7 #define CSIGNAL 0x000000ff /* signal mask to be sent at exit */
8 #define CLONE_VM 0x00000100 /* set if VM shared between processes */
9 #define CLONE_FS 0x00000200 /* set if fs info shared between processes */
10 #define CLONE_FILES 0x00000400 /* set if open files shared between processes */
11 #define CLONE_SIGHAND 0x00000800 /* set if signal handlers and blocked signals shared */
12 #define CLONE_PTRACE 0x00002000 /* set if we want to let tracing continue on the child too */
13 #define CLONE_VFORK 0x00004000 /* set if the parent wants the child to wake it up on mm_release */
14 #define CLONE_PARENT 0x00008000 /* set if we want to have the same parent as the cloner */
15 #define CLONE_THREAD 0x00010000 /* Same thread group? */
16 #define CLONE_NEWNS 0x00020000 /* New namespace group? */
17 #define CLONE_SYSVSEM 0x00040000 /* share system V SEM_UNDO semantics */
18 #define CLONE_SETTLS 0x00080000 /* create a new TLS for the child */
19 #define CLONE_PARENT_SETTID 0x00100000 /* set the TID in the parent */
20 #define CLONE_CHILD_CLEARTID 0x00200000 /* clear the TID in the child */
21 #define CLONE_DETACHED 0x00400000 /* Unused, ignored */
22 #define CLONE_UNTRACED 0x00800000 /* set if the tracing process can't force CLONE_PTRACE on this clone */
23 #define CLONE_CHILD_SETTID 0x01000000 /* set the TID in the child */
24 #define CLONE_STOPPED 0x02000000 /* Start in stopped state */
25 #define CLONE_NEWUTS 0x04000000 /* New utsname group? */
26 #define CLONE_NEWIPC 0x08000000 /* New ipcs */
27 #define CLONE_NEWUSER 0x10000000 /* New user namespace */
28 #define CLONE_NEWPID 0x20000000 /* New pid namespace */
29 #define CLONE_NEWNET 0x40000000 /* New network namespace */
30 #define CLONE_IO 0x80000000 /* Clone io context */
35 #define SCHED_NORMAL 0
39 /* SCHED_ISO: reserved but not implemented yet */
48 #include <asm/param.h> /* for HZ */
50 #include <linux/capability.h>
51 #include <linux/threads.h>
52 #include <linux/kernel.h>
53 #include <linux/types.h>
54 #include <linux/timex.h>
55 #include <linux/jiffies.h>
56 #include <linux/rbtree.h>
57 #include <linux/thread_info.h>
58 #include <linux/cpumask.h>
59 #include <linux/errno.h>
60 #include <linux/nodemask.h>
61 #include <linux/mm_types.h>
63 #include <asm/system.h>
65 #include <asm/ptrace.h>
66 #include <asm/cputime.h>
68 #include <linux/smp.h>
69 #include <linux/sem.h>
70 #include <linux/signal.h>
71 #include <linux/fs_struct.h>
72 #include <linux/compiler.h>
73 #include <linux/completion.h>
74 #include <linux/pid.h>
75 #include <linux/percpu.h>
76 #include <linux/topology.h>
77 #include <linux/proportions.h>
78 #include <linux/seccomp.h>
79 #include <linux/rcupdate.h>
80 #include <linux/rtmutex.h>
82 #include <linux/time.h>
83 #include <linux/param.h>
84 #include <linux/resource.h>
85 #include <linux/timer.h>
86 #include <linux/hrtimer.h>
87 #include <linux/task_io_accounting.h>
88 #include <linux/kobject.h>
89 #include <linux/latencytop.h>
91 #include <asm/processor.h>
95 struct futex_pi_state
;
96 struct robust_list_head
;
100 * List of flags we want to share for kernel threads,
101 * if only because they are not used by them anyway.
103 #define CLONE_KERNEL (CLONE_FS | CLONE_FILES | CLONE_SIGHAND)
106 * These are the constant used to fake the fixed-point load-average
107 * counting. Some notes:
108 * - 11 bit fractions expand to 22 bits by the multiplies: this gives
109 * a load-average precision of 10 bits integer + 11 bits fractional
110 * - if you want to count load-averages more often, you need more
111 * precision, or rounding will get you. With 2-second counting freq,
112 * the EXP_n values would be 1981, 2034 and 2043 if still using only
115 extern unsigned long avenrun
[]; /* Load averages */
117 #define FSHIFT 11 /* nr of bits of precision */
118 #define FIXED_1 (1<<FSHIFT) /* 1.0 as fixed-point */
119 #define LOAD_FREQ (5*HZ+1) /* 5 sec intervals */
120 #define EXP_1 1884 /* 1/exp(5sec/1min) as fixed-point */
121 #define EXP_5 2014 /* 1/exp(5sec/5min) */
122 #define EXP_15 2037 /* 1/exp(5sec/15min) */
124 #define CALC_LOAD(load,exp,n) \
126 load += n*(FIXED_1-exp); \
129 extern unsigned long total_forks
;
130 extern int nr_threads
;
131 DECLARE_PER_CPU(unsigned long, process_counts
);
132 extern int nr_processes(void);
133 extern unsigned long nr_running(void);
134 extern unsigned long nr_uninterruptible(void);
135 extern unsigned long nr_active(void);
136 extern unsigned long nr_iowait(void);
137 extern unsigned long weighted_cpuload(const int cpu
);
142 #ifdef CONFIG_SCHED_DEBUG
143 extern void proc_sched_show_task(struct task_struct
*p
, struct seq_file
*m
);
144 extern void proc_sched_set_task(struct task_struct
*p
);
146 print_cfs_rq(struct seq_file
*m
, int cpu
, struct cfs_rq
*cfs_rq
);
149 proc_sched_show_task(struct task_struct
*p
, struct seq_file
*m
)
152 static inline void proc_sched_set_task(struct task_struct
*p
)
156 print_cfs_rq(struct seq_file
*m
, int cpu
, struct cfs_rq
*cfs_rq
)
162 * Task state bitmask. NOTE! These bits are also
163 * encoded in fs/proc/array.c: get_task_state().
165 * We have two separate sets of flags: task->state
166 * is about runnability, while task->exit_state are
167 * about the task exiting. Confusing, but this way
168 * modifying one set can't modify the other one by
171 #define TASK_RUNNING 0
172 #define TASK_INTERRUPTIBLE 1
173 #define TASK_UNINTERRUPTIBLE 2
174 #define __TASK_STOPPED 4
175 #define __TASK_TRACED 8
176 /* in tsk->exit_state */
177 #define EXIT_ZOMBIE 16
179 /* in tsk->state again */
181 #define TASK_WAKEKILL 128
183 /* Convenience macros for the sake of set_task_state */
184 #define TASK_KILLABLE (TASK_WAKEKILL | TASK_UNINTERRUPTIBLE)
185 #define TASK_STOPPED (TASK_WAKEKILL | __TASK_STOPPED)
186 #define TASK_TRACED (TASK_WAKEKILL | __TASK_TRACED)
188 /* Convenience macros for the sake of wake_up */
189 #define TASK_NORMAL (TASK_INTERRUPTIBLE | TASK_UNINTERRUPTIBLE)
190 #define TASK_ALL (TASK_NORMAL | __TASK_STOPPED | __TASK_TRACED)
192 /* get_task_state() */
193 #define TASK_REPORT (TASK_RUNNING | TASK_INTERRUPTIBLE | \
194 TASK_UNINTERRUPTIBLE | __TASK_STOPPED | \
197 #define task_is_traced(task) ((task->state & __TASK_TRACED) != 0)
198 #define task_is_stopped(task) ((task->state & __TASK_STOPPED) != 0)
199 #define task_is_stopped_or_traced(task) \
200 ((task->state & (__TASK_STOPPED | __TASK_TRACED)) != 0)
201 #define task_contributes_to_load(task) \
202 ((task->state & TASK_UNINTERRUPTIBLE) != 0)
204 #define __set_task_state(tsk, state_value) \
205 do { (tsk)->state = (state_value); } while (0)
206 #define set_task_state(tsk, state_value) \
207 set_mb((tsk)->state, (state_value))
210 * set_current_state() includes a barrier so that the write of current->state
211 * is correctly serialised wrt the caller's subsequent test of whether to
214 * set_current_state(TASK_UNINTERRUPTIBLE);
215 * if (do_i_need_to_sleep())
218 * If the caller does not need such serialisation then use __set_current_state()
220 #define __set_current_state(state_value) \
221 do { current->state = (state_value); } while (0)
222 #define set_current_state(state_value) \
223 set_mb(current->state, (state_value))
225 /* Task command name length */
226 #define TASK_COMM_LEN 16
228 #include <linux/spinlock.h>
231 * This serializes "schedule()" and also protects
232 * the run-queue from deletions/modifications (but
233 * _adding_ to the beginning of the run-queue has
236 extern rwlock_t tasklist_lock
;
237 extern spinlock_t mmlist_lock
;
241 extern void sched_init(void);
242 extern void sched_init_smp(void);
243 extern asmlinkage
void schedule_tail(struct task_struct
*prev
);
244 extern void init_idle(struct task_struct
*idle
, int cpu
);
245 extern void init_idle_bootup_task(struct task_struct
*idle
);
247 extern cpumask_t nohz_cpu_mask
;
248 #if defined(CONFIG_SMP) && defined(CONFIG_NO_HZ)
249 extern int select_nohz_load_balancer(int cpu
);
251 static inline int select_nohz_load_balancer(int cpu
)
257 extern unsigned long rt_needs_cpu(int cpu
);
260 * Only dump TASK_* tasks. (0 for all tasks)
262 extern void show_state_filter(unsigned long state_filter
);
264 static inline void show_state(void)
266 show_state_filter(0);
269 extern void show_regs(struct pt_regs
*);
272 * TASK is a pointer to the task whose backtrace we want to see (or NULL for current
273 * task), SP is the stack pointer of the first frame that should be shown in the back
274 * trace (or NULL if the entire call-chain of the task should be shown).
276 extern void show_stack(struct task_struct
*task
, unsigned long *sp
);
278 void io_schedule(void);
279 long io_schedule_timeout(long timeout
);
281 extern void cpu_init (void);
282 extern void trap_init(void);
283 extern void account_process_tick(struct task_struct
*task
, int user
);
284 extern void update_process_times(int user
);
285 extern void scheduler_tick(void);
286 extern void hrtick_resched(void);
288 extern void sched_show_task(struct task_struct
*p
);
290 #ifdef CONFIG_DETECT_SOFTLOCKUP
291 extern void softlockup_tick(void);
292 extern void spawn_softlockup_task(void);
293 extern void touch_softlockup_watchdog(void);
294 extern void touch_all_softlockup_watchdogs(void);
295 extern unsigned long softlockup_thresh
;
296 extern unsigned long sysctl_hung_task_check_count
;
297 extern unsigned long sysctl_hung_task_timeout_secs
;
298 extern unsigned long sysctl_hung_task_warnings
;
300 static inline void softlockup_tick(void)
303 static inline void spawn_softlockup_task(void)
306 static inline void touch_softlockup_watchdog(void)
309 static inline void touch_all_softlockup_watchdogs(void)
315 /* Attach to any functions which should be ignored in wchan output. */
316 #define __sched __attribute__((__section__(".sched.text")))
318 /* Linker adds these: start and end of __sched functions */
319 extern char __sched_text_start
[], __sched_text_end
[];
321 /* Is this address in the __sched functions? */
322 extern int in_sched_functions(unsigned long addr
);
324 #define MAX_SCHEDULE_TIMEOUT LONG_MAX
325 extern signed long schedule_timeout(signed long timeout
);
326 extern signed long schedule_timeout_interruptible(signed long timeout
);
327 extern signed long schedule_timeout_killable(signed long timeout
);
328 extern signed long schedule_timeout_uninterruptible(signed long timeout
);
329 asmlinkage
void schedule(void);
332 struct user_namespace
;
334 /* Maximum number of active map areas.. This is a random (large) number */
335 #define DEFAULT_MAX_MAP_COUNT 65536
337 extern int sysctl_max_map_count
;
339 #include <linux/aio.h>
342 arch_get_unmapped_area(struct file
*, unsigned long, unsigned long,
343 unsigned long, unsigned long);
345 arch_get_unmapped_area_topdown(struct file
*filp
, unsigned long addr
,
346 unsigned long len
, unsigned long pgoff
,
347 unsigned long flags
);
348 extern void arch_unmap_area(struct mm_struct
*, unsigned long);
349 extern void arch_unmap_area_topdown(struct mm_struct
*, unsigned long);
351 #if NR_CPUS >= CONFIG_SPLIT_PTLOCK_CPUS
353 * The mm counters are not protected by its page_table_lock,
354 * so must be incremented atomically.
356 #define set_mm_counter(mm, member, value) atomic_long_set(&(mm)->_##member, value)
357 #define get_mm_counter(mm, member) ((unsigned long)atomic_long_read(&(mm)->_##member))
358 #define add_mm_counter(mm, member, value) atomic_long_add(value, &(mm)->_##member)
359 #define inc_mm_counter(mm, member) atomic_long_inc(&(mm)->_##member)
360 #define dec_mm_counter(mm, member) atomic_long_dec(&(mm)->_##member)
362 #else /* NR_CPUS < CONFIG_SPLIT_PTLOCK_CPUS */
364 * The mm counters are protected by its page_table_lock,
365 * so can be incremented directly.
367 #define set_mm_counter(mm, member, value) (mm)->_##member = (value)
368 #define get_mm_counter(mm, member) ((mm)->_##member)
369 #define add_mm_counter(mm, member, value) (mm)->_##member += (value)
370 #define inc_mm_counter(mm, member) (mm)->_##member++
371 #define dec_mm_counter(mm, member) (mm)->_##member--
373 #endif /* NR_CPUS < CONFIG_SPLIT_PTLOCK_CPUS */
375 #define get_mm_rss(mm) \
376 (get_mm_counter(mm, file_rss) + get_mm_counter(mm, anon_rss))
377 #define update_hiwater_rss(mm) do { \
378 unsigned long _rss = get_mm_rss(mm); \
379 if ((mm)->hiwater_rss < _rss) \
380 (mm)->hiwater_rss = _rss; \
382 #define update_hiwater_vm(mm) do { \
383 if ((mm)->hiwater_vm < (mm)->total_vm) \
384 (mm)->hiwater_vm = (mm)->total_vm; \
387 extern void set_dumpable(struct mm_struct
*mm
, int value
);
388 extern int get_dumpable(struct mm_struct
*mm
);
392 #define MMF_DUMPABLE 0 /* core dump is permitted */
393 #define MMF_DUMP_SECURELY 1 /* core file is readable only by root */
394 #define MMF_DUMPABLE_BITS 2
396 /* coredump filter bits */
397 #define MMF_DUMP_ANON_PRIVATE 2
398 #define MMF_DUMP_ANON_SHARED 3
399 #define MMF_DUMP_MAPPED_PRIVATE 4
400 #define MMF_DUMP_MAPPED_SHARED 5
401 #define MMF_DUMP_ELF_HEADERS 6
402 #define MMF_DUMP_FILTER_SHIFT MMF_DUMPABLE_BITS
403 #define MMF_DUMP_FILTER_BITS 5
404 #define MMF_DUMP_FILTER_MASK \
405 (((1 << MMF_DUMP_FILTER_BITS) - 1) << MMF_DUMP_FILTER_SHIFT)
406 #define MMF_DUMP_FILTER_DEFAULT \
407 ((1 << MMF_DUMP_ANON_PRIVATE) | (1 << MMF_DUMP_ANON_SHARED))
409 struct sighand_struct
{
411 struct k_sigaction action
[_NSIG
];
413 wait_queue_head_t signalfd_wqh
;
416 struct pacct_struct
{
419 unsigned long ac_mem
;
420 cputime_t ac_utime
, ac_stime
;
421 unsigned long ac_minflt
, ac_majflt
;
425 * NOTE! "signal_struct" does not have it's own
426 * locking, because a shared signal_struct always
427 * implies a shared sighand_struct, so locking
428 * sighand_struct is always a proper superset of
429 * the locking of signal_struct.
431 struct signal_struct
{
435 wait_queue_head_t wait_chldexit
; /* for wait4() */
437 /* current thread group signal load-balancing target: */
438 struct task_struct
*curr_target
;
440 /* shared signal handling: */
441 struct sigpending shared_pending
;
443 /* thread group exit support */
446 * - notify group_exit_task when ->count is equal to notify_count
447 * - everyone except group_exit_task is stopped during signal delivery
448 * of fatal signals, group_exit_task processes the signal.
450 struct task_struct
*group_exit_task
;
453 /* thread group stop support, overloads group_exit_code too */
454 int group_stop_count
;
455 unsigned int flags
; /* see SIGNAL_* flags below */
457 /* POSIX.1b Interval Timers */
458 struct list_head posix_timers
;
460 /* ITIMER_REAL timer for the process */
461 struct hrtimer real_timer
;
462 struct pid
*leader_pid
;
463 ktime_t it_real_incr
;
465 /* ITIMER_PROF and ITIMER_VIRTUAL timers for the process */
466 cputime_t it_prof_expires
, it_virt_expires
;
467 cputime_t it_prof_incr
, it_virt_incr
;
469 /* job control IDs */
472 * pgrp and session fields are deprecated.
473 * use the task_session_Xnr and task_pgrp_Xnr routines below
477 pid_t pgrp __deprecated
;
481 struct pid
*tty_old_pgrp
;
484 pid_t session __deprecated
;
488 /* boolean value for session group leader */
491 struct tty_struct
*tty
; /* NULL if no tty */
494 * Cumulative resource counters for dead threads in the group,
495 * and for reaped dead child processes forked by this group.
496 * Live threads maintain their own counters and add to these
497 * in __exit_signal, except for the group leader.
499 cputime_t utime
, stime
, cutime
, cstime
;
502 unsigned long nvcsw
, nivcsw
, cnvcsw
, cnivcsw
;
503 unsigned long min_flt
, maj_flt
, cmin_flt
, cmaj_flt
;
504 unsigned long inblock
, oublock
, cinblock
, coublock
;
507 * Cumulative ns of scheduled CPU time for dead threads in the
508 * group, not including a zombie group leader. (This only differs
509 * from jiffies_to_ns(utime + stime) if sched_clock uses something
510 * other than jiffies.)
512 unsigned long long sum_sched_runtime
;
515 * We don't bother to synchronize most readers of this at all,
516 * because there is no reader checking a limit that actually needs
517 * to get both rlim_cur and rlim_max atomically, and either one
518 * alone is a single word that can safely be read normally.
519 * getrlimit/setrlimit use task_lock(current->group_leader) to
520 * protect this instead of the siglock, because they really
521 * have no need to disable irqs.
523 struct rlimit rlim
[RLIM_NLIMITS
];
525 struct list_head cpu_timers
[3];
527 /* keep the process-shared keyrings here so that they do the right
528 * thing in threads created with CLONE_THREAD */
530 struct key
*session_keyring
; /* keyring inherited over fork */
531 struct key
*process_keyring
; /* keyring private to this process */
533 #ifdef CONFIG_BSD_PROCESS_ACCT
534 struct pacct_struct pacct
; /* per-process accounting information */
536 #ifdef CONFIG_TASKSTATS
537 struct taskstats
*stats
;
541 struct tty_audit_buf
*tty_audit_buf
;
545 /* Context switch must be unlocked if interrupts are to be enabled */
546 #ifdef __ARCH_WANT_INTERRUPTS_ON_CTXSW
547 # define __ARCH_WANT_UNLOCKED_CTXSW
551 * Bits in flags field of signal_struct.
553 #define SIGNAL_STOP_STOPPED 0x00000001 /* job control stop in effect */
554 #define SIGNAL_STOP_DEQUEUED 0x00000002 /* stop signal dequeued */
555 #define SIGNAL_STOP_CONTINUED 0x00000004 /* SIGCONT since WCONTINUED reap */
556 #define SIGNAL_GROUP_EXIT 0x00000008 /* group exit in progress */
558 * Pending notifications to parent.
560 #define SIGNAL_CLD_STOPPED 0x00000010
561 #define SIGNAL_CLD_CONTINUED 0x00000020
562 #define SIGNAL_CLD_MASK (SIGNAL_CLD_STOPPED|SIGNAL_CLD_CONTINUED)
564 #define SIGNAL_UNKILLABLE 0x00000040 /* for init: ignore fatal signals */
566 /* If true, all threads except ->group_exit_task have pending SIGKILL */
567 static inline int signal_group_exit(const struct signal_struct
*sig
)
569 return (sig
->flags
& SIGNAL_GROUP_EXIT
) ||
570 (sig
->group_exit_task
!= NULL
);
574 * Some day this will be a full-fledged user tracking system..
577 atomic_t __count
; /* reference count */
578 atomic_t processes
; /* How many processes does this user have? */
579 atomic_t files
; /* How many open files does this user have? */
580 atomic_t sigpending
; /* How many pending signals does this user have? */
581 #ifdef CONFIG_INOTIFY_USER
582 atomic_t inotify_watches
; /* How many inotify watches does this user have? */
583 atomic_t inotify_devs
; /* How many inotify devs does this user have opened? */
585 #ifdef CONFIG_POSIX_MQUEUE
586 /* protected by mq_lock */
587 unsigned long mq_bytes
; /* How many bytes can be allocated to mqueue? */
589 unsigned long locked_shm
; /* How many pages of mlocked shm ? */
592 struct key
*uid_keyring
; /* UID specific keyring */
593 struct key
*session_keyring
; /* UID's default session keyring */
596 /* Hash table maintenance information */
597 struct hlist_node uidhash_node
;
600 #ifdef CONFIG_USER_SCHED
601 struct task_group
*tg
;
604 struct work_struct work
;
609 extern int uids_sysfs_init(void);
611 extern struct user_struct
*find_user(uid_t
);
613 extern struct user_struct root_user
;
614 #define INIT_USER (&root_user)
616 struct backing_dev_info
;
617 struct reclaim_state
;
619 #if defined(CONFIG_SCHEDSTATS) || defined(CONFIG_TASK_DELAY_ACCT)
621 /* cumulative counters */
622 unsigned long pcount
; /* # of times run on this cpu */
623 unsigned long long cpu_time
, /* time spent on the cpu */
624 run_delay
; /* time spent waiting on a runqueue */
627 unsigned long long last_arrival
,/* when we last ran on a cpu */
628 last_queued
; /* when we were last queued to run */
629 #ifdef CONFIG_SCHEDSTATS
631 unsigned int bkl_count
;
634 #endif /* defined(CONFIG_SCHEDSTATS) || defined(CONFIG_TASK_DELAY_ACCT) */
636 #ifdef CONFIG_SCHEDSTATS
637 extern const struct file_operations proc_schedstat_operations
;
638 #endif /* CONFIG_SCHEDSTATS */
640 #ifdef CONFIG_TASK_DELAY_ACCT
641 struct task_delay_info
{
643 unsigned int flags
; /* Private per-task flags */
645 /* For each stat XXX, add following, aligned appropriately
647 * struct timespec XXX_start, XXX_end;
651 * Atomicity of updates to XXX_delay, XXX_count protected by
652 * single lock above (split into XXX_lock if contention is an issue).
656 * XXX_count is incremented on every XXX operation, the delay
657 * associated with the operation is added to XXX_delay.
658 * XXX_delay contains the accumulated delay time in nanoseconds.
660 struct timespec blkio_start
, blkio_end
; /* Shared by blkio, swapin */
661 u64 blkio_delay
; /* wait for sync block io completion */
662 u64 swapin_delay
; /* wait for swapin block io completion */
663 u32 blkio_count
; /* total count of the number of sync block */
664 /* io operations performed */
665 u32 swapin_count
; /* total count of the number of swapin block */
666 /* io operations performed */
668 #endif /* CONFIG_TASK_DELAY_ACCT */
670 static inline int sched_info_on(void)
672 #ifdef CONFIG_SCHEDSTATS
674 #elif defined(CONFIG_TASK_DELAY_ACCT)
675 extern int delayacct_on
;
690 * sched-domains (multiprocessor balancing) declarations:
694 * Increase resolution of nice-level calculations:
696 #define SCHED_LOAD_SHIFT 10
697 #define SCHED_LOAD_SCALE (1L << SCHED_LOAD_SHIFT)
699 #define SCHED_LOAD_SCALE_FUZZ SCHED_LOAD_SCALE
702 #define SD_LOAD_BALANCE 1 /* Do load balancing on this domain. */
703 #define SD_BALANCE_NEWIDLE 2 /* Balance when about to become idle */
704 #define SD_BALANCE_EXEC 4 /* Balance on exec */
705 #define SD_BALANCE_FORK 8 /* Balance on fork, clone */
706 #define SD_WAKE_IDLE 16 /* Wake to idle CPU on task wakeup */
707 #define SD_WAKE_AFFINE 32 /* Wake task to waking CPU */
708 #define SD_WAKE_BALANCE 64 /* Perform balancing at task wakeup */
709 #define SD_SHARE_CPUPOWER 128 /* Domain members share cpu power */
710 #define SD_POWERSAVINGS_BALANCE 256 /* Balance for power savings */
711 #define SD_SHARE_PKG_RESOURCES 512 /* Domain members share cpu pkg resources */
712 #define SD_SERIALIZE 1024 /* Only a single load balancing instance */
713 #define SD_WAKE_IDLE_FAR 2048 /* Gain latency sacrificing cache hit */
715 #define BALANCE_FOR_MC_POWER \
716 (sched_smt_power_savings ? SD_POWERSAVINGS_BALANCE : 0)
718 #define BALANCE_FOR_PKG_POWER \
719 ((sched_mc_power_savings || sched_smt_power_savings) ? \
720 SD_POWERSAVINGS_BALANCE : 0)
722 #define test_sd_parent(sd, flag) ((sd->parent && \
723 (sd->parent->flags & flag)) ? 1 : 0)
727 struct sched_group
*next
; /* Must be a circular list */
731 * CPU power of this group, SCHED_LOAD_SCALE being max power for a
732 * single CPU. This is read only (except for setup, hotplug CPU).
733 * Note : Never change cpu_power without recompute its reciprocal
735 unsigned int __cpu_power
;
737 * reciprocal value of cpu_power to avoid expensive divides
738 * (see include/linux/reciprocal_div.h)
740 u32 reciprocal_cpu_power
;
743 enum sched_domain_level
{
753 struct sched_domain_attr
{
754 int relax_domain_level
;
757 #define SD_ATTR_INIT (struct sched_domain_attr) { \
758 .relax_domain_level = -1, \
761 struct sched_domain
{
762 /* These fields must be setup */
763 struct sched_domain
*parent
; /* top domain must be null terminated */
764 struct sched_domain
*child
; /* bottom domain must be null terminated */
765 struct sched_group
*groups
; /* the balancing groups of the domain */
766 cpumask_t span
; /* span of all CPUs in this domain */
767 int first_cpu
; /* cache of the first cpu in this domain */
768 unsigned long min_interval
; /* Minimum balance interval ms */
769 unsigned long max_interval
; /* Maximum balance interval ms */
770 unsigned int busy_factor
; /* less balancing by factor if busy */
771 unsigned int imbalance_pct
; /* No balance until over watermark */
772 unsigned int cache_nice_tries
; /* Leave cache hot tasks for # tries */
773 unsigned int busy_idx
;
774 unsigned int idle_idx
;
775 unsigned int newidle_idx
;
776 unsigned int wake_idx
;
777 unsigned int forkexec_idx
;
778 int flags
; /* See SD_* */
779 enum sched_domain_level level
;
781 /* Runtime fields. */
782 unsigned long last_balance
; /* init to jiffies. units in jiffies */
783 unsigned int balance_interval
; /* initialise to 1. units in ms. */
784 unsigned int nr_balance_failed
; /* initialise to 0 */
786 #ifdef CONFIG_SCHEDSTATS
787 /* load_balance() stats */
788 unsigned int lb_count
[CPU_MAX_IDLE_TYPES
];
789 unsigned int lb_failed
[CPU_MAX_IDLE_TYPES
];
790 unsigned int lb_balanced
[CPU_MAX_IDLE_TYPES
];
791 unsigned int lb_imbalance
[CPU_MAX_IDLE_TYPES
];
792 unsigned int lb_gained
[CPU_MAX_IDLE_TYPES
];
793 unsigned int lb_hot_gained
[CPU_MAX_IDLE_TYPES
];
794 unsigned int lb_nobusyg
[CPU_MAX_IDLE_TYPES
];
795 unsigned int lb_nobusyq
[CPU_MAX_IDLE_TYPES
];
797 /* Active load balancing */
798 unsigned int alb_count
;
799 unsigned int alb_failed
;
800 unsigned int alb_pushed
;
802 /* SD_BALANCE_EXEC stats */
803 unsigned int sbe_count
;
804 unsigned int sbe_balanced
;
805 unsigned int sbe_pushed
;
807 /* SD_BALANCE_FORK stats */
808 unsigned int sbf_count
;
809 unsigned int sbf_balanced
;
810 unsigned int sbf_pushed
;
812 /* try_to_wake_up() stats */
813 unsigned int ttwu_wake_remote
;
814 unsigned int ttwu_move_affine
;
815 unsigned int ttwu_move_balance
;
819 extern void partition_sched_domains(int ndoms_new
, cpumask_t
*doms_new
,
820 struct sched_domain_attr
*dattr_new
);
821 extern int arch_reinit_sched_domains(void);
823 #endif /* CONFIG_SMP */
826 * A runqueue laden with a single nice 0 task scores a weighted_cpuload of
827 * SCHED_LOAD_SCALE. This function returns 1 if any cpu is laden with a
828 * task of nice 0 or enough lower priority tasks to bring up the
831 static inline int above_background_load(void)
835 for_each_online_cpu(cpu
) {
836 if (weighted_cpuload(cpu
) >= SCHED_LOAD_SCALE
)
842 struct io_context
; /* See blkdev.h */
843 #define NGROUPS_SMALL 32
844 #define NGROUPS_PER_BLOCK ((unsigned int)(PAGE_SIZE / sizeof(gid_t)))
848 gid_t small_block
[NGROUPS_SMALL
];
854 * get_group_info() must be called with the owning task locked (via task_lock())
855 * when task != current. The reason being that the vast majority of callers are
856 * looking at current->group_info, which can not be changed except by the
857 * current task. Changing current->group_info requires the task lock, too.
859 #define get_group_info(group_info) do { \
860 atomic_inc(&(group_info)->usage); \
863 #define put_group_info(group_info) do { \
864 if (atomic_dec_and_test(&(group_info)->usage)) \
865 groups_free(group_info); \
868 extern struct group_info
*groups_alloc(int gidsetsize
);
869 extern void groups_free(struct group_info
*group_info
);
870 extern int set_current_groups(struct group_info
*group_info
);
871 extern int groups_search(struct group_info
*group_info
, gid_t grp
);
872 /* access the groups "array" with this macro */
873 #define GROUP_AT(gi, i) \
874 ((gi)->blocks[(i)/NGROUPS_PER_BLOCK][(i)%NGROUPS_PER_BLOCK])
876 #ifdef ARCH_HAS_PREFETCH_SWITCH_STACK
877 extern void prefetch_stack(struct task_struct
*t
);
879 static inline void prefetch_stack(struct task_struct
*t
) { }
882 struct audit_context
; /* See audit.c */
884 struct pipe_inode_info
;
885 struct uts_namespace
;
891 const struct sched_class
*next
;
893 void (*enqueue_task
) (struct rq
*rq
, struct task_struct
*p
, int wakeup
);
894 void (*dequeue_task
) (struct rq
*rq
, struct task_struct
*p
, int sleep
);
895 void (*yield_task
) (struct rq
*rq
);
896 int (*select_task_rq
)(struct task_struct
*p
, int sync
);
898 void (*check_preempt_curr
) (struct rq
*rq
, struct task_struct
*p
);
900 struct task_struct
* (*pick_next_task
) (struct rq
*rq
);
901 void (*put_prev_task
) (struct rq
*rq
, struct task_struct
*p
);
904 unsigned long (*load_balance
) (struct rq
*this_rq
, int this_cpu
,
905 struct rq
*busiest
, unsigned long max_load_move
,
906 struct sched_domain
*sd
, enum cpu_idle_type idle
,
907 int *all_pinned
, int *this_best_prio
);
909 int (*move_one_task
) (struct rq
*this_rq
, int this_cpu
,
910 struct rq
*busiest
, struct sched_domain
*sd
,
911 enum cpu_idle_type idle
);
912 void (*pre_schedule
) (struct rq
*this_rq
, struct task_struct
*task
);
913 void (*post_schedule
) (struct rq
*this_rq
);
914 void (*task_wake_up
) (struct rq
*this_rq
, struct task_struct
*task
);
917 void (*set_curr_task
) (struct rq
*rq
);
918 void (*task_tick
) (struct rq
*rq
, struct task_struct
*p
, int queued
);
919 void (*task_new
) (struct rq
*rq
, struct task_struct
*p
);
920 void (*set_cpus_allowed
)(struct task_struct
*p
,
921 const cpumask_t
*newmask
);
923 void (*join_domain
)(struct rq
*rq
);
924 void (*leave_domain
)(struct rq
*rq
);
926 void (*switched_from
) (struct rq
*this_rq
, struct task_struct
*task
,
928 void (*switched_to
) (struct rq
*this_rq
, struct task_struct
*task
,
930 void (*prio_changed
) (struct rq
*this_rq
, struct task_struct
*task
,
931 int oldprio
, int running
);
933 #ifdef CONFIG_FAIR_GROUP_SCHED
934 void (*moved_group
) (struct task_struct
*p
);
939 unsigned long weight
, inv_weight
;
943 * CFS stats for a schedulable entity (task, task-group etc)
945 * Current field usage histogram:
952 struct sched_entity
{
953 struct load_weight load
; /* for load-balancing */
954 struct rb_node run_node
;
955 struct list_head group_node
;
959 u64 sum_exec_runtime
;
961 u64 prev_sum_exec_runtime
;
966 #ifdef CONFIG_SCHEDSTATS
974 s64 sum_sleep_runtime
;
982 u64 nr_migrations_cold
;
983 u64 nr_failed_migrations_affine
;
984 u64 nr_failed_migrations_running
;
985 u64 nr_failed_migrations_hot
;
986 u64 nr_forced_migrations
;
987 u64 nr_forced2_migrations
;
991 u64 nr_wakeups_migrate
;
992 u64 nr_wakeups_local
;
993 u64 nr_wakeups_remote
;
994 u64 nr_wakeups_affine
;
995 u64 nr_wakeups_affine_attempts
;
996 u64 nr_wakeups_passive
;
1000 #ifdef CONFIG_FAIR_GROUP_SCHED
1001 struct sched_entity
*parent
;
1002 /* rq on which this entity is (to be) queued: */
1003 struct cfs_rq
*cfs_rq
;
1004 /* rq "owned" by this entity/group: */
1005 struct cfs_rq
*my_q
;
1009 struct sched_rt_entity
{
1010 struct list_head run_list
;
1011 unsigned int time_slice
;
1012 unsigned long timeout
;
1013 int nr_cpus_allowed
;
1015 struct sched_rt_entity
*back
;
1016 #ifdef CONFIG_RT_GROUP_SCHED
1017 struct sched_rt_entity
*parent
;
1018 /* rq on which this entity is (to be) queued: */
1019 struct rt_rq
*rt_rq
;
1020 /* rq "owned" by this entity/group: */
1025 struct task_struct
{
1026 volatile long state
; /* -1 unrunnable, 0 runnable, >0 stopped */
1029 unsigned int flags
; /* per process flags, defined below */
1030 unsigned int ptrace
;
1032 int lock_depth
; /* BKL lock depth */
1035 #ifdef __ARCH_WANT_UNLOCKED_CTXSW
1040 int prio
, static_prio
, normal_prio
;
1041 const struct sched_class
*sched_class
;
1042 struct sched_entity se
;
1043 struct sched_rt_entity rt
;
1045 #ifdef CONFIG_PREEMPT_NOTIFIERS
1046 /* list of struct preempt_notifier: */
1047 struct hlist_head preempt_notifiers
;
1051 * fpu_counter contains the number of consecutive context switches
1052 * that the FPU is used. If this is over a threshold, the lazy fpu
1053 * saving becomes unlazy to save the trap. This is an unsigned char
1054 * so that after 256 times the counter wraps and the behavior turns
1055 * lazy again; this to deal with bursty apps that only use FPU for
1058 unsigned char fpu_counter
;
1059 s8 oomkilladj
; /* OOM kill score adjustment (bit shift). */
1060 #ifdef CONFIG_BLK_DEV_IO_TRACE
1061 unsigned int btrace_seq
;
1064 unsigned int policy
;
1065 cpumask_t cpus_allowed
;
1067 #ifdef CONFIG_PREEMPT_RCU
1068 int rcu_read_lock_nesting
;
1069 int rcu_flipctr_idx
;
1070 #endif /* #ifdef CONFIG_PREEMPT_RCU */
1072 #if defined(CONFIG_SCHEDSTATS) || defined(CONFIG_TASK_DELAY_ACCT)
1073 struct sched_info sched_info
;
1076 struct list_head tasks
;
1078 * ptrace_list/ptrace_children forms the list of my children
1079 * that were stolen by a ptracer.
1081 struct list_head ptrace_children
;
1082 struct list_head ptrace_list
;
1084 struct mm_struct
*mm
, *active_mm
;
1087 struct linux_binfmt
*binfmt
;
1089 int exit_code
, exit_signal
;
1090 int pdeath_signal
; /* The signal sent when the parent dies */
1092 unsigned int personality
;
1093 unsigned did_exec
:1;
1097 #ifdef CONFIG_CC_STACKPROTECTOR
1098 /* Canary value for the -fstack-protector gcc feature */
1099 unsigned long stack_canary
;
1102 * pointers to (original) parent process, youngest child, younger sibling,
1103 * older sibling, respectively. (p->father can be replaced with
1106 struct task_struct
*real_parent
; /* real parent process (when being debugged) */
1107 struct task_struct
*parent
; /* parent process */
1109 * children/sibling forms the list of my children plus the
1110 * tasks I'm ptracing.
1112 struct list_head children
; /* list of my children */
1113 struct list_head sibling
; /* linkage in my parent's children list */
1114 struct task_struct
*group_leader
; /* threadgroup leader */
1116 /* PID/PID hash table linkage. */
1117 struct pid_link pids
[PIDTYPE_MAX
];
1118 struct list_head thread_group
;
1120 struct completion
*vfork_done
; /* for vfork() */
1121 int __user
*set_child_tid
; /* CLONE_CHILD_SETTID */
1122 int __user
*clear_child_tid
; /* CLONE_CHILD_CLEARTID */
1124 unsigned int rt_priority
;
1125 cputime_t utime
, stime
, utimescaled
, stimescaled
;
1127 cputime_t prev_utime
, prev_stime
;
1128 unsigned long nvcsw
, nivcsw
; /* context switch counts */
1129 struct timespec start_time
; /* monotonic time */
1130 struct timespec real_start_time
; /* boot based time */
1131 /* mm fault and swap info: this can arguably be seen as either mm-specific or thread-specific */
1132 unsigned long min_flt
, maj_flt
;
1134 cputime_t it_prof_expires
, it_virt_expires
;
1135 unsigned long long it_sched_expires
;
1136 struct list_head cpu_timers
[3];
1138 /* process credentials */
1139 uid_t uid
,euid
,suid
,fsuid
;
1140 gid_t gid
,egid
,sgid
,fsgid
;
1141 struct group_info
*group_info
;
1142 kernel_cap_t cap_effective
, cap_inheritable
, cap_permitted
, cap_bset
;
1143 unsigned securebits
;
1144 struct user_struct
*user
;
1146 struct key
*request_key_auth
; /* assumed request_key authority */
1147 struct key
*thread_keyring
; /* keyring private to this thread */
1148 unsigned char jit_keyring
; /* default keyring to attach requested keys to */
1150 char comm
[TASK_COMM_LEN
]; /* executable name excluding path
1151 - access with [gs]et_task_comm (which lock
1152 it with task_lock())
1153 - initialized normally by flush_old_exec */
1154 /* file system info */
1155 int link_count
, total_link_count
;
1156 #ifdef CONFIG_SYSVIPC
1158 struct sysv_sem sysvsem
;
1160 #ifdef CONFIG_DETECT_SOFTLOCKUP
1161 /* hung task detection */
1162 unsigned long last_switch_timestamp
;
1163 unsigned long last_switch_count
;
1165 /* CPU-specific state of this task */
1166 struct thread_struct thread
;
1167 /* filesystem information */
1168 struct fs_struct
*fs
;
1169 /* open file information */
1170 struct files_struct
*files
;
1172 struct nsproxy
*nsproxy
;
1173 /* signal handlers */
1174 struct signal_struct
*signal
;
1175 struct sighand_struct
*sighand
;
1177 sigset_t blocked
, real_blocked
;
1178 sigset_t saved_sigmask
; /* restored if set_restore_sigmask() was used */
1179 struct sigpending pending
;
1181 unsigned long sas_ss_sp
;
1183 int (*notifier
)(void *priv
);
1184 void *notifier_data
;
1185 sigset_t
*notifier_mask
;
1186 #ifdef CONFIG_SECURITY
1189 struct audit_context
*audit_context
;
1190 #ifdef CONFIG_AUDITSYSCALL
1192 unsigned int sessionid
;
1196 /* Thread group tracking */
1199 /* Protection of (de-)allocation: mm, files, fs, tty, keyrings */
1200 spinlock_t alloc_lock
;
1202 /* Protection of the PI data structures: */
1205 #ifdef CONFIG_RT_MUTEXES
1206 /* PI waiters blocked on a rt_mutex held by this task */
1207 struct plist_head pi_waiters
;
1208 /* Deadlock detection and priority inheritance handling */
1209 struct rt_mutex_waiter
*pi_blocked_on
;
1212 #ifdef CONFIG_DEBUG_MUTEXES
1213 /* mutex deadlock detection */
1214 struct mutex_waiter
*blocked_on
;
1216 #ifdef CONFIG_TRACE_IRQFLAGS
1217 unsigned int irq_events
;
1218 int hardirqs_enabled
;
1219 unsigned long hardirq_enable_ip
;
1220 unsigned int hardirq_enable_event
;
1221 unsigned long hardirq_disable_ip
;
1222 unsigned int hardirq_disable_event
;
1223 int softirqs_enabled
;
1224 unsigned long softirq_disable_ip
;
1225 unsigned int softirq_disable_event
;
1226 unsigned long softirq_enable_ip
;
1227 unsigned int softirq_enable_event
;
1228 int hardirq_context
;
1229 int softirq_context
;
1231 #ifdef CONFIG_LOCKDEP
1232 # define MAX_LOCK_DEPTH 48UL
1235 struct held_lock held_locks
[MAX_LOCK_DEPTH
];
1236 unsigned int lockdep_recursion
;
1239 /* journalling filesystem info */
1242 /* stacked block device info */
1243 struct bio
*bio_list
, **bio_tail
;
1246 struct reclaim_state
*reclaim_state
;
1248 struct backing_dev_info
*backing_dev_info
;
1250 struct io_context
*io_context
;
1252 unsigned long ptrace_message
;
1253 siginfo_t
*last_siginfo
; /* For ptrace use. */
1254 #ifdef CONFIG_TASK_XACCT
1255 /* i/o counters(bytes read/written, #syscalls */
1256 u64 rchar
, wchar
, syscr
, syscw
;
1258 struct task_io_accounting ioac
;
1259 #if defined(CONFIG_TASK_XACCT)
1260 u64 acct_rss_mem1
; /* accumulated rss usage */
1261 u64 acct_vm_mem1
; /* accumulated virtual memory usage */
1262 cputime_t acct_stimexpd
;/* stime since last update */
1265 struct mempolicy
*mempolicy
;
1268 #ifdef CONFIG_CPUSETS
1269 nodemask_t mems_allowed
;
1270 int cpuset_mems_generation
;
1271 int cpuset_mem_spread_rotor
;
1273 #ifdef CONFIG_CGROUPS
1274 /* Control Group info protected by css_set_lock */
1275 struct css_set
*cgroups
;
1276 /* cg_list protected by css_set_lock and tsk->alloc_lock */
1277 struct list_head cg_list
;
1280 struct robust_list_head __user
*robust_list
;
1281 #ifdef CONFIG_COMPAT
1282 struct compat_robust_list_head __user
*compat_robust_list
;
1284 struct list_head pi_state_list
;
1285 struct futex_pi_state
*pi_state_cache
;
1287 atomic_t fs_excl
; /* holding fs exclusive resources */
1288 struct rcu_head rcu
;
1291 * cache last used pipe for splice
1293 struct pipe_inode_info
*splice_pipe
;
1294 #ifdef CONFIG_TASK_DELAY_ACCT
1295 struct task_delay_info
*delays
;
1297 #ifdef CONFIG_FAULT_INJECTION
1300 struct prop_local_single dirties
;
1301 #ifdef CONFIG_LATENCYTOP
1302 int latency_record_count
;
1303 struct latency_record latency_record
[LT_SAVECOUNT
];
1308 * Priority of a process goes from 0..MAX_PRIO-1, valid RT
1309 * priority is 0..MAX_RT_PRIO-1, and SCHED_NORMAL/SCHED_BATCH
1310 * tasks are in the range MAX_RT_PRIO..MAX_PRIO-1. Priority
1311 * values are inverted: lower p->prio value means higher priority.
1313 * The MAX_USER_RT_PRIO value allows the actual maximum
1314 * RT priority to be separate from the value exported to
1315 * user-space. This allows kernel threads to set their
1316 * priority to a value higher than any user task. Note:
1317 * MAX_RT_PRIO must not be smaller than MAX_USER_RT_PRIO.
1320 #define MAX_USER_RT_PRIO 100
1321 #define MAX_RT_PRIO MAX_USER_RT_PRIO
1323 #define MAX_PRIO (MAX_RT_PRIO + 40)
1324 #define DEFAULT_PRIO (MAX_RT_PRIO + 20)
1326 static inline int rt_prio(int prio
)
1328 if (unlikely(prio
< MAX_RT_PRIO
))
1333 static inline int rt_task(struct task_struct
*p
)
1335 return rt_prio(p
->prio
);
1338 static inline void set_task_session(struct task_struct
*tsk
, pid_t session
)
1340 tsk
->signal
->__session
= session
;
1343 static inline void set_task_pgrp(struct task_struct
*tsk
, pid_t pgrp
)
1345 tsk
->signal
->__pgrp
= pgrp
;
1348 static inline struct pid
*task_pid(struct task_struct
*task
)
1350 return task
->pids
[PIDTYPE_PID
].pid
;
1353 static inline struct pid
*task_tgid(struct task_struct
*task
)
1355 return task
->group_leader
->pids
[PIDTYPE_PID
].pid
;
1358 static inline struct pid
*task_pgrp(struct task_struct
*task
)
1360 return task
->group_leader
->pids
[PIDTYPE_PGID
].pid
;
1363 static inline struct pid
*task_session(struct task_struct
*task
)
1365 return task
->group_leader
->pids
[PIDTYPE_SID
].pid
;
1368 struct pid_namespace
;
1371 * the helpers to get the task's different pids as they are seen
1372 * from various namespaces
1374 * task_xid_nr() : global id, i.e. the id seen from the init namespace;
1375 * task_xid_vnr() : virtual id, i.e. the id seen from the pid namespace of
1377 * task_xid_nr_ns() : id seen from the ns specified;
1379 * set_task_vxid() : assigns a virtual id to a task;
1381 * see also pid_nr() etc in include/linux/pid.h
1384 static inline pid_t
task_pid_nr(struct task_struct
*tsk
)
1389 pid_t
task_pid_nr_ns(struct task_struct
*tsk
, struct pid_namespace
*ns
);
1391 static inline pid_t
task_pid_vnr(struct task_struct
*tsk
)
1393 return pid_vnr(task_pid(tsk
));
1397 static inline pid_t
task_tgid_nr(struct task_struct
*tsk
)
1402 pid_t
task_tgid_nr_ns(struct task_struct
*tsk
, struct pid_namespace
*ns
);
1404 static inline pid_t
task_tgid_vnr(struct task_struct
*tsk
)
1406 return pid_vnr(task_tgid(tsk
));
1410 static inline pid_t
task_pgrp_nr(struct task_struct
*tsk
)
1412 return tsk
->signal
->__pgrp
;
1415 pid_t
task_pgrp_nr_ns(struct task_struct
*tsk
, struct pid_namespace
*ns
);
1417 static inline pid_t
task_pgrp_vnr(struct task_struct
*tsk
)
1419 return pid_vnr(task_pgrp(tsk
));
1423 static inline pid_t
task_session_nr(struct task_struct
*tsk
)
1425 return tsk
->signal
->__session
;
1428 pid_t
task_session_nr_ns(struct task_struct
*tsk
, struct pid_namespace
*ns
);
1430 static inline pid_t
task_session_vnr(struct task_struct
*tsk
)
1432 return pid_vnr(task_session(tsk
));
1437 * pid_alive - check that a task structure is not stale
1438 * @p: Task structure to be checked.
1440 * Test if a process is not yet dead (at most zombie state)
1441 * If pid_alive fails, then pointers within the task structure
1442 * can be stale and must not be dereferenced.
1444 static inline int pid_alive(struct task_struct
*p
)
1446 return p
->pids
[PIDTYPE_PID
].pid
!= NULL
;
1450 * is_global_init - check if a task structure is init
1451 * @tsk: Task structure to be checked.
1453 * Check if a task structure is the first user space task the kernel created.
1455 static inline int is_global_init(struct task_struct
*tsk
)
1457 return tsk
->pid
== 1;
1461 * is_container_init:
1462 * check whether in the task is init in its own pid namespace.
1464 extern int is_container_init(struct task_struct
*tsk
);
1466 extern struct pid
*cad_pid
;
1468 extern void free_task(struct task_struct
*tsk
);
1469 #define get_task_struct(tsk) do { atomic_inc(&(tsk)->usage); } while(0)
1471 extern void __put_task_struct(struct task_struct
*t
);
1473 static inline void put_task_struct(struct task_struct
*t
)
1475 if (atomic_dec_and_test(&t
->usage
))
1476 __put_task_struct(t
);
1482 #define PF_ALIGNWARN 0x00000001 /* Print alignment warning msgs */
1483 /* Not implemented yet, only for 486*/
1484 #define PF_STARTING 0x00000002 /* being created */
1485 #define PF_EXITING 0x00000004 /* getting shut down */
1486 #define PF_EXITPIDONE 0x00000008 /* pi exit done on shut down */
1487 #define PF_VCPU 0x00000010 /* I'm a virtual CPU */
1488 #define PF_FORKNOEXEC 0x00000040 /* forked but didn't exec */
1489 #define PF_SUPERPRIV 0x00000100 /* used super-user privileges */
1490 #define PF_DUMPCORE 0x00000200 /* dumped core */
1491 #define PF_SIGNALED 0x00000400 /* killed by a signal */
1492 #define PF_MEMALLOC 0x00000800 /* Allocating memory */
1493 #define PF_FLUSHER 0x00001000 /* responsible for disk writeback */
1494 #define PF_USED_MATH 0x00002000 /* if unset the fpu must be initialized before use */
1495 #define PF_NOFREEZE 0x00008000 /* this thread should not be frozen */
1496 #define PF_FROZEN 0x00010000 /* frozen for system suspend */
1497 #define PF_FSTRANS 0x00020000 /* inside a filesystem transaction */
1498 #define PF_KSWAPD 0x00040000 /* I am kswapd */
1499 #define PF_SWAPOFF 0x00080000 /* I am in swapoff */
1500 #define PF_LESS_THROTTLE 0x00100000 /* Throttle me less: I clean memory */
1501 #define PF_BORROWED_MM 0x00200000 /* I am a kthread doing use_mm */
1502 #define PF_RANDOMIZE 0x00400000 /* randomize virtual address space */
1503 #define PF_SWAPWRITE 0x00800000 /* Allowed to write to swap */
1504 #define PF_SPREAD_PAGE 0x01000000 /* Spread page cache over cpuset */
1505 #define PF_SPREAD_SLAB 0x02000000 /* Spread some slab caches over cpuset */
1506 #define PF_MEMPOLICY 0x10000000 /* Non-default NUMA mempolicy */
1507 #define PF_MUTEX_TESTER 0x20000000 /* Thread belongs to the rt mutex tester */
1508 #define PF_FREEZER_SKIP 0x40000000 /* Freezer should not count it as freezeable */
1511 * Only the _current_ task can read/write to tsk->flags, but other
1512 * tasks can access tsk->flags in readonly mode for example
1513 * with tsk_used_math (like during threaded core dumping).
1514 * There is however an exception to this rule during ptrace
1515 * or during fork: the ptracer task is allowed to write to the
1516 * child->flags of its traced child (same goes for fork, the parent
1517 * can write to the child->flags), because we're guaranteed the
1518 * child is not running and in turn not changing child->flags
1519 * at the same time the parent does it.
1521 #define clear_stopped_child_used_math(child) do { (child)->flags &= ~PF_USED_MATH; } while (0)
1522 #define set_stopped_child_used_math(child) do { (child)->flags |= PF_USED_MATH; } while (0)
1523 #define clear_used_math() clear_stopped_child_used_math(current)
1524 #define set_used_math() set_stopped_child_used_math(current)
1525 #define conditional_stopped_child_used_math(condition, child) \
1526 do { (child)->flags &= ~PF_USED_MATH, (child)->flags |= (condition) ? PF_USED_MATH : 0; } while (0)
1527 #define conditional_used_math(condition) \
1528 conditional_stopped_child_used_math(condition, current)
1529 #define copy_to_stopped_child_used_math(child) \
1530 do { (child)->flags &= ~PF_USED_MATH, (child)->flags |= current->flags & PF_USED_MATH; } while (0)
1531 /* NOTE: this will return 0 or PF_USED_MATH, it will never return 1 */
1532 #define tsk_used_math(p) ((p)->flags & PF_USED_MATH)
1533 #define used_math() tsk_used_math(current)
1536 extern int set_cpus_allowed_ptr(struct task_struct
*p
,
1537 const cpumask_t
*new_mask
);
1539 static inline int set_cpus_allowed_ptr(struct task_struct
*p
,
1540 const cpumask_t
*new_mask
)
1542 if (!cpu_isset(0, *new_mask
))
1547 static inline int set_cpus_allowed(struct task_struct
*p
, cpumask_t new_mask
)
1549 return set_cpus_allowed_ptr(p
, &new_mask
);
1552 extern unsigned long long sched_clock(void);
1555 * For kernel-internal use: high-speed (but slightly incorrect) per-cpu
1556 * clock constructed from sched_clock():
1558 extern unsigned long long cpu_clock(int cpu
);
1560 extern unsigned long long
1561 task_sched_runtime(struct task_struct
*task
);
1563 /* sched_exec is called by processes performing an exec */
1565 extern void sched_exec(void);
1567 #define sched_exec() {}
1570 extern void sched_clock_idle_sleep_event(void);
1571 extern void sched_clock_idle_wakeup_event(u64 delta_ns
);
1573 #ifdef CONFIG_HOTPLUG_CPU
1574 extern void idle_task_exit(void);
1576 static inline void idle_task_exit(void) {}
1579 extern void sched_idle_next(void);
1581 #if defined(CONFIG_NO_HZ) && defined(CONFIG_SMP)
1582 extern void wake_up_idle_cpu(int cpu
);
1584 static inline void wake_up_idle_cpu(int cpu
) { }
1587 #ifdef CONFIG_SCHED_DEBUG
1588 extern unsigned int sysctl_sched_latency
;
1589 extern unsigned int sysctl_sched_min_granularity
;
1590 extern unsigned int sysctl_sched_wakeup_granularity
;
1591 extern unsigned int sysctl_sched_child_runs_first
;
1592 extern unsigned int sysctl_sched_features
;
1593 extern unsigned int sysctl_sched_migration_cost
;
1594 extern unsigned int sysctl_sched_nr_migrate
;
1596 int sched_nr_latency_handler(struct ctl_table
*table
, int write
,
1597 struct file
*file
, void __user
*buffer
, size_t *length
,
1600 extern unsigned int sysctl_sched_rt_period
;
1601 extern int sysctl_sched_rt_runtime
;
1603 int sched_rt_handler(struct ctl_table
*table
, int write
,
1604 struct file
*filp
, void __user
*buffer
, size_t *lenp
,
1607 extern unsigned int sysctl_sched_compat_yield
;
1609 #ifdef CONFIG_RT_MUTEXES
1610 extern int rt_mutex_getprio(struct task_struct
*p
);
1611 extern void rt_mutex_setprio(struct task_struct
*p
, int prio
);
1612 extern void rt_mutex_adjust_pi(struct task_struct
*p
);
1614 static inline int rt_mutex_getprio(struct task_struct
*p
)
1616 return p
->normal_prio
;
1618 # define rt_mutex_adjust_pi(p) do { } while (0)
1621 extern void set_user_nice(struct task_struct
*p
, long nice
);
1622 extern int task_prio(const struct task_struct
*p
);
1623 extern int task_nice(const struct task_struct
*p
);
1624 extern int can_nice(const struct task_struct
*p
, const int nice
);
1625 extern int task_curr(const struct task_struct
*p
);
1626 extern int idle_cpu(int cpu
);
1627 extern int sched_setscheduler(struct task_struct
*, int, struct sched_param
*);
1628 extern struct task_struct
*idle_task(int cpu
);
1629 extern struct task_struct
*curr_task(int cpu
);
1630 extern void set_curr_task(int cpu
, struct task_struct
*p
);
1635 * The default (Linux) execution domain.
1637 extern struct exec_domain default_exec_domain
;
1639 union thread_union
{
1640 struct thread_info thread_info
;
1641 unsigned long stack
[THREAD_SIZE
/sizeof(long)];
1644 #ifndef __HAVE_ARCH_KSTACK_END
1645 static inline int kstack_end(void *addr
)
1647 /* Reliable end of stack detection:
1648 * Some APM bios versions misalign the stack
1650 return !(((unsigned long)addr
+sizeof(void*)-1) & (THREAD_SIZE
-sizeof(void*)));
1654 extern union thread_union init_thread_union
;
1655 extern struct task_struct init_task
;
1657 extern struct mm_struct init_mm
;
1659 extern struct pid_namespace init_pid_ns
;
1662 * find a task by one of its numerical ids
1664 * find_task_by_pid_type_ns():
1665 * it is the most generic call - it finds a task by all id,
1666 * type and namespace specified
1667 * find_task_by_pid_ns():
1668 * finds a task by its pid in the specified namespace
1669 * find_task_by_vpid():
1670 * finds a task by its virtual pid
1671 * find_task_by_pid():
1672 * finds a task by its global pid
1674 * see also find_pid() etc in include/linux/pid.h
1677 extern struct task_struct
*find_task_by_pid_type_ns(int type
, int pid
,
1678 struct pid_namespace
*ns
);
1680 static inline struct task_struct
*__deprecated
find_task_by_pid(pid_t nr
)
1682 return find_task_by_pid_type_ns(PIDTYPE_PID
, nr
, &init_pid_ns
);
1684 extern struct task_struct
*find_task_by_vpid(pid_t nr
);
1685 extern struct task_struct
*find_task_by_pid_ns(pid_t nr
,
1686 struct pid_namespace
*ns
);
1688 extern void __set_special_pids(struct pid
*pid
);
1690 /* per-UID process charging. */
1691 extern struct user_struct
* alloc_uid(struct user_namespace
*, uid_t
);
1692 static inline struct user_struct
*get_uid(struct user_struct
*u
)
1694 atomic_inc(&u
->__count
);
1697 extern void free_uid(struct user_struct
*);
1698 extern void switch_uid(struct user_struct
*);
1699 extern void release_uids(struct user_namespace
*ns
);
1701 #include <asm/current.h>
1703 extern void do_timer(unsigned long ticks
);
1705 extern int wake_up_state(struct task_struct
*tsk
, unsigned int state
);
1706 extern int wake_up_process(struct task_struct
*tsk
);
1707 extern void wake_up_new_task(struct task_struct
*tsk
,
1708 unsigned long clone_flags
);
1710 extern void kick_process(struct task_struct
*tsk
);
1712 static inline void kick_process(struct task_struct
*tsk
) { }
1714 extern void sched_fork(struct task_struct
*p
, int clone_flags
);
1715 extern void sched_dead(struct task_struct
*p
);
1717 extern int in_group_p(gid_t
);
1718 extern int in_egroup_p(gid_t
);
1720 extern void proc_caches_init(void);
1721 extern void flush_signals(struct task_struct
*);
1722 extern void ignore_signals(struct task_struct
*);
1723 extern void flush_signal_handlers(struct task_struct
*, int force_default
);
1724 extern int dequeue_signal(struct task_struct
*tsk
, sigset_t
*mask
, siginfo_t
*info
);
1726 static inline int dequeue_signal_lock(struct task_struct
*tsk
, sigset_t
*mask
, siginfo_t
*info
)
1728 unsigned long flags
;
1731 spin_lock_irqsave(&tsk
->sighand
->siglock
, flags
);
1732 ret
= dequeue_signal(tsk
, mask
, info
);
1733 spin_unlock_irqrestore(&tsk
->sighand
->siglock
, flags
);
1738 extern void block_all_signals(int (*notifier
)(void *priv
), void *priv
,
1740 extern void unblock_all_signals(void);
1741 extern void release_task(struct task_struct
* p
);
1742 extern int send_sig_info(int, struct siginfo
*, struct task_struct
*);
1743 extern int force_sigsegv(int, struct task_struct
*);
1744 extern int force_sig_info(int, struct siginfo
*, struct task_struct
*);
1745 extern int __kill_pgrp_info(int sig
, struct siginfo
*info
, struct pid
*pgrp
);
1746 extern int kill_pid_info(int sig
, struct siginfo
*info
, struct pid
*pid
);
1747 extern int kill_pid_info_as_uid(int, struct siginfo
*, struct pid
*, uid_t
, uid_t
, u32
);
1748 extern int kill_pgrp(struct pid
*pid
, int sig
, int priv
);
1749 extern int kill_pid(struct pid
*pid
, int sig
, int priv
);
1750 extern int kill_proc_info(int, struct siginfo
*, pid_t
);
1751 extern void do_notify_parent(struct task_struct
*, int);
1752 extern void force_sig(int, struct task_struct
*);
1753 extern void force_sig_specific(int, struct task_struct
*);
1754 extern int send_sig(int, struct task_struct
*, int);
1755 extern void zap_other_threads(struct task_struct
*p
);
1756 extern int kill_proc(pid_t
, int, int);
1757 extern struct sigqueue
*sigqueue_alloc(void);
1758 extern void sigqueue_free(struct sigqueue
*);
1759 extern int send_sigqueue(struct sigqueue
*, struct task_struct
*, int group
);
1760 extern int do_sigaction(int, struct k_sigaction
*, struct k_sigaction
*);
1761 extern int do_sigaltstack(const stack_t __user
*, stack_t __user
*, unsigned long);
1763 static inline int kill_cad_pid(int sig
, int priv
)
1765 return kill_pid(cad_pid
, sig
, priv
);
1768 /* These can be the second arg to send_sig_info/send_group_sig_info. */
1769 #define SEND_SIG_NOINFO ((struct siginfo *) 0)
1770 #define SEND_SIG_PRIV ((struct siginfo *) 1)
1771 #define SEND_SIG_FORCED ((struct siginfo *) 2)
1773 static inline int is_si_special(const struct siginfo
*info
)
1775 return info
<= SEND_SIG_FORCED
;
1778 /* True if we are on the alternate signal stack. */
1780 static inline int on_sig_stack(unsigned long sp
)
1782 return (sp
- current
->sas_ss_sp
< current
->sas_ss_size
);
1785 static inline int sas_ss_flags(unsigned long sp
)
1787 return (current
->sas_ss_size
== 0 ? SS_DISABLE
1788 : on_sig_stack(sp
) ? SS_ONSTACK
: 0);
1792 * Routines for handling mm_structs
1794 extern struct mm_struct
* mm_alloc(void);
1796 /* mmdrop drops the mm and the page tables */
1797 extern void __mmdrop(struct mm_struct
*);
1798 static inline void mmdrop(struct mm_struct
* mm
)
1800 if (unlikely(atomic_dec_and_test(&mm
->mm_count
)))
1804 /* mmput gets rid of the mappings and all user-space */
1805 extern void mmput(struct mm_struct
*);
1806 /* Grab a reference to a task's mm, if it is not already going away */
1807 extern struct mm_struct
*get_task_mm(struct task_struct
*task
);
1808 /* Remove the current tasks stale references to the old mm_struct */
1809 extern void mm_release(struct task_struct
*, struct mm_struct
*);
1810 /* Allocate a new mm structure and copy contents from tsk->mm */
1811 extern struct mm_struct
*dup_mm(struct task_struct
*tsk
);
1813 extern int copy_thread(int, unsigned long, unsigned long, unsigned long, struct task_struct
*, struct pt_regs
*);
1814 extern void flush_thread(void);
1815 extern void exit_thread(void);
1817 extern void exit_files(struct task_struct
*);
1818 extern void __cleanup_signal(struct signal_struct
*);
1819 extern void __cleanup_sighand(struct sighand_struct
*);
1820 extern void exit_itimers(struct signal_struct
*);
1822 extern NORET_TYPE
void do_group_exit(int);
1824 extern void daemonize(const char *, ...);
1825 extern int allow_signal(int);
1826 extern int disallow_signal(int);
1828 extern int do_execve(char *, char __user
* __user
*, char __user
* __user
*, struct pt_regs
*);
1829 extern long do_fork(unsigned long, unsigned long, struct pt_regs
*, unsigned long, int __user
*, int __user
*);
1830 struct task_struct
*fork_idle(int);
1832 extern void set_task_comm(struct task_struct
*tsk
, char *from
);
1833 extern char *get_task_comm(char *to
, struct task_struct
*tsk
);
1836 extern void wait_task_inactive(struct task_struct
* p
);
1838 #define wait_task_inactive(p) do { } while (0)
1841 #define remove_parent(p) list_del_init(&(p)->sibling)
1842 #define add_parent(p) list_add_tail(&(p)->sibling,&(p)->parent->children)
1844 #define next_task(p) list_entry(rcu_dereference((p)->tasks.next), struct task_struct, tasks)
1846 #define for_each_process(p) \
1847 for (p = &init_task ; (p = next_task(p)) != &init_task ; )
1850 * Careful: do_each_thread/while_each_thread is a double loop so
1851 * 'break' will not work as expected - use goto instead.
1853 #define do_each_thread(g, t) \
1854 for (g = t = &init_task ; (g = t = next_task(g)) != &init_task ; ) do
1856 #define while_each_thread(g, t) \
1857 while ((t = next_thread(t)) != g)
1859 /* de_thread depends on thread_group_leader not being a pid based check */
1860 #define thread_group_leader(p) (p == p->group_leader)
1862 /* Do to the insanities of de_thread it is possible for a process
1863 * to have the pid of the thread group leader without actually being
1864 * the thread group leader. For iteration through the pids in proc
1865 * all we care about is that we have a task with the appropriate
1866 * pid, we don't actually care if we have the right task.
1868 static inline int has_group_leader_pid(struct task_struct
*p
)
1870 return p
->pid
== p
->tgid
;
1874 int same_thread_group(struct task_struct
*p1
, struct task_struct
*p2
)
1876 return p1
->tgid
== p2
->tgid
;
1879 static inline struct task_struct
*next_thread(const struct task_struct
*p
)
1881 return list_entry(rcu_dereference(p
->thread_group
.next
),
1882 struct task_struct
, thread_group
);
1885 static inline int thread_group_empty(struct task_struct
*p
)
1887 return list_empty(&p
->thread_group
);
1890 #define delay_group_leader(p) \
1891 (thread_group_leader(p) && !thread_group_empty(p))
1894 * Protects ->fs, ->files, ->mm, ->group_info, ->comm, keyring
1895 * subscriptions and synchronises with wait4(). Also used in procfs. Also
1896 * pins the final release of task.io_context. Also protects ->cpuset and
1897 * ->cgroup.subsys[].
1899 * Nests both inside and outside of read_lock(&tasklist_lock).
1900 * It must not be nested with write_lock_irq(&tasklist_lock),
1901 * neither inside nor outside.
1903 static inline void task_lock(struct task_struct
*p
)
1905 spin_lock(&p
->alloc_lock
);
1908 static inline void task_unlock(struct task_struct
*p
)
1910 spin_unlock(&p
->alloc_lock
);
1913 extern struct sighand_struct
*lock_task_sighand(struct task_struct
*tsk
,
1914 unsigned long *flags
);
1916 static inline void unlock_task_sighand(struct task_struct
*tsk
,
1917 unsigned long *flags
)
1919 spin_unlock_irqrestore(&tsk
->sighand
->siglock
, *flags
);
1922 #ifndef __HAVE_THREAD_FUNCTIONS
1924 #define task_thread_info(task) ((struct thread_info *)(task)->stack)
1925 #define task_stack_page(task) ((task)->stack)
1927 static inline void setup_thread_stack(struct task_struct
*p
, struct task_struct
*org
)
1929 *task_thread_info(p
) = *task_thread_info(org
);
1930 task_thread_info(p
)->task
= p
;
1933 static inline unsigned long *end_of_stack(struct task_struct
*p
)
1935 return (unsigned long *)(task_thread_info(p
) + 1);
1940 extern void thread_info_cache_init(void);
1942 /* set thread flags in other task's structures
1943 * - see asm/thread_info.h for TIF_xxxx flags available
1945 static inline void set_tsk_thread_flag(struct task_struct
*tsk
, int flag
)
1947 set_ti_thread_flag(task_thread_info(tsk
), flag
);
1950 static inline void clear_tsk_thread_flag(struct task_struct
*tsk
, int flag
)
1952 clear_ti_thread_flag(task_thread_info(tsk
), flag
);
1955 static inline int test_and_set_tsk_thread_flag(struct task_struct
*tsk
, int flag
)
1957 return test_and_set_ti_thread_flag(task_thread_info(tsk
), flag
);
1960 static inline int test_and_clear_tsk_thread_flag(struct task_struct
*tsk
, int flag
)
1962 return test_and_clear_ti_thread_flag(task_thread_info(tsk
), flag
);
1965 static inline int test_tsk_thread_flag(struct task_struct
*tsk
, int flag
)
1967 return test_ti_thread_flag(task_thread_info(tsk
), flag
);
1970 static inline void set_tsk_need_resched(struct task_struct
*tsk
)
1972 set_tsk_thread_flag(tsk
,TIF_NEED_RESCHED
);
1975 static inline void clear_tsk_need_resched(struct task_struct
*tsk
)
1977 clear_tsk_thread_flag(tsk
,TIF_NEED_RESCHED
);
1980 static inline int signal_pending(struct task_struct
*p
)
1982 return unlikely(test_tsk_thread_flag(p
,TIF_SIGPENDING
));
1985 extern int __fatal_signal_pending(struct task_struct
*p
);
1987 static inline int fatal_signal_pending(struct task_struct
*p
)
1989 return signal_pending(p
) && __fatal_signal_pending(p
);
1992 static inline int need_resched(void)
1994 return unlikely(test_thread_flag(TIF_NEED_RESCHED
));
1998 * cond_resched() and cond_resched_lock(): latency reduction via
1999 * explicit rescheduling in places that are safe. The return
2000 * value indicates whether a reschedule was done in fact.
2001 * cond_resched_lock() will drop the spinlock before scheduling,
2002 * cond_resched_softirq() will enable bhs before scheduling.
2004 #ifdef CONFIG_PREEMPT
2005 static inline int cond_resched(void)
2010 extern int _cond_resched(void);
2011 static inline int cond_resched(void)
2013 return _cond_resched();
2016 extern int cond_resched_lock(spinlock_t
* lock
);
2017 extern int cond_resched_softirq(void);
2020 * Does a critical section need to be broken due to another
2021 * task waiting?: (technically does not depend on CONFIG_PREEMPT,
2022 * but a general need for low latency)
2024 static inline int spin_needbreak(spinlock_t
*lock
)
2026 #ifdef CONFIG_PREEMPT
2027 return spin_is_contended(lock
);
2034 * Reevaluate whether the task has signals pending delivery.
2035 * Wake the task if so.
2036 * This is required every time the blocked sigset_t changes.
2037 * callers must hold sighand->siglock.
2039 extern void recalc_sigpending_and_wake(struct task_struct
*t
);
2040 extern void recalc_sigpending(void);
2042 extern void signal_wake_up(struct task_struct
*t
, int resume_stopped
);
2045 * Wrappers for p->thread_info->cpu access. No-op on UP.
2049 static inline unsigned int task_cpu(const struct task_struct
*p
)
2051 return task_thread_info(p
)->cpu
;
2054 extern void set_task_cpu(struct task_struct
*p
, unsigned int cpu
);
2058 static inline unsigned int task_cpu(const struct task_struct
*p
)
2063 static inline void set_task_cpu(struct task_struct
*p
, unsigned int cpu
)
2067 #endif /* CONFIG_SMP */
2069 #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT
2070 extern void arch_pick_mmap_layout(struct mm_struct
*mm
);
2072 static inline void arch_pick_mmap_layout(struct mm_struct
*mm
)
2074 mm
->mmap_base
= TASK_UNMAPPED_BASE
;
2075 mm
->get_unmapped_area
= arch_get_unmapped_area
;
2076 mm
->unmap_area
= arch_unmap_area
;
2080 extern long sched_setaffinity(pid_t pid
, const cpumask_t
*new_mask
);
2081 extern long sched_getaffinity(pid_t pid
, cpumask_t
*mask
);
2083 extern int sched_mc_power_savings
, sched_smt_power_savings
;
2085 extern void normalize_rt_tasks(void);
2087 #ifdef CONFIG_GROUP_SCHED
2089 extern struct task_group init_task_group
;
2090 #ifdef CONFIG_USER_SCHED
2091 extern struct task_group root_task_group
;
2094 extern struct task_group
*sched_create_group(struct task_group
*parent
);
2095 extern void sched_destroy_group(struct task_group
*tg
);
2096 extern void sched_move_task(struct task_struct
*tsk
);
2097 #ifdef CONFIG_FAIR_GROUP_SCHED
2098 extern int sched_group_set_shares(struct task_group
*tg
, unsigned long shares
);
2099 extern unsigned long sched_group_shares(struct task_group
*tg
);
2101 #ifdef CONFIG_RT_GROUP_SCHED
2102 extern int sched_group_set_rt_runtime(struct task_group
*tg
,
2103 long rt_runtime_us
);
2104 extern long sched_group_rt_runtime(struct task_group
*tg
);
2105 extern int sched_group_set_rt_period(struct task_group
*tg
,
2107 extern long sched_group_rt_period(struct task_group
*tg
);
2111 #ifdef CONFIG_TASK_XACCT
2112 static inline void add_rchar(struct task_struct
*tsk
, ssize_t amt
)
2117 static inline void add_wchar(struct task_struct
*tsk
, ssize_t amt
)
2122 static inline void inc_syscr(struct task_struct
*tsk
)
2127 static inline void inc_syscw(struct task_struct
*tsk
)
2132 static inline void add_rchar(struct task_struct
*tsk
, ssize_t amt
)
2136 static inline void add_wchar(struct task_struct
*tsk
, ssize_t amt
)
2140 static inline void inc_syscr(struct task_struct
*tsk
)
2144 static inline void inc_syscw(struct task_struct
*tsk
)
2150 void migration_init(void);
2152 static inline void migration_init(void)
2157 #ifndef TASK_SIZE_OF
2158 #define TASK_SIZE_OF(tsk) TASK_SIZE
2161 #ifdef CONFIG_MM_OWNER
2162 extern void mm_update_next_owner(struct mm_struct
*mm
);
2163 extern void mm_init_owner(struct mm_struct
*mm
, struct task_struct
*p
);
2165 static inline void mm_update_next_owner(struct mm_struct
*mm
)
2169 static inline void mm_init_owner(struct mm_struct
*mm
, struct task_struct
*p
)
2172 #endif /* CONFIG_MM_OWNER */
2174 #endif /* __KERNEL__ */