#include <linux/rbtree.h>
#include <linux/thread_info.h>
#include <linux/cpumask.h>
+#include <linux/errno.h>
#include <asm/system.h>
#include <asm/semaphore.h>
#include <asm/page.h>
#include <asm/ptrace.h>
#include <asm/mmu.h>
+#include <asm/cputime.h>
#include <linux/smp.h>
#include <linux/sem.h>
#include <linux/completion.h>
#include <linux/pid.h>
#include <linux/percpu.h>
+#include <linux/topology.h>
+#include <linux/vs_base.h>
struct exec_domain;
load += n*(FIXED_1-exp); \
load >>= FSHIFT;
-#define CT_TO_SECS(x) ((x) / HZ)
-#define CT_TO_USECS(x) (((x) % HZ) * 1000000/HZ)
-
+extern unsigned long total_forks;
extern int nr_threads;
extern int last_pid;
DECLARE_PER_CPU(unsigned long, process_counts);
#define TASK_UNINTERRUPTIBLE 2
#define TASK_STOPPED 4
#define TASK_TRACED 8
-#define TASK_ZOMBIE 16
-#define TASK_DEAD 32
+#define EXIT_ZOMBIE 16
+#define EXIT_DEAD 32
#define TASK_ONHOLD 64
#define __set_task_state(tsk, state_value) \
#define set_current_state(state_value) \
set_mb(current->state, (state_value))
+/* Task command name length */
+#define TASK_COMM_LEN 16
+
/*
* Scheduling policies
*/
extern void cpu_init (void);
extern void trap_init(void);
extern void update_process_times(int user);
-extern void scheduler_tick(int user_tick, int system);
+extern void scheduler_tick(void);
extern unsigned long cache_decay_ticks;
/* Attach to any functions which should be ignored in wchan output. */
atomic_t mm_count; /* How many references to "struct mm_struct" (users count as 1) */
int map_count; /* number of VMAs */
struct rw_semaphore mmap_sem;
- spinlock_t page_table_lock; /* Protects task page tables and mm->rss */
+ spinlock_t page_table_lock; /* Protects page tables, mm->rss, mm->anon_rss */
- struct list_head mmlist; /* List of all active mm's. These are globally strung
+ struct list_head mmlist; /* List of maybe swapped mm's. These are globally strung
* together off init_mm.mmlist, and are protected
* by mmlist_lock
*/
unsigned long start_code, end_code, start_data, end_data;
unsigned long start_brk, brk, start_stack;
unsigned long arg_start, arg_end, env_start, env_end;
- unsigned long rss, total_vm, locked_vm, shared_vm;
- unsigned long exec_vm, stack_vm, reserved_vm, def_flags;
+ unsigned long rss, anon_rss, total_vm, locked_vm, shared_vm;
+ unsigned long exec_vm, stack_vm, reserved_vm, def_flags, nr_ptes;
unsigned long saved_auxv[42]; /* for /proc/PID/auxv */
struct kioctx *ioctx_list;
struct kioctx default_kioctx;
-};
-extern int mmlist_nr;
+ unsigned long hiwater_rss; /* High-water RSS usage */
+ unsigned long hiwater_vm; /* High-water virtual memory usage */
+};
struct sighand_struct {
atomic_t count;
*/
struct signal_struct {
atomic_t count;
+ atomic_t live;
+
+ wait_queue_head_t wait_chldexit; /* for wait4() */
/* current thread group signal load-balancing target: */
task_t *curr_target;
struct sigpending shared_pending;
/* thread group exit support */
- int group_exit;
int group_exit_code;
/* overloaded:
* - notify group_exit_task when ->count is equal to notify_count
/* thread group stop support, overloads group_exit_code too */
int group_stop_count;
- /* 1 if group stopped since last SIGCONT, -1 if SIGCONT since report */
- int stop_state;
+ unsigned int flags; /* see SIGNAL_* flags below */
/* POSIX.1b Interval Timers */
struct list_head posix_timers;
* Live threads maintain their own counters and add to these
* in __exit_signal, except for the group leader.
*/
- unsigned long utime, stime, cutime, cstime;
+ cputime_t utime, stime, cutime, cstime;
unsigned long nvcsw, nivcsw, cnvcsw, cnivcsw;
unsigned long min_flt, maj_flt, cmin_flt, cmaj_flt;
+
+ /*
+ * 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
+ * alone is a single word that can safely be read normally.
+ * getrlimit/setrlimit use task_lock(current->group_leader) to
+ * protect this instead of the siglock, because they really
+ * have no need to disable irqs.
+ */
+ struct rlimit rlim[RLIM_NLIMITS];
};
+/*
+ * Bits in flags field of signal_struct.
+ */
+#define SIGNAL_STOP_STOPPED 0x00000001 /* job control stop in effect */
+#define SIGNAL_STOP_DEQUEUED 0x00000002 /* stop signal dequeued */
+#define SIGNAL_STOP_CONTINUED 0x00000004 /* SIGCONT since WCONTINUED reap */
+#define SIGNAL_GROUP_EXIT 0x00000008 /* group exit in progress */
+
+
/*
* Priority of a process goes from 0..MAX_PRIO-1, valid RT
* priority is 0..MAX_RT_PRIO-1, and SCHED_NORMAL tasks are
unsigned long mq_bytes; /* How many bytes can be allocated to mqueue? */
unsigned long locked_shm; /* How many pages of mlocked shm ? */
+#ifdef CONFIG_KEYS
+ struct key *uid_keyring; /* UID specific keyring */
+ struct key *session_keyring; /* UID's default session keyring */
+#endif
+
/* Hash table maintenance information */
struct list_head uidhash_list;
uid_t uid;
struct backing_dev_info;
struct reclaim_state;
-/* POSIX.1b interval timer structure. */
-struct k_itimer {
- struct list_head list; /* free/ allocate list */
- spinlock_t it_lock;
- clockid_t it_clock; /* which timer type */
- timer_t it_id; /* timer id */
- int it_overrun; /* overrun on pending signal */
- int it_overrun_last; /* overrun on last delivered signal */
- int it_requeue_pending; /* waiting to requeue this timer */
- int it_sigev_notify; /* notify word of sigevent struct */
- int it_sigev_signo; /* signo word of sigevent struct */
- sigval_t it_sigev_value; /* value word of sigevent struct */
- unsigned long it_incr; /* interval specified in jiffies */
- struct task_struct *it_process; /* process to send signal to */
- struct timer_list it_timer;
- struct sigqueue *sigq; /* signal queue entry. */
- struct list_head abs_timer_entry; /* clock abs_timer_list */
- struct timespec wall_to_prev; /* wall_to_monotonic used when set */
-};
-
#ifdef CONFIG_SCHEDSTATS
struct sched_info {
/* cumulative counters */
extern struct file_operations proc_schedstat_operations;
#endif
+enum idle_type
+{
+ SCHED_IDLE,
+ NOT_IDLE,
+ NEWLY_IDLE,
+ MAX_IDLE_TYPES
+};
+
+/*
+ * sched-domains (multiprocessor balancing) declarations:
+ */
+#ifdef CONFIG_SMP
+#define SCHED_LOAD_SCALE 128UL /* increase resolution of load */
+
+#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 */
+#define SD_WAKE_IDLE 8 /* Wake to idle CPU on task wakeup */
+#define SD_WAKE_AFFINE 16 /* Wake task to waking CPU */
+#define SD_WAKE_BALANCE 32 /* Perform balancing at task wakeup */
+#define SD_SHARE_CPUPOWER 64 /* Domain members share cpu power */
+
+struct sched_group {
+ struct sched_group *next; /* Must be a circular list */
+ cpumask_t cpumask;
+
+ /*
+ * CPU power of this group, SCHED_LOAD_SCALE being max power for a
+ * single CPU. This is read only (except for setup, hotplug CPU).
+ */
+ unsigned long cpu_power;
+};
+
+struct sched_domain {
+ /* These fields must be setup */
+ struct sched_domain *parent; /* top domain must be null terminated */
+ struct sched_group *groups; /* the balancing groups of the domain */
+ cpumask_t span; /* span of all CPUs in this domain */
+ unsigned long min_interval; /* Minimum balance interval ms */
+ unsigned long max_interval; /* Maximum balance interval ms */
+ unsigned int busy_factor; /* less balancing by factor if busy */
+ unsigned int imbalance_pct; /* No balance until over watermark */
+ unsigned long long cache_hot_time; /* Task considered cache hot (ns) */
+ unsigned int cache_nice_tries; /* Leave cache hot tasks for # tries */
+ unsigned int per_cpu_gain; /* CPU % gained by adding domain cpus */
+ int flags; /* See SD_* */
+
+ /* Runtime fields. */
+ unsigned long last_balance; /* init to jiffies. units in jiffies */
+ unsigned int balance_interval; /* initialise to 1. units in ms. */
+ unsigned int nr_balance_failed; /* initialise to 0 */
+
+#ifdef CONFIG_SCHEDSTATS
+ /* load_balance() stats */
+ unsigned long lb_cnt[MAX_IDLE_TYPES];
+ unsigned long lb_failed[MAX_IDLE_TYPES];
+ unsigned long lb_imbalance[MAX_IDLE_TYPES];
+ unsigned long lb_nobusyg[MAX_IDLE_TYPES];
+ unsigned long lb_nobusyq[MAX_IDLE_TYPES];
+
+ /* sched_balance_exec() stats */
+ unsigned long sbe_attempts;
+ unsigned long sbe_pushed;
+
+ /* try_to_wake_up() stats */
+ unsigned long ttwu_wake_affine;
+ unsigned long ttwu_wake_balance;
+#endif
+};
+
+#ifdef ARCH_HAS_SCHED_DOMAIN
+/* Useful helpers that arch setup code may use. Defined in kernel/sched.c */
+extern cpumask_t cpu_isolated_map;
+extern void init_sched_build_groups(struct sched_group groups[],
+ cpumask_t span, int (*group_fn)(int cpu));
+extern void cpu_attach_domain(struct sched_domain *sd, int cpu);
+#endif /* ARCH_HAS_SCHED_DOMAIN */
+#endif /* CONFIG_SMP */
+
+
struct io_context; /* See blkdev.h */
void exit_io_context(void);
prio_array_t *array;
unsigned long sleep_avg;
- long interactive_credit;
unsigned long long timestamp, last_ran;
int activated;
/* task state */
struct linux_binfmt *binfmt;
+ long exit_state;
int exit_code, exit_signal;
int pdeath_signal; /* The signal sent when the parent dies */
/* ??? */
/* PID/PID hash table linkage. */
struct pid pids[PIDTYPE_MAX];
- wait_queue_head_t wait_chldexit; /* for wait4() */
struct completion *vfork_done; /* for vfork() */
int __user *set_child_tid; /* CLONE_CHILD_SETTID */
int __user *clear_child_tid; /* CLONE_CHILD_CLEARTID */
unsigned long rt_priority;
- unsigned long it_real_value, it_prof_value, it_virt_value;
- unsigned long it_real_incr, it_prof_incr, it_virt_incr;
+ unsigned long it_real_value, it_real_incr;
+ cputime_t it_virt_value, it_virt_incr;
+ cputime_t it_prof_value, it_prof_incr;
struct timer_list real_timer;
- unsigned long utime, stime;
+ cputime_t utime, stime;
unsigned long nvcsw, nivcsw; /* context switch counts */
struct timespec start_time;
/* mm fault and swap info: this can arguably be seen as either mm-specific or thread-specific */
kernel_cap_t cap_effective, cap_inheritable, cap_permitted;
unsigned keep_capabilities:1;
struct user_struct *user;
-/* limits */
- struct rlimit rlim[RLIM_NLIMITS];
- unsigned short used_math;
- char comm[16];
+#ifdef CONFIG_KEYS
+ struct key *session_keyring; /* keyring inherited over fork */
+ struct key *process_keyring; /* keyring private to this process (CLONE_THREAD) */
+ struct key *thread_keyring; /* keyring private to this thread */
+#endif
+ int oomkilladj; /* OOM kill score adjustment (bit shift). */
+ char comm[TASK_COMM_LEN];
/* file system info */
int link_count, total_link_count;
/* ipc stuff */
/* Thread group tracking */
u32 parent_exec_id;
u32 self_exec_id;
-/* Protection of (de-)allocation: mm, files, fs, tty */
+/* 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;
* to a stack based synchronous wait) if its doing sync IO.
*/
wait_queue_t *io_wait;
+/* i/o counters(bytes read/written, #syscalls */
+ u64 rchar, wchar, syscr, syscw;
+#if defined(CONFIG_BSD_PROCESS_ACCT)
+ u64 acct_rss_mem1; /* accumulated rss usage */
+ u64 acct_vm_mem1; /* accumulated virtual memory usage */
+ clock_t acct_stimexpd; /* clock_t-converted stime since last update */
+#endif
#ifdef CONFIG_NUMA
struct mempolicy *mempolicy;
- short il_next; /* could be shared with used_math */
+ short il_next;
#endif
};
return tsk->signal->pgrp;
}
+/**
+ * pid_alive - check that a task structure is not stale
+ * @p: Task structure to be checked.
+ *
+ * Test if a process is not yet dead (at most zombie state)
+ * If pid_alive fails, then pointers within the task structure
+ * can be stale and must not be dereferenced.
+ */
+static inline int pid_alive(struct task_struct *p)
+{
+ return p->pids[PIDTYPE_PID].nr != 0;
+}
+
extern void free_task(struct task_struct *tsk);
extern void __put_task_struct(struct task_struct *tsk);
#define get_task_struct(tsk) do { atomic_inc(&(tsk)->usage); } while(0)
#define PF_DUMPCORE 0x00000200 /* dumped core */
#define PF_SIGNALED 0x00000400 /* killed by a signal */
#define PF_MEMALLOC 0x00000800 /* Allocating memory */
-#define PF_MEMDIE 0x00001000 /* Killed for out-of-memory */
-#define PF_FLUSHER 0x00002000 /* responsible for disk writeback */
-
-#define PF_FREEZE 0x00004000 /* this task should be frozen for suspend */
+#define PF_FLUSHER 0x00001000 /* responsible for disk writeback */
+#define PF_USED_MATH 0x00002000 /* if unset the fpu must be initialized before use */
+#define PF_FREEZE 0x00004000 /* this task is being frozen for suspend now */
#define PF_NOFREEZE 0x00008000 /* this thread should not be frozen */
#define PF_FROZEN 0x00010000 /* frozen for system suspend */
#define PF_FSTRANS 0x00020000 /* inside a filesystem transaction */
#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 */
+
+/*
+ * Only the _current_ task can read/write to tsk->flags, but other
+ * tasks can access tsk->flags in readonly mode for example
+ * with tsk_used_math (like during threaded core dumping).
+ * There is however an exception to this rule during ptrace
+ * or during fork: the ptracer task is allowed to write to the
+ * child->flags of its traced child (same goes for fork, the parent
+ * can write to the child->flags), because we're guaranteed the
+ * child is not running and in turn not changing child->flags
+ * at the same time the parent does it.
+ */
+#define clear_stopped_child_used_math(child) do { (child)->flags &= ~PF_USED_MATH; } while (0)
+#define set_stopped_child_used_math(child) do { (child)->flags |= PF_USED_MATH; } while (0)
+#define clear_used_math() clear_stopped_child_used_math(current)
+#define set_used_math() set_stopped_child_used_math(current)
+#define conditional_stopped_child_used_math(condition, child) \
+ do { (child)->flags &= ~PF_USED_MATH, (child)->flags |= (condition) ? PF_USED_MATH : 0; } while (0)
+#define conditional_used_math(condition) \
+ conditional_stopped_child_used_math(condition, current)
+#define copy_to_stopped_child_used_math(child) \
+ do { (child)->flags &= ~PF_USED_MATH, (child)->flags |= current->flags & PF_USED_MATH; } while (0)
+/* NOTE: this will return 0 or PF_USED_MATH, it will never return 1 */
+#define tsk_used_math(p) ((p)->flags & PF_USED_MATH)
+#define used_math() tsk_used_math(current)
#ifdef CONFIG_SMP
extern int set_cpus_allowed(task_t *p, cpumask_t new_mask);
#else
static inline int set_cpus_allowed(task_t *p, cpumask_t new_mask)
{
+ if (!cpus_intersects(new_mask, cpu_online_map))
+ return -EINVAL;
return 0;
}
#endif
#define sched_exec() {}
#endif
+#ifdef CONFIG_HOTPLUG_CPU
+extern void idle_task_exit(void);
+#else
+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 task_curr(const task_t *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);
void yield(void);
#include <asm/current.h>
-extern unsigned long itimer_ticks;
-extern unsigned long itimer_next;
extern void do_timer(struct pt_regs *);
extern int FASTCALL(wake_up_state(struct task_struct * tsk, unsigned int state));
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_sl_info(int, struct siginfo *, pid_t);
extern int kill_proc_info(int, struct siginfo *, pid_t);
extern void do_notify_parent(struct task_struct *, int);
extern void force_sig(int, struct task_struct *);
#ifdef CONFIG_SECURITY
/* code is in security.c */
extern int capable(int cap);
+extern int vx_capable(int cap, int ccap);
#else
static inline int capable(int cap)
{
+ if (vx_check_bit(VXC_CAP_MASK, cap) && !vx_mcaps(1L << cap))
+ return 0;
if (cap_raised(current->cap_effective, cap)) {
current->flags |= PF_SUPERPRIV;
return 1;
}
return 0;
}
+
+static inline int vx_capable(int cap, int ccap)
+{
+ if (cap_raised(current->cap_effective, cap) &&
+ vx_ccaps(ccap)) {
+ current->flags |= PF_SUPERPRIV;
+ return 1;
+ }
+ return 0;
+}
#endif
/*
extern void unhash_process(struct task_struct *p);
/*
- * Protects ->fs, ->files, ->mm, ->ptrace, ->group_info, ->comm and
- * synchronises with wait4().
+ * Protects ->fs, ->files, ->mm, ->ptrace, ->group_info, ->comm, keyring
+ * subscriptions and synchronises with wait4(). Also used in procfs.
*
* Nests both inside and outside of read_lock(&tasklist_lock).
* It must not be nested with write_lock_irq(&tasklist_lock),
return unlikely(test_thread_flag(TIF_NEED_RESCHED));
}
-extern void __cond_resched(void);
-static inline void cond_resched(void)
-{
- if (need_resched())
- __cond_resched();
-}
+/*
+ * cond_resched() and cond_resched_lock(): latency reduction via
+ * explicit rescheduling in places that are safe. The return
+ * value indicates whether a reschedule was done in fact.
+ * cond_resched_lock() will drop the spinlock before scheduling,
+ * cond_resched_softirq() will enable bhs before scheduling.
+ */
+extern int cond_resched(void);
+extern int cond_resched_lock(spinlock_t * lock);
+extern int cond_resched_softirq(void);
/*
- * cond_resched_lock() - if a reschedule is pending, drop the given lock,
- * call schedule, and on return reacquire the lock.
- *
- * This works OK both with and without CONFIG_PREEMPT. We do strange low-level
- * operations here to prevent schedule() from being called twice (once via
- * spin_unlock(), once by hand).
+ * Does a critical section need to be broken due to another
+ * task waiting?:
+ */
+#if defined(CONFIG_PREEMPT) && defined(CONFIG_SMP)
+# define need_lockbreak(lock) ((lock)->break_lock)
+#else
+# define need_lockbreak(lock) 0
+#endif
+
+/*
+ * Does a critical section need to be broken due to another
+ * task waiting or preemption being signalled:
*/
-static inline void cond_resched_lock(spinlock_t * lock)
+static inline int lock_need_resched(spinlock_t *lock)
{
- if (need_resched()) {
- _raw_spin_unlock(lock);
- preempt_enable_no_resched();
- __cond_resched();
- spin_lock(lock);
- }
+ if (need_lockbreak(lock) || need_resched())
+ return 1;
+ return 0;
}
/* Reevaluate whether the task has signals pending delivery.
extern long sched_setaffinity(pid_t pid, cpumask_t new_mask);
extern long sched_getaffinity(pid_t pid, cpumask_t *mask);
+#ifdef CONFIG_MAGIC_SYSRQ
+
+extern void normalize_rt_tasks(void);
+
+#endif
+
+/* try_to_freeze
+ *
+ * Checks whether we need to enter the refrigerator
+ * and returns 1 if we did so.
+ */
+#ifdef CONFIG_PM
+extern void refrigerator(unsigned long);
+extern int freeze_processes(void);
+extern void thaw_processes(void);
+
+static inline int try_to_freeze(unsigned long refrigerator_flags)
+{
+ if (unlikely(current->flags & PF_FREEZE)) {
+ refrigerator(refrigerator_flags);
+ return 1;
+ } else
+ return 0;
+}
+#else
+static inline void refrigerator(unsigned long flag) {}
+static inline int freeze_processes(void) { BUG(); return 0; }
+static inline void thaw_processes(void) {}
+
+static inline int try_to_freeze(unsigned long refrigerator_flags)
+{
+ return 0;
+}
+#endif /* CONFIG_PM */
#endif /* __KERNEL__ */
#endif
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