED_CTXSW) +#ifdef CONFIG_SMP +#ifdef __ARCH_WANT_UNLOCKED_CTXSW int oncpu; #endif - int prio, static_prio; +#endif + int load_weight; /* for niceness load balancing purposes */ + int prio, static_prio, normal_prio; struct list_head run_list; prio_array_t *array; @@ -831,8 +856,20 @@ struct task_struct { u32 self_exec_id; /* Protection of (de-)allocation: mm, files, fs, tty, keyrings */ spinlock_t alloc_lock; -/* Protection of proc_dentry: nesting proc_lock, dcache_lock, write_lock_irq(&tasklist_lock); */ - spinlock_t proc_lock; + + /* Protection of the PI data structures: */ + spinlock_t pi_lock; + +#ifdef CONFIG_RT_MUTEXES + /* PI waiters blocked on a rt_mutex held by this task */ + struct plist_head pi_waiters; + /* Deadlock detection and priority inheritance handling */ + struct rt_mutex_waiter *pi_blocked_on; +# ifdef CONFIG_DEBUG_RT_MUTEXES + spinlock_t held_list_lock; + struct list_head held_list_head; +# endif +#endif #ifdef CONFIG_DEBUG_MUTEXES /* mutex deadlock detection */ @@ -845,7 +882,6 @@ struct task_struct { /* VM state */ struct reclaim_state *reclaim_state; - struct dentry *proc_dentry; struct backing_dev_info *backing_dev_info; struct io_context *io_context; @@ -880,6 +916,8 @@ struct task_struct { #ifdef CONFIG_COMPAT struct compat_robust_list_head __user *compat_robust_list; #endif + struct list_head pi_state_list; + struct futex_pi_state *pi_state_cache; atomic_t fs_excl; /* holding fs exclusive resources */ struct rcu_head rcu; @@ -941,13 +979,13 @@ static inline void put_task_struct(struct task_struct *t) #define PF_KSWAPD 0x00040000 /* I am kswapd */ #define PF_SWAPOFF 0x00080000 /* I am in swapoff */ #define PF_LESS_THROTTLE 0x00100000 /* Throttle me less: I clean memory */ -#define PF_SYNCWRITE 0x00200000 /* I am doing a sync write */ -#define PF_BORROWED_MM 0x00400000 /* I am a kthread doing use_mm */ -#define PF_RANDOMIZE 0x00800000 /* randomize virtual address space */ -#define PF_SWAPWRITE 0x01000000 /* Allowed to write to swap */ -#define PF_SPREAD_PAGE 0x04000000 /* Spread page cache over cpuset */ -#define PF_SPREAD_SLAB 0x08000000 /* Spread some slab caches over cpuset */ +#define PF_BORROWED_MM 0x00200000 /* I am a kthread doing use_mm */ +#define PF_RANDOMIZE 0x00400000 /* randomize virtual address space */ +#define PF_SWAPWRITE 0x00800000 /* Allowed to write to swap */ +#define PF_SPREAD_PAGE 0x01000000 /* Spread page cache over cpuset */ +#define PF_SPREAD_SLAB 0x02000000 /* Spread some slab caches over cpuset */ #define PF_MEMPOLICY 0x10000000 /* Non-default NUMA mempolicy */ +#define PF_MUTEX_TESTER 0x20000000 /* Thread belongs to the rt mutex tester */ /* * Only the _current_ task can read/write to tsk->flags, but other @@ -1002,6 +1040,19 @@ static inline void idle_task_exit(void) {} #endif extern void sched_idle_next(void); + +#ifdef CONFIG_RT_MUTEXES +extern int rt_mutex_getprio(task_t *p); +extern void rt_mutex_setprio(task_t *p, int prio); +extern void rt_mutex_adjust_pi(task_t *p); +#else +static inline int rt_mutex_getprio(task_t *p) +{ + return p->normal_prio; +} +# define rt_mutex_adjust_pi(p) do { } while (0) +#endif + extern void set_user_nice(task_t *p, long nice); extern int task_prio(const task_t *p); extern int task_nice(const task_t *p); @@ -1225,7 +1276,7 @@ static inline int thread_group_empty(task_t *p) (thread_group_leader(p) && !thread_group_empty(p)) /* - * Protects ->fs, ->files, ->mm, ->ptrace, ->group_info, ->comm, keyring + * Protects ->fs, ->files, ->mm, ->group_info, ->comm, keyring * subscriptions and synchronises with wait4(). Also used in procfs. Also * pins the final release of task.io_context. Also protects ->cpuset. * @@ -1401,6 +1452,11 @@ static inline void arch_pick_mmap_layout(struct mm_struct *mm) extern long sched_setaffinity(pid_t pid, cpumask_t new_mask); extern long sched_getaffinity(pid_t pid, cpumask_t *mask); +#include <linux/sysdev.h> +extern int sched_mc_power_savings, sched_smt_power_savings; +extern struct sysdev_attribute attr_sched_mc_power_savings, attr_sched_smt_power_savings; +extern int sched_create_sysfs_power_savings_entries(struct sysdev_class *cls); + extern void normalize_rt_tasks(void); #ifdef CONFIG_PM |