Commit | Line | Data |
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1da177e4 LT |
1 | #ifndef _LINUX_SCHED_H |
2 | #define _LINUX_SCHED_H | |
3 | ||
b7b3c76a DW |
4 | /* |
5 | * cloning flags: | |
6 | */ | |
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 */ | |
071df104 | 25 | #define CLONE_NEWUTS 0x04000000 /* New utsname group? */ |
25b21cb2 | 26 | #define CLONE_NEWIPC 0x08000000 /* New ipcs */ |
77ec739d | 27 | #define CLONE_NEWUSER 0x10000000 /* New user namespace */ |
30e49c26 | 28 | #define CLONE_NEWPID 0x20000000 /* New pid namespace */ |
169e3674 | 29 | #define CLONE_NEWNET 0x40000000 /* New network namespace */ |
fadad878 | 30 | #define CLONE_IO 0x80000000 /* Clone io context */ |
b7b3c76a DW |
31 | |
32 | /* | |
33 | * Scheduling policies | |
34 | */ | |
35 | #define SCHED_NORMAL 0 | |
36 | #define SCHED_FIFO 1 | |
37 | #define SCHED_RR 2 | |
38 | #define SCHED_BATCH 3 | |
0e6aca43 IM |
39 | /* SCHED_ISO: reserved but not implemented yet */ |
40 | #define SCHED_IDLE 5 | |
b7b3c76a | 41 | |
a3b6714e | 42 | #ifdef __KERNEL__ |
b7b3c76a DW |
43 | |
44 | struct sched_param { | |
45 | int sched_priority; | |
46 | }; | |
47 | ||
1da177e4 LT |
48 | #include <asm/param.h> /* for HZ */ |
49 | ||
1da177e4 LT |
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> | |
c92ff1bd | 61 | #include <linux/mm_types.h> |
1da177e4 LT |
62 | |
63 | #include <asm/system.h> | |
1da177e4 LT |
64 | #include <asm/page.h> |
65 | #include <asm/ptrace.h> | |
1da177e4 LT |
66 | #include <asm/cputime.h> |
67 | ||
68 | #include <linux/smp.h> | |
69 | #include <linux/sem.h> | |
70 | #include <linux/signal.h> | |
5ad4e53b | 71 | #include <linux/path.h> |
1da177e4 LT |
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> | |
3e26c149 | 77 | #include <linux/proportions.h> |
1da177e4 | 78 | #include <linux/seccomp.h> |
e56d0903 | 79 | #include <linux/rcupdate.h> |
23f78d4a | 80 | #include <linux/rtmutex.h> |
1da177e4 | 81 | |
a3b6714e DW |
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> | |
7c3ab738 | 87 | #include <linux/task_io_accounting.h> |
5cb350ba | 88 | #include <linux/kobject.h> |
9745512c | 89 | #include <linux/latencytop.h> |
9e2b2dc4 | 90 | #include <linux/cred.h> |
a3b6714e DW |
91 | |
92 | #include <asm/processor.h> | |
36d57ac4 | 93 | |
78fb7466 | 94 | struct mem_cgroup; |
1da177e4 | 95 | struct exec_domain; |
c87e2837 | 96 | struct futex_pi_state; |
286100a6 | 97 | struct robust_list_head; |
d89d8796 | 98 | struct bio; |
ca0002a1 | 99 | struct bts_tracer; |
5ad4e53b | 100 | struct fs_struct; |
1da177e4 | 101 | |
1da177e4 LT |
102 | /* |
103 | * List of flags we want to share for kernel threads, | |
104 | * if only because they are not used by them anyway. | |
105 | */ | |
106 | #define CLONE_KERNEL (CLONE_FS | CLONE_FILES | CLONE_SIGHAND) | |
107 | ||
108 | /* | |
109 | * These are the constant used to fake the fixed-point load-average | |
110 | * counting. Some notes: | |
111 | * - 11 bit fractions expand to 22 bits by the multiplies: this gives | |
112 | * a load-average precision of 10 bits integer + 11 bits fractional | |
113 | * - if you want to count load-averages more often, you need more | |
114 | * precision, or rounding will get you. With 2-second counting freq, | |
115 | * the EXP_n values would be 1981, 2034 and 2043 if still using only | |
116 | * 11 bit fractions. | |
117 | */ | |
118 | extern unsigned long avenrun[]; /* Load averages */ | |
119 | ||
120 | #define FSHIFT 11 /* nr of bits of precision */ | |
121 | #define FIXED_1 (1<<FSHIFT) /* 1.0 as fixed-point */ | |
0c2043ab | 122 | #define LOAD_FREQ (5*HZ+1) /* 5 sec intervals */ |
1da177e4 LT |
123 | #define EXP_1 1884 /* 1/exp(5sec/1min) as fixed-point */ |
124 | #define EXP_5 2014 /* 1/exp(5sec/5min) */ | |
125 | #define EXP_15 2037 /* 1/exp(5sec/15min) */ | |
126 | ||
127 | #define CALC_LOAD(load,exp,n) \ | |
128 | load *= exp; \ | |
129 | load += n*(FIXED_1-exp); \ | |
130 | load >>= FSHIFT; | |
131 | ||
132 | extern unsigned long total_forks; | |
133 | extern int nr_threads; | |
1da177e4 LT |
134 | DECLARE_PER_CPU(unsigned long, process_counts); |
135 | extern int nr_processes(void); | |
136 | extern unsigned long nr_running(void); | |
137 | extern unsigned long nr_uninterruptible(void); | |
138 | extern unsigned long nr_iowait(void); | |
dce48a84 | 139 | extern void calc_global_load(void); |
1da177e4 | 140 | |
7e49fcce SR |
141 | extern unsigned long get_parent_ip(unsigned long addr); |
142 | ||
43ae34cb IM |
143 | struct seq_file; |
144 | struct cfs_rq; | |
4cf86d77 | 145 | struct task_group; |
43ae34cb IM |
146 | #ifdef CONFIG_SCHED_DEBUG |
147 | extern void proc_sched_show_task(struct task_struct *p, struct seq_file *m); | |
148 | extern void proc_sched_set_task(struct task_struct *p); | |
149 | extern void | |
5cef9eca | 150 | print_cfs_rq(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq); |
43ae34cb IM |
151 | #else |
152 | static inline void | |
153 | proc_sched_show_task(struct task_struct *p, struct seq_file *m) | |
154 | { | |
155 | } | |
156 | static inline void proc_sched_set_task(struct task_struct *p) | |
157 | { | |
158 | } | |
159 | static inline void | |
5cef9eca | 160 | print_cfs_rq(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq) |
43ae34cb IM |
161 | { |
162 | } | |
163 | #endif | |
1da177e4 | 164 | |
690229a0 IM |
165 | extern unsigned long long time_sync_thresh; |
166 | ||
4a8342d2 LT |
167 | /* |
168 | * Task state bitmask. NOTE! These bits are also | |
169 | * encoded in fs/proc/array.c: get_task_state(). | |
170 | * | |
171 | * We have two separate sets of flags: task->state | |
172 | * is about runnability, while task->exit_state are | |
173 | * about the task exiting. Confusing, but this way | |
174 | * modifying one set can't modify the other one by | |
175 | * mistake. | |
176 | */ | |
1da177e4 LT |
177 | #define TASK_RUNNING 0 |
178 | #define TASK_INTERRUPTIBLE 1 | |
179 | #define TASK_UNINTERRUPTIBLE 2 | |
f021a3c2 MW |
180 | #define __TASK_STOPPED 4 |
181 | #define __TASK_TRACED 8 | |
4a8342d2 LT |
182 | /* in tsk->exit_state */ |
183 | #define EXIT_ZOMBIE 16 | |
184 | #define EXIT_DEAD 32 | |
185 | /* in tsk->state again */ | |
af927232 | 186 | #define TASK_DEAD 64 |
f021a3c2 MW |
187 | #define TASK_WAKEKILL 128 |
188 | ||
189 | /* Convenience macros for the sake of set_task_state */ | |
190 | #define TASK_KILLABLE (TASK_WAKEKILL | TASK_UNINTERRUPTIBLE) | |
191 | #define TASK_STOPPED (TASK_WAKEKILL | __TASK_STOPPED) | |
192 | #define TASK_TRACED (TASK_WAKEKILL | __TASK_TRACED) | |
1da177e4 | 193 | |
92a1f4bc MW |
194 | /* Convenience macros for the sake of wake_up */ |
195 | #define TASK_NORMAL (TASK_INTERRUPTIBLE | TASK_UNINTERRUPTIBLE) | |
f021a3c2 | 196 | #define TASK_ALL (TASK_NORMAL | __TASK_STOPPED | __TASK_TRACED) |
92a1f4bc MW |
197 | |
198 | /* get_task_state() */ | |
199 | #define TASK_REPORT (TASK_RUNNING | TASK_INTERRUPTIBLE | \ | |
f021a3c2 MW |
200 | TASK_UNINTERRUPTIBLE | __TASK_STOPPED | \ |
201 | __TASK_TRACED) | |
92a1f4bc | 202 | |
f021a3c2 MW |
203 | #define task_is_traced(task) ((task->state & __TASK_TRACED) != 0) |
204 | #define task_is_stopped(task) ((task->state & __TASK_STOPPED) != 0) | |
92a1f4bc | 205 | #define task_is_stopped_or_traced(task) \ |
f021a3c2 | 206 | ((task->state & (__TASK_STOPPED | __TASK_TRACED)) != 0) |
92a1f4bc | 207 | #define task_contributes_to_load(task) \ |
e3c8ca83 NL |
208 | ((task->state & TASK_UNINTERRUPTIBLE) != 0 && \ |
209 | (task->flags & PF_FROZEN) == 0) | |
1da177e4 LT |
210 | |
211 | #define __set_task_state(tsk, state_value) \ | |
212 | do { (tsk)->state = (state_value); } while (0) | |
213 | #define set_task_state(tsk, state_value) \ | |
214 | set_mb((tsk)->state, (state_value)) | |
215 | ||
498d0c57 AM |
216 | /* |
217 | * set_current_state() includes a barrier so that the write of current->state | |
218 | * is correctly serialised wrt the caller's subsequent test of whether to | |
219 | * actually sleep: | |
220 | * | |
221 | * set_current_state(TASK_UNINTERRUPTIBLE); | |
222 | * if (do_i_need_to_sleep()) | |
223 | * schedule(); | |
224 | * | |
225 | * If the caller does not need such serialisation then use __set_current_state() | |
226 | */ | |
1da177e4 LT |
227 | #define __set_current_state(state_value) \ |
228 | do { current->state = (state_value); } while (0) | |
229 | #define set_current_state(state_value) \ | |
230 | set_mb(current->state, (state_value)) | |
231 | ||
232 | /* Task command name length */ | |
233 | #define TASK_COMM_LEN 16 | |
234 | ||
1da177e4 LT |
235 | #include <linux/spinlock.h> |
236 | ||
237 | /* | |
238 | * This serializes "schedule()" and also protects | |
239 | * the run-queue from deletions/modifications (but | |
240 | * _adding_ to the beginning of the run-queue has | |
241 | * a separate lock). | |
242 | */ | |
243 | extern rwlock_t tasklist_lock; | |
244 | extern spinlock_t mmlist_lock; | |
245 | ||
36c8b586 | 246 | struct task_struct; |
1da177e4 LT |
247 | |
248 | extern void sched_init(void); | |
249 | extern void sched_init_smp(void); | |
2d07b255 | 250 | extern asmlinkage void schedule_tail(struct task_struct *prev); |
36c8b586 | 251 | extern void init_idle(struct task_struct *idle, int cpu); |
1df21055 | 252 | extern void init_idle_bootup_task(struct task_struct *idle); |
1da177e4 | 253 | |
017730c1 | 254 | extern int runqueue_is_locked(void); |
ad474cac | 255 | extern void task_rq_unlock_wait(struct task_struct *p); |
017730c1 | 256 | |
6a7b3dc3 | 257 | extern cpumask_var_t nohz_cpu_mask; |
46cb4b7c SS |
258 | #if defined(CONFIG_SMP) && defined(CONFIG_NO_HZ) |
259 | extern int select_nohz_load_balancer(int cpu); | |
260 | #else | |
261 | static inline int select_nohz_load_balancer(int cpu) | |
262 | { | |
263 | return 0; | |
264 | } | |
265 | #endif | |
1da177e4 | 266 | |
e59e2ae2 | 267 | /* |
39bc89fd | 268 | * Only dump TASK_* tasks. (0 for all tasks) |
e59e2ae2 IM |
269 | */ |
270 | extern void show_state_filter(unsigned long state_filter); | |
271 | ||
272 | static inline void show_state(void) | |
273 | { | |
39bc89fd | 274 | show_state_filter(0); |
e59e2ae2 IM |
275 | } |
276 | ||
1da177e4 LT |
277 | extern void show_regs(struct pt_regs *); |
278 | ||
279 | /* | |
280 | * TASK is a pointer to the task whose backtrace we want to see (or NULL for current | |
281 | * task), SP is the stack pointer of the first frame that should be shown in the back | |
282 | * trace (or NULL if the entire call-chain of the task should be shown). | |
283 | */ | |
284 | extern void show_stack(struct task_struct *task, unsigned long *sp); | |
285 | ||
286 | void io_schedule(void); | |
287 | long io_schedule_timeout(long timeout); | |
288 | ||
289 | extern void cpu_init (void); | |
290 | extern void trap_init(void); | |
291 | extern void update_process_times(int user); | |
292 | extern void scheduler_tick(void); | |
293 | ||
82a1fcb9 IM |
294 | extern void sched_show_task(struct task_struct *p); |
295 | ||
8446f1d3 | 296 | #ifdef CONFIG_DETECT_SOFTLOCKUP |
6687a97d | 297 | extern void softlockup_tick(void); |
8446f1d3 | 298 | extern void touch_softlockup_watchdog(void); |
04c9167f | 299 | extern void touch_all_softlockup_watchdogs(void); |
baf48f65 MSB |
300 | extern int proc_dosoftlockup_thresh(struct ctl_table *table, int write, |
301 | struct file *filp, void __user *buffer, | |
302 | size_t *lenp, loff_t *ppos); | |
9c44bc03 | 303 | extern unsigned int softlockup_panic; |
9383d967 | 304 | extern int softlockup_thresh; |
8446f1d3 | 305 | #else |
6687a97d | 306 | static inline void softlockup_tick(void) |
8446f1d3 IM |
307 | { |
308 | } | |
8446f1d3 IM |
309 | static inline void touch_softlockup_watchdog(void) |
310 | { | |
311 | } | |
04c9167f JF |
312 | static inline void touch_all_softlockup_watchdogs(void) |
313 | { | |
314 | } | |
8446f1d3 IM |
315 | #endif |
316 | ||
e162b39a MSB |
317 | #ifdef CONFIG_DETECT_HUNG_TASK |
318 | extern unsigned int sysctl_hung_task_panic; | |
319 | extern unsigned long sysctl_hung_task_check_count; | |
320 | extern unsigned long sysctl_hung_task_timeout_secs; | |
321 | extern unsigned long sysctl_hung_task_warnings; | |
322 | extern int proc_dohung_task_timeout_secs(struct ctl_table *table, int write, | |
323 | struct file *filp, void __user *buffer, | |
324 | size_t *lenp, loff_t *ppos); | |
325 | #endif | |
8446f1d3 | 326 | |
1da177e4 LT |
327 | /* Attach to any functions which should be ignored in wchan output. */ |
328 | #define __sched __attribute__((__section__(".sched.text"))) | |
deaf2227 IM |
329 | |
330 | /* Linker adds these: start and end of __sched functions */ | |
331 | extern char __sched_text_start[], __sched_text_end[]; | |
332 | ||
1da177e4 LT |
333 | /* Is this address in the __sched functions? */ |
334 | extern int in_sched_functions(unsigned long addr); | |
335 | ||
336 | #define MAX_SCHEDULE_TIMEOUT LONG_MAX | |
b3c97528 | 337 | extern signed long schedule_timeout(signed long timeout); |
64ed93a2 | 338 | extern signed long schedule_timeout_interruptible(signed long timeout); |
294d5cc2 | 339 | extern signed long schedule_timeout_killable(signed long timeout); |
64ed93a2 | 340 | extern signed long schedule_timeout_uninterruptible(signed long timeout); |
41719b03 | 341 | asmlinkage void __schedule(void); |
1da177e4 | 342 | asmlinkage void schedule(void); |
0d66bf6d | 343 | extern int mutex_spin_on_owner(struct mutex *lock, struct thread_info *owner); |
1da177e4 | 344 | |
ab516013 | 345 | struct nsproxy; |
acce292c | 346 | struct user_namespace; |
1da177e4 LT |
347 | |
348 | /* Maximum number of active map areas.. This is a random (large) number */ | |
349 | #define DEFAULT_MAX_MAP_COUNT 65536 | |
350 | ||
351 | extern int sysctl_max_map_count; | |
352 | ||
353 | #include <linux/aio.h> | |
354 | ||
355 | extern unsigned long | |
356 | arch_get_unmapped_area(struct file *, unsigned long, unsigned long, | |
357 | unsigned long, unsigned long); | |
358 | extern unsigned long | |
359 | arch_get_unmapped_area_topdown(struct file *filp, unsigned long addr, | |
360 | unsigned long len, unsigned long pgoff, | |
361 | unsigned long flags); | |
1363c3cd WW |
362 | extern void arch_unmap_area(struct mm_struct *, unsigned long); |
363 | extern void arch_unmap_area_topdown(struct mm_struct *, unsigned long); | |
1da177e4 | 364 | |
f7d0b926 | 365 | #if USE_SPLIT_PTLOCKS |
f412ac08 HD |
366 | /* |
367 | * The mm counters are not protected by its page_table_lock, | |
368 | * so must be incremented atomically. | |
369 | */ | |
d3cb4871 CL |
370 | #define set_mm_counter(mm, member, value) atomic_long_set(&(mm)->_##member, value) |
371 | #define get_mm_counter(mm, member) ((unsigned long)atomic_long_read(&(mm)->_##member)) | |
372 | #define add_mm_counter(mm, member, value) atomic_long_add(value, &(mm)->_##member) | |
373 | #define inc_mm_counter(mm, member) atomic_long_inc(&(mm)->_##member) | |
374 | #define dec_mm_counter(mm, member) atomic_long_dec(&(mm)->_##member) | |
f412ac08 | 375 | |
f7d0b926 | 376 | #else /* !USE_SPLIT_PTLOCKS */ |
f412ac08 HD |
377 | /* |
378 | * The mm counters are protected by its page_table_lock, | |
379 | * so can be incremented directly. | |
380 | */ | |
1da177e4 LT |
381 | #define set_mm_counter(mm, member, value) (mm)->_##member = (value) |
382 | #define get_mm_counter(mm, member) ((mm)->_##member) | |
383 | #define add_mm_counter(mm, member, value) (mm)->_##member += (value) | |
384 | #define inc_mm_counter(mm, member) (mm)->_##member++ | |
385 | #define dec_mm_counter(mm, member) (mm)->_##member-- | |
f412ac08 | 386 | |
f7d0b926 | 387 | #endif /* !USE_SPLIT_PTLOCKS */ |
4294621f | 388 | |
f412ac08 HD |
389 | #define get_mm_rss(mm) \ |
390 | (get_mm_counter(mm, file_rss) + get_mm_counter(mm, anon_rss)) | |
365e9c87 HD |
391 | #define update_hiwater_rss(mm) do { \ |
392 | unsigned long _rss = get_mm_rss(mm); \ | |
393 | if ((mm)->hiwater_rss < _rss) \ | |
394 | (mm)->hiwater_rss = _rss; \ | |
395 | } while (0) | |
396 | #define update_hiwater_vm(mm) do { \ | |
397 | if ((mm)->hiwater_vm < (mm)->total_vm) \ | |
398 | (mm)->hiwater_vm = (mm)->total_vm; \ | |
399 | } while (0) | |
400 | ||
9de1581e ON |
401 | static inline unsigned long get_mm_hiwater_rss(struct mm_struct *mm) |
402 | { | |
403 | return max(mm->hiwater_rss, get_mm_rss(mm)); | |
404 | } | |
405 | ||
406 | static inline unsigned long get_mm_hiwater_vm(struct mm_struct *mm) | |
407 | { | |
408 | return max(mm->hiwater_vm, mm->total_vm); | |
409 | } | |
901608d9 | 410 | |
6c5d5238 KH |
411 | extern void set_dumpable(struct mm_struct *mm, int value); |
412 | extern int get_dumpable(struct mm_struct *mm); | |
413 | ||
414 | /* mm flags */ | |
3cb4a0bb | 415 | /* dumpable bits */ |
6c5d5238 KH |
416 | #define MMF_DUMPABLE 0 /* core dump is permitted */ |
417 | #define MMF_DUMP_SECURELY 1 /* core file is readable only by root */ | |
3cb4a0bb KH |
418 | #define MMF_DUMPABLE_BITS 2 |
419 | ||
420 | /* coredump filter bits */ | |
421 | #define MMF_DUMP_ANON_PRIVATE 2 | |
422 | #define MMF_DUMP_ANON_SHARED 3 | |
423 | #define MMF_DUMP_MAPPED_PRIVATE 4 | |
424 | #define MMF_DUMP_MAPPED_SHARED 5 | |
82df3973 | 425 | #define MMF_DUMP_ELF_HEADERS 6 |
e575f111 KM |
426 | #define MMF_DUMP_HUGETLB_PRIVATE 7 |
427 | #define MMF_DUMP_HUGETLB_SHARED 8 | |
3cb4a0bb | 428 | #define MMF_DUMP_FILTER_SHIFT MMF_DUMPABLE_BITS |
e575f111 | 429 | #define MMF_DUMP_FILTER_BITS 7 |
3cb4a0bb KH |
430 | #define MMF_DUMP_FILTER_MASK \ |
431 | (((1 << MMF_DUMP_FILTER_BITS) - 1) << MMF_DUMP_FILTER_SHIFT) | |
432 | #define MMF_DUMP_FILTER_DEFAULT \ | |
e575f111 | 433 | ((1 << MMF_DUMP_ANON_PRIVATE) | (1 << MMF_DUMP_ANON_SHARED) |\ |
656eb2cd RM |
434 | (1 << MMF_DUMP_HUGETLB_PRIVATE) | MMF_DUMP_MASK_DEFAULT_ELF) |
435 | ||
436 | #ifdef CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS | |
437 | # define MMF_DUMP_MASK_DEFAULT_ELF (1 << MMF_DUMP_ELF_HEADERS) | |
438 | #else | |
439 | # define MMF_DUMP_MASK_DEFAULT_ELF 0 | |
440 | #endif | |
6c5d5238 | 441 | |
1da177e4 LT |
442 | struct sighand_struct { |
443 | atomic_t count; | |
444 | struct k_sigaction action[_NSIG]; | |
445 | spinlock_t siglock; | |
b8fceee1 | 446 | wait_queue_head_t signalfd_wqh; |
1da177e4 LT |
447 | }; |
448 | ||
0e464814 | 449 | struct pacct_struct { |
f6ec29a4 KK |
450 | int ac_flag; |
451 | long ac_exitcode; | |
0e464814 | 452 | unsigned long ac_mem; |
77787bfb KK |
453 | cputime_t ac_utime, ac_stime; |
454 | unsigned long ac_minflt, ac_majflt; | |
0e464814 KK |
455 | }; |
456 | ||
f06febc9 FM |
457 | /** |
458 | * struct task_cputime - collected CPU time counts | |
459 | * @utime: time spent in user mode, in &cputime_t units | |
460 | * @stime: time spent in kernel mode, in &cputime_t units | |
461 | * @sum_exec_runtime: total time spent on the CPU, in nanoseconds | |
5ce73a4a | 462 | * |
f06febc9 FM |
463 | * This structure groups together three kinds of CPU time that are |
464 | * tracked for threads and thread groups. Most things considering | |
465 | * CPU time want to group these counts together and treat all three | |
466 | * of them in parallel. | |
467 | */ | |
468 | struct task_cputime { | |
469 | cputime_t utime; | |
470 | cputime_t stime; | |
471 | unsigned long long sum_exec_runtime; | |
472 | }; | |
473 | /* Alternate field names when used to cache expirations. */ | |
474 | #define prof_exp stime | |
475 | #define virt_exp utime | |
476 | #define sched_exp sum_exec_runtime | |
477 | ||
4cd4c1b4 PZ |
478 | #define INIT_CPUTIME \ |
479 | (struct task_cputime) { \ | |
480 | .utime = cputime_zero, \ | |
481 | .stime = cputime_zero, \ | |
482 | .sum_exec_runtime = 0, \ | |
483 | } | |
484 | ||
f06febc9 | 485 | /** |
4cd4c1b4 PZ |
486 | * struct thread_group_cputimer - thread group interval timer counts |
487 | * @cputime: thread group interval timers. | |
488 | * @running: non-zero when there are timers running and | |
489 | * @cputime receives updates. | |
490 | * @lock: lock for fields in this struct. | |
f06febc9 FM |
491 | * |
492 | * This structure contains the version of task_cputime, above, that is | |
4cd4c1b4 | 493 | * used for thread group CPU timer calculations. |
f06febc9 | 494 | */ |
4cd4c1b4 PZ |
495 | struct thread_group_cputimer { |
496 | struct task_cputime cputime; | |
497 | int running; | |
498 | spinlock_t lock; | |
f06febc9 | 499 | }; |
f06febc9 | 500 | |
1da177e4 LT |
501 | /* |
502 | * NOTE! "signal_struct" does not have it's own | |
503 | * locking, because a shared signal_struct always | |
504 | * implies a shared sighand_struct, so locking | |
505 | * sighand_struct is always a proper superset of | |
506 | * the locking of signal_struct. | |
507 | */ | |
508 | struct signal_struct { | |
509 | atomic_t count; | |
510 | atomic_t live; | |
511 | ||
512 | wait_queue_head_t wait_chldexit; /* for wait4() */ | |
513 | ||
514 | /* current thread group signal load-balancing target: */ | |
36c8b586 | 515 | struct task_struct *curr_target; |
1da177e4 LT |
516 | |
517 | /* shared signal handling: */ | |
518 | struct sigpending shared_pending; | |
519 | ||
520 | /* thread group exit support */ | |
521 | int group_exit_code; | |
522 | /* overloaded: | |
523 | * - notify group_exit_task when ->count is equal to notify_count | |
524 | * - everyone except group_exit_task is stopped during signal delivery | |
525 | * of fatal signals, group_exit_task processes the signal. | |
526 | */ | |
1da177e4 | 527 | int notify_count; |
07dd20e0 | 528 | struct task_struct *group_exit_task; |
1da177e4 LT |
529 | |
530 | /* thread group stop support, overloads group_exit_code too */ | |
531 | int group_stop_count; | |
532 | unsigned int flags; /* see SIGNAL_* flags below */ | |
533 | ||
534 | /* POSIX.1b Interval Timers */ | |
535 | struct list_head posix_timers; | |
536 | ||
537 | /* ITIMER_REAL timer for the process */ | |
2ff678b8 | 538 | struct hrtimer real_timer; |
fea9d175 | 539 | struct pid *leader_pid; |
2ff678b8 | 540 | ktime_t it_real_incr; |
1da177e4 LT |
541 | |
542 | /* ITIMER_PROF and ITIMER_VIRTUAL timers for the process */ | |
543 | cputime_t it_prof_expires, it_virt_expires; | |
544 | cputime_t it_prof_incr, it_virt_incr; | |
545 | ||
f06febc9 | 546 | /* |
4cd4c1b4 PZ |
547 | * Thread group totals for process CPU timers. |
548 | * See thread_group_cputimer(), et al, for details. | |
f06febc9 | 549 | */ |
4cd4c1b4 | 550 | struct thread_group_cputimer cputimer; |
f06febc9 FM |
551 | |
552 | /* Earliest-expiration cache. */ | |
553 | struct task_cputime cputime_expires; | |
554 | ||
555 | struct list_head cpu_timers[3]; | |
556 | ||
ab521dc0 | 557 | struct pid *tty_old_pgrp; |
1ec320af | 558 | |
1da177e4 LT |
559 | /* boolean value for session group leader */ |
560 | int leader; | |
561 | ||
562 | struct tty_struct *tty; /* NULL if no tty */ | |
563 | ||
564 | /* | |
565 | * Cumulative resource counters for dead threads in the group, | |
566 | * and for reaped dead child processes forked by this group. | |
567 | * Live threads maintain their own counters and add to these | |
568 | * in __exit_signal, except for the group leader. | |
569 | */ | |
32bd671d | 570 | cputime_t utime, stime, cutime, cstime; |
9ac52315 LV |
571 | cputime_t gtime; |
572 | cputime_t cgtime; | |
1da177e4 LT |
573 | unsigned long nvcsw, nivcsw, cnvcsw, cnivcsw; |
574 | unsigned long min_flt, maj_flt, cmin_flt, cmaj_flt; | |
6eaeeaba | 575 | unsigned long inblock, oublock, cinblock, coublock; |
940389b8 | 576 | struct task_io_accounting ioac; |
1da177e4 | 577 | |
32bd671d PZ |
578 | /* |
579 | * Cumulative ns of schedule CPU time fo dead threads in the | |
580 | * group, not including a zombie group leader, (This only differs | |
581 | * from jiffies_to_ns(utime + stime) if sched_clock uses something | |
582 | * other than jiffies.) | |
583 | */ | |
584 | unsigned long long sum_sched_runtime; | |
585 | ||
1da177e4 LT |
586 | /* |
587 | * We don't bother to synchronize most readers of this at all, | |
588 | * because there is no reader checking a limit that actually needs | |
589 | * to get both rlim_cur and rlim_max atomically, and either one | |
590 | * alone is a single word that can safely be read normally. | |
591 | * getrlimit/setrlimit use task_lock(current->group_leader) to | |
592 | * protect this instead of the siglock, because they really | |
593 | * have no need to disable irqs. | |
594 | */ | |
595 | struct rlimit rlim[RLIM_NLIMITS]; | |
596 | ||
0e464814 KK |
597 | #ifdef CONFIG_BSD_PROCESS_ACCT |
598 | struct pacct_struct pacct; /* per-process accounting information */ | |
599 | #endif | |
ad4ecbcb | 600 | #ifdef CONFIG_TASKSTATS |
ad4ecbcb SN |
601 | struct taskstats *stats; |
602 | #endif | |
522ed776 MT |
603 | #ifdef CONFIG_AUDIT |
604 | unsigned audit_tty; | |
605 | struct tty_audit_buf *tty_audit_buf; | |
606 | #endif | |
1da177e4 LT |
607 | }; |
608 | ||
4866cde0 NP |
609 | /* Context switch must be unlocked if interrupts are to be enabled */ |
610 | #ifdef __ARCH_WANT_INTERRUPTS_ON_CTXSW | |
611 | # define __ARCH_WANT_UNLOCKED_CTXSW | |
612 | #endif | |
613 | ||
1da177e4 LT |
614 | /* |
615 | * Bits in flags field of signal_struct. | |
616 | */ | |
617 | #define SIGNAL_STOP_STOPPED 0x00000001 /* job control stop in effect */ | |
618 | #define SIGNAL_STOP_DEQUEUED 0x00000002 /* stop signal dequeued */ | |
619 | #define SIGNAL_STOP_CONTINUED 0x00000004 /* SIGCONT since WCONTINUED reap */ | |
620 | #define SIGNAL_GROUP_EXIT 0x00000008 /* group exit in progress */ | |
e4420551 ON |
621 | /* |
622 | * Pending notifications to parent. | |
623 | */ | |
624 | #define SIGNAL_CLD_STOPPED 0x00000010 | |
625 | #define SIGNAL_CLD_CONTINUED 0x00000020 | |
626 | #define SIGNAL_CLD_MASK (SIGNAL_CLD_STOPPED|SIGNAL_CLD_CONTINUED) | |
1da177e4 | 627 | |
fae5fa44 ON |
628 | #define SIGNAL_UNKILLABLE 0x00000040 /* for init: ignore fatal signals */ |
629 | ||
ed5d2cac ON |
630 | /* If true, all threads except ->group_exit_task have pending SIGKILL */ |
631 | static inline int signal_group_exit(const struct signal_struct *sig) | |
632 | { | |
633 | return (sig->flags & SIGNAL_GROUP_EXIT) || | |
634 | (sig->group_exit_task != NULL); | |
635 | } | |
636 | ||
1da177e4 LT |
637 | /* |
638 | * Some day this will be a full-fledged user tracking system.. | |
639 | */ | |
640 | struct user_struct { | |
641 | atomic_t __count; /* reference count */ | |
642 | atomic_t processes; /* How many processes does this user have? */ | |
643 | atomic_t files; /* How many open files does this user have? */ | |
644 | atomic_t sigpending; /* How many pending signals does this user have? */ | |
2d9048e2 | 645 | #ifdef CONFIG_INOTIFY_USER |
0eeca283 RL |
646 | atomic_t inotify_watches; /* How many inotify watches does this user have? */ |
647 | atomic_t inotify_devs; /* How many inotify devs does this user have opened? */ | |
648 | #endif | |
7ef9964e | 649 | #ifdef CONFIG_EPOLL |
7ef9964e DL |
650 | atomic_t epoll_watches; /* The number of file descriptors currently watched */ |
651 | #endif | |
970a8645 | 652 | #ifdef CONFIG_POSIX_MQUEUE |
1da177e4 LT |
653 | /* protected by mq_lock */ |
654 | unsigned long mq_bytes; /* How many bytes can be allocated to mqueue? */ | |
970a8645 | 655 | #endif |
1da177e4 LT |
656 | unsigned long locked_shm; /* How many pages of mlocked shm ? */ |
657 | ||
658 | #ifdef CONFIG_KEYS | |
659 | struct key *uid_keyring; /* UID specific keyring */ | |
660 | struct key *session_keyring; /* UID's default session keyring */ | |
661 | #endif | |
662 | ||
663 | /* Hash table maintenance information */ | |
735de223 | 664 | struct hlist_node uidhash_node; |
1da177e4 | 665 | uid_t uid; |
18b6e041 | 666 | struct user_namespace *user_ns; |
24e377a8 | 667 | |
052f1dc7 | 668 | #ifdef CONFIG_USER_SCHED |
4cf86d77 | 669 | struct task_group *tg; |
b1a8c172 | 670 | #ifdef CONFIG_SYSFS |
eb41d946 | 671 | struct kobject kobj; |
5cb350ba | 672 | struct work_struct work; |
24e377a8 | 673 | #endif |
b1a8c172 | 674 | #endif |
1da177e4 LT |
675 | }; |
676 | ||
eb41d946 | 677 | extern int uids_sysfs_init(void); |
5cb350ba | 678 | |
1da177e4 LT |
679 | extern struct user_struct *find_user(uid_t); |
680 | ||
681 | extern struct user_struct root_user; | |
682 | #define INIT_USER (&root_user) | |
683 | ||
b6dff3ec | 684 | |
1da177e4 LT |
685 | struct backing_dev_info; |
686 | struct reclaim_state; | |
687 | ||
52f17b6c | 688 | #if defined(CONFIG_SCHEDSTATS) || defined(CONFIG_TASK_DELAY_ACCT) |
1da177e4 LT |
689 | struct sched_info { |
690 | /* cumulative counters */ | |
2d72376b | 691 | unsigned long pcount; /* # of times run on this cpu */ |
9c2c4802 | 692 | unsigned long long run_delay; /* time spent waiting on a runqueue */ |
1da177e4 LT |
693 | |
694 | /* timestamps */ | |
172ba844 BS |
695 | unsigned long long last_arrival,/* when we last ran on a cpu */ |
696 | last_queued; /* when we were last queued to run */ | |
b8efb561 IM |
697 | #ifdef CONFIG_SCHEDSTATS |
698 | /* BKL stats */ | |
480b9434 | 699 | unsigned int bkl_count; |
b8efb561 | 700 | #endif |
1da177e4 | 701 | }; |
52f17b6c | 702 | #endif /* defined(CONFIG_SCHEDSTATS) || defined(CONFIG_TASK_DELAY_ACCT) */ |
1da177e4 | 703 | |
ca74e92b SN |
704 | #ifdef CONFIG_TASK_DELAY_ACCT |
705 | struct task_delay_info { | |
706 | spinlock_t lock; | |
707 | unsigned int flags; /* Private per-task flags */ | |
708 | ||
709 | /* For each stat XXX, add following, aligned appropriately | |
710 | * | |
711 | * struct timespec XXX_start, XXX_end; | |
712 | * u64 XXX_delay; | |
713 | * u32 XXX_count; | |
714 | * | |
715 | * Atomicity of updates to XXX_delay, XXX_count protected by | |
716 | * single lock above (split into XXX_lock if contention is an issue). | |
717 | */ | |
0ff92245 SN |
718 | |
719 | /* | |
720 | * XXX_count is incremented on every XXX operation, the delay | |
721 | * associated with the operation is added to XXX_delay. | |
722 | * XXX_delay contains the accumulated delay time in nanoseconds. | |
723 | */ | |
724 | struct timespec blkio_start, blkio_end; /* Shared by blkio, swapin */ | |
725 | u64 blkio_delay; /* wait for sync block io completion */ | |
726 | u64 swapin_delay; /* wait for swapin block io completion */ | |
727 | u32 blkio_count; /* total count of the number of sync block */ | |
728 | /* io operations performed */ | |
729 | u32 swapin_count; /* total count of the number of swapin block */ | |
730 | /* io operations performed */ | |
873b4771 KK |
731 | |
732 | struct timespec freepages_start, freepages_end; | |
733 | u64 freepages_delay; /* wait for memory reclaim */ | |
734 | u32 freepages_count; /* total count of memory reclaim */ | |
ca74e92b | 735 | }; |
52f17b6c CS |
736 | #endif /* CONFIG_TASK_DELAY_ACCT */ |
737 | ||
738 | static inline int sched_info_on(void) | |
739 | { | |
740 | #ifdef CONFIG_SCHEDSTATS | |
741 | return 1; | |
742 | #elif defined(CONFIG_TASK_DELAY_ACCT) | |
743 | extern int delayacct_on; | |
744 | return delayacct_on; | |
745 | #else | |
746 | return 0; | |
ca74e92b | 747 | #endif |
52f17b6c | 748 | } |
ca74e92b | 749 | |
d15bcfdb IM |
750 | enum cpu_idle_type { |
751 | CPU_IDLE, | |
752 | CPU_NOT_IDLE, | |
753 | CPU_NEWLY_IDLE, | |
754 | CPU_MAX_IDLE_TYPES | |
1da177e4 LT |
755 | }; |
756 | ||
757 | /* | |
758 | * sched-domains (multiprocessor balancing) declarations: | |
759 | */ | |
9aa7b369 IM |
760 | |
761 | /* | |
762 | * Increase resolution of nice-level calculations: | |
763 | */ | |
764 | #define SCHED_LOAD_SHIFT 10 | |
765 | #define SCHED_LOAD_SCALE (1L << SCHED_LOAD_SHIFT) | |
766 | ||
f8700df7 | 767 | #define SCHED_LOAD_SCALE_FUZZ SCHED_LOAD_SCALE |
1da177e4 | 768 | |
2dd73a4f | 769 | #ifdef CONFIG_SMP |
1da177e4 LT |
770 | #define SD_LOAD_BALANCE 1 /* Do load balancing on this domain. */ |
771 | #define SD_BALANCE_NEWIDLE 2 /* Balance when about to become idle */ | |
772 | #define SD_BALANCE_EXEC 4 /* Balance on exec */ | |
147cbb4b NP |
773 | #define SD_BALANCE_FORK 8 /* Balance on fork, clone */ |
774 | #define SD_WAKE_IDLE 16 /* Wake to idle CPU on task wakeup */ | |
775 | #define SD_WAKE_AFFINE 32 /* Wake task to waking CPU */ | |
776 | #define SD_WAKE_BALANCE 64 /* Perform balancing at task wakeup */ | |
777 | #define SD_SHARE_CPUPOWER 128 /* Domain members share cpu power */ | |
5c45bf27 | 778 | #define SD_POWERSAVINGS_BALANCE 256 /* Balance for power savings */ |
89c4710e | 779 | #define SD_SHARE_PKG_RESOURCES 512 /* Domain members share cpu pkg resources */ |
08c183f3 | 780 | #define SD_SERIALIZE 1024 /* Only a single load balancing instance */ |
1d3504fc | 781 | #define SD_WAKE_IDLE_FAR 2048 /* Gain latency sacrificing cache hit */ |
5c45bf27 | 782 | |
afb8a9b7 GS |
783 | enum powersavings_balance_level { |
784 | POWERSAVINGS_BALANCE_NONE = 0, /* No power saving load balance */ | |
785 | POWERSAVINGS_BALANCE_BASIC, /* Fill one thread/core/package | |
786 | * first for long running threads | |
787 | */ | |
788 | POWERSAVINGS_BALANCE_WAKEUP, /* Also bias task wakeups to semi-idle | |
789 | * cpu package for power savings | |
790 | */ | |
791 | MAX_POWERSAVINGS_BALANCE_LEVELS | |
792 | }; | |
89c4710e | 793 | |
716707b2 | 794 | extern int sched_mc_power_savings, sched_smt_power_savings; |
89c4710e | 795 | |
716707b2 VS |
796 | static inline int sd_balance_for_mc_power(void) |
797 | { | |
798 | if (sched_smt_power_savings) | |
799 | return SD_POWERSAVINGS_BALANCE; | |
5c45bf27 | 800 | |
716707b2 VS |
801 | return 0; |
802 | } | |
89c4710e | 803 | |
716707b2 VS |
804 | static inline int sd_balance_for_package_power(void) |
805 | { | |
806 | if (sched_mc_power_savings | sched_smt_power_savings) | |
807 | return SD_POWERSAVINGS_BALANCE; | |
808 | ||
809 | return 0; | |
810 | } | |
5c45bf27 | 811 | |
100fdaee VS |
812 | /* |
813 | * Optimise SD flags for power savings: | |
814 | * SD_BALANCE_NEWIDLE helps agressive task consolidation and power savings. | |
815 | * Keep default SD flags if sched_{smt,mc}_power_saving=0 | |
816 | */ | |
817 | ||
818 | static inline int sd_power_saving_flags(void) | |
819 | { | |
820 | if (sched_mc_power_savings | sched_smt_power_savings) | |
821 | return SD_BALANCE_NEWIDLE; | |
822 | ||
823 | return 0; | |
824 | } | |
1da177e4 LT |
825 | |
826 | struct sched_group { | |
827 | struct sched_group *next; /* Must be a circular list */ | |
1da177e4 LT |
828 | |
829 | /* | |
830 | * CPU power of this group, SCHED_LOAD_SCALE being max power for a | |
831 | * single CPU. This is read only (except for setup, hotplug CPU). | |
5517d86b | 832 | * Note : Never change cpu_power without recompute its reciprocal |
1da177e4 | 833 | */ |
5517d86b ED |
834 | unsigned int __cpu_power; |
835 | /* | |
836 | * reciprocal value of cpu_power to avoid expensive divides | |
837 | * (see include/linux/reciprocal_div.h) | |
838 | */ | |
839 | u32 reciprocal_cpu_power; | |
6c99e9ad RR |
840 | |
841 | unsigned long cpumask[]; | |
1da177e4 LT |
842 | }; |
843 | ||
758b2cdc RR |
844 | static inline struct cpumask *sched_group_cpus(struct sched_group *sg) |
845 | { | |
6c99e9ad | 846 | return to_cpumask(sg->cpumask); |
758b2cdc RR |
847 | } |
848 | ||
1d3504fc HS |
849 | enum sched_domain_level { |
850 | SD_LV_NONE = 0, | |
851 | SD_LV_SIBLING, | |
852 | SD_LV_MC, | |
853 | SD_LV_CPU, | |
854 | SD_LV_NODE, | |
855 | SD_LV_ALLNODES, | |
856 | SD_LV_MAX | |
857 | }; | |
858 | ||
859 | struct sched_domain_attr { | |
860 | int relax_domain_level; | |
861 | }; | |
862 | ||
863 | #define SD_ATTR_INIT (struct sched_domain_attr) { \ | |
864 | .relax_domain_level = -1, \ | |
865 | } | |
866 | ||
1da177e4 LT |
867 | struct sched_domain { |
868 | /* These fields must be setup */ | |
869 | struct sched_domain *parent; /* top domain must be null terminated */ | |
1a848870 | 870 | struct sched_domain *child; /* bottom domain must be null terminated */ |
1da177e4 | 871 | struct sched_group *groups; /* the balancing groups of the domain */ |
1da177e4 LT |
872 | unsigned long min_interval; /* Minimum balance interval ms */ |
873 | unsigned long max_interval; /* Maximum balance interval ms */ | |
874 | unsigned int busy_factor; /* less balancing by factor if busy */ | |
875 | unsigned int imbalance_pct; /* No balance until over watermark */ | |
1da177e4 | 876 | unsigned int cache_nice_tries; /* Leave cache hot tasks for # tries */ |
7897986b NP |
877 | unsigned int busy_idx; |
878 | unsigned int idle_idx; | |
879 | unsigned int newidle_idx; | |
880 | unsigned int wake_idx; | |
147cbb4b | 881 | unsigned int forkexec_idx; |
1da177e4 | 882 | int flags; /* See SD_* */ |
1d3504fc | 883 | enum sched_domain_level level; |
1da177e4 LT |
884 | |
885 | /* Runtime fields. */ | |
886 | unsigned long last_balance; /* init to jiffies. units in jiffies */ | |
887 | unsigned int balance_interval; /* initialise to 1. units in ms. */ | |
888 | unsigned int nr_balance_failed; /* initialise to 0 */ | |
889 | ||
2398f2c6 PZ |
890 | u64 last_update; |
891 | ||
1da177e4 LT |
892 | #ifdef CONFIG_SCHEDSTATS |
893 | /* load_balance() stats */ | |
480b9434 KC |
894 | unsigned int lb_count[CPU_MAX_IDLE_TYPES]; |
895 | unsigned int lb_failed[CPU_MAX_IDLE_TYPES]; | |
896 | unsigned int lb_balanced[CPU_MAX_IDLE_TYPES]; | |
897 | unsigned int lb_imbalance[CPU_MAX_IDLE_TYPES]; | |
898 | unsigned int lb_gained[CPU_MAX_IDLE_TYPES]; | |
899 | unsigned int lb_hot_gained[CPU_MAX_IDLE_TYPES]; | |
900 | unsigned int lb_nobusyg[CPU_MAX_IDLE_TYPES]; | |
901 | unsigned int lb_nobusyq[CPU_MAX_IDLE_TYPES]; | |
1da177e4 LT |
902 | |
903 | /* Active load balancing */ | |
480b9434 KC |
904 | unsigned int alb_count; |
905 | unsigned int alb_failed; | |
906 | unsigned int alb_pushed; | |
1da177e4 | 907 | |
68767a0a | 908 | /* SD_BALANCE_EXEC stats */ |
480b9434 KC |
909 | unsigned int sbe_count; |
910 | unsigned int sbe_balanced; | |
911 | unsigned int sbe_pushed; | |
1da177e4 | 912 | |
68767a0a | 913 | /* SD_BALANCE_FORK stats */ |
480b9434 KC |
914 | unsigned int sbf_count; |
915 | unsigned int sbf_balanced; | |
916 | unsigned int sbf_pushed; | |
68767a0a | 917 | |
1da177e4 | 918 | /* try_to_wake_up() stats */ |
480b9434 KC |
919 | unsigned int ttwu_wake_remote; |
920 | unsigned int ttwu_move_affine; | |
921 | unsigned int ttwu_move_balance; | |
1da177e4 | 922 | #endif |
a5d8c348 IM |
923 | #ifdef CONFIG_SCHED_DEBUG |
924 | char *name; | |
925 | #endif | |
6c99e9ad RR |
926 | |
927 | /* span of all CPUs in this domain */ | |
928 | unsigned long span[]; | |
1da177e4 LT |
929 | }; |
930 | ||
758b2cdc RR |
931 | static inline struct cpumask *sched_domain_span(struct sched_domain *sd) |
932 | { | |
6c99e9ad | 933 | return to_cpumask(sd->span); |
758b2cdc RR |
934 | } |
935 | ||
96f874e2 | 936 | extern void partition_sched_domains(int ndoms_new, struct cpumask *doms_new, |
1d3504fc | 937 | struct sched_domain_attr *dattr_new); |
029190c5 | 938 | |
06aaf76a IM |
939 | /* Test a flag in parent sched domain */ |
940 | static inline int test_sd_parent(struct sched_domain *sd, int flag) | |
941 | { | |
942 | if (sd->parent && (sd->parent->flags & flag)) | |
943 | return 1; | |
944 | ||
945 | return 0; | |
946 | } | |
029190c5 | 947 | |
1b427c15 | 948 | #else /* CONFIG_SMP */ |
1da177e4 | 949 | |
1b427c15 | 950 | struct sched_domain_attr; |
d02c7a8c | 951 | |
1b427c15 | 952 | static inline void |
96f874e2 | 953 | partition_sched_domains(int ndoms_new, struct cpumask *doms_new, |
1b427c15 IM |
954 | struct sched_domain_attr *dattr_new) |
955 | { | |
d02c7a8c | 956 | } |
1b427c15 | 957 | #endif /* !CONFIG_SMP */ |
1da177e4 LT |
958 | |
959 | struct io_context; /* See blkdev.h */ | |
1da177e4 | 960 | |
1da177e4 | 961 | |
383f2835 | 962 | #ifdef ARCH_HAS_PREFETCH_SWITCH_STACK |
36c8b586 | 963 | extern void prefetch_stack(struct task_struct *t); |
383f2835 CK |
964 | #else |
965 | static inline void prefetch_stack(struct task_struct *t) { } | |
966 | #endif | |
1da177e4 LT |
967 | |
968 | struct audit_context; /* See audit.c */ | |
969 | struct mempolicy; | |
b92ce558 | 970 | struct pipe_inode_info; |
4865ecf1 | 971 | struct uts_namespace; |
1da177e4 | 972 | |
20b8a59f IM |
973 | struct rq; |
974 | struct sched_domain; | |
975 | ||
976 | struct sched_class { | |
5522d5d5 | 977 | const struct sched_class *next; |
20b8a59f | 978 | |
fd390f6a | 979 | void (*enqueue_task) (struct rq *rq, struct task_struct *p, int wakeup); |
f02231e5 | 980 | void (*dequeue_task) (struct rq *rq, struct task_struct *p, int sleep); |
4530d7ab | 981 | void (*yield_task) (struct rq *rq); |
20b8a59f | 982 | |
15afe09b | 983 | void (*check_preempt_curr) (struct rq *rq, struct task_struct *p, int sync); |
20b8a59f | 984 | |
fb8d4724 | 985 | struct task_struct * (*pick_next_task) (struct rq *rq); |
31ee529c | 986 | void (*put_prev_task) (struct rq *rq, struct task_struct *p); |
20b8a59f | 987 | |
681f3e68 | 988 | #ifdef CONFIG_SMP |
4ce72a2c LZ |
989 | int (*select_task_rq)(struct task_struct *p, int sync); |
990 | ||
43010659 | 991 | unsigned long (*load_balance) (struct rq *this_rq, int this_cpu, |
e1d1484f | 992 | struct rq *busiest, unsigned long max_load_move, |
20b8a59f | 993 | struct sched_domain *sd, enum cpu_idle_type idle, |
a4ac01c3 | 994 | int *all_pinned, int *this_best_prio); |
20b8a59f | 995 | |
e1d1484f PW |
996 | int (*move_one_task) (struct rq *this_rq, int this_cpu, |
997 | struct rq *busiest, struct sched_domain *sd, | |
998 | enum cpu_idle_type idle); | |
9a897c5a | 999 | void (*pre_schedule) (struct rq *this_rq, struct task_struct *task); |
967fc046 | 1000 | int (*needs_post_schedule) (struct rq *this_rq); |
9a897c5a SR |
1001 | void (*post_schedule) (struct rq *this_rq); |
1002 | void (*task_wake_up) (struct rq *this_rq, struct task_struct *task); | |
e1d1484f | 1003 | |
cd8ba7cd | 1004 | void (*set_cpus_allowed)(struct task_struct *p, |
96f874e2 | 1005 | const struct cpumask *newmask); |
57d885fe | 1006 | |
1f11eb6a GH |
1007 | void (*rq_online)(struct rq *rq); |
1008 | void (*rq_offline)(struct rq *rq); | |
4ce72a2c LZ |
1009 | #endif |
1010 | ||
1011 | void (*set_curr_task) (struct rq *rq); | |
1012 | void (*task_tick) (struct rq *rq, struct task_struct *p, int queued); | |
1013 | void (*task_new) (struct rq *rq, struct task_struct *p); | |
cb469845 SR |
1014 | |
1015 | void (*switched_from) (struct rq *this_rq, struct task_struct *task, | |
1016 | int running); | |
1017 | void (*switched_to) (struct rq *this_rq, struct task_struct *task, | |
1018 | int running); | |
1019 | void (*prio_changed) (struct rq *this_rq, struct task_struct *task, | |
1020 | int oldprio, int running); | |
810b3817 PZ |
1021 | |
1022 | #ifdef CONFIG_FAIR_GROUP_SCHED | |
1023 | void (*moved_group) (struct task_struct *p); | |
1024 | #endif | |
20b8a59f IM |
1025 | }; |
1026 | ||
1027 | struct load_weight { | |
1028 | unsigned long weight, inv_weight; | |
1029 | }; | |
1030 | ||
1031 | /* | |
1032 | * CFS stats for a schedulable entity (task, task-group etc) | |
1033 | * | |
1034 | * Current field usage histogram: | |
1035 | * | |
1036 | * 4 se->block_start | |
1037 | * 4 se->run_node | |
1038 | * 4 se->sleep_start | |
20b8a59f | 1039 | * 6 se->load.weight |
20b8a59f IM |
1040 | */ |
1041 | struct sched_entity { | |
20b8a59f IM |
1042 | struct load_weight load; /* for load-balancing */ |
1043 | struct rb_node run_node; | |
4a55bd5e | 1044 | struct list_head group_node; |
20b8a59f IM |
1045 | unsigned int on_rq; |
1046 | ||
94c18227 IM |
1047 | u64 exec_start; |
1048 | u64 sum_exec_runtime; | |
e9acbff6 | 1049 | u64 vruntime; |
f6cf891c | 1050 | u64 prev_sum_exec_runtime; |
94c18227 | 1051 | |
4ae7d5ce IM |
1052 | u64 last_wakeup; |
1053 | u64 avg_overlap; | |
1054 | ||
34cb6135 IM |
1055 | u64 start_runtime; |
1056 | u64 avg_wakeup; | |
1057 | u64 nr_migrations; | |
1058 | ||
94c18227 | 1059 | #ifdef CONFIG_SCHEDSTATS |
20b8a59f | 1060 | u64 wait_start; |
94c18227 | 1061 | u64 wait_max; |
6d082592 AV |
1062 | u64 wait_count; |
1063 | u64 wait_sum; | |
94c18227 | 1064 | |
20b8a59f | 1065 | u64 sleep_start; |
20b8a59f | 1066 | u64 sleep_max; |
94c18227 IM |
1067 | s64 sum_sleep_runtime; |
1068 | ||
1069 | u64 block_start; | |
20b8a59f IM |
1070 | u64 block_max; |
1071 | u64 exec_max; | |
eba1ed4b | 1072 | u64 slice_max; |
cc367732 | 1073 | |
cc367732 IM |
1074 | u64 nr_migrations_cold; |
1075 | u64 nr_failed_migrations_affine; | |
1076 | u64 nr_failed_migrations_running; | |
1077 | u64 nr_failed_migrations_hot; | |
1078 | u64 nr_forced_migrations; | |
1079 | u64 nr_forced2_migrations; | |
1080 | ||
1081 | u64 nr_wakeups; | |
1082 | u64 nr_wakeups_sync; | |
1083 | u64 nr_wakeups_migrate; | |
1084 | u64 nr_wakeups_local; | |
1085 | u64 nr_wakeups_remote; | |
1086 | u64 nr_wakeups_affine; | |
1087 | u64 nr_wakeups_affine_attempts; | |
1088 | u64 nr_wakeups_passive; | |
1089 | u64 nr_wakeups_idle; | |
94c18227 IM |
1090 | #endif |
1091 | ||
20b8a59f IM |
1092 | #ifdef CONFIG_FAIR_GROUP_SCHED |
1093 | struct sched_entity *parent; | |
1094 | /* rq on which this entity is (to be) queued: */ | |
1095 | struct cfs_rq *cfs_rq; | |
1096 | /* rq "owned" by this entity/group: */ | |
1097 | struct cfs_rq *my_q; | |
1098 | #endif | |
1099 | }; | |
70b97a7f | 1100 | |
fa717060 PZ |
1101 | struct sched_rt_entity { |
1102 | struct list_head run_list; | |
78f2c7db | 1103 | unsigned long timeout; |
bee367ed | 1104 | unsigned int time_slice; |
6f505b16 PZ |
1105 | int nr_cpus_allowed; |
1106 | ||
58d6c2d7 | 1107 | struct sched_rt_entity *back; |
052f1dc7 | 1108 | #ifdef CONFIG_RT_GROUP_SCHED |
6f505b16 PZ |
1109 | struct sched_rt_entity *parent; |
1110 | /* rq on which this entity is (to be) queued: */ | |
1111 | struct rt_rq *rt_rq; | |
1112 | /* rq "owned" by this entity/group: */ | |
1113 | struct rt_rq *my_q; | |
1114 | #endif | |
fa717060 PZ |
1115 | }; |
1116 | ||
1da177e4 LT |
1117 | struct task_struct { |
1118 | volatile long state; /* -1 unrunnable, 0 runnable, >0 stopped */ | |
f7e4217b | 1119 | void *stack; |
1da177e4 | 1120 | atomic_t usage; |
97dc32cd WC |
1121 | unsigned int flags; /* per process flags, defined below */ |
1122 | unsigned int ptrace; | |
1da177e4 | 1123 | |
36772092 | 1124 | int lock_depth; /* BKL lock depth */ |
1da177e4 | 1125 | |
2dd73a4f PW |
1126 | #ifdef CONFIG_SMP |
1127 | #ifdef __ARCH_WANT_UNLOCKED_CTXSW | |
4866cde0 NP |
1128 | int oncpu; |
1129 | #endif | |
2dd73a4f | 1130 | #endif |
50e645a8 | 1131 | |
b29739f9 | 1132 | int prio, static_prio, normal_prio; |
c7aceaba | 1133 | unsigned int rt_priority; |
5522d5d5 | 1134 | const struct sched_class *sched_class; |
20b8a59f | 1135 | struct sched_entity se; |
fa717060 | 1136 | struct sched_rt_entity rt; |
1da177e4 | 1137 | |
e107be36 AK |
1138 | #ifdef CONFIG_PREEMPT_NOTIFIERS |
1139 | /* list of struct preempt_notifier: */ | |
1140 | struct hlist_head preempt_notifiers; | |
1141 | #endif | |
1142 | ||
18796aa0 AD |
1143 | /* |
1144 | * fpu_counter contains the number of consecutive context switches | |
1145 | * that the FPU is used. If this is over a threshold, the lazy fpu | |
1146 | * saving becomes unlazy to save the trap. This is an unsigned char | |
1147 | * so that after 256 times the counter wraps and the behavior turns | |
1148 | * lazy again; this to deal with bursty apps that only use FPU for | |
1149 | * a short time | |
1150 | */ | |
1151 | unsigned char fpu_counter; | |
1152 | s8 oomkilladj; /* OOM kill score adjustment (bit shift). */ | |
6c5c9341 | 1153 | #ifdef CONFIG_BLK_DEV_IO_TRACE |
2056a782 | 1154 | unsigned int btrace_seq; |
6c5c9341 | 1155 | #endif |
1da177e4 | 1156 | |
97dc32cd | 1157 | unsigned int policy; |
1da177e4 | 1158 | cpumask_t cpus_allowed; |
1da177e4 | 1159 | |
e260be67 PM |
1160 | #ifdef CONFIG_PREEMPT_RCU |
1161 | int rcu_read_lock_nesting; | |
1162 | int rcu_flipctr_idx; | |
1163 | #endif /* #ifdef CONFIG_PREEMPT_RCU */ | |
1164 | ||
52f17b6c | 1165 | #if defined(CONFIG_SCHEDSTATS) || defined(CONFIG_TASK_DELAY_ACCT) |
1da177e4 LT |
1166 | struct sched_info sched_info; |
1167 | #endif | |
1168 | ||
1169 | struct list_head tasks; | |
917b627d | 1170 | struct plist_node pushable_tasks; |
1da177e4 LT |
1171 | |
1172 | struct mm_struct *mm, *active_mm; | |
1173 | ||
1174 | /* task state */ | |
1175 | struct linux_binfmt *binfmt; | |
97dc32cd | 1176 | int exit_state; |
1da177e4 LT |
1177 | int exit_code, exit_signal; |
1178 | int pdeath_signal; /* The signal sent when the parent dies */ | |
1179 | /* ??? */ | |
97dc32cd | 1180 | unsigned int personality; |
1da177e4 | 1181 | unsigned did_exec:1; |
f9ce1f1c KT |
1182 | unsigned in_execve:1; /* Tell the LSMs that the process is doing an |
1183 | * execve */ | |
1da177e4 LT |
1184 | pid_t pid; |
1185 | pid_t tgid; | |
0a425405 | 1186 | |
0a425405 AV |
1187 | /* Canary value for the -fstack-protector gcc feature */ |
1188 | unsigned long stack_canary; | |
e0032087 | 1189 | |
1da177e4 LT |
1190 | /* |
1191 | * pointers to (original) parent process, youngest child, younger sibling, | |
1192 | * older sibling, respectively. (p->father can be replaced with | |
f470021a | 1193 | * p->real_parent->pid) |
1da177e4 | 1194 | */ |
f470021a RM |
1195 | struct task_struct *real_parent; /* real parent process */ |
1196 | struct task_struct *parent; /* recipient of SIGCHLD, wait4() reports */ | |
1da177e4 | 1197 | /* |
f470021a | 1198 | * children/sibling forms the list of my natural children |
1da177e4 LT |
1199 | */ |
1200 | struct list_head children; /* list of my children */ | |
1201 | struct list_head sibling; /* linkage in my parent's children list */ | |
1202 | struct task_struct *group_leader; /* threadgroup leader */ | |
1203 | ||
f470021a RM |
1204 | /* |
1205 | * ptraced is the list of tasks this task is using ptrace on. | |
1206 | * This includes both natural children and PTRACE_ATTACH targets. | |
1207 | * p->ptrace_entry is p's link on the p->parent->ptraced list. | |
1208 | */ | |
1209 | struct list_head ptraced; | |
1210 | struct list_head ptrace_entry; | |
1211 | ||
ca0002a1 MM |
1212 | #ifdef CONFIG_X86_PTRACE_BTS |
1213 | /* | |
1214 | * This is the tracer handle for the ptrace BTS extension. | |
1215 | * This field actually belongs to the ptracer task. | |
1216 | */ | |
1217 | struct bts_tracer *bts; | |
6abb11ae MM |
1218 | /* |
1219 | * The buffer to hold the BTS data. | |
1220 | */ | |
1221 | void *bts_buffer; | |
c2724775 | 1222 | size_t bts_size; |
ca0002a1 MM |
1223 | #endif /* CONFIG_X86_PTRACE_BTS */ |
1224 | ||
1da177e4 | 1225 | /* PID/PID hash table linkage. */ |
92476d7f | 1226 | struct pid_link pids[PIDTYPE_MAX]; |
47e65328 | 1227 | struct list_head thread_group; |
1da177e4 LT |
1228 | |
1229 | struct completion *vfork_done; /* for vfork() */ | |
1230 | int __user *set_child_tid; /* CLONE_CHILD_SETTID */ | |
1231 | int __user *clear_child_tid; /* CLONE_CHILD_CLEARTID */ | |
1232 | ||
c66f08be | 1233 | cputime_t utime, stime, utimescaled, stimescaled; |
9ac52315 | 1234 | cputime_t gtime; |
9301899b | 1235 | cputime_t prev_utime, prev_stime; |
1da177e4 | 1236 | unsigned long nvcsw, nivcsw; /* context switch counts */ |
924b42d5 TJ |
1237 | struct timespec start_time; /* monotonic time */ |
1238 | struct timespec real_start_time; /* boot based time */ | |
1da177e4 LT |
1239 | /* mm fault and swap info: this can arguably be seen as either mm-specific or thread-specific */ |
1240 | unsigned long min_flt, maj_flt; | |
1241 | ||
f06febc9 | 1242 | struct task_cputime cputime_expires; |
1da177e4 LT |
1243 | struct list_head cpu_timers[3]; |
1244 | ||
1245 | /* process credentials */ | |
3b11a1de DH |
1246 | const struct cred *real_cred; /* objective and real subjective task |
1247 | * credentials (COW) */ | |
1248 | const struct cred *cred; /* effective (overridable) subjective task | |
1249 | * credentials (COW) */ | |
d84f4f99 | 1250 | struct mutex cred_exec_mutex; /* execve vs ptrace cred calculation mutex */ |
b6dff3ec | 1251 | |
36772092 PBG |
1252 | char comm[TASK_COMM_LEN]; /* executable name excluding path |
1253 | - access with [gs]et_task_comm (which lock | |
1254 | it with task_lock()) | |
1255 | - initialized normally by flush_old_exec */ | |
1da177e4 LT |
1256 | /* file system info */ |
1257 | int link_count, total_link_count; | |
3d5b6fcc | 1258 | #ifdef CONFIG_SYSVIPC |
1da177e4 LT |
1259 | /* ipc stuff */ |
1260 | struct sysv_sem sysvsem; | |
3d5b6fcc | 1261 | #endif |
e162b39a | 1262 | #ifdef CONFIG_DETECT_HUNG_TASK |
82a1fcb9 | 1263 | /* hung task detection */ |
82a1fcb9 IM |
1264 | unsigned long last_switch_count; |
1265 | #endif | |
1da177e4 LT |
1266 | /* CPU-specific state of this task */ |
1267 | struct thread_struct thread; | |
1268 | /* filesystem information */ | |
1269 | struct fs_struct *fs; | |
1270 | /* open file information */ | |
1271 | struct files_struct *files; | |
1651e14e | 1272 | /* namespaces */ |
ab516013 | 1273 | struct nsproxy *nsproxy; |
1da177e4 LT |
1274 | /* signal handlers */ |
1275 | struct signal_struct *signal; | |
1276 | struct sighand_struct *sighand; | |
1277 | ||
1278 | sigset_t blocked, real_blocked; | |
f3de272b | 1279 | sigset_t saved_sigmask; /* restored if set_restore_sigmask() was used */ |
1da177e4 LT |
1280 | struct sigpending pending; |
1281 | ||
1282 | unsigned long sas_ss_sp; | |
1283 | size_t sas_ss_size; | |
1284 | int (*notifier)(void *priv); | |
1285 | void *notifier_data; | |
1286 | sigset_t *notifier_mask; | |
1da177e4 | 1287 | struct audit_context *audit_context; |
bfef93a5 AV |
1288 | #ifdef CONFIG_AUDITSYSCALL |
1289 | uid_t loginuid; | |
4746ec5b | 1290 | unsigned int sessionid; |
bfef93a5 | 1291 | #endif |
1da177e4 LT |
1292 | seccomp_t seccomp; |
1293 | ||
1294 | /* Thread group tracking */ | |
1295 | u32 parent_exec_id; | |
1296 | u32 self_exec_id; | |
1297 | /* Protection of (de-)allocation: mm, files, fs, tty, keyrings */ | |
1298 | spinlock_t alloc_lock; | |
1da177e4 | 1299 | |
3aa551c9 TG |
1300 | #ifdef CONFIG_GENERIC_HARDIRQS |
1301 | /* IRQ handler threads */ | |
1302 | struct irqaction *irqaction; | |
1303 | #endif | |
1304 | ||
b29739f9 IM |
1305 | /* Protection of the PI data structures: */ |
1306 | spinlock_t pi_lock; | |
1307 | ||
23f78d4a IM |
1308 | #ifdef CONFIG_RT_MUTEXES |
1309 | /* PI waiters blocked on a rt_mutex held by this task */ | |
1310 | struct plist_head pi_waiters; | |
1311 | /* Deadlock detection and priority inheritance handling */ | |
1312 | struct rt_mutex_waiter *pi_blocked_on; | |
23f78d4a IM |
1313 | #endif |
1314 | ||
408894ee IM |
1315 | #ifdef CONFIG_DEBUG_MUTEXES |
1316 | /* mutex deadlock detection */ | |
1317 | struct mutex_waiter *blocked_on; | |
1318 | #endif | |
de30a2b3 IM |
1319 | #ifdef CONFIG_TRACE_IRQFLAGS |
1320 | unsigned int irq_events; | |
1321 | int hardirqs_enabled; | |
1322 | unsigned long hardirq_enable_ip; | |
1323 | unsigned int hardirq_enable_event; | |
1324 | unsigned long hardirq_disable_ip; | |
1325 | unsigned int hardirq_disable_event; | |
1326 | int softirqs_enabled; | |
1327 | unsigned long softirq_disable_ip; | |
1328 | unsigned int softirq_disable_event; | |
1329 | unsigned long softirq_enable_ip; | |
1330 | unsigned int softirq_enable_event; | |
1331 | int hardirq_context; | |
1332 | int softirq_context; | |
1333 | #endif | |
fbb9ce95 | 1334 | #ifdef CONFIG_LOCKDEP |
bdb9441e | 1335 | # define MAX_LOCK_DEPTH 48UL |
fbb9ce95 IM |
1336 | u64 curr_chain_key; |
1337 | int lockdep_depth; | |
fbb9ce95 | 1338 | unsigned int lockdep_recursion; |
c7aceaba | 1339 | struct held_lock held_locks[MAX_LOCK_DEPTH]; |
cf40bd16 | 1340 | gfp_t lockdep_reclaim_gfp; |
fbb9ce95 | 1341 | #endif |
408894ee | 1342 | |
1da177e4 LT |
1343 | /* journalling filesystem info */ |
1344 | void *journal_info; | |
1345 | ||
d89d8796 NB |
1346 | /* stacked block device info */ |
1347 | struct bio *bio_list, **bio_tail; | |
1348 | ||
1da177e4 LT |
1349 | /* VM state */ |
1350 | struct reclaim_state *reclaim_state; | |
1351 | ||
1da177e4 LT |
1352 | struct backing_dev_info *backing_dev_info; |
1353 | ||
1354 | struct io_context *io_context; | |
1355 | ||
1356 | unsigned long ptrace_message; | |
1357 | siginfo_t *last_siginfo; /* For ptrace use. */ | |
7c3ab738 | 1358 | struct task_io_accounting ioac; |
8f0ab514 | 1359 | #if defined(CONFIG_TASK_XACCT) |
1da177e4 LT |
1360 | u64 acct_rss_mem1; /* accumulated rss usage */ |
1361 | u64 acct_vm_mem1; /* accumulated virtual memory usage */ | |
49b5cf34 | 1362 | cputime_t acct_timexpd; /* stime + utime since last update */ |
1da177e4 LT |
1363 | #endif |
1364 | #ifdef CONFIG_CPUSETS | |
1da177e4 LT |
1365 | nodemask_t mems_allowed; |
1366 | int cpuset_mems_generation; | |
825a46af | 1367 | int cpuset_mem_spread_rotor; |
1da177e4 | 1368 | #endif |
ddbcc7e8 | 1369 | #ifdef CONFIG_CGROUPS |
817929ec PM |
1370 | /* Control Group info protected by css_set_lock */ |
1371 | struct css_set *cgroups; | |
1372 | /* cg_list protected by css_set_lock and tsk->alloc_lock */ | |
1373 | struct list_head cg_list; | |
ddbcc7e8 | 1374 | #endif |
42b2dd0a | 1375 | #ifdef CONFIG_FUTEX |
0771dfef | 1376 | struct robust_list_head __user *robust_list; |
34f192c6 IM |
1377 | #ifdef CONFIG_COMPAT |
1378 | struct compat_robust_list_head __user *compat_robust_list; | |
1379 | #endif | |
c87e2837 IM |
1380 | struct list_head pi_state_list; |
1381 | struct futex_pi_state *pi_state_cache; | |
c7aceaba RK |
1382 | #endif |
1383 | #ifdef CONFIG_NUMA | |
1384 | struct mempolicy *mempolicy; | |
1385 | short il_next; | |
42b2dd0a | 1386 | #endif |
22e2c507 | 1387 | atomic_t fs_excl; /* holding fs exclusive resources */ |
e56d0903 | 1388 | struct rcu_head rcu; |
b92ce558 JA |
1389 | |
1390 | /* | |
1391 | * cache last used pipe for splice | |
1392 | */ | |
1393 | struct pipe_inode_info *splice_pipe; | |
ca74e92b SN |
1394 | #ifdef CONFIG_TASK_DELAY_ACCT |
1395 | struct task_delay_info *delays; | |
f4f154fd AM |
1396 | #endif |
1397 | #ifdef CONFIG_FAULT_INJECTION | |
1398 | int make_it_fail; | |
ca74e92b | 1399 | #endif |
3e26c149 | 1400 | struct prop_local_single dirties; |
9745512c AV |
1401 | #ifdef CONFIG_LATENCYTOP |
1402 | int latency_record_count; | |
1403 | struct latency_record latency_record[LT_SAVECOUNT]; | |
1404 | #endif | |
6976675d AV |
1405 | /* |
1406 | * time slack values; these are used to round up poll() and | |
1407 | * select() etc timeout values. These are in nanoseconds. | |
1408 | */ | |
1409 | unsigned long timer_slack_ns; | |
1410 | unsigned long default_timer_slack_ns; | |
f8d570a4 DM |
1411 | |
1412 | struct list_head *scm_work_list; | |
fb52607a | 1413 | #ifdef CONFIG_FUNCTION_GRAPH_TRACER |
f201ae23 FW |
1414 | /* Index of current stored adress in ret_stack */ |
1415 | int curr_ret_stack; | |
1416 | /* Stack of return addresses for return function tracing */ | |
1417 | struct ftrace_ret_stack *ret_stack; | |
8aef2d28 SR |
1418 | /* time stamp for last schedule */ |
1419 | unsigned long long ftrace_timestamp; | |
f201ae23 FW |
1420 | /* |
1421 | * Number of functions that haven't been traced | |
1422 | * because of depth overrun. | |
1423 | */ | |
1424 | atomic_t trace_overrun; | |
380c4b14 FW |
1425 | /* Pause for the tracing */ |
1426 | atomic_t tracing_graph_pause; | |
f201ae23 | 1427 | #endif |
ea4e2bc4 SR |
1428 | #ifdef CONFIG_TRACING |
1429 | /* state flags for use by tracers */ | |
1430 | unsigned long trace; | |
9745512c | 1431 | #endif |
1da177e4 LT |
1432 | }; |
1433 | ||
76e6eee0 RR |
1434 | /* Future-safe accessor for struct task_struct's cpus_allowed. */ |
1435 | #define tsk_cpumask(tsk) (&(tsk)->cpus_allowed) | |
1436 | ||
e05606d3 IM |
1437 | /* |
1438 | * Priority of a process goes from 0..MAX_PRIO-1, valid RT | |
1439 | * priority is 0..MAX_RT_PRIO-1, and SCHED_NORMAL/SCHED_BATCH | |
1440 | * tasks are in the range MAX_RT_PRIO..MAX_PRIO-1. Priority | |
1441 | * values are inverted: lower p->prio value means higher priority. | |
1442 | * | |
1443 | * The MAX_USER_RT_PRIO value allows the actual maximum | |
1444 | * RT priority to be separate from the value exported to | |
1445 | * user-space. This allows kernel threads to set their | |
1446 | * priority to a value higher than any user task. Note: | |
1447 | * MAX_RT_PRIO must not be smaller than MAX_USER_RT_PRIO. | |
1448 | */ | |
1449 | ||
1450 | #define MAX_USER_RT_PRIO 100 | |
1451 | #define MAX_RT_PRIO MAX_USER_RT_PRIO | |
1452 | ||
1453 | #define MAX_PRIO (MAX_RT_PRIO + 40) | |
1454 | #define DEFAULT_PRIO (MAX_RT_PRIO + 20) | |
1455 | ||
1456 | static inline int rt_prio(int prio) | |
1457 | { | |
1458 | if (unlikely(prio < MAX_RT_PRIO)) | |
1459 | return 1; | |
1460 | return 0; | |
1461 | } | |
1462 | ||
e868171a | 1463 | static inline int rt_task(struct task_struct *p) |
e05606d3 IM |
1464 | { |
1465 | return rt_prio(p->prio); | |
1466 | } | |
1467 | ||
e868171a | 1468 | static inline struct pid *task_pid(struct task_struct *task) |
22c935f4 EB |
1469 | { |
1470 | return task->pids[PIDTYPE_PID].pid; | |
1471 | } | |
1472 | ||
e868171a | 1473 | static inline struct pid *task_tgid(struct task_struct *task) |
22c935f4 EB |
1474 | { |
1475 | return task->group_leader->pids[PIDTYPE_PID].pid; | |
1476 | } | |
1477 | ||
6dda81f4 ON |
1478 | /* |
1479 | * Without tasklist or rcu lock it is not safe to dereference | |
1480 | * the result of task_pgrp/task_session even if task == current, | |
1481 | * we can race with another thread doing sys_setsid/sys_setpgid. | |
1482 | */ | |
e868171a | 1483 | static inline struct pid *task_pgrp(struct task_struct *task) |
22c935f4 EB |
1484 | { |
1485 | return task->group_leader->pids[PIDTYPE_PGID].pid; | |
1486 | } | |
1487 | ||
e868171a | 1488 | static inline struct pid *task_session(struct task_struct *task) |
22c935f4 EB |
1489 | { |
1490 | return task->group_leader->pids[PIDTYPE_SID].pid; | |
1491 | } | |
1492 | ||
7af57294 PE |
1493 | struct pid_namespace; |
1494 | ||
1495 | /* | |
1496 | * the helpers to get the task's different pids as they are seen | |
1497 | * from various namespaces | |
1498 | * | |
1499 | * task_xid_nr() : global id, i.e. the id seen from the init namespace; | |
44c4e1b2 EB |
1500 | * task_xid_vnr() : virtual id, i.e. the id seen from the pid namespace of |
1501 | * current. | |
7af57294 PE |
1502 | * task_xid_nr_ns() : id seen from the ns specified; |
1503 | * | |
1504 | * set_task_vxid() : assigns a virtual id to a task; | |
1505 | * | |
7af57294 PE |
1506 | * see also pid_nr() etc in include/linux/pid.h |
1507 | */ | |
52ee2dfd ON |
1508 | pid_t __task_pid_nr_ns(struct task_struct *task, enum pid_type type, |
1509 | struct pid_namespace *ns); | |
7af57294 | 1510 | |
e868171a | 1511 | static inline pid_t task_pid_nr(struct task_struct *tsk) |
7af57294 PE |
1512 | { |
1513 | return tsk->pid; | |
1514 | } | |
1515 | ||
52ee2dfd ON |
1516 | static inline pid_t task_pid_nr_ns(struct task_struct *tsk, |
1517 | struct pid_namespace *ns) | |
1518 | { | |
1519 | return __task_pid_nr_ns(tsk, PIDTYPE_PID, ns); | |
1520 | } | |
7af57294 PE |
1521 | |
1522 | static inline pid_t task_pid_vnr(struct task_struct *tsk) | |
1523 | { | |
52ee2dfd | 1524 | return __task_pid_nr_ns(tsk, PIDTYPE_PID, NULL); |
7af57294 PE |
1525 | } |
1526 | ||
1527 | ||
e868171a | 1528 | static inline pid_t task_tgid_nr(struct task_struct *tsk) |
7af57294 PE |
1529 | { |
1530 | return tsk->tgid; | |
1531 | } | |
1532 | ||
2f2a3a46 | 1533 | pid_t task_tgid_nr_ns(struct task_struct *tsk, struct pid_namespace *ns); |
7af57294 PE |
1534 | |
1535 | static inline pid_t task_tgid_vnr(struct task_struct *tsk) | |
1536 | { | |
1537 | return pid_vnr(task_tgid(tsk)); | |
1538 | } | |
1539 | ||
1540 | ||
52ee2dfd ON |
1541 | static inline pid_t task_pgrp_nr_ns(struct task_struct *tsk, |
1542 | struct pid_namespace *ns) | |
7af57294 | 1543 | { |
52ee2dfd | 1544 | return __task_pid_nr_ns(tsk, PIDTYPE_PGID, ns); |
7af57294 PE |
1545 | } |
1546 | ||
7af57294 PE |
1547 | static inline pid_t task_pgrp_vnr(struct task_struct *tsk) |
1548 | { | |
52ee2dfd | 1549 | return __task_pid_nr_ns(tsk, PIDTYPE_PGID, NULL); |
7af57294 PE |
1550 | } |
1551 | ||
1552 | ||
52ee2dfd ON |
1553 | static inline pid_t task_session_nr_ns(struct task_struct *tsk, |
1554 | struct pid_namespace *ns) | |
7af57294 | 1555 | { |
52ee2dfd | 1556 | return __task_pid_nr_ns(tsk, PIDTYPE_SID, ns); |
7af57294 PE |
1557 | } |
1558 | ||
7af57294 PE |
1559 | static inline pid_t task_session_vnr(struct task_struct *tsk) |
1560 | { | |
52ee2dfd | 1561 | return __task_pid_nr_ns(tsk, PIDTYPE_SID, NULL); |
7af57294 PE |
1562 | } |
1563 | ||
1b0f7ffd ON |
1564 | /* obsolete, do not use */ |
1565 | static inline pid_t task_pgrp_nr(struct task_struct *tsk) | |
1566 | { | |
1567 | return task_pgrp_nr_ns(tsk, &init_pid_ns); | |
1568 | } | |
7af57294 | 1569 | |
1da177e4 LT |
1570 | /** |
1571 | * pid_alive - check that a task structure is not stale | |
1572 | * @p: Task structure to be checked. | |
1573 | * | |
1574 | * Test if a process is not yet dead (at most zombie state) | |
1575 | * If pid_alive fails, then pointers within the task structure | |
1576 | * can be stale and must not be dereferenced. | |
1577 | */ | |
e868171a | 1578 | static inline int pid_alive(struct task_struct *p) |
1da177e4 | 1579 | { |
92476d7f | 1580 | return p->pids[PIDTYPE_PID].pid != NULL; |
1da177e4 LT |
1581 | } |
1582 | ||
f400e198 | 1583 | /** |
b460cbc5 | 1584 | * is_global_init - check if a task structure is init |
3260259f H |
1585 | * @tsk: Task structure to be checked. |
1586 | * | |
1587 | * Check if a task structure is the first user space task the kernel created. | |
b460cbc5 | 1588 | */ |
e868171a | 1589 | static inline int is_global_init(struct task_struct *tsk) |
b461cc03 PE |
1590 | { |
1591 | return tsk->pid == 1; | |
1592 | } | |
b460cbc5 SH |
1593 | |
1594 | /* | |
1595 | * is_container_init: | |
1596 | * check whether in the task is init in its own pid namespace. | |
f400e198 | 1597 | */ |
b461cc03 | 1598 | extern int is_container_init(struct task_struct *tsk); |
f400e198 | 1599 | |
9ec52099 CLG |
1600 | extern struct pid *cad_pid; |
1601 | ||
1da177e4 | 1602 | extern void free_task(struct task_struct *tsk); |
1da177e4 | 1603 | #define get_task_struct(tsk) do { atomic_inc(&(tsk)->usage); } while(0) |
e56d0903 | 1604 | |
158d9ebd | 1605 | extern void __put_task_struct(struct task_struct *t); |
e56d0903 IM |
1606 | |
1607 | static inline void put_task_struct(struct task_struct *t) | |
1608 | { | |
1609 | if (atomic_dec_and_test(&t->usage)) | |
8c7904a0 | 1610 | __put_task_struct(t); |
e56d0903 | 1611 | } |
1da177e4 | 1612 | |
49048622 BS |
1613 | extern cputime_t task_utime(struct task_struct *p); |
1614 | extern cputime_t task_stime(struct task_struct *p); | |
1615 | extern cputime_t task_gtime(struct task_struct *p); | |
1616 | ||
1da177e4 LT |
1617 | /* |
1618 | * Per process flags | |
1619 | */ | |
1620 | #define PF_ALIGNWARN 0x00000001 /* Print alignment warning msgs */ | |
1621 | /* Not implemented yet, only for 486*/ | |
1622 | #define PF_STARTING 0x00000002 /* being created */ | |
1623 | #define PF_EXITING 0x00000004 /* getting shut down */ | |
778e9a9c | 1624 | #define PF_EXITPIDONE 0x00000008 /* pi exit done on shut down */ |
94886b84 | 1625 | #define PF_VCPU 0x00000010 /* I'm a virtual CPU */ |
1da177e4 LT |
1626 | #define PF_FORKNOEXEC 0x00000040 /* forked but didn't exec */ |
1627 | #define PF_SUPERPRIV 0x00000100 /* used super-user privileges */ | |
1628 | #define PF_DUMPCORE 0x00000200 /* dumped core */ | |
1629 | #define PF_SIGNALED 0x00000400 /* killed by a signal */ | |
1630 | #define PF_MEMALLOC 0x00000800 /* Allocating memory */ | |
1631 | #define PF_FLUSHER 0x00001000 /* responsible for disk writeback */ | |
1632 | #define PF_USED_MATH 0x00002000 /* if unset the fpu must be initialized before use */ | |
1da177e4 LT |
1633 | #define PF_NOFREEZE 0x00008000 /* this thread should not be frozen */ |
1634 | #define PF_FROZEN 0x00010000 /* frozen for system suspend */ | |
1635 | #define PF_FSTRANS 0x00020000 /* inside a filesystem transaction */ | |
1636 | #define PF_KSWAPD 0x00040000 /* I am kswapd */ | |
1637 | #define PF_SWAPOFF 0x00080000 /* I am in swapoff */ | |
1638 | #define PF_LESS_THROTTLE 0x00100000 /* Throttle me less: I clean memory */ | |
246bb0b1 | 1639 | #define PF_KTHREAD 0x00200000 /* I am a kernel thread */ |
b31dc66a JA |
1640 | #define PF_RANDOMIZE 0x00400000 /* randomize virtual address space */ |
1641 | #define PF_SWAPWRITE 0x00800000 /* Allowed to write to swap */ | |
1642 | #define PF_SPREAD_PAGE 0x01000000 /* Spread page cache over cpuset */ | |
1643 | #define PF_SPREAD_SLAB 0x02000000 /* Spread some slab caches over cpuset */ | |
9985b0ba | 1644 | #define PF_THREAD_BOUND 0x04000000 /* Thread bound to specific cpu */ |
c61afb18 | 1645 | #define PF_MEMPOLICY 0x10000000 /* Non-default NUMA mempolicy */ |
61a87122 | 1646 | #define PF_MUTEX_TESTER 0x20000000 /* Thread belongs to the rt mutex tester */ |
ba96a0c8 | 1647 | #define PF_FREEZER_SKIP 0x40000000 /* Freezer should not count it as freezeable */ |
ebb12db5 | 1648 | #define PF_FREEZER_NOSIG 0x80000000 /* Freezer won't send signals to it */ |
1da177e4 LT |
1649 | |
1650 | /* | |
1651 | * Only the _current_ task can read/write to tsk->flags, but other | |
1652 | * tasks can access tsk->flags in readonly mode for example | |
1653 | * with tsk_used_math (like during threaded core dumping). | |
1654 | * There is however an exception to this rule during ptrace | |
1655 | * or during fork: the ptracer task is allowed to write to the | |
1656 | * child->flags of its traced child (same goes for fork, the parent | |
1657 | * can write to the child->flags), because we're guaranteed the | |
1658 | * child is not running and in turn not changing child->flags | |
1659 | * at the same time the parent does it. | |
1660 | */ | |
1661 | #define clear_stopped_child_used_math(child) do { (child)->flags &= ~PF_USED_MATH; } while (0) | |
1662 | #define set_stopped_child_used_math(child) do { (child)->flags |= PF_USED_MATH; } while (0) | |
1663 | #define clear_used_math() clear_stopped_child_used_math(current) | |
1664 | #define set_used_math() set_stopped_child_used_math(current) | |
1665 | #define conditional_stopped_child_used_math(condition, child) \ | |
1666 | do { (child)->flags &= ~PF_USED_MATH, (child)->flags |= (condition) ? PF_USED_MATH : 0; } while (0) | |
1667 | #define conditional_used_math(condition) \ | |
1668 | conditional_stopped_child_used_math(condition, current) | |
1669 | #define copy_to_stopped_child_used_math(child) \ | |
1670 | do { (child)->flags &= ~PF_USED_MATH, (child)->flags |= current->flags & PF_USED_MATH; } while (0) | |
1671 | /* NOTE: this will return 0 or PF_USED_MATH, it will never return 1 */ | |
1672 | #define tsk_used_math(p) ((p)->flags & PF_USED_MATH) | |
1673 | #define used_math() tsk_used_math(current) | |
1674 | ||
1675 | #ifdef CONFIG_SMP | |
cd8ba7cd | 1676 | extern int set_cpus_allowed_ptr(struct task_struct *p, |
96f874e2 | 1677 | const struct cpumask *new_mask); |
1da177e4 | 1678 | #else |
cd8ba7cd | 1679 | static inline int set_cpus_allowed_ptr(struct task_struct *p, |
96f874e2 | 1680 | const struct cpumask *new_mask) |
1da177e4 | 1681 | { |
96f874e2 | 1682 | if (!cpumask_test_cpu(0, new_mask)) |
1da177e4 LT |
1683 | return -EINVAL; |
1684 | return 0; | |
1685 | } | |
1686 | #endif | |
cd8ba7cd MT |
1687 | static inline int set_cpus_allowed(struct task_struct *p, cpumask_t new_mask) |
1688 | { | |
1689 | return set_cpus_allowed_ptr(p, &new_mask); | |
1690 | } | |
1da177e4 | 1691 | |
b342501c IM |
1692 | /* |
1693 | * Architectures can set this to 1 if they have specified | |
1694 | * CONFIG_HAVE_UNSTABLE_SCHED_CLOCK in their arch Kconfig, | |
1695 | * but then during bootup it turns out that sched_clock() | |
1696 | * is reliable after all: | |
1697 | */ | |
1698 | #ifdef CONFIG_HAVE_UNSTABLE_SCHED_CLOCK | |
1699 | extern int sched_clock_stable; | |
1700 | #endif | |
1701 | ||
1da177e4 | 1702 | extern unsigned long long sched_clock(void); |
e436d800 | 1703 | |
c1955a3d PZ |
1704 | extern void sched_clock_init(void); |
1705 | extern u64 sched_clock_cpu(int cpu); | |
3e51f33f | 1706 | |
c1955a3d | 1707 | #ifndef CONFIG_HAVE_UNSTABLE_SCHED_CLOCK |
3e51f33f PZ |
1708 | static inline void sched_clock_tick(void) |
1709 | { | |
1710 | } | |
1711 | ||
1712 | static inline void sched_clock_idle_sleep_event(void) | |
1713 | { | |
1714 | } | |
1715 | ||
1716 | static inline void sched_clock_idle_wakeup_event(u64 delta_ns) | |
1717 | { | |
1718 | } | |
1719 | #else | |
3e51f33f PZ |
1720 | extern void sched_clock_tick(void); |
1721 | extern void sched_clock_idle_sleep_event(void); | |
1722 | extern void sched_clock_idle_wakeup_event(u64 delta_ns); | |
1723 | #endif | |
1724 | ||
e436d800 IM |
1725 | /* |
1726 | * For kernel-internal use: high-speed (but slightly incorrect) per-cpu | |
1727 | * clock constructed from sched_clock(): | |
1728 | */ | |
1729 | extern unsigned long long cpu_clock(int cpu); | |
1730 | ||
36c8b586 | 1731 | extern unsigned long long |
41b86e9c | 1732 | task_sched_runtime(struct task_struct *task); |
f06febc9 | 1733 | extern unsigned long long thread_group_sched_runtime(struct task_struct *task); |
1da177e4 LT |
1734 | |
1735 | /* sched_exec is called by processes performing an exec */ | |
1736 | #ifdef CONFIG_SMP | |
1737 | extern void sched_exec(void); | |
1738 | #else | |
1739 | #define sched_exec() {} | |
1740 | #endif | |
1741 | ||
2aa44d05 IM |
1742 | extern void sched_clock_idle_sleep_event(void); |
1743 | extern void sched_clock_idle_wakeup_event(u64 delta_ns); | |
bb29ab26 | 1744 | |
1da177e4 LT |
1745 | #ifdef CONFIG_HOTPLUG_CPU |
1746 | extern void idle_task_exit(void); | |
1747 | #else | |
1748 | static inline void idle_task_exit(void) {} | |
1749 | #endif | |
1750 | ||
1751 | extern void sched_idle_next(void); | |
b29739f9 | 1752 | |
06d8308c TG |
1753 | #if defined(CONFIG_NO_HZ) && defined(CONFIG_SMP) |
1754 | extern void wake_up_idle_cpu(int cpu); | |
1755 | #else | |
1756 | static inline void wake_up_idle_cpu(int cpu) { } | |
1757 | #endif | |
1758 | ||
21805085 | 1759 | extern unsigned int sysctl_sched_latency; |
b2be5e96 | 1760 | extern unsigned int sysctl_sched_min_granularity; |
bf0f6f24 | 1761 | extern unsigned int sysctl_sched_wakeup_granularity; |
47fea2ad JSR |
1762 | extern unsigned int sysctl_sched_shares_ratelimit; |
1763 | extern unsigned int sysctl_sched_shares_thresh; | |
1764 | #ifdef CONFIG_SCHED_DEBUG | |
bf0f6f24 IM |
1765 | extern unsigned int sysctl_sched_child_runs_first; |
1766 | extern unsigned int sysctl_sched_features; | |
da84d961 | 1767 | extern unsigned int sysctl_sched_migration_cost; |
b82d9fdd | 1768 | extern unsigned int sysctl_sched_nr_migrate; |
b2be5e96 PZ |
1769 | |
1770 | int sched_nr_latency_handler(struct ctl_table *table, int write, | |
1771 | struct file *file, void __user *buffer, size_t *length, | |
1772 | loff_t *ppos); | |
2bd8e6d4 | 1773 | #endif |
9f0c1e56 PZ |
1774 | extern unsigned int sysctl_sched_rt_period; |
1775 | extern int sysctl_sched_rt_runtime; | |
2bd8e6d4 | 1776 | |
d0b27fa7 PZ |
1777 | int sched_rt_handler(struct ctl_table *table, int write, |
1778 | struct file *filp, void __user *buffer, size_t *lenp, | |
1779 | loff_t *ppos); | |
1780 | ||
2bd8e6d4 | 1781 | extern unsigned int sysctl_sched_compat_yield; |
bf0f6f24 | 1782 | |
b29739f9 | 1783 | #ifdef CONFIG_RT_MUTEXES |
36c8b586 IM |
1784 | extern int rt_mutex_getprio(struct task_struct *p); |
1785 | extern void rt_mutex_setprio(struct task_struct *p, int prio); | |
1786 | extern void rt_mutex_adjust_pi(struct task_struct *p); | |
b29739f9 | 1787 | #else |
e868171a | 1788 | static inline int rt_mutex_getprio(struct task_struct *p) |
b29739f9 IM |
1789 | { |
1790 | return p->normal_prio; | |
1791 | } | |
95e02ca9 | 1792 | # define rt_mutex_adjust_pi(p) do { } while (0) |
b29739f9 IM |
1793 | #endif |
1794 | ||
36c8b586 IM |
1795 | extern void set_user_nice(struct task_struct *p, long nice); |
1796 | extern int task_prio(const struct task_struct *p); | |
1797 | extern int task_nice(const struct task_struct *p); | |
1798 | extern int can_nice(const struct task_struct *p, const int nice); | |
1799 | extern int task_curr(const struct task_struct *p); | |
1da177e4 LT |
1800 | extern int idle_cpu(int cpu); |
1801 | extern int sched_setscheduler(struct task_struct *, int, struct sched_param *); | |
961ccddd RR |
1802 | extern int sched_setscheduler_nocheck(struct task_struct *, int, |
1803 | struct sched_param *); | |
36c8b586 IM |
1804 | extern struct task_struct *idle_task(int cpu); |
1805 | extern struct task_struct *curr_task(int cpu); | |
1806 | extern void set_curr_task(int cpu, struct task_struct *p); | |
1da177e4 LT |
1807 | |
1808 | void yield(void); | |
1809 | ||
1810 | /* | |
1811 | * The default (Linux) execution domain. | |
1812 | */ | |
1813 | extern struct exec_domain default_exec_domain; | |
1814 | ||
1815 | union thread_union { | |
1816 | struct thread_info thread_info; | |
1817 | unsigned long stack[THREAD_SIZE/sizeof(long)]; | |
1818 | }; | |
1819 | ||
1820 | #ifndef __HAVE_ARCH_KSTACK_END | |
1821 | static inline int kstack_end(void *addr) | |
1822 | { | |
1823 | /* Reliable end of stack detection: | |
1824 | * Some APM bios versions misalign the stack | |
1825 | */ | |
1826 | return !(((unsigned long)addr+sizeof(void*)-1) & (THREAD_SIZE-sizeof(void*))); | |
1827 | } | |
1828 | #endif | |
1829 | ||
1830 | extern union thread_union init_thread_union; | |
1831 | extern struct task_struct init_task; | |
1832 | ||
1833 | extern struct mm_struct init_mm; | |
1834 | ||
198fe21b PE |
1835 | extern struct pid_namespace init_pid_ns; |
1836 | ||
1837 | /* | |
1838 | * find a task by one of its numerical ids | |
1839 | * | |
1840 | * find_task_by_pid_type_ns(): | |
1841 | * it is the most generic call - it finds a task by all id, | |
1842 | * type and namespace specified | |
1843 | * find_task_by_pid_ns(): | |
1844 | * finds a task by its pid in the specified namespace | |
228ebcbe PE |
1845 | * find_task_by_vpid(): |
1846 | * finds a task by its virtual pid | |
198fe21b | 1847 | * |
e49859e7 | 1848 | * see also find_vpid() etc in include/linux/pid.h |
198fe21b PE |
1849 | */ |
1850 | ||
1851 | extern struct task_struct *find_task_by_pid_type_ns(int type, int pid, | |
1852 | struct pid_namespace *ns); | |
1853 | ||
228ebcbe PE |
1854 | extern struct task_struct *find_task_by_vpid(pid_t nr); |
1855 | extern struct task_struct *find_task_by_pid_ns(pid_t nr, | |
1856 | struct pid_namespace *ns); | |
198fe21b | 1857 | |
8520d7c7 | 1858 | extern void __set_special_pids(struct pid *pid); |
1da177e4 LT |
1859 | |
1860 | /* per-UID process charging. */ | |
acce292c | 1861 | extern struct user_struct * alloc_uid(struct user_namespace *, uid_t); |
1da177e4 LT |
1862 | static inline struct user_struct *get_uid(struct user_struct *u) |
1863 | { | |
1864 | atomic_inc(&u->__count); | |
1865 | return u; | |
1866 | } | |
1867 | extern void free_uid(struct user_struct *); | |
28f300d2 | 1868 | extern void release_uids(struct user_namespace *ns); |
1da177e4 LT |
1869 | |
1870 | #include <asm/current.h> | |
1871 | ||
3171a030 | 1872 | extern void do_timer(unsigned long ticks); |
1da177e4 | 1873 | |
b3c97528 HH |
1874 | extern int wake_up_state(struct task_struct *tsk, unsigned int state); |
1875 | extern int wake_up_process(struct task_struct *tsk); | |
1876 | extern void wake_up_new_task(struct task_struct *tsk, | |
1877 | unsigned long clone_flags); | |
1da177e4 LT |
1878 | #ifdef CONFIG_SMP |
1879 | extern void kick_process(struct task_struct *tsk); | |
1880 | #else | |
1881 | static inline void kick_process(struct task_struct *tsk) { } | |
1882 | #endif | |
ad46c2c4 IM |
1883 | extern void sched_fork(struct task_struct *p, int clone_flags); |
1884 | extern void sched_dead(struct task_struct *p); | |
1da177e4 | 1885 | |
1da177e4 LT |
1886 | extern void proc_caches_init(void); |
1887 | extern void flush_signals(struct task_struct *); | |
10ab825b | 1888 | extern void ignore_signals(struct task_struct *); |
1da177e4 LT |
1889 | extern void flush_signal_handlers(struct task_struct *, int force_default); |
1890 | extern int dequeue_signal(struct task_struct *tsk, sigset_t *mask, siginfo_t *info); | |
1891 | ||
1892 | static inline int dequeue_signal_lock(struct task_struct *tsk, sigset_t *mask, siginfo_t *info) | |
1893 | { | |
1894 | unsigned long flags; | |
1895 | int ret; | |
1896 | ||
1897 | spin_lock_irqsave(&tsk->sighand->siglock, flags); | |
1898 | ret = dequeue_signal(tsk, mask, info); | |
1899 | spin_unlock_irqrestore(&tsk->sighand->siglock, flags); | |
1900 | ||
1901 | return ret; | |
1902 | } | |
1903 | ||
1904 | extern void block_all_signals(int (*notifier)(void *priv), void *priv, | |
1905 | sigset_t *mask); | |
1906 | extern void unblock_all_signals(void); | |
1907 | extern void release_task(struct task_struct * p); | |
1908 | extern int send_sig_info(int, struct siginfo *, struct task_struct *); | |
1da177e4 LT |
1909 | extern int force_sigsegv(int, struct task_struct *); |
1910 | extern int force_sig_info(int, struct siginfo *, struct task_struct *); | |
c4b92fc1 | 1911 | extern int __kill_pgrp_info(int sig, struct siginfo *info, struct pid *pgrp); |
c4b92fc1 | 1912 | extern int kill_pid_info(int sig, struct siginfo *info, struct pid *pid); |
2425c08b | 1913 | extern int kill_pid_info_as_uid(int, struct siginfo *, struct pid *, uid_t, uid_t, u32); |
c4b92fc1 EB |
1914 | extern int kill_pgrp(struct pid *pid, int sig, int priv); |
1915 | extern int kill_pid(struct pid *pid, int sig, int priv); | |
c3de4b38 | 1916 | extern int kill_proc_info(int, struct siginfo *, pid_t); |
2b2a1ff6 | 1917 | extern int do_notify_parent(struct task_struct *, int); |
1da177e4 LT |
1918 | extern void force_sig(int, struct task_struct *); |
1919 | extern void force_sig_specific(int, struct task_struct *); | |
1920 | extern int send_sig(int, struct task_struct *, int); | |
1921 | extern void zap_other_threads(struct task_struct *p); | |
1da177e4 LT |
1922 | extern struct sigqueue *sigqueue_alloc(void); |
1923 | extern void sigqueue_free(struct sigqueue *); | |
ac5c2153 | 1924 | extern int send_sigqueue(struct sigqueue *, struct task_struct *, int group); |
9ac95f2f | 1925 | extern int do_sigaction(int, struct k_sigaction *, struct k_sigaction *); |
1da177e4 LT |
1926 | extern int do_sigaltstack(const stack_t __user *, stack_t __user *, unsigned long); |
1927 | ||
9ec52099 CLG |
1928 | static inline int kill_cad_pid(int sig, int priv) |
1929 | { | |
1930 | return kill_pid(cad_pid, sig, priv); | |
1931 | } | |
1932 | ||
1da177e4 LT |
1933 | /* These can be the second arg to send_sig_info/send_group_sig_info. */ |
1934 | #define SEND_SIG_NOINFO ((struct siginfo *) 0) | |
1935 | #define SEND_SIG_PRIV ((struct siginfo *) 1) | |
1936 | #define SEND_SIG_FORCED ((struct siginfo *) 2) | |
1937 | ||
621d3121 ON |
1938 | static inline int is_si_special(const struct siginfo *info) |
1939 | { | |
1940 | return info <= SEND_SIG_FORCED; | |
1941 | } | |
1942 | ||
1da177e4 LT |
1943 | /* True if we are on the alternate signal stack. */ |
1944 | ||
1945 | static inline int on_sig_stack(unsigned long sp) | |
1946 | { | |
1947 | return (sp - current->sas_ss_sp < current->sas_ss_size); | |
1948 | } | |
1949 | ||
1950 | static inline int sas_ss_flags(unsigned long sp) | |
1951 | { | |
1952 | return (current->sas_ss_size == 0 ? SS_DISABLE | |
1953 | : on_sig_stack(sp) ? SS_ONSTACK : 0); | |
1954 | } | |
1955 | ||
1da177e4 LT |
1956 | /* |
1957 | * Routines for handling mm_structs | |
1958 | */ | |
1959 | extern struct mm_struct * mm_alloc(void); | |
1960 | ||
1961 | /* mmdrop drops the mm and the page tables */ | |
b3c97528 | 1962 | extern void __mmdrop(struct mm_struct *); |
1da177e4 LT |
1963 | static inline void mmdrop(struct mm_struct * mm) |
1964 | { | |
6fb43d7b | 1965 | if (unlikely(atomic_dec_and_test(&mm->mm_count))) |
1da177e4 LT |
1966 | __mmdrop(mm); |
1967 | } | |
1968 | ||
1969 | /* mmput gets rid of the mappings and all user-space */ | |
1970 | extern void mmput(struct mm_struct *); | |
1971 | /* Grab a reference to a task's mm, if it is not already going away */ | |
1972 | extern struct mm_struct *get_task_mm(struct task_struct *task); | |
1973 | /* Remove the current tasks stale references to the old mm_struct */ | |
1974 | extern void mm_release(struct task_struct *, struct mm_struct *); | |
402b0862 CO |
1975 | /* Allocate a new mm structure and copy contents from tsk->mm */ |
1976 | extern struct mm_struct *dup_mm(struct task_struct *tsk); | |
1da177e4 | 1977 | |
6f2c55b8 AD |
1978 | extern int copy_thread(unsigned long, unsigned long, unsigned long, |
1979 | struct task_struct *, struct pt_regs *); | |
1da177e4 LT |
1980 | extern void flush_thread(void); |
1981 | extern void exit_thread(void); | |
1982 | ||
1da177e4 | 1983 | extern void exit_files(struct task_struct *); |
6b3934ef | 1984 | extern void __cleanup_signal(struct signal_struct *); |
a7e5328a | 1985 | extern void __cleanup_sighand(struct sighand_struct *); |
cbaffba1 | 1986 | |
1da177e4 | 1987 | extern void exit_itimers(struct signal_struct *); |
cbaffba1 | 1988 | extern void flush_itimer_signals(void); |
1da177e4 LT |
1989 | |
1990 | extern NORET_TYPE void do_group_exit(int); | |
1991 | ||
1da177e4 LT |
1992 | extern void daemonize(const char *, ...); |
1993 | extern int allow_signal(int); | |
1994 | extern int disallow_signal(int); | |
1da177e4 LT |
1995 | |
1996 | extern int do_execve(char *, char __user * __user *, char __user * __user *, struct pt_regs *); | |
1997 | extern long do_fork(unsigned long, unsigned long, struct pt_regs *, unsigned long, int __user *, int __user *); | |
36c8b586 | 1998 | struct task_struct *fork_idle(int); |
1da177e4 LT |
1999 | |
2000 | extern void set_task_comm(struct task_struct *tsk, char *from); | |
59714d65 | 2001 | extern char *get_task_comm(char *to, struct task_struct *tsk); |
1da177e4 LT |
2002 | |
2003 | #ifdef CONFIG_SMP | |
85ba2d86 | 2004 | extern unsigned long wait_task_inactive(struct task_struct *, long match_state); |
1da177e4 | 2005 | #else |
85ba2d86 RM |
2006 | static inline unsigned long wait_task_inactive(struct task_struct *p, |
2007 | long match_state) | |
2008 | { | |
2009 | return 1; | |
2010 | } | |
1da177e4 LT |
2011 | #endif |
2012 | ||
5e85d4ab | 2013 | #define next_task(p) list_entry(rcu_dereference((p)->tasks.next), struct task_struct, tasks) |
1da177e4 LT |
2014 | |
2015 | #define for_each_process(p) \ | |
2016 | for (p = &init_task ; (p = next_task(p)) != &init_task ; ) | |
2017 | ||
d84f4f99 DH |
2018 | extern bool is_single_threaded(struct task_struct *); |
2019 | ||
1da177e4 LT |
2020 | /* |
2021 | * Careful: do_each_thread/while_each_thread is a double loop so | |
2022 | * 'break' will not work as expected - use goto instead. | |
2023 | */ | |
2024 | #define do_each_thread(g, t) \ | |
2025 | for (g = t = &init_task ; (g = t = next_task(g)) != &init_task ; ) do | |
2026 | ||
2027 | #define while_each_thread(g, t) \ | |
2028 | while ((t = next_thread(t)) != g) | |
2029 | ||
de12a787 EB |
2030 | /* de_thread depends on thread_group_leader not being a pid based check */ |
2031 | #define thread_group_leader(p) (p == p->group_leader) | |
1da177e4 | 2032 | |
0804ef4b EB |
2033 | /* Do to the insanities of de_thread it is possible for a process |
2034 | * to have the pid of the thread group leader without actually being | |
2035 | * the thread group leader. For iteration through the pids in proc | |
2036 | * all we care about is that we have a task with the appropriate | |
2037 | * pid, we don't actually care if we have the right task. | |
2038 | */ | |
e868171a | 2039 | static inline int has_group_leader_pid(struct task_struct *p) |
0804ef4b EB |
2040 | { |
2041 | return p->pid == p->tgid; | |
2042 | } | |
2043 | ||
bac0abd6 PE |
2044 | static inline |
2045 | int same_thread_group(struct task_struct *p1, struct task_struct *p2) | |
2046 | { | |
2047 | return p1->tgid == p2->tgid; | |
2048 | } | |
2049 | ||
36c8b586 | 2050 | static inline struct task_struct *next_thread(const struct task_struct *p) |
47e65328 ON |
2051 | { |
2052 | return list_entry(rcu_dereference(p->thread_group.next), | |
36c8b586 | 2053 | struct task_struct, thread_group); |
47e65328 ON |
2054 | } |
2055 | ||
e868171a | 2056 | static inline int thread_group_empty(struct task_struct *p) |
1da177e4 | 2057 | { |
47e65328 | 2058 | return list_empty(&p->thread_group); |
1da177e4 LT |
2059 | } |
2060 | ||
2061 | #define delay_group_leader(p) \ | |
2062 | (thread_group_leader(p) && !thread_group_empty(p)) | |
2063 | ||
39c626ae ON |
2064 | static inline int task_detached(struct task_struct *p) |
2065 | { | |
2066 | return p->exit_signal == -1; | |
2067 | } | |
2068 | ||
1da177e4 | 2069 | /* |
260ea101 | 2070 | * Protects ->fs, ->files, ->mm, ->group_info, ->comm, keyring |
22e2c507 | 2071 | * subscriptions and synchronises with wait4(). Also used in procfs. Also |
ddbcc7e8 PM |
2072 | * pins the final release of task.io_context. Also protects ->cpuset and |
2073 | * ->cgroup.subsys[]. | |
1da177e4 LT |
2074 | * |
2075 | * Nests both inside and outside of read_lock(&tasklist_lock). | |
2076 | * It must not be nested with write_lock_irq(&tasklist_lock), | |
2077 | * neither inside nor outside. | |
2078 | */ | |
2079 | static inline void task_lock(struct task_struct *p) | |
2080 | { | |
2081 | spin_lock(&p->alloc_lock); | |
2082 | } | |
2083 | ||
2084 | static inline void task_unlock(struct task_struct *p) | |
2085 | { | |
2086 | spin_unlock(&p->alloc_lock); | |
2087 | } | |
2088 | ||
f63ee72e ON |
2089 | extern struct sighand_struct *lock_task_sighand(struct task_struct *tsk, |
2090 | unsigned long *flags); | |
2091 | ||
2092 | static inline void unlock_task_sighand(struct task_struct *tsk, | |
2093 | unsigned long *flags) | |
2094 | { | |
2095 | spin_unlock_irqrestore(&tsk->sighand->siglock, *flags); | |
2096 | } | |
2097 | ||
f037360f AV |
2098 | #ifndef __HAVE_THREAD_FUNCTIONS |
2099 | ||
f7e4217b RZ |
2100 | #define task_thread_info(task) ((struct thread_info *)(task)->stack) |
2101 | #define task_stack_page(task) ((task)->stack) | |
a1261f54 | 2102 | |
10ebffde AV |
2103 | static inline void setup_thread_stack(struct task_struct *p, struct task_struct *org) |
2104 | { | |
2105 | *task_thread_info(p) = *task_thread_info(org); | |
2106 | task_thread_info(p)->task = p; | |
2107 | } | |
2108 | ||
2109 | static inline unsigned long *end_of_stack(struct task_struct *p) | |
2110 | { | |
f7e4217b | 2111 | return (unsigned long *)(task_thread_info(p) + 1); |
10ebffde AV |
2112 | } |
2113 | ||
f037360f AV |
2114 | #endif |
2115 | ||
8b05c7e6 FT |
2116 | static inline int object_is_on_stack(void *obj) |
2117 | { | |
2118 | void *stack = task_stack_page(current); | |
2119 | ||
2120 | return (obj >= stack) && (obj < (stack + THREAD_SIZE)); | |
2121 | } | |
2122 | ||
8c9843e5 BH |
2123 | extern void thread_info_cache_init(void); |
2124 | ||
7c9f8861 ES |
2125 | #ifdef CONFIG_DEBUG_STACK_USAGE |
2126 | static inline unsigned long stack_not_used(struct task_struct *p) | |
2127 | { | |
2128 | unsigned long *n = end_of_stack(p); | |
2129 | ||
2130 | do { /* Skip over canary */ | |
2131 | n++; | |
2132 | } while (!*n); | |
2133 | ||
2134 | return (unsigned long)n - (unsigned long)end_of_stack(p); | |
2135 | } | |
2136 | #endif | |
2137 | ||
1da177e4 LT |
2138 | /* set thread flags in other task's structures |
2139 | * - see asm/thread_info.h for TIF_xxxx flags available | |
2140 | */ | |
2141 | static inline void set_tsk_thread_flag(struct task_struct *tsk, int flag) | |
2142 | { | |
a1261f54 | 2143 | set_ti_thread_flag(task_thread_info(tsk), flag); |
1da177e4 LT |
2144 | } |
2145 | ||
2146 | static inline void clear_tsk_thread_flag(struct task_struct *tsk, int flag) | |
2147 | { | |
a1261f54 | 2148 | clear_ti_thread_flag(task_thread_info(tsk), flag); |
1da177e4 LT |
2149 | } |
2150 | ||
2151 | static inline int test_and_set_tsk_thread_flag(struct task_struct *tsk, int flag) | |
2152 | { | |
a1261f54 | 2153 | return test_and_set_ti_thread_flag(task_thread_info(tsk), flag); |
1da177e4 LT |
2154 | } |
2155 | ||
2156 | static inline int test_and_clear_tsk_thread_flag(struct task_struct *tsk, int flag) | |
2157 | { | |
a1261f54 | 2158 | return test_and_clear_ti_thread_flag(task_thread_info(tsk), flag); |
1da177e4 LT |
2159 | } |
2160 | ||
2161 | static inline int test_tsk_thread_flag(struct task_struct *tsk, int flag) | |
2162 | { | |
a1261f54 | 2163 | return test_ti_thread_flag(task_thread_info(tsk), flag); |
1da177e4 LT |
2164 | } |
2165 | ||
2166 | static inline void set_tsk_need_resched(struct task_struct *tsk) | |
2167 | { | |
2168 | set_tsk_thread_flag(tsk,TIF_NEED_RESCHED); | |
2169 | } | |
2170 | ||
2171 | static inline void clear_tsk_need_resched(struct task_struct *tsk) | |
2172 | { | |
2173 | clear_tsk_thread_flag(tsk,TIF_NEED_RESCHED); | |
2174 | } | |
2175 | ||
8ae121ac GH |
2176 | static inline int test_tsk_need_resched(struct task_struct *tsk) |
2177 | { | |
2178 | return unlikely(test_tsk_thread_flag(tsk,TIF_NEED_RESCHED)); | |
2179 | } | |
2180 | ||
1da177e4 LT |
2181 | static inline int signal_pending(struct task_struct *p) |
2182 | { | |
2183 | return unlikely(test_tsk_thread_flag(p,TIF_SIGPENDING)); | |
2184 | } | |
f776d12d | 2185 | |
b3c97528 | 2186 | extern int __fatal_signal_pending(struct task_struct *p); |
f776d12d MW |
2187 | |
2188 | static inline int fatal_signal_pending(struct task_struct *p) | |
2189 | { | |
2190 | return signal_pending(p) && __fatal_signal_pending(p); | |
2191 | } | |
2192 | ||
16882c1e ON |
2193 | static inline int signal_pending_state(long state, struct task_struct *p) |
2194 | { | |
2195 | if (!(state & (TASK_INTERRUPTIBLE | TASK_WAKEKILL))) | |
2196 | return 0; | |
2197 | if (!signal_pending(p)) | |
2198 | return 0; | |
2199 | ||
16882c1e ON |
2200 | return (state & TASK_INTERRUPTIBLE) || __fatal_signal_pending(p); |
2201 | } | |
2202 | ||
1da177e4 LT |
2203 | static inline int need_resched(void) |
2204 | { | |
9404ef02 | 2205 | return unlikely(test_thread_flag(TIF_NEED_RESCHED)); |
1da177e4 LT |
2206 | } |
2207 | ||
2208 | /* | |
2209 | * cond_resched() and cond_resched_lock(): latency reduction via | |
2210 | * explicit rescheduling in places that are safe. The return | |
2211 | * value indicates whether a reschedule was done in fact. | |
2212 | * cond_resched_lock() will drop the spinlock before scheduling, | |
2213 | * cond_resched_softirq() will enable bhs before scheduling. | |
2214 | */ | |
c3921ab7 | 2215 | extern int _cond_resched(void); |
c714a534 | 2216 | #ifdef CONFIG_PREEMPT_BKL |
02b67cc3 HX |
2217 | static inline int cond_resched(void) |
2218 | { | |
2219 | return 0; | |
2220 | } | |
2221 | #else | |
02b67cc3 HX |
2222 | static inline int cond_resched(void) |
2223 | { | |
2224 | return _cond_resched(); | |
2225 | } | |
2226 | #endif | |
1da177e4 LT |
2227 | extern int cond_resched_lock(spinlock_t * lock); |
2228 | extern int cond_resched_softirq(void); | |
c3921ab7 LT |
2229 | static inline int cond_resched_bkl(void) |
2230 | { | |
2231 | return _cond_resched(); | |
2232 | } | |
1da177e4 LT |
2233 | |
2234 | /* | |
2235 | * Does a critical section need to be broken due to another | |
95c354fe NP |
2236 | * task waiting?: (technically does not depend on CONFIG_PREEMPT, |
2237 | * but a general need for low latency) | |
1da177e4 | 2238 | */ |
95c354fe | 2239 | static inline int spin_needbreak(spinlock_t *lock) |
1da177e4 | 2240 | { |
95c354fe NP |
2241 | #ifdef CONFIG_PREEMPT |
2242 | return spin_is_contended(lock); | |
2243 | #else | |
1da177e4 | 2244 | return 0; |
95c354fe | 2245 | #endif |
1da177e4 LT |
2246 | } |
2247 | ||
f06febc9 FM |
2248 | /* |
2249 | * Thread group CPU time accounting. | |
2250 | */ | |
4cd4c1b4 | 2251 | void thread_group_cputime(struct task_struct *tsk, struct task_cputime *times); |
4da94d49 | 2252 | void thread_group_cputimer(struct task_struct *tsk, struct task_cputime *times); |
f06febc9 | 2253 | |
490dea45 | 2254 | static inline void thread_group_cputime_init(struct signal_struct *sig) |
f06febc9 | 2255 | { |
4cd4c1b4 PZ |
2256 | sig->cputimer.cputime = INIT_CPUTIME; |
2257 | spin_lock_init(&sig->cputimer.lock); | |
2258 | sig->cputimer.running = 0; | |
f06febc9 FM |
2259 | } |
2260 | ||
f06febc9 FM |
2261 | static inline void thread_group_cputime_free(struct signal_struct *sig) |
2262 | { | |
f06febc9 FM |
2263 | } |
2264 | ||
7bb44ade RM |
2265 | /* |
2266 | * Reevaluate whether the task has signals pending delivery. | |
2267 | * Wake the task if so. | |
2268 | * This is required every time the blocked sigset_t changes. | |
2269 | * callers must hold sighand->siglock. | |
2270 | */ | |
2271 | extern void recalc_sigpending_and_wake(struct task_struct *t); | |
1da177e4 LT |
2272 | extern void recalc_sigpending(void); |
2273 | ||
2274 | extern void signal_wake_up(struct task_struct *t, int resume_stopped); | |
2275 | ||
2276 | /* | |
2277 | * Wrappers for p->thread_info->cpu access. No-op on UP. | |
2278 | */ | |
2279 | #ifdef CONFIG_SMP | |
2280 | ||
2281 | static inline unsigned int task_cpu(const struct task_struct *p) | |
2282 | { | |
a1261f54 | 2283 | return task_thread_info(p)->cpu; |
1da177e4 LT |
2284 | } |
2285 | ||
c65cc870 | 2286 | extern void set_task_cpu(struct task_struct *p, unsigned int cpu); |
1da177e4 LT |
2287 | |
2288 | #else | |
2289 | ||
2290 | static inline unsigned int task_cpu(const struct task_struct *p) | |
2291 | { | |
2292 | return 0; | |
2293 | } | |
2294 | ||
2295 | static inline void set_task_cpu(struct task_struct *p, unsigned int cpu) | |
2296 | { | |
2297 | } | |
2298 | ||
2299 | #endif /* CONFIG_SMP */ | |
2300 | ||
1da177e4 | 2301 | extern void arch_pick_mmap_layout(struct mm_struct *mm); |
1da177e4 | 2302 | |
1a3c3034 IM |
2303 | #ifdef CONFIG_TRACING |
2304 | extern void | |
2305 | __trace_special(void *__tr, void *__data, | |
2306 | unsigned long arg1, unsigned long arg2, unsigned long arg3); | |
1da177e4 | 2307 | #else |
1a3c3034 IM |
2308 | static inline void |
2309 | __trace_special(void *__tr, void *__data, | |
2310 | unsigned long arg1, unsigned long arg2, unsigned long arg3) | |
1da177e4 | 2311 | { |
1da177e4 LT |
2312 | } |
2313 | #endif | |
2314 | ||
96f874e2 RR |
2315 | extern long sched_setaffinity(pid_t pid, const struct cpumask *new_mask); |
2316 | extern long sched_getaffinity(pid_t pid, struct cpumask *mask); | |
5c45bf27 | 2317 | |
1da177e4 LT |
2318 | extern void normalize_rt_tasks(void); |
2319 | ||
052f1dc7 | 2320 | #ifdef CONFIG_GROUP_SCHED |
9b5b7751 | 2321 | |
4cf86d77 | 2322 | extern struct task_group init_task_group; |
eff766a6 PZ |
2323 | #ifdef CONFIG_USER_SCHED |
2324 | extern struct task_group root_task_group; | |
6c415b92 | 2325 | extern void set_tg_uid(struct user_struct *user); |
eff766a6 | 2326 | #endif |
9b5b7751 | 2327 | |
ec7dc8ac | 2328 | extern struct task_group *sched_create_group(struct task_group *parent); |
4cf86d77 | 2329 | extern void sched_destroy_group(struct task_group *tg); |
9b5b7751 | 2330 | extern void sched_move_task(struct task_struct *tsk); |
052f1dc7 | 2331 | #ifdef CONFIG_FAIR_GROUP_SCHED |
4cf86d77 | 2332 | extern int sched_group_set_shares(struct task_group *tg, unsigned long shares); |
5cb350ba | 2333 | extern unsigned long sched_group_shares(struct task_group *tg); |
052f1dc7 PZ |
2334 | #endif |
2335 | #ifdef CONFIG_RT_GROUP_SCHED | |
9f0c1e56 PZ |
2336 | extern int sched_group_set_rt_runtime(struct task_group *tg, |
2337 | long rt_runtime_us); | |
2338 | extern long sched_group_rt_runtime(struct task_group *tg); | |
d0b27fa7 PZ |
2339 | extern int sched_group_set_rt_period(struct task_group *tg, |
2340 | long rt_period_us); | |
2341 | extern long sched_group_rt_period(struct task_group *tg); | |
54e99124 | 2342 | extern int sched_rt_can_attach(struct task_group *tg, struct task_struct *tsk); |
052f1dc7 | 2343 | #endif |
9b5b7751 SV |
2344 | #endif |
2345 | ||
54e99124 DG |
2346 | extern int task_can_switch_user(struct user_struct *up, |
2347 | struct task_struct *tsk); | |
2348 | ||
4b98d11b AD |
2349 | #ifdef CONFIG_TASK_XACCT |
2350 | static inline void add_rchar(struct task_struct *tsk, ssize_t amt) | |
2351 | { | |
940389b8 | 2352 | tsk->ioac.rchar += amt; |
4b98d11b AD |
2353 | } |
2354 | ||
2355 | static inline void add_wchar(struct task_struct *tsk, ssize_t amt) | |
2356 | { | |
940389b8 | 2357 | tsk->ioac.wchar += amt; |
4b98d11b AD |
2358 | } |
2359 | ||
2360 | static inline void inc_syscr(struct task_struct *tsk) | |
2361 | { | |
940389b8 | 2362 | tsk->ioac.syscr++; |
4b98d11b AD |
2363 | } |
2364 | ||
2365 | static inline void inc_syscw(struct task_struct *tsk) | |
2366 | { | |
940389b8 | 2367 | tsk->ioac.syscw++; |
4b98d11b AD |
2368 | } |
2369 | #else | |
2370 | static inline void add_rchar(struct task_struct *tsk, ssize_t amt) | |
2371 | { | |
2372 | } | |
2373 | ||
2374 | static inline void add_wchar(struct task_struct *tsk, ssize_t amt) | |
2375 | { | |
2376 | } | |
2377 | ||
2378 | static inline void inc_syscr(struct task_struct *tsk) | |
2379 | { | |
2380 | } | |
2381 | ||
2382 | static inline void inc_syscw(struct task_struct *tsk) | |
2383 | { | |
2384 | } | |
2385 | #endif | |
2386 | ||
82455257 DH |
2387 | #ifndef TASK_SIZE_OF |
2388 | #define TASK_SIZE_OF(tsk) TASK_SIZE | |
2389 | #endif | |
2390 | ||
cf475ad2 BS |
2391 | #ifdef CONFIG_MM_OWNER |
2392 | extern void mm_update_next_owner(struct mm_struct *mm); | |
2393 | extern void mm_init_owner(struct mm_struct *mm, struct task_struct *p); | |
2394 | #else | |
2395 | static inline void mm_update_next_owner(struct mm_struct *mm) | |
2396 | { | |
2397 | } | |
2398 | ||
2399 | static inline void mm_init_owner(struct mm_struct *mm, struct task_struct *p) | |
2400 | { | |
2401 | } | |
2402 | #endif /* CONFIG_MM_OWNER */ | |
2403 | ||
7c731e0a SR |
2404 | #define TASK_STATE_TO_CHAR_STR "RSDTtZX" |
2405 | ||
1da177e4 LT |
2406 | #endif /* __KERNEL__ */ |
2407 | ||
2408 | #endif |