#include <linux/completion.h>
#include <linux/pid.h>
#include <linux/percpu.h>
+#include <linux/topology.h>
struct exec_domain;
+extern int exec_shield;
+extern int exec_shield_randomize;
+extern int print_fatal_signals;
/*
* cloning flags:
#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_IDLETASK 0x00001000 /* set if new pid should be 0 (kernel only)*/
#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 */
extern int nr_threads;
extern int last_pid;
DECLARE_PER_CPU(unsigned long, process_counts);
+// DECLARE_PER_CPU(struct runqueue, runqueues); -- removed after ckrm cpu v7 merge
extern int nr_processes(void);
extern unsigned long nr_running(void);
extern unsigned long nr_uninterruptible(void);
#define TASK_INTERRUPTIBLE 1
#define TASK_UNINTERRUPTIBLE 2
#define TASK_STOPPED 4
-#define TASK_ZOMBIE 8
-#define TASK_DEAD 16
+#define TASK_TRACED 8
+#define EXIT_ZOMBIE 16
+#define EXIT_DEAD 32
+#define TASK_ONHOLD 64
#define __set_task_state(tsk, state_value) \
do { (tsk)->state = (state_value); } while (0)
#ifdef __KERNEL__
+#include <linux/taskdelays.h>
#include <linux/spinlock.h>
/*
typedef struct task_struct task_t;
extern void sched_init(void);
+extern void sched_init_smp(void);
extern void init_idle(task_t *idle, int cpu);
-extern cpumask_t idle_cpu_mask;
+extern cpumask_t nohz_cpu_mask;
extern void show_state(void);
extern void show_regs(struct pt_regs *);
extern void cpu_init (void);
extern void trap_init(void);
extern void update_process_times(int user);
-extern void update_one_process(struct task_struct *p, unsigned long user,
- unsigned long system, int cpu);
extern void scheduler_tick(int user_tick, int system);
extern unsigned long cache_decay_ticks;
-extern const unsigned long scheduling_functions_start_here;
-extern const unsigned long scheduling_functions_end_here;
+/* Attach to any functions which should be ignored in wchan output. */
+#define __sched __attribute__((__section__(".sched.text")))
+/* Is this address in the __sched functions? */
+extern int in_sched_functions(unsigned long addr);
#define MAX_SCHEDULE_TIMEOUT LONG_MAX
extern signed long FASTCALL(schedule_timeout(signed long timeout));
#include <linux/aio.h>
+extern unsigned long
+arch_get_unmapped_area(struct file *, unsigned long, unsigned long,
+ unsigned long, unsigned long);
+
+extern unsigned long
+arch_get_unmapped_exec_area(struct file *, unsigned long, unsigned long,
+ unsigned long, unsigned long);
+extern unsigned long
+arch_get_unmapped_area_topdown(struct file *filp, unsigned long addr,
+ unsigned long len, unsigned long pgoff,
+ unsigned long flags);
+extern void arch_unmap_area(struct vm_area_struct *area);
+extern void arch_unmap_area_topdown(struct vm_area_struct *area);
+
+
struct mm_struct {
struct vm_area_struct * mmap; /* list of VMAs */
struct rb_root mm_rb;
struct vm_area_struct * mmap_cache; /* last find_vma result */
+ unsigned long (*get_unmapped_area) (struct file *filp,
+ unsigned long addr, unsigned long len,
+ unsigned long pgoff, unsigned long flags);
+ unsigned long (*get_unmapped_exec_area) (struct file *filp,
+ unsigned long addr, unsigned long len,
+ unsigned long pgoff, unsigned long flags);
+ void (*unmap_area) (struct vm_area_struct *area);
+ unsigned long mmap_base; /* base of mmap area */
unsigned long free_area_cache; /* first hole */
pgd_t * pgd;
atomic_t mm_users; /* How many users with user space? */
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;
- unsigned long 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[40]; /* for /proc/PID/auxv */
+ unsigned long saved_auxv[42]; /* for /proc/PID/auxv */
- unsigned dumpable:1;
-#ifdef CONFIG_HUGETLB_PAGE
- int used_hugetlb;
-#endif
+ unsigned dumpable:2;
cpumask_t cpu_vm_mask;
/* Architecture-specific MM context */
mm_context_t context;
+ struct vx_info *mm_vx_info;
+
+ /* Token based thrashing protection. */
+ unsigned long swap_token_time;
+ char recent_pagein;
/* coredumping support */
int core_waiters;
struct kioctx *ioctx_list;
struct kioctx default_kioctx;
+#ifdef CONFIG_CKRM_RES_MEM
+ struct ckrm_mem_res *memclass;
+ struct list_head tasklist; /* list of all tasks sharing this address space */
+ spinlock_t peertask_lock; /* protect above tasklist */
+#endif
};
-extern int mmlist_nr;
-
struct sighand_struct {
atomic_t count;
struct k_sigaction action[_NSIG];
*/
struct signal_struct {
atomic_t count;
+ atomic_t live;
/* current thread group signal load-balancing target: */
task_t *curr_target;
/* 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;
/* POSIX.1b Interval Timers */
struct list_head posix_timers;
int leader;
struct tty_struct *tty; /* NULL if no tty */
+
+ /*
+ * Cumulative resource counters for dead threads in the group,
+ * and for reaped dead child processes forked by this group.
+ * Live threads maintain their own counters and add to these
+ * in __exit_signal, except for the group leader.
+ */
+ unsigned long 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];
};
/*
* in the range MAX_RT_PRIO..MAX_PRIO-1. Priority values
* are inverted: lower p->prio value means higher priority.
*
- * The MAX_RT_USER_PRIO value allows the actual maximum
+ * The MAX_USER_RT_PRIO value allows the actual maximum
* RT priority to be separate from the value exported to
* user-space. This allows kernel threads to set their
* priority to a value higher than any user task. Note:
#define MAX_PRIO (MAX_RT_PRIO + 40)
-#define rt_task(p) ((p)->prio < MAX_RT_PRIO)
+#define rt_task(p) (unlikely((p)->prio < MAX_RT_PRIO))
/*
* Some day this will be a full-fledged user tracking system..
atomic_t __count; /* reference count */
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? */
+ /* protected by mq_lock */
+ 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;
+ xid_t xid;
};
-extern struct user_struct *find_user(uid_t);
+extern struct user_struct *find_user(xid_t, uid_t);
extern struct user_struct root_user;
#define INIT_USER (&root_user)
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. */
+#ifdef CONFIG_SCHEDSTATS
+struct sched_info {
+ /* cumulative counters */
+ unsigned long cpu_time, /* time spent on the cpu */
+ run_delay, /* time spent waiting on a runqueue */
+ pcnt; /* # of timeslices run on this cpu */
+
+ /* timestamps */
+ unsigned long last_arrival, /* when we last ran on a cpu */
+ last_queued; /* when we were last queued to run */
+};
+
+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);
#define NGROUPS_SMALL 32
-#define NGROUPS_PER_BLOCK ((int)(EXEC_PAGESIZE / sizeof(gid_t)))
+#define NGROUPS_PER_BLOCK ((int)(PAGE_SIZE / sizeof(gid_t)))
struct group_info {
int ngroups;
atomic_t usage;
gid_t *blocks[0];
};
+/*
+ * get_group_info() must be called with the owning task locked (via task_lock())
+ * when task != current. The reason being that the vast majority of callers are
+ * looking at current->group_info, which can not be changed except by the
+ * current task. Changing current->group_info requires the task lock, too.
+ */
#define get_group_info(group_info) do { \
atomic_inc(&(group_info)->usage); \
} while (0)
struct audit_context; /* See audit.c */
+struct mempolicy;
+
+#ifdef CONFIG_CKRM_CPU_SCHEDULE
+/**
+ * ckrm_cpu_demand_stat - used to track the cpu demand of a task/class
+ * @run: how much time it has been running since the counter started
+ * @total: total time since the counter started
+ * @last_sleep: the last time it sleeps, last_sleep = 0 when not sleeping
+ * @recalc_interval: how often do we recalculate the cpu_demand
+ * @cpu_demand: moving average of run/total
+ */
+struct ckrm_cpu_demand_stat {
+ unsigned long long run;
+ unsigned long long total;
+ unsigned long long last_sleep;
+ unsigned long long recalc_interval;
+ unsigned long cpu_demand; /*estimated cpu demand */
+};
+#endif
+
struct task_struct {
volatile long state; /* -1 unrunnable, 0 runnable, >0 stopped */
unsigned long sleep_avg;
long interactive_credit;
- unsigned long long timestamp;
+ unsigned long long timestamp, last_ran;
int activated;
unsigned long policy;
cpumask_t cpus_allowed;
unsigned int time_slice, first_time_slice;
+#ifdef CONFIG_SCHEDSTATS
+ struct sched_info sched_info;
+#endif
+
struct list_head tasks;
+ /*
+ * ptrace_list/ptrace_children forms the list of my children
+ * that were stolen by a ptracer.
+ */
struct list_head ptrace_children;
struct list_head ptrace_list;
/* task state */
struct linux_binfmt *binfmt;
+ long exit_state;
int exit_code, exit_signal;
int pdeath_signal; /* The signal sent when the parent dies */
/* ??? */
unsigned long personality;
- int did_exec:1;
+ unsigned did_exec:1;
pid_t pid;
pid_t tgid;
/*
*/
struct task_struct *real_parent; /* real parent process (when being debugged) */
struct task_struct *parent; /* parent process */
+ /*
+ * children/sibling forms the list of my children plus the
+ * tasks I'm ptracing.
+ */
struct list_head children; /* list of my children */
struct list_head sibling; /* linkage in my parent's children list */
struct task_struct *group_leader; /* threadgroup leader */
/* PID/PID hash table linkage. */
- struct pid_link pids[PIDTYPE_MAX];
+ struct pid pids[PIDTYPE_MAX];
wait_queue_head_t wait_chldexit; /* for wait4() */
struct completion *vfork_done; /* for vfork() */
unsigned long it_real_value, it_prof_value, it_virt_value;
unsigned long it_real_incr, it_prof_incr, it_virt_incr;
struct timer_list real_timer;
- unsigned long utime, stime, cutime, cstime;
- unsigned long nvcsw, nivcsw, cnvcsw, cnivcsw; /* context switch counts */
- u64 start_time;
+ unsigned long 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 */
- unsigned long min_flt, maj_flt, cmin_flt, cmaj_flt;
+ unsigned long min_flt, maj_flt;
/* process credentials */
uid_t uid,euid,suid,fsuid;
gid_t gid,egid,sgid,fsgid;
struct group_info *group_info;
kernel_cap_t cap_effective, cap_inheritable, cap_permitted;
- int keep_capabilities:1;
+ unsigned keep_capabilities:1;
struct user_struct *user;
-/* limits */
- struct rlimit rlim[RLIM_NLIMITS];
+#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
unsigned short used_math;
char comm[16];
/* file system info */
/* signal handlers */
struct signal_struct *signal;
struct sighand_struct *sighand;
-
sigset_t blocked, real_blocked;
struct sigpending pending;
int (*notifier)(void *priv);
void *notifier_data;
sigset_t *notifier_mask;
+
+ /* TUX state */
+ void *tux_info;
+ void (*tux_exit)(void);
+
void *security;
struct audit_context *audit_context;
+/* vserver context data */
+ xid_t xid;
+ struct vx_info *vx_info;
+
+/* vserver network data */
+ nid_t nid;
+ struct nx_info *nx_info;
+
/* 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;
struct io_context *io_context;
+ int ioprio;
+
unsigned long ptrace_message;
siginfo_t *last_siginfo; /* For ptrace use. */
+/*
+ * current io wait handle: wait queue entry to use for io waits
+ * If this thread is processing aio, this points at the waitqueue
+ * inside the currently handled kiocb. It may be NULL (i.e. default
+ * to a stack based synchronous wait) if its doing sync IO.
+ */
+ wait_queue_t *io_wait;
+#ifdef CONFIG_NUMA
+ struct mempolicy *mempolicy;
+ short il_next; /* could be shared with used_math */
+#endif
+
+#ifdef CONFIG_CKRM
+ spinlock_t ckrm_tsklock;
+ void *ce_data;
+#ifdef CONFIG_CKRM_TYPE_TASKCLASS
+ // .. Hubertus should change to CONFIG_CKRM_TYPE_TASKCLASS
+ struct ckrm_task_class *taskclass;
+ struct list_head taskclass_link;
+#ifdef CONFIG_CKRM_CPU_SCHEDULE
+ struct ckrm_cpu_class *cpu_class;
+ //track cpu demand of this task
+ struct ckrm_cpu_demand_stat demand_stat;
+#endif //CONFIG_CKRM_CPU_SCHEDULE
+#endif // CONFIG_CKRM_TYPE_TASKCLASS
+#ifdef CONFIG_CKRM_RES_MEM
+ struct list_head mm_peers; // list of tasks using same mm_struct
+#endif // CONFIG_CKRM_RES_MEM
+#endif // CONFIG_CKRM
+ struct task_delay_info delays;
};
static inline pid_t process_group(struct task_struct *tsk)
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 put_task_struct(tsk) \
#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_RELOCEXEC 0x00800000 /* relocate shared libraries */
+#define PF_MEMIO 0x01000000 /* I am potentially doing I/O for mem */
+#define PF_IOWAIT 0x02000000 /* I am waiting on disk I/O */
#ifdef CONFIG_SMP
extern int set_cpus_allowed(task_t *p, cpumask_t new_mask);
extern unsigned long long sched_clock(void);
-#ifdef CONFIG_NUMA
-extern void sched_balance_exec(void);
-extern void node_nr_running_init(void);
+/* sched_exec is called by processes performing an exec */
+#ifdef CONFIG_SMP
+extern void sched_exec(void);
#else
-#define sched_balance_exec() {}
-#define node_nr_running_init() {}
+#define sched_exec() {}
#endif
-/* Move tasks off this (offline) CPU onto another. */
-extern void migrate_all_tasks(void);
+extern void sched_idle_next(void);
extern void set_user_nice(task_t *p, long nice);
-extern int task_prio(task_t *p);
-extern int task_nice(task_t *p);
-extern int task_curr(task_t *p);
+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);
void yield(void);
extern struct mm_struct init_mm;
-extern struct task_struct *find_task_by_pid(int pid);
+
+#define find_task_by_real_pid(nr) \
+ find_task_by_pid_type(PIDTYPE_PID, nr)
+#define find_task_by_pid(nr) \
+ find_task_by_pid_type(PIDTYPE_PID, \
+ vx_rmap_pid(nr))
+
+extern struct task_struct *find_task_by_pid_type(int type, int pid);
extern void set_special_pids(pid_t session, pid_t pgrp);
extern void __set_special_pids(pid_t session, pid_t pgrp);
/* per-UID process charging. */
-extern struct user_struct * alloc_uid(uid_t);
+extern struct user_struct * alloc_uid(xid_t, uid_t);
+static inline struct user_struct *get_uid(struct user_struct *u)
+{
+ atomic_inc(&u->__count);
+ return u;
+}
+
extern void free_uid(struct user_struct *);
extern void switch_uid(struct user_struct *);
#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 FASTCALL(wake_up_process(struct task_struct * tsk));
+extern void FASTCALL(wake_up_new_task(struct task_struct * tsk,
+ unsigned long clone_flags));
#ifdef CONFIG_SMP
extern void kick_process(struct task_struct *tsk);
#else
static inline void kick_process(struct task_struct *tsk) { }
#endif
-extern void FASTCALL(wake_up_forked_process(struct task_struct * tsk));
extern void FASTCALL(sched_fork(task_t * p));
extern void FASTCALL(sched_exit(task_t * p));
extern void release_task(struct task_struct * p);
extern int send_sig_info(int, struct siginfo *, struct task_struct *);
extern int send_group_sig_info(int, struct siginfo *, struct task_struct *);
+extern int force_sigsegv(int, struct task_struct *);
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 notify_parent(struct task_struct *, int);
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 *);
}
#endif
+
/*
* Routines for handling mm_structs
*/
/* mmput gets rid of the mappings and all user-space */
extern void mmput(struct mm_struct *);
-/* Grab a reference to the mm if its not already going away */
-extern struct mm_struct *mmgrab(struct mm_struct *);
+/* Grab a reference to a task's mm, if it is not already going away */
+extern struct mm_struct *get_task_mm(struct task_struct *task);
/* Remove the current tasks stale references to the old mm_struct */
extern void mm_release(struct task_struct *, struct mm_struct *);
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 *);
-extern struct task_struct * copy_process(unsigned long, unsigned long, struct pt_regs *, unsigned long, int __user *, int __user *);
+task_t *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);
#define while_each_thread(g, t) \
while ((t = next_thread(t)) != g)
-extern task_t * FASTCALL(next_thread(task_t *p));
+extern task_t * FASTCALL(next_thread(const task_t *p));
#define thread_group_leader(p) (p->pid == p->tgid)
static inline int thread_group_empty(task_t *p)
{
- struct pid *pid = p->pids[PIDTYPE_TGID].pidptr;
-
- return pid->task_list.next->next == &pid->task_list;
+ return list_empty(&p->pids[PIDTYPE_TGID].pid_list);
}
#define delay_group_leader(p) \
extern void unhash_process(struct task_struct *p);
/*
- * Protects ->fs, ->files, ->mm, ->ptrace 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),
* neither inside nor outside.
{
spin_unlock(&p->alloc_lock);
}
-
-/**
- * get_task_mm - acquire a reference to the task's mm
- *
- * Returns %NULL if the task has no mm. User must release
- * the mm via mmput() after use.
- */
-static inline struct mm_struct * get_task_mm(struct task_struct * task)
-{
- struct mm_struct * mm;
-
- task_lock(task);
- mm = task->mm;
- if (mm)
- mm = mmgrab(mm);
- task_unlock(task);
- return mm;
-}
-
-
/* set thread flags in other task's structures
* - see asm/thread_info.h for TIF_xxxx flags available
*/
*/
#ifdef CONFIG_SMP
-static inline unsigned int task_cpu(struct task_struct *p)
+static inline unsigned int task_cpu(const struct task_struct *p)
{
return p->thread_info->cpu;
}
#else
-static inline unsigned int task_cpu(struct task_struct *p)
+static inline unsigned int task_cpu(const struct task_struct *p)
{
return 0;
}
#endif /* CONFIG_SMP */
+/* API for registering delay info */
+#ifdef CONFIG_DELAY_ACCT
+
+#define test_delay_flag(tsk,flg) ((tsk)->flags & (flg))
+#define set_delay_flag(tsk,flg) ((tsk)->flags |= (flg))
+#define clear_delay_flag(tsk,flg) ((tsk)->flags &= ~(flg))
+
+#define def_delay_var(var) unsigned long long var
+#define get_delay(tsk,field) ((tsk)->delays.field)
+
+#define start_delay(var) ((var) = sched_clock())
+#define start_delay_set(var,flg) (set_delay_flag(current,flg),(var) = sched_clock())
+
+#define inc_delay(tsk,field) (((tsk)->delays.field)++)
+
+/* because of hardware timer drifts in SMPs and task continue on different cpu
+ * then where the start_ts was taken there is a possibility that
+ * end_ts < start_ts by some usecs. In this case we ignore the diff
+ * and add nothing to the total.
+ */
+#ifdef CONFIG_SMP
+#define test_ts_integrity(start_ts,end_ts) (likely((end_ts) > (start_ts)))
+#else
+#define test_ts_integrity(start_ts,end_ts) (1)
+#endif
+
+#define add_delay_ts(tsk,field,start_ts,end_ts) \
+ do { if (test_ts_integrity(start_ts,end_ts)) (tsk)->delays.field += ((end_ts)-(start_ts)); } while (0)
+
+#define add_delay_clear(tsk,field,start_ts,flg) \
+ do { \
+ unsigned long long now = sched_clock();\
+ add_delay_ts(tsk,field,start_ts,now); \
+ clear_delay_flag(tsk,flg); \
+ } while (0)
+
+static inline void add_io_delay(unsigned long long dstart)
+{
+ struct task_struct * tsk = current;
+ unsigned long long now = sched_clock();
+ unsigned long long val;
+
+ if (test_ts_integrity(dstart,now))
+ val = now - dstart;
+ else
+ val = 0;
+ if (test_delay_flag(tsk,PF_MEMIO)) {
+ tsk->delays.mem_iowait_total += val;
+ tsk->delays.num_memwaits++;
+ } else {
+ tsk->delays.iowait_total += val;
+ tsk->delays.num_iowaits++;
+ }
+ clear_delay_flag(tsk,PF_IOWAIT);
+}
+
+inline static void init_delays(struct task_struct *tsk)
+{
+ memset((void*)&tsk->delays,0,sizeof(tsk->delays));
+}
+
+#else
+
+#define test_delay_flag(tsk,flg) (0)
+#define set_delay_flag(tsk,flg) do { } while (0)
+#define clear_delay_flag(tsk,flg) do { } while (0)
+
+#define def_delay_var(var)
+#define get_delay(tsk,field) (0)
+
+#define start_delay(var) do { } while (0)
+#define start_delay_set(var,flg) do { } while (0)
+
+#define inc_delay(tsk,field) do { } while (0)
+#define add_delay_ts(tsk,field,start_ts,now) do { } while (0)
+#define add_delay_clear(tsk,field,start_ts,flg) do { } while (0)
+#define add_io_delay(dstart) do { } while (0)
+#define init_delays(tsk) do { } while (0)
+#endif
+
+
+
+#ifdef HAVE_ARCH_PICK_MMAP_LAYOUT
+extern void arch_pick_mmap_layout(struct mm_struct *mm);
+#else
+static inline void arch_pick_mmap_layout(struct mm_struct *mm)
+{
+ mm->mmap_base = TASK_UNMAPPED_BASE;
+ mm->get_unmapped_area = arch_get_unmapped_area;
+ mm->unmap_area = arch_unmap_area;
+}
+#endif
+
+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
+
#endif /* __KERNEL__ */
#endif
git://git.onelab.eu / linux-2.6.git / blobdiff