summaryrefslogtreecommitdiffstats
path: root/include/linux/sched.h
diff options
context:
space:
mode:
Diffstat (limited to 'include/linux/sched.h')
-rw-r--r--include/linux/sched.h241
1 files changed, 202 insertions, 39 deletions
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 38b4791e6a5..a06fc89cf6e 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -73,6 +73,7 @@ struct sched_param {
#include <linux/seccomp.h>
#include <linux/rcupdate.h>
#include <linux/futex.h>
+#include <linux/rtmutex.h>
#include <linux/time.h>
#include <linux/param.h>
@@ -83,6 +84,7 @@ struct sched_param {
#include <asm/processor.h>
struct exec_domain;
+struct futex_pi_state;
/*
* List of flags we want to share for kernel threads,
@@ -123,6 +125,7 @@ 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);
/*
@@ -145,6 +148,7 @@ extern unsigned long nr_iowait(void);
#define EXIT_DEAD 32
/* in tsk->state again */
#define TASK_NONINTERACTIVE 64
+#define TASK_DEAD 128
#define __set_task_state(tsk, state_value) \
do { (tsk)->state = (state_value); } while (0)
@@ -181,11 +185,11 @@ extern unsigned long nr_iowait(void);
extern rwlock_t tasklist_lock;
extern spinlock_t mmlist_lock;
-typedef struct task_struct task_t;
+struct task_struct;
extern void sched_init(void);
extern void sched_init_smp(void);
-extern void init_idle(task_t *idle, int cpu);
+extern void init_idle(struct task_struct *idle, int cpu);
extern cpumask_t nohz_cpu_mask;
@@ -358,6 +362,14 @@ 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
@@ -372,7 +384,7 @@ struct signal_struct {
wait_queue_head_t wait_chldexit; /* for wait4() */
/* current thread group signal load-balancing target: */
- task_t *curr_target;
+ struct task_struct *curr_target;
/* shared signal handling: */
struct sigpending shared_pending;
@@ -449,6 +461,13 @@ 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
+#ifdef CONFIG_TASKSTATS
+ spinlock_t stats_lock;
+ struct taskstats *stats;
+#endif
};
/* Context switch must be unlocked if interrupts are to be enabled */
@@ -483,8 +502,11 @@ 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 is_rt_policy(p) ((p) != SCHED_NORMAL && (p) != SCHED_BATCH)
+#define has_rt_policy(p) unlikely(is_rt_policy((p)->policy))
/*
* Some day this will be a full-fledged user tracking system..
@@ -517,11 +539,10 @@ extern struct user_struct *find_user(uid_t);
extern struct user_struct root_user;
#define INIT_USER (&root_user)
-typedef struct prio_array prio_array_t;
struct backing_dev_info;
struct reclaim_state;
-#ifdef CONFIG_SCHEDSTATS
+#if defined(CONFIG_SCHEDSTATS) || defined(CONFIG_TASK_DELAY_ACCT)
struct sched_info {
/* cumulative counters */
unsigned long cpu_time, /* time spent on the cpu */
@@ -532,9 +553,53 @@ struct sched_info {
unsigned long last_arrival, /* when we last ran on a cpu */
last_queued; /* when we were last queued to run */
};
+#endif /* defined(CONFIG_SCHEDSTATS) || defined(CONFIG_TASK_DELAY_ACCT) */
+#ifdef CONFIG_SCHEDSTATS
extern struct file_operations proc_schedstat_operations;
+#endif /* CONFIG_SCHEDSTATS */
+
+#ifdef CONFIG_TASK_DELAY_ACCT
+struct task_delay_info {
+ spinlock_t lock;
+ unsigned int flags; /* Private per-task flags */
+
+ /* For each stat XXX, add following, aligned appropriately
+ *
+ * struct timespec XXX_start, XXX_end;
+ * u64 XXX_delay;
+ * u32 XXX_count;
+ *
+ * Atomicity of updates to XXX_delay, XXX_count protected by
+ * single lock above (split into XXX_lock if contention is an issue).
+ */
+
+ /*
+ * XXX_count is incremented on every XXX operation, the delay
+ * associated with the operation is added to XXX_delay.
+ * XXX_delay contains the accumulated delay time in nanoseconds.
+ */
+ struct timespec blkio_start, blkio_end; /* Shared by blkio, swapin */
+ u64 blkio_delay; /* wait for sync block io completion */
+ u64 swapin_delay; /* wait for swapin block io completion */
+ u32 blkio_count; /* total count of the number of sync block */
+ /* io operations performed */
+ u32 swapin_count; /* total count of the number of swapin block */
+ /* io operations performed */
+};
+#endif /* CONFIG_TASK_DELAY_ACCT */
+
+static inline int sched_info_on(void)
+{
+#ifdef CONFIG_SCHEDSTATS
+ return 1;
+#elif defined(CONFIG_TASK_DELAY_ACCT)
+ extern int delayacct_on;
+ return delayacct_on;
+#else
+ return 0;
#endif
+}
enum idle_type
{
@@ -547,9 +612,9 @@ 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 +623,11 @@ 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 +697,7 @@ struct sched_domain {
#endif
};
-extern void partition_sched_domains(cpumask_t *partition1,
+extern int partition_sched_domains(cpumask_t *partition1,
cpumask_t *partition2);
/*
@@ -677,7 +747,7 @@ extern int groups_search(struct group_info *group_info, gid_t grp);
((gi)->blocks[(i)/NGROUPS_PER_BLOCK][(i)%NGROUPS_PER_BLOCK])
#ifdef ARCH_HAS_PREFETCH_SWITCH_STACK
-extern void prefetch_stack(struct task_struct*);
+extern void prefetch_stack(struct task_struct *t);
#else
static inline void prefetch_stack(struct task_struct *t) { }
#endif
@@ -693,6 +763,8 @@ enum sleep_type {
SLEEP_INTERRUPTED,
};
+struct prio_array;
+
struct task_struct {
volatile long state; /* -1 unrunnable, 0 runnable, >0 stopped */
struct thread_info *thread_info;
@@ -702,16 +774,20 @@ 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;
+ struct prio_array *array;
unsigned short ioprio;
+#ifdef CONFIG_BLK_DEV_IO_TRACE
unsigned int btrace_seq;
-
+#endif
unsigned long sleep_avg;
unsigned long long timestamp, last_ran;
unsigned long long sched_time; /* sched_clock time spent running */
@@ -721,7 +797,7 @@ struct task_struct {
cpumask_t cpus_allowed;
unsigned int time_slice, first_time_slice;
-#ifdef CONFIG_SCHEDSTATS
+#if defined(CONFIG_SCHEDSTATS) || defined(CONFIG_TASK_DELAY_ACCT)
struct sched_info sched_info;
#endif
@@ -745,6 +821,11 @@ struct task_struct {
unsigned did_exec:1;
pid_t pid;
pid_t tgid;
+
+#ifdef CONFIG_CC_STACKPROTECTOR
+ /* Canary value for the -fstack-protector gcc feature */
+ unsigned long stack_canary;
+#endif
/*
* pointers to (original) parent process, youngest child, younger sibling,
* older sibling, respectively. (p->father can be replaced with
@@ -791,6 +872,15 @@ struct task_struct {
struct key *thread_keyring; /* keyring private to this thread */
unsigned char jit_keyring; /* default keyring to attach requested keys to */
#endif
+ /*
+ * fpu_counter contains the number of consecutive context switches
+ * that the FPU is used. If this is over a threshold, the lazy fpu
+ * saving becomes unlazy to save the trap. This is an unsigned char
+ * so that after 256 times the counter wraps and the behavior turns
+ * lazy again; this to deal with bursty apps that only use FPU for
+ * a short time
+ */
+ unsigned char fpu_counter;
int oomkilladj; /* OOM kill score adjustment (bit shift). */
char comm[TASK_COMM_LEN]; /* executable name excluding path
- access with [gs]et_task_comm (which lock
@@ -798,8 +888,10 @@ struct task_struct {
- initialized normally by flush_old_exec */
/* file system info */
int link_count, total_link_count;
+#ifdef CONFIG_SYSVIPC
/* ipc stuff */
struct sysv_sem sysvsem;
+#endif
/* CPU-specific state of this task */
struct thread_struct thread;
/* filesystem information */
@@ -831,13 +923,43 @@ 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;
+#endif
#ifdef CONFIG_DEBUG_MUTEXES
/* mutex deadlock detection */
struct mutex_waiter *blocked_on;
#endif
+#ifdef CONFIG_TRACE_IRQFLAGS
+ unsigned int irq_events;
+ int hardirqs_enabled;
+ unsigned long hardirq_enable_ip;
+ unsigned int hardirq_enable_event;
+ unsigned long hardirq_disable_ip;
+ unsigned int hardirq_disable_event;
+ int softirqs_enabled;
+ unsigned long softirq_disable_ip;
+ unsigned int softirq_disable_event;
+ unsigned long softirq_enable_ip;
+ unsigned int softirq_enable_event;
+ int hardirq_context;
+ int softirq_context;
+#endif
+#ifdef CONFIG_LOCKDEP
+# define MAX_LOCK_DEPTH 30UL
+ u64 curr_chain_key;
+ int lockdep_depth;
+ struct held_lock held_locks[MAX_LOCK_DEPTH];
+ unsigned int lockdep_recursion;
+#endif
/* journalling filesystem info */
void *journal_info;
@@ -845,7 +967,6 @@ 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 +1001,8 @@ 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;
@@ -888,6 +1011,9 @@ struct task_struct {
* cache last used pipe for splice
*/
struct pipe_inode_info *splice_pipe;
+#ifdef CONFIG_TASK_DELAY_ACCT
+ struct task_delay_info *delays;
+#endif
};
static inline pid_t process_group(struct task_struct *tsk)
@@ -908,6 +1034,16 @@ static inline int pid_alive(struct task_struct *p)
return p->pids[PIDTYPE_PID].pid != NULL;
}
+/**
+ * is_init - check if a task structure is the first user space
+ * task the kernel created.
+ * @p: Task structure to be checked.
+ */
+static inline int is_init(struct task_struct *tsk)
+{
+ return tsk->pid == 1;
+}
+
extern void free_task(struct task_struct *tsk);
#define get_task_struct(tsk) do { atomic_inc(&(tsk)->usage); } while(0)
@@ -926,7 +1062,6 @@ static inline void put_task_struct(struct task_struct *t)
/* Not implemented yet, only for 486*/
#define PF_STARTING 0x00000002 /* being created */
#define PF_EXITING 0x00000004 /* getting shut down */
-#define PF_DEAD 0x00000008 /* Dead */
#define PF_FORKNOEXEC 0x00000040 /* forked but didn't exec */
#define PF_SUPERPRIV 0x00000100 /* used super-user privileges */
#define PF_DUMPCORE 0x00000200 /* dumped core */
@@ -947,6 +1082,7 @@ static inline void put_task_struct(struct task_struct *t)
#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
@@ -974,9 +1110,9 @@ static inline void put_task_struct(struct task_struct *t)
#define used_math() tsk_used_math(current)
#ifdef CONFIG_SMP
-extern int set_cpus_allowed(task_t *p, cpumask_t new_mask);
+extern int set_cpus_allowed(struct task_struct *p, cpumask_t new_mask);
#else
-static inline int set_cpus_allowed(task_t *p, cpumask_t new_mask)
+static inline int set_cpus_allowed(struct task_struct *p, cpumask_t new_mask)
{
if (!cpu_isset(0, new_mask))
return -EINVAL;
@@ -985,7 +1121,8 @@ static inline int set_cpus_allowed(task_t *p, cpumask_t new_mask)
#endif
extern unsigned long long sched_clock(void);
-extern unsigned long long current_sched_time(const task_t *current_task);
+extern unsigned long long
+current_sched_time(const struct task_struct *current_task);
/* sched_exec is called by processes performing an exec */
#ifdef CONFIG_SMP
@@ -1001,16 +1138,29 @@ static inline void idle_task_exit(void) {}
#endif
extern void sched_idle_next(void);
-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);
-extern int can_nice(const task_t *p, const int nice);
-extern int task_curr(const task_t *p);
+
+#ifdef CONFIG_RT_MUTEXES
+extern int rt_mutex_getprio(struct task_struct *p);
+extern void rt_mutex_setprio(struct task_struct *p, int prio);
+extern void rt_mutex_adjust_pi(struct task_struct *p);
+#else
+static inline int rt_mutex_getprio(struct task_struct *p)
+{
+ return p->normal_prio;
+}
+# define rt_mutex_adjust_pi(p) do { } while (0)
+#endif
+
+extern void set_user_nice(struct task_struct *p, long nice);
+extern int task_prio(const struct task_struct *p);
+extern int task_nice(const struct task_struct *p);
+extern int can_nice(const struct task_struct *p, const int nice);
+extern int task_curr(const struct task_struct *p);
extern int idle_cpu(int cpu);
extern int sched_setscheduler(struct task_struct *, int, struct sched_param *);
-extern task_t *idle_task(int cpu);
-extern task_t *curr_task(int cpu);
-extern void set_curr_task(int cpu, task_t *p);
+extern struct task_struct *idle_task(int cpu);
+extern struct task_struct *curr_task(int cpu);
+extern void set_curr_task(int cpu, struct task_struct *p);
void yield(void);
@@ -1056,7 +1206,7 @@ extern void switch_uid(struct user_struct *);
#include <asm/current.h>
-extern void do_timer(struct pt_regs *);
+extern void do_timer(unsigned long ticks);
extern int FASTCALL(wake_up_state(struct task_struct * tsk, unsigned int state));
extern int FASTCALL(wake_up_process(struct task_struct * tsk));
@@ -1067,8 +1217,8 @@ extern void FASTCALL(wake_up_new_task(struct task_struct * tsk,
#else
static inline void kick_process(struct task_struct *tsk) { }
#endif
-extern void FASTCALL(sched_fork(task_t * p, int clone_flags));
-extern void FASTCALL(sched_exit(task_t * p));
+extern void FASTCALL(sched_fork(struct task_struct * p, int clone_flags));
+extern void FASTCALL(sched_exit(struct task_struct * p));
extern int in_group_p(gid_t);
extern int in_egroup_p(gid_t);
@@ -1101,7 +1251,7 @@ extern int force_sig_info(int, struct siginfo *, struct task_struct *);
extern int __kill_pg_info(int sig, struct siginfo *info, pid_t pgrp);
extern int kill_pg_info(int, struct siginfo *, pid_t);
extern int kill_proc_info(int, struct siginfo *, pid_t);
-extern int kill_proc_info_as_uid(int, struct siginfo *, pid_t, uid_t, uid_t);
+extern int kill_proc_info_as_uid(int, struct siginfo *, pid_t, uid_t, uid_t, u32);
extern void do_notify_parent(struct task_struct *, int);
extern void force_sig(int, struct task_struct *);
extern void force_sig_specific(int, struct task_struct *);
@@ -1173,17 +1323,17 @@ extern NORET_TYPE void do_group_exit(int);
extern void daemonize(const char *, ...);
extern int allow_signal(int);
extern int disallow_signal(int);
-extern task_t *child_reaper;
+extern struct task_struct *child_reaper;
extern int do_execve(char *, char __user * __user *, char __user * __user *, struct pt_regs *);
extern long do_fork(unsigned long, unsigned long, struct pt_regs *, unsigned long, int __user *, int __user *);
-task_t *fork_idle(int);
+struct task_struct *fork_idle(int);
extern void set_task_comm(struct task_struct *tsk, char *from);
extern void get_task_comm(char *to, struct task_struct *tsk);
#ifdef CONFIG_SMP
-extern void wait_task_inactive(task_t * p);
+extern void wait_task_inactive(struct task_struct * p);
#else
#define wait_task_inactive(p) do { } while (0)
#endif
@@ -1209,13 +1359,13 @@ extern void wait_task_inactive(task_t * p);
/* de_thread depends on thread_group_leader not being a pid based check */
#define thread_group_leader(p) (p == p->group_leader)
-static inline task_t *next_thread(const task_t *p)
+static inline struct task_struct *next_thread(const struct task_struct *p)
{
return list_entry(rcu_dereference(p->thread_group.next),
- task_t, thread_group);
+ struct task_struct, thread_group);
}
-static inline int thread_group_empty(task_t *p)
+static inline int thread_group_empty(struct task_struct *p)
{
return list_empty(&p->thread_group);
}
@@ -1400,6 +1550,11 @@ 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
@@ -1429,6 +1584,14 @@ static inline void freeze(struct task_struct *p)
}
/*
+ * Sometimes we may need to cancel the previous 'freeze' request
+ */
+static inline void do_not_freeze(struct task_struct *p)
+{
+ p->flags &= ~PF_FREEZE;
+}
+
+/*
* Wake up a frozen process
*/
static inline int thaw_process(struct task_struct *p)
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-03-19 16:35:04 +0000