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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
1da177e4 LT |
2 | #ifndef _LINUX_SCHED_H |
3 | #define _LINUX_SCHED_H | |
4 | ||
5eca1c10 IM |
5 | /* |
6 | * Define 'struct task_struct' and provide the main scheduler | |
7 | * APIs (schedule(), wakeup variants, etc.) | |
8 | */ | |
b7b3c76a | 9 | |
5eca1c10 | 10 | #include <uapi/linux/sched.h> |
be075489 | 11 | #include <linux/mm_event.h> |
5c228079 | 12 | |
5eca1c10 | 13 | #include <asm/current.h> |
1da177e4 | 14 | |
5eca1c10 | 15 | #include <linux/pid.h> |
1da177e4 | 16 | #include <linux/sem.h> |
ab602f79 | 17 | #include <linux/shm.h> |
5eca1c10 IM |
18 | #include <linux/kcov.h> |
19 | #include <linux/mutex.h> | |
20 | #include <linux/plist.h> | |
21 | #include <linux/hrtimer.h> | |
1da177e4 | 22 | #include <linux/seccomp.h> |
5eca1c10 | 23 | #include <linux/nodemask.h> |
b68070e1 | 24 | #include <linux/rcupdate.h> |
a3b6714e | 25 | #include <linux/resource.h> |
9745512c | 26 | #include <linux/latencytop.h> |
5eca1c10 IM |
27 | #include <linux/sched/prio.h> |
28 | #include <linux/signal_types.h> | |
29 | #include <linux/mm_types_task.h> | |
30 | #include <linux/task_io_accounting.h> | |
a3b6714e | 31 | |
5eca1c10 | 32 | /* task_struct member predeclarations (sorted alphabetically): */ |
c7af7877 | 33 | struct audit_context; |
c7af7877 | 34 | struct backing_dev_info; |
bddd87c7 | 35 | struct bio_list; |
73c10101 | 36 | struct blk_plug; |
c7af7877 | 37 | struct cfs_rq; |
c7af7877 IM |
38 | struct fs_struct; |
39 | struct futex_pi_state; | |
40 | struct io_context; | |
41 | struct mempolicy; | |
89076bc3 | 42 | struct nameidata; |
c7af7877 IM |
43 | struct nsproxy; |
44 | struct perf_event_context; | |
45 | struct pid_namespace; | |
46 | struct pipe_inode_info; | |
47 | struct rcu_node; | |
48 | struct reclaim_state; | |
49 | struct robust_list_head; | |
50 | struct sched_attr; | |
51 | struct sched_param; | |
43ae34cb | 52 | struct seq_file; |
c7af7877 IM |
53 | struct sighand_struct; |
54 | struct signal_struct; | |
55 | struct task_delay_info; | |
4cf86d77 | 56 | struct task_group; |
1da177e4 | 57 | |
4a8342d2 LT |
58 | /* |
59 | * Task state bitmask. NOTE! These bits are also | |
60 | * encoded in fs/proc/array.c: get_task_state(). | |
61 | * | |
62 | * We have two separate sets of flags: task->state | |
63 | * is about runnability, while task->exit_state are | |
64 | * about the task exiting. Confusing, but this way | |
65 | * modifying one set can't modify the other one by | |
66 | * mistake. | |
67 | */ | |
5eca1c10 IM |
68 | |
69 | /* Used in tsk->state: */ | |
92c4bc9f PZ |
70 | #define TASK_RUNNING 0x0000 |
71 | #define TASK_INTERRUPTIBLE 0x0001 | |
72 | #define TASK_UNINTERRUPTIBLE 0x0002 | |
73 | #define __TASK_STOPPED 0x0004 | |
74 | #define __TASK_TRACED 0x0008 | |
5eca1c10 | 75 | /* Used in tsk->exit_state: */ |
92c4bc9f PZ |
76 | #define EXIT_DEAD 0x0010 |
77 | #define EXIT_ZOMBIE 0x0020 | |
5eca1c10 IM |
78 | #define EXIT_TRACE (EXIT_ZOMBIE | EXIT_DEAD) |
79 | /* Used in tsk->state again: */ | |
8ef9925b PZ |
80 | #define TASK_PARKED 0x0040 |
81 | #define TASK_DEAD 0x0080 | |
82 | #define TASK_WAKEKILL 0x0100 | |
83 | #define TASK_WAKING 0x0200 | |
92c4bc9f PZ |
84 | #define TASK_NOLOAD 0x0400 |
85 | #define TASK_NEW 0x0800 | |
86 | #define TASK_STATE_MAX 0x1000 | |
5eca1c10 | 87 | |
5eca1c10 IM |
88 | /* Convenience macros for the sake of set_current_state: */ |
89 | #define TASK_KILLABLE (TASK_WAKEKILL | TASK_UNINTERRUPTIBLE) | |
90 | #define TASK_STOPPED (TASK_WAKEKILL | __TASK_STOPPED) | |
91 | #define TASK_TRACED (TASK_WAKEKILL | __TASK_TRACED) | |
92 | ||
93 | #define TASK_IDLE (TASK_UNINTERRUPTIBLE | TASK_NOLOAD) | |
94 | ||
95 | /* Convenience macros for the sake of wake_up(): */ | |
96 | #define TASK_NORMAL (TASK_INTERRUPTIBLE | TASK_UNINTERRUPTIBLE) | |
97 | #define TASK_ALL (TASK_NORMAL | __TASK_STOPPED | __TASK_TRACED) | |
98 | ||
99 | /* get_task_state(): */ | |
100 | #define TASK_REPORT (TASK_RUNNING | TASK_INTERRUPTIBLE | \ | |
101 | TASK_UNINTERRUPTIBLE | __TASK_STOPPED | \ | |
8ef9925b PZ |
102 | __TASK_TRACED | EXIT_DEAD | EXIT_ZOMBIE | \ |
103 | TASK_PARKED) | |
5eca1c10 IM |
104 | |
105 | #define task_is_traced(task) ((task->state & __TASK_TRACED) != 0) | |
106 | ||
107 | #define task_is_stopped(task) ((task->state & __TASK_STOPPED) != 0) | |
108 | ||
109 | #define task_is_stopped_or_traced(task) ((task->state & (__TASK_STOPPED | __TASK_TRACED)) != 0) | |
110 | ||
111 | #define task_contributes_to_load(task) ((task->state & TASK_UNINTERRUPTIBLE) != 0 && \ | |
112 | (task->flags & PF_FROZEN) == 0 && \ | |
113 | (task->state & TASK_NOLOAD) == 0) | |
1da177e4 | 114 | |
8eb23b9f PZ |
115 | #ifdef CONFIG_DEBUG_ATOMIC_SLEEP |
116 | ||
07423963 PZ |
117 | /* |
118 | * Special states are those that do not use the normal wait-loop pattern. See | |
119 | * the comment with set_special_state(). | |
120 | */ | |
121 | #define is_special_task_state(state) \ | |
122 | ((state) & (__TASK_STOPPED | __TASK_TRACED | TASK_DEAD)) | |
123 | ||
8eb23b9f PZ |
124 | #define __set_current_state(state_value) \ |
125 | do { \ | |
07423963 | 126 | WARN_ON_ONCE(is_special_task_state(state_value));\ |
8eb23b9f PZ |
127 | current->task_state_change = _THIS_IP_; \ |
128 | current->state = (state_value); \ | |
129 | } while (0) | |
07423963 | 130 | |
8eb23b9f PZ |
131 | #define set_current_state(state_value) \ |
132 | do { \ | |
07423963 | 133 | WARN_ON_ONCE(is_special_task_state(state_value));\ |
8eb23b9f | 134 | current->task_state_change = _THIS_IP_; \ |
a2250238 | 135 | smp_store_mb(current->state, (state_value)); \ |
8eb23b9f PZ |
136 | } while (0) |
137 | ||
07423963 PZ |
138 | #define set_special_state(state_value) \ |
139 | do { \ | |
140 | unsigned long flags; /* may shadow */ \ | |
141 | WARN_ON_ONCE(!is_special_task_state(state_value)); \ | |
142 | raw_spin_lock_irqsave(¤t->pi_lock, flags); \ | |
143 | current->task_state_change = _THIS_IP_; \ | |
144 | current->state = (state_value); \ | |
145 | raw_spin_unlock_irqrestore(¤t->pi_lock, flags); \ | |
146 | } while (0) | |
8eb23b9f | 147 | #else |
498d0c57 AM |
148 | /* |
149 | * set_current_state() includes a barrier so that the write of current->state | |
150 | * is correctly serialised wrt the caller's subsequent test of whether to | |
151 | * actually sleep: | |
152 | * | |
a2250238 | 153 | * for (;;) { |
498d0c57 | 154 | * set_current_state(TASK_UNINTERRUPTIBLE); |
a2250238 PZ |
155 | * if (!need_sleep) |
156 | * break; | |
157 | * | |
158 | * schedule(); | |
159 | * } | |
160 | * __set_current_state(TASK_RUNNING); | |
161 | * | |
162 | * If the caller does not need such serialisation (because, for instance, the | |
163 | * condition test and condition change and wakeup are under the same lock) then | |
164 | * use __set_current_state(). | |
165 | * | |
166 | * The above is typically ordered against the wakeup, which does: | |
167 | * | |
07423963 PZ |
168 | * need_sleep = false; |
169 | * wake_up_state(p, TASK_UNINTERRUPTIBLE); | |
a2250238 PZ |
170 | * |
171 | * Where wake_up_state() (and all other wakeup primitives) imply enough | |
172 | * barriers to order the store of the variable against wakeup. | |
173 | * | |
174 | * Wakeup will do: if (@state & p->state) p->state = TASK_RUNNING, that is, | |
175 | * once it observes the TASK_UNINTERRUPTIBLE store the waking CPU can issue a | |
176 | * TASK_RUNNING store which can collide with __set_current_state(TASK_RUNNING). | |
498d0c57 | 177 | * |
07423963 PZ |
178 | * However, with slightly different timing the wakeup TASK_RUNNING store can |
179 | * also collide with the TASK_UNINTERRUPTIBLE store. Loosing that store is not | |
180 | * a problem either because that will result in one extra go around the loop | |
181 | * and our @cond test will save the day. | |
498d0c57 | 182 | * |
a2250238 | 183 | * Also see the comments of try_to_wake_up(). |
498d0c57 | 184 | */ |
07423963 PZ |
185 | #define __set_current_state(state_value) \ |
186 | current->state = (state_value) | |
187 | ||
188 | #define set_current_state(state_value) \ | |
189 | smp_store_mb(current->state, (state_value)) | |
190 | ||
191 | /* | |
192 | * set_special_state() should be used for those states when the blocking task | |
193 | * can not use the regular condition based wait-loop. In that case we must | |
194 | * serialize against wakeups such that any possible in-flight TASK_RUNNING stores | |
195 | * will not collide with our state change. | |
196 | */ | |
197 | #define set_special_state(state_value) \ | |
198 | do { \ | |
199 | unsigned long flags; /* may shadow */ \ | |
200 | raw_spin_lock_irqsave(¤t->pi_lock, flags); \ | |
201 | current->state = (state_value); \ | |
202 | raw_spin_unlock_irqrestore(¤t->pi_lock, flags); \ | |
203 | } while (0) | |
204 | ||
8eb23b9f PZ |
205 | #endif |
206 | ||
5eca1c10 IM |
207 | /* Task command name length: */ |
208 | #define TASK_COMM_LEN 16 | |
1da177e4 | 209 | |
0bb35550 SV |
210 | enum task_event { |
211 | PUT_PREV_TASK = 0, | |
212 | PICK_NEXT_TASK = 1, | |
213 | TASK_WAKE = 2, | |
214 | TASK_MIGRATE = 3, | |
215 | TASK_UPDATE = 4, | |
216 | IRQ_UPDATE = 5, | |
217 | }; | |
218 | ||
5eca1c10 | 219 | extern cpumask_var_t cpu_isolated_map; |
3fa0818b | 220 | |
1da177e4 LT |
221 | extern void scheduler_tick(void); |
222 | ||
5eca1c10 IM |
223 | #define MAX_SCHEDULE_TIMEOUT LONG_MAX |
224 | ||
225 | extern long schedule_timeout(long timeout); | |
226 | extern long schedule_timeout_interruptible(long timeout); | |
227 | extern long schedule_timeout_killable(long timeout); | |
228 | extern long schedule_timeout_uninterruptible(long timeout); | |
229 | extern long schedule_timeout_idle(long timeout); | |
1da177e4 | 230 | asmlinkage void schedule(void); |
c5491ea7 | 231 | extern void schedule_preempt_disabled(void); |
1da177e4 | 232 | |
10ab5643 TH |
233 | extern int __must_check io_schedule_prepare(void); |
234 | extern void io_schedule_finish(int token); | |
9cff8ade | 235 | extern long io_schedule_timeout(long timeout); |
10ab5643 | 236 | extern void io_schedule(void); |
9cff8ade | 237 | |
d37f761d | 238 | /** |
0ba42a59 | 239 | * struct prev_cputime - snapshot of system and user cputime |
d37f761d FW |
240 | * @utime: time spent in user mode |
241 | * @stime: time spent in system mode | |
9d7fb042 | 242 | * @lock: protects the above two fields |
d37f761d | 243 | * |
9d7fb042 PZ |
244 | * Stores previous user/system time values such that we can guarantee |
245 | * monotonicity. | |
d37f761d | 246 | */ |
9d7fb042 PZ |
247 | struct prev_cputime { |
248 | #ifndef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE | |
5eca1c10 IM |
249 | u64 utime; |
250 | u64 stime; | |
251 | raw_spinlock_t lock; | |
9d7fb042 | 252 | #endif |
d37f761d FW |
253 | }; |
254 | ||
f06febc9 FM |
255 | /** |
256 | * struct task_cputime - collected CPU time counts | |
5613fda9 FW |
257 | * @utime: time spent in user mode, in nanoseconds |
258 | * @stime: time spent in kernel mode, in nanoseconds | |
f06febc9 | 259 | * @sum_exec_runtime: total time spent on the CPU, in nanoseconds |
5ce73a4a | 260 | * |
9d7fb042 PZ |
261 | * This structure groups together three kinds of CPU time that are tracked for |
262 | * threads and thread groups. Most things considering CPU time want to group | |
263 | * these counts together and treat all three of them in parallel. | |
f06febc9 FM |
264 | */ |
265 | struct task_cputime { | |
5eca1c10 IM |
266 | u64 utime; |
267 | u64 stime; | |
268 | unsigned long long sum_exec_runtime; | |
f06febc9 | 269 | }; |
9d7fb042 | 270 | |
5eca1c10 IM |
271 | /* Alternate field names when used on cache expirations: */ |
272 | #define virt_exp utime | |
273 | #define prof_exp stime | |
274 | #define sched_exp sum_exec_runtime | |
f06febc9 | 275 | |
bac5b6b6 FW |
276 | enum vtime_state { |
277 | /* Task is sleeping or running in a CPU with VTIME inactive: */ | |
278 | VTIME_INACTIVE = 0, | |
279 | /* Task runs in userspace in a CPU with VTIME active: */ | |
280 | VTIME_USER, | |
281 | /* Task runs in kernelspace in a CPU with VTIME active: */ | |
282 | VTIME_SYS, | |
283 | }; | |
284 | ||
285 | struct vtime { | |
286 | seqcount_t seqcount; | |
287 | unsigned long long starttime; | |
288 | enum vtime_state state; | |
2a42eb95 WL |
289 | u64 utime; |
290 | u64 stime; | |
291 | u64 gtime; | |
bac5b6b6 FW |
292 | }; |
293 | ||
1da177e4 | 294 | struct sched_info { |
7f5f8e8d | 295 | #ifdef CONFIG_SCHED_INFO |
5eca1c10 IM |
296 | /* Cumulative counters: */ |
297 | ||
298 | /* # of times we have run on this CPU: */ | |
299 | unsigned long pcount; | |
300 | ||
301 | /* Time spent waiting on a runqueue: */ | |
302 | unsigned long long run_delay; | |
303 | ||
304 | /* Timestamps: */ | |
305 | ||
306 | /* When did we last run on a CPU? */ | |
307 | unsigned long long last_arrival; | |
308 | ||
309 | /* When were we last queued to run? */ | |
310 | unsigned long long last_queued; | |
1da177e4 | 311 | |
f6db8347 | 312 | #endif /* CONFIG_SCHED_INFO */ |
7f5f8e8d | 313 | }; |
1da177e4 | 314 | |
6ecdd749 YD |
315 | /* |
316 | * Integer metrics need fixed point arithmetic, e.g., sched/fair | |
317 | * has a few: load, load_avg, util_avg, freq, and capacity. | |
318 | * | |
319 | * We define a basic fixed point arithmetic range, and then formalize | |
320 | * all these metrics based on that basic range. | |
321 | */ | |
5eca1c10 IM |
322 | # define SCHED_FIXEDPOINT_SHIFT 10 |
323 | # define SCHED_FIXEDPOINT_SCALE (1L << SCHED_FIXEDPOINT_SHIFT) | |
6ecdd749 | 324 | |
20b8a59f | 325 | struct load_weight { |
5eca1c10 IM |
326 | unsigned long weight; |
327 | u32 inv_weight; | |
20b8a59f IM |
328 | }; |
329 | ||
55ffd5bd | 330 | /** |
331 | * struct util_est - Estimation utilization of FAIR tasks | |
332 | * @enqueued: instantaneous estimated utilization of a task/cpu | |
333 | * @ewma: the Exponential Weighted Moving Average (EWMA) | |
334 | * utilization of a task | |
335 | * | |
336 | * Support data structure to track an Exponential Weighted Moving Average | |
337 | * (EWMA) of a FAIR task's utilization. New samples are added to the moving | |
338 | * average each time a task completes an activation. Sample's weight is chosen | |
339 | * so that the EWMA will be relatively insensitive to transient changes to the | |
340 | * task's workload. | |
341 | * | |
342 | * The enqueued attribute has a slightly different meaning for tasks and cpus: | |
343 | * - task: the task's util_avg at last task dequeue time | |
344 | * - cfs_rq: the sum of util_est.enqueued for each RUNNABLE task on that CPU | |
345 | * Thus, the util_est.enqueued of a task represents the contribution on the | |
346 | * estimated utilization of the CPU where that task is currently enqueued. | |
347 | * | |
348 | * Only for tasks we track a moving average of the past instantaneous | |
349 | * estimated utilization. This allows to absorb sporadic drops in utilization | |
350 | * of an otherwise almost periodic task. | |
351 | */ | |
352 | struct util_est { | |
353 | unsigned int enqueued; | |
354 | unsigned int ewma; | |
355 | #define UTIL_EST_WEIGHT_SHIFT 2 | |
356 | }; | |
357 | ||
9d89c257 | 358 | /* |
7b595334 YD |
359 | * The load_avg/util_avg accumulates an infinite geometric series |
360 | * (see __update_load_avg() in kernel/sched/fair.c). | |
361 | * | |
362 | * [load_avg definition] | |
363 | * | |
364 | * load_avg = runnable% * scale_load_down(load) | |
365 | * | |
366 | * where runnable% is the time ratio that a sched_entity is runnable. | |
367 | * For cfs_rq, it is the aggregated load_avg of all runnable and | |
9d89c257 | 368 | * blocked sched_entities. |
7b595334 YD |
369 | * |
370 | * load_avg may also take frequency scaling into account: | |
371 | * | |
372 | * load_avg = runnable% * scale_load_down(load) * freq% | |
373 | * | |
374 | * where freq% is the CPU frequency normalized to the highest frequency. | |
375 | * | |
376 | * [util_avg definition] | |
377 | * | |
378 | * util_avg = running% * SCHED_CAPACITY_SCALE | |
379 | * | |
380 | * where running% is the time ratio that a sched_entity is running on | |
381 | * a CPU. For cfs_rq, it is the aggregated util_avg of all runnable | |
382 | * and blocked sched_entities. | |
383 | * | |
384 | * util_avg may also factor frequency scaling and CPU capacity scaling: | |
385 | * | |
386 | * util_avg = running% * SCHED_CAPACITY_SCALE * freq% * capacity% | |
387 | * | |
388 | * where freq% is the same as above, and capacity% is the CPU capacity | |
389 | * normalized to the greatest capacity (due to uarch differences, etc). | |
390 | * | |
391 | * N.B., the above ratios (runnable%, running%, freq%, and capacity%) | |
392 | * themselves are in the range of [0, 1]. To do fixed point arithmetics, | |
393 | * we therefore scale them to as large a range as necessary. This is for | |
394 | * example reflected by util_avg's SCHED_CAPACITY_SCALE. | |
395 | * | |
396 | * [Overflow issue] | |
397 | * | |
398 | * The 64-bit load_sum can have 4353082796 (=2^64/47742/88761) entities | |
399 | * with the highest load (=88761), always runnable on a single cfs_rq, | |
400 | * and should not overflow as the number already hits PID_MAX_LIMIT. | |
401 | * | |
402 | * For all other cases (including 32-bit kernels), struct load_weight's | |
403 | * weight will overflow first before we do, because: | |
404 | * | |
405 | * Max(load_avg) <= Max(load.weight) | |
406 | * | |
407 | * Then it is the load_weight's responsibility to consider overflow | |
408 | * issues. | |
9d89c257 | 409 | */ |
9d85f21c | 410 | struct sched_avg { |
5eca1c10 IM |
411 | u64 last_update_time; |
412 | u64 load_sum; | |
413 | u32 util_sum; | |
414 | u32 period_contrib; | |
415 | unsigned long load_avg; | |
416 | unsigned long util_avg; | |
55ffd5bd | 417 | struct util_est util_est; |
9d85f21c PT |
418 | }; |
419 | ||
a456bd1f PB |
420 | struct ontime_avg { |
421 | u64 ontime_migration_time; | |
422 | u64 load_sum; | |
423 | u32 period_contrib; | |
424 | unsigned long load_avg; | |
425 | }; | |
426 | ||
427 | struct ontime_entity { | |
428 | struct ontime_avg avg; | |
6258fc4b | 429 | int migrating; |
a456bd1f PB |
430 | int cpu; |
431 | }; | |
a456bd1f | 432 | |
41acab88 | 433 | struct sched_statistics { |
7f5f8e8d | 434 | #ifdef CONFIG_SCHEDSTATS |
5eca1c10 IM |
435 | u64 wait_start; |
436 | u64 wait_max; | |
437 | u64 wait_count; | |
438 | u64 wait_sum; | |
439 | u64 iowait_count; | |
440 | u64 iowait_sum; | |
441 | ||
442 | u64 sleep_start; | |
443 | u64 sleep_max; | |
444 | s64 sum_sleep_runtime; | |
445 | ||
446 | u64 block_start; | |
447 | u64 block_max; | |
448 | u64 exec_max; | |
449 | u64 slice_max; | |
450 | ||
451 | u64 nr_migrations_cold; | |
452 | u64 nr_failed_migrations_affine; | |
453 | u64 nr_failed_migrations_running; | |
454 | u64 nr_failed_migrations_hot; | |
455 | u64 nr_forced_migrations; | |
456 | ||
457 | u64 nr_wakeups; | |
458 | u64 nr_wakeups_sync; | |
459 | u64 nr_wakeups_migrate; | |
460 | u64 nr_wakeups_local; | |
461 | u64 nr_wakeups_remote; | |
462 | u64 nr_wakeups_affine; | |
463 | u64 nr_wakeups_affine_attempts; | |
464 | u64 nr_wakeups_passive; | |
465 | u64 nr_wakeups_idle; | |
41acab88 | 466 | #endif |
7f5f8e8d | 467 | }; |
41acab88 LDM |
468 | |
469 | struct sched_entity { | |
5eca1c10 IM |
470 | /* For load-balancing: */ |
471 | struct load_weight load; | |
472 | struct rb_node run_node; | |
473 | struct list_head group_node; | |
474 | unsigned int on_rq; | |
41acab88 | 475 | |
5eca1c10 IM |
476 | u64 exec_start; |
477 | u64 sum_exec_runtime; | |
478 | u64 vruntime; | |
479 | u64 prev_sum_exec_runtime; | |
41acab88 | 480 | |
5eca1c10 | 481 | u64 nr_migrations; |
41acab88 | 482 | |
5eca1c10 | 483 | struct sched_statistics statistics; |
94c18227 | 484 | |
20b8a59f | 485 | #ifdef CONFIG_FAIR_GROUP_SCHED |
5eca1c10 IM |
486 | int depth; |
487 | struct sched_entity *parent; | |
20b8a59f | 488 | /* rq on which this entity is (to be) queued: */ |
5eca1c10 | 489 | struct cfs_rq *cfs_rq; |
20b8a59f | 490 | /* rq "owned" by this entity/group: */ |
5eca1c10 | 491 | struct cfs_rq *my_q; |
20b8a59f | 492 | #endif |
8bd75c77 | 493 | |
141965c7 | 494 | #ifdef CONFIG_SMP |
5a107804 JO |
495 | /* |
496 | * Per entity load average tracking. | |
497 | * | |
498 | * Put into separate cache line so it does not | |
499 | * collide with read-mostly values above. | |
500 | */ | |
5eca1c10 | 501 | struct sched_avg avg ____cacheline_aligned_in_smp; |
9d85f21c | 502 | #endif |
a456bd1f | 503 | struct ontime_entity ontime; |
20b8a59f | 504 | }; |
70b97a7f | 505 | |
0bb35550 SV |
506 | #ifdef CONFIG_SCHED_WALT |
507 | #define RAVG_HIST_SIZE_MAX 5 | |
508 | ||
509 | /* ravg represents frequency scaled cpu-demand of tasks */ | |
510 | struct ravg { | |
511 | /* | |
512 | * 'mark_start' marks the beginning of an event (task waking up, task | |
513 | * starting to execute, task being preempted) within a window | |
514 | * | |
515 | * 'sum' represents how runnable a task has been within current | |
516 | * window. It incorporates both running time and wait time and is | |
517 | * frequency scaled. | |
518 | * | |
519 | * 'sum_history' keeps track of history of 'sum' seen over previous | |
520 | * RAVG_HIST_SIZE windows. Windows where task was entirely sleeping are | |
521 | * ignored. | |
522 | * | |
523 | * 'demand' represents maximum sum seen over previous | |
524 | * sysctl_sched_ravg_hist_size windows. 'demand' could drive frequency | |
525 | * demand for tasks. | |
526 | * | |
527 | * 'curr_window' represents task's contribution to cpu busy time | |
528 | * statistics (rq->curr_runnable_sum) in current window | |
529 | * | |
530 | * 'prev_window' represents task's contribution to cpu busy time | |
531 | * statistics (rq->prev_runnable_sum) in previous window | |
532 | */ | |
533 | u64 mark_start; | |
534 | u32 sum, demand; | |
535 | u32 sum_history[RAVG_HIST_SIZE_MAX]; | |
536 | u32 curr_window, prev_window; | |
537 | u16 active_windows; | |
538 | }; | |
539 | #endif | |
540 | ||
fa717060 | 541 | struct sched_rt_entity { |
5eca1c10 IM |
542 | struct list_head run_list; |
543 | unsigned long timeout; | |
544 | unsigned long watchdog_stamp; | |
545 | unsigned int time_slice; | |
546 | unsigned short on_rq; | |
547 | unsigned short on_list; | |
548 | ||
549 | struct sched_rt_entity *back; | |
052f1dc7 | 550 | #ifdef CONFIG_RT_GROUP_SCHED |
5eca1c10 | 551 | struct sched_rt_entity *parent; |
6f505b16 | 552 | /* rq on which this entity is (to be) queued: */ |
5eca1c10 | 553 | struct rt_rq *rt_rq; |
6f505b16 | 554 | /* rq "owned" by this entity/group: */ |
5eca1c10 | 555 | struct rt_rq *my_q; |
6f505b16 | 556 | #endif |
2cc05c49 JP |
557 | |
558 | #ifdef CONFIG_SMP | |
bce03ad5 JP |
559 | #ifdef CONFIG_SCHED_USE_FLUID_RT |
560 | int sync_flag; | |
561 | #endif | |
2cc05c49 JP |
562 | /* |
563 | * Per entity load average tracking. | |
564 | * | |
565 | * Put into separate cache line so it does not | |
566 | * collide with read-mostly values above. | |
567 | */ | |
568 | struct sched_avg avg;// ____cacheline_aligned_in_smp; | |
569 | #endif | |
3859a271 | 570 | } __randomize_layout; |
fa717060 | 571 | |
aab03e05 | 572 | struct sched_dl_entity { |
5eca1c10 | 573 | struct rb_node rb_node; |
aab03e05 DF |
574 | |
575 | /* | |
576 | * Original scheduling parameters. Copied here from sched_attr | |
4027d080 | 577 | * during sched_setattr(), they will remain the same until |
578 | * the next sched_setattr(). | |
aab03e05 | 579 | */ |
5eca1c10 IM |
580 | u64 dl_runtime; /* Maximum runtime for each instance */ |
581 | u64 dl_deadline; /* Relative deadline of each instance */ | |
582 | u64 dl_period; /* Separation of two instances (period) */ | |
54d6d303 | 583 | u64 dl_bw; /* dl_runtime / dl_period */ |
3effcb42 | 584 | u64 dl_density; /* dl_runtime / dl_deadline */ |
aab03e05 DF |
585 | |
586 | /* | |
587 | * Actual scheduling parameters. Initialized with the values above, | |
588 | * they are continously updated during task execution. Note that | |
589 | * the remaining runtime could be < 0 in case we are in overrun. | |
590 | */ | |
5eca1c10 IM |
591 | s64 runtime; /* Remaining runtime for this instance */ |
592 | u64 deadline; /* Absolute deadline for this instance */ | |
593 | unsigned int flags; /* Specifying the scheduler behaviour */ | |
aab03e05 DF |
594 | |
595 | /* | |
596 | * Some bool flags: | |
597 | * | |
598 | * @dl_throttled tells if we exhausted the runtime. If so, the | |
599 | * task has to wait for a replenishment to be performed at the | |
600 | * next firing of dl_timer. | |
601 | * | |
2d3d891d DF |
602 | * @dl_boosted tells if we are boosted due to DI. If so we are |
603 | * outside bandwidth enforcement mechanism (but only until we | |
5bfd126e JL |
604 | * exit the critical section); |
605 | * | |
5eca1c10 | 606 | * @dl_yielded tells if task gave up the CPU before consuming |
5bfd126e | 607 | * all its available runtime during the last job. |
209a0cbd LA |
608 | * |
609 | * @dl_non_contending tells if the task is inactive while still | |
610 | * contributing to the active utilization. In other words, it | |
611 | * indicates if the inactive timer has been armed and its handler | |
612 | * has not been executed yet. This flag is useful to avoid race | |
613 | * conditions between the inactive timer handler and the wakeup | |
614 | * code. | |
aab03e05 | 615 | */ |
5eca1c10 IM |
616 | int dl_throttled; |
617 | int dl_boosted; | |
618 | int dl_yielded; | |
209a0cbd | 619 | int dl_non_contending; |
aab03e05 DF |
620 | |
621 | /* | |
622 | * Bandwidth enforcement timer. Each -deadline task has its | |
623 | * own bandwidth to be enforced, thus we need one timer per task. | |
624 | */ | |
5eca1c10 | 625 | struct hrtimer dl_timer; |
209a0cbd LA |
626 | |
627 | /* | |
628 | * Inactive timer, responsible for decreasing the active utilization | |
629 | * at the "0-lag time". When a -deadline task blocks, it contributes | |
630 | * to GRUB's active utilization until the "0-lag time", hence a | |
631 | * timer is needed to decrease the active utilization at the correct | |
632 | * time. | |
633 | */ | |
634 | struct hrtimer inactive_timer; | |
aab03e05 | 635 | }; |
8bd75c77 | 636 | |
1d082fd0 PM |
637 | union rcu_special { |
638 | struct { | |
5eca1c10 IM |
639 | u8 blocked; |
640 | u8 need_qs; | |
641 | u8 exp_need_qs; | |
642 | ||
643 | /* Otherwise the compiler can store garbage here: */ | |
644 | u8 pad; | |
8203d6d0 PM |
645 | } b; /* Bits. */ |
646 | u32 s; /* Set of bits. */ | |
1d082fd0 | 647 | }; |
86848966 | 648 | |
8dc85d54 PZ |
649 | enum perf_event_task_context { |
650 | perf_invalid_context = -1, | |
651 | perf_hw_context = 0, | |
89a1e187 | 652 | perf_sw_context, |
8dc85d54 PZ |
653 | perf_nr_task_contexts, |
654 | }; | |
655 | ||
eb61baf6 IM |
656 | struct wake_q_node { |
657 | struct wake_q_node *next; | |
658 | }; | |
659 | ||
1da177e4 | 660 | struct task_struct { |
c65eacbe AL |
661 | #ifdef CONFIG_THREAD_INFO_IN_TASK |
662 | /* | |
663 | * For reasons of header soup (see current_thread_info()), this | |
664 | * must be the first element of task_struct. | |
665 | */ | |
5eca1c10 | 666 | struct thread_info thread_info; |
c65eacbe | 667 | #endif |
5eca1c10 IM |
668 | /* -1 unrunnable, 0 runnable, >0 stopped: */ |
669 | volatile long state; | |
29e48ce8 KC |
670 | |
671 | /* | |
672 | * This begins the randomizable portion of task_struct. Only | |
673 | * scheduling-critical items should be added above here. | |
674 | */ | |
675 | randomized_struct_fields_start | |
676 | ||
5eca1c10 IM |
677 | void *stack; |
678 | atomic_t usage; | |
679 | /* Per task flags (PF_*), defined further below: */ | |
680 | unsigned int flags; | |
681 | unsigned int ptrace; | |
1da177e4 | 682 | |
2dd73a4f | 683 | #ifdef CONFIG_SMP |
5eca1c10 IM |
684 | struct llist_node wake_entry; |
685 | int on_cpu; | |
c65eacbe | 686 | #ifdef CONFIG_THREAD_INFO_IN_TASK |
5eca1c10 IM |
687 | /* Current CPU: */ |
688 | unsigned int cpu; | |
c65eacbe | 689 | #endif |
5eca1c10 IM |
690 | unsigned int wakee_flips; |
691 | unsigned long wakee_flip_decay_ts; | |
692 | struct task_struct *last_wakee; | |
ac66f547 | 693 | |
5eca1c10 | 694 | int wake_cpu; |
2dd73a4f | 695 | #endif |
5eca1c10 IM |
696 | int on_rq; |
697 | ||
698 | int prio; | |
699 | int static_prio; | |
700 | int normal_prio; | |
701 | unsigned int rt_priority; | |
50e645a8 | 702 | |
5eca1c10 IM |
703 | const struct sched_class *sched_class; |
704 | struct sched_entity se; | |
705 | struct sched_rt_entity rt; | |
0bb35550 SV |
706 | #ifdef CONFIG_SCHED_WALT |
707 | struct ravg ravg; | |
708 | /* | |
709 | * 'init_load_pct' represents the initial task load assigned to children | |
710 | * of this task | |
711 | */ | |
712 | u32 init_load_pct; | |
713 | u64 last_sleep_ts; | |
714 | #endif | |
65b208cf JP |
715 | #ifdef CONFIG_SCHED_USE_FLUID_RT |
716 | int victim_flag; | |
717 | #endif | |
0bb35550 | 718 | |
0a548a53 PB |
719 | #ifdef CONFIG_SCHED_EMS |
720 | struct task_band *band; | |
721 | struct list_head band_members; | |
722 | #endif | |
723 | ||
8323f26c | 724 | #ifdef CONFIG_CGROUP_SCHED |
5eca1c10 | 725 | struct task_group *sched_task_group; |
8323f26c | 726 | #endif |
5eca1c10 | 727 | struct sched_dl_entity dl; |
1da177e4 | 728 | |
e107be36 | 729 | #ifdef CONFIG_PREEMPT_NOTIFIERS |
5eca1c10 IM |
730 | /* List of struct preempt_notifier: */ |
731 | struct hlist_head preempt_notifiers; | |
e107be36 AK |
732 | #endif |
733 | ||
6c5c9341 | 734 | #ifdef CONFIG_BLK_DEV_IO_TRACE |
5eca1c10 | 735 | unsigned int btrace_seq; |
6c5c9341 | 736 | #endif |
1da177e4 | 737 | |
5eca1c10 IM |
738 | unsigned int policy; |
739 | int nr_cpus_allowed; | |
740 | cpumask_t cpus_allowed; | |
1da177e4 | 741 | |
a57eb940 | 742 | #ifdef CONFIG_PREEMPT_RCU |
5eca1c10 IM |
743 | int rcu_read_lock_nesting; |
744 | union rcu_special rcu_read_unlock_special; | |
745 | struct list_head rcu_node_entry; | |
746 | struct rcu_node *rcu_blocked_node; | |
28f6569a | 747 | #endif /* #ifdef CONFIG_PREEMPT_RCU */ |
5eca1c10 | 748 | |
8315f422 | 749 | #ifdef CONFIG_TASKS_RCU |
5eca1c10 | 750 | unsigned long rcu_tasks_nvcsw; |
ccdd29ff PM |
751 | u8 rcu_tasks_holdout; |
752 | u8 rcu_tasks_idx; | |
5eca1c10 | 753 | int rcu_tasks_idle_cpu; |
ccdd29ff | 754 | struct list_head rcu_tasks_holdout_list; |
8315f422 | 755 | #endif /* #ifdef CONFIG_TASKS_RCU */ |
e260be67 | 756 | |
5eca1c10 | 757 | struct sched_info sched_info; |
1da177e4 | 758 | |
5eca1c10 | 759 | struct list_head tasks; |
806c09a7 | 760 | #ifdef CONFIG_SMP |
5eca1c10 IM |
761 | struct plist_node pushable_tasks; |
762 | struct rb_node pushable_dl_tasks; | |
806c09a7 | 763 | #endif |
1da177e4 | 764 | |
5eca1c10 IM |
765 | struct mm_struct *mm; |
766 | struct mm_struct *active_mm; | |
314ff785 IM |
767 | |
768 | /* Per-thread vma caching: */ | |
5eca1c10 | 769 | struct vmacache vmacache; |
314ff785 | 770 | |
5eca1c10 IM |
771 | #ifdef SPLIT_RSS_COUNTING |
772 | struct task_rss_stat rss_stat; | |
34e55232 | 773 | #endif |
5eca1c10 IM |
774 | int exit_state; |
775 | int exit_code; | |
776 | int exit_signal; | |
777 | /* The signal sent when the parent dies: */ | |
778 | int pdeath_signal; | |
779 | /* JOBCTL_*, siglock protected: */ | |
780 | unsigned long jobctl; | |
781 | ||
782 | /* Used for emulating ABI behavior of previous Linux versions: */ | |
783 | unsigned int personality; | |
784 | ||
785 | /* Scheduler bits, serialized by scheduler locks: */ | |
786 | unsigned sched_reset_on_fork:1; | |
787 | unsigned sched_contributes_to_load:1; | |
788 | unsigned sched_migrated:1; | |
789 | unsigned sched_remote_wakeup:1; | |
7cafcfd8 JW |
790 | #ifdef CONFIG_PSI |
791 | unsigned sched_psi_wake_requeue:1; | |
792 | #endif | |
793 | ||
5eca1c10 IM |
794 | /* Force alignment to the next boundary: */ |
795 | unsigned :0; | |
796 | ||
797 | /* Unserialized, strictly 'current' */ | |
798 | ||
799 | /* Bit to tell LSMs we're in execve(): */ | |
800 | unsigned in_execve:1; | |
801 | unsigned in_iowait:1; | |
802 | #ifndef TIF_RESTORE_SIGMASK | |
803 | unsigned restore_sigmask:1; | |
7e781418 | 804 | #endif |
626ebc41 | 805 | #ifdef CONFIG_MEMCG |
5eca1c10 | 806 | unsigned memcg_may_oom:1; |
127424c8 | 807 | #ifndef CONFIG_SLOB |
5eca1c10 | 808 | unsigned memcg_kmem_skip_account:1; |
6f185c29 | 809 | #endif |
127424c8 | 810 | #endif |
ff303e66 | 811 | #ifdef CONFIG_COMPAT_BRK |
5eca1c10 | 812 | unsigned brk_randomized:1; |
ff303e66 | 813 | #endif |
77f88796 TH |
814 | #ifdef CONFIG_CGROUPS |
815 | /* disallow userland-initiated cgroup migration */ | |
816 | unsigned no_cgroup_migration:1; | |
817 | #endif | |
6f185c29 | 818 | |
5eca1c10 | 819 | unsigned long atomic_flags; /* Flags requiring atomic access. */ |
1d4457f9 | 820 | |
5eca1c10 | 821 | struct restart_block restart_block; |
f56141e3 | 822 | |
5eca1c10 IM |
823 | pid_t pid; |
824 | pid_t tgid; | |
0a425405 | 825 | |
1314562a | 826 | #ifdef CONFIG_CC_STACKPROTECTOR |
5eca1c10 IM |
827 | /* Canary value for the -fstack-protector GCC feature: */ |
828 | unsigned long stack_canary; | |
1314562a | 829 | #endif |
4d1d61a6 | 830 | /* |
5eca1c10 | 831 | * Pointers to the (original) parent process, youngest child, younger sibling, |
4d1d61a6 | 832 | * older sibling, respectively. (p->father can be replaced with |
f470021a | 833 | * p->real_parent->pid) |
1da177e4 | 834 | */ |
5eca1c10 IM |
835 | |
836 | /* Real parent process: */ | |
837 | struct task_struct __rcu *real_parent; | |
838 | ||
839 | /* Recipient of SIGCHLD, wait4() reports: */ | |
840 | struct task_struct __rcu *parent; | |
841 | ||
1da177e4 | 842 | /* |
5eca1c10 | 843 | * Children/sibling form the list of natural children: |
1da177e4 | 844 | */ |
5eca1c10 IM |
845 | struct list_head children; |
846 | struct list_head sibling; | |
847 | struct task_struct *group_leader; | |
1da177e4 | 848 | |
f470021a | 849 | /* |
5eca1c10 IM |
850 | * 'ptraced' is the list of tasks this task is using ptrace() on. |
851 | * | |
f470021a | 852 | * This includes both natural children and PTRACE_ATTACH targets. |
5eca1c10 | 853 | * 'ptrace_entry' is this task's link on the p->parent->ptraced list. |
f470021a | 854 | */ |
5eca1c10 IM |
855 | struct list_head ptraced; |
856 | struct list_head ptrace_entry; | |
f470021a | 857 | |
1da177e4 | 858 | /* PID/PID hash table linkage. */ |
5eca1c10 IM |
859 | struct pid_link pids[PIDTYPE_MAX]; |
860 | struct list_head thread_group; | |
861 | struct list_head thread_node; | |
862 | ||
863 | struct completion *vfork_done; | |
1da177e4 | 864 | |
5eca1c10 IM |
865 | /* CLONE_CHILD_SETTID: */ |
866 | int __user *set_child_tid; | |
1da177e4 | 867 | |
5eca1c10 IM |
868 | /* CLONE_CHILD_CLEARTID: */ |
869 | int __user *clear_child_tid; | |
870 | ||
871 | u64 utime; | |
872 | u64 stime; | |
40565b5a | 873 | #ifdef CONFIG_ARCH_HAS_SCALED_CPUTIME |
5eca1c10 IM |
874 | u64 utimescaled; |
875 | u64 stimescaled; | |
40565b5a | 876 | #endif |
5eca1c10 | 877 | u64 gtime; |
42d293dc CB |
878 | #ifdef CONFIG_CPU_FREQ_TIMES |
879 | u64 *time_in_state; | |
880 | unsigned int max_state; | |
881 | #endif | |
5eca1c10 | 882 | struct prev_cputime prev_cputime; |
6a61671b | 883 | #ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN |
bac5b6b6 | 884 | struct vtime vtime; |
d99ca3b9 | 885 | #endif |
d027d45d FW |
886 | |
887 | #ifdef CONFIG_NO_HZ_FULL | |
5eca1c10 | 888 | atomic_t tick_dep_mask; |
d027d45d | 889 | #endif |
5eca1c10 IM |
890 | /* Context switch counts: */ |
891 | unsigned long nvcsw; | |
892 | unsigned long nivcsw; | |
893 | ||
894 | /* Monotonic time in nsecs: */ | |
895 | u64 start_time; | |
896 | ||
897 | /* Boot based time in nsecs: */ | |
898 | u64 real_start_time; | |
899 | ||
900 | /* MM fault and swap info: this can arguably be seen as either mm-specific or thread-specific: */ | |
901 | unsigned long min_flt; | |
902 | unsigned long maj_flt; | |
1da177e4 | 903 | |
b18b6a9c | 904 | #ifdef CONFIG_POSIX_TIMERS |
5eca1c10 IM |
905 | struct task_cputime cputime_expires; |
906 | struct list_head cpu_timers[3]; | |
b18b6a9c | 907 | #endif |
1da177e4 | 908 | |
5eca1c10 IM |
909 | /* Process credentials: */ |
910 | ||
911 | /* Tracer's credentials at attach: */ | |
912 | const struct cred __rcu *ptracer_cred; | |
913 | ||
914 | /* Objective and real subjective task credentials (COW): */ | |
915 | const struct cred __rcu *real_cred; | |
916 | ||
917 | /* Effective (overridable) subjective task credentials (COW): */ | |
918 | const struct cred __rcu *cred; | |
919 | ||
920 | /* | |
921 | * executable name, excluding path. | |
922 | * | |
923 | * - normally initialized setup_new_exec() | |
924 | * - access it with [gs]et_task_comm() | |
925 | * - lock it with task_lock() | |
926 | */ | |
927 | char comm[TASK_COMM_LEN]; | |
928 | ||
929 | struct nameidata *nameidata; | |
930 | ||
3d5b6fcc | 931 | #ifdef CONFIG_SYSVIPC |
5eca1c10 IM |
932 | struct sysv_sem sysvsem; |
933 | struct sysv_shm sysvshm; | |
3d5b6fcc | 934 | #endif |
e162b39a | 935 | #ifdef CONFIG_DETECT_HUNG_TASK |
5eca1c10 | 936 | unsigned long last_switch_count; |
82a1fcb9 | 937 | #endif |
5eca1c10 IM |
938 | /* Filesystem information: */ |
939 | struct fs_struct *fs; | |
940 | ||
941 | /* Open file information: */ | |
942 | struct files_struct *files; | |
943 | ||
944 | /* Namespaces: */ | |
945 | struct nsproxy *nsproxy; | |
946 | ||
947 | /* Signal handlers: */ | |
948 | struct signal_struct *signal; | |
949 | struct sighand_struct *sighand; | |
950 | sigset_t blocked; | |
951 | sigset_t real_blocked; | |
952 | /* Restored if set_restore_sigmask() was used: */ | |
953 | sigset_t saved_sigmask; | |
954 | struct sigpending pending; | |
955 | unsigned long sas_ss_sp; | |
956 | size_t sas_ss_size; | |
957 | unsigned int sas_ss_flags; | |
958 | ||
959 | struct callback_head *task_works; | |
960 | ||
961 | struct audit_context *audit_context; | |
bfef93a5 | 962 | #ifdef CONFIG_AUDITSYSCALL |
5eca1c10 IM |
963 | kuid_t loginuid; |
964 | unsigned int sessionid; | |
bfef93a5 | 965 | #endif |
5eca1c10 IM |
966 | struct seccomp seccomp; |
967 | ||
968 | /* Thread group tracking: */ | |
969 | u32 parent_exec_id; | |
970 | u32 self_exec_id; | |
1da177e4 | 971 | |
5eca1c10 IM |
972 | /* Protection against (de-)allocation: mm, files, fs, tty, keyrings, mems_allowed, mempolicy: */ |
973 | spinlock_t alloc_lock; | |
1da177e4 | 974 | |
b29739f9 | 975 | /* Protection of the PI data structures: */ |
5eca1c10 | 976 | raw_spinlock_t pi_lock; |
b29739f9 | 977 | |
5eca1c10 | 978 | struct wake_q_node wake_q; |
76751049 | 979 | |
23f78d4a | 980 | #ifdef CONFIG_RT_MUTEXES |
5eca1c10 | 981 | /* PI waiters blocked on a rt_mutex held by this task: */ |
a23ba907 | 982 | struct rb_root_cached pi_waiters; |
e96a7705 XP |
983 | /* Updated under owner's pi_lock and rq lock */ |
984 | struct task_struct *pi_top_task; | |
5eca1c10 IM |
985 | /* Deadlock detection and priority inheritance handling: */ |
986 | struct rt_mutex_waiter *pi_blocked_on; | |
23f78d4a IM |
987 | #endif |
988 | ||
be075489 MK |
989 | #ifdef CONFIG_MM_EVENT_STAT |
990 | struct mm_event_task mm_event[MM_TYPE_NUM]; | |
991 | unsigned long next_period; | |
992 | #endif | |
408894ee | 993 | #ifdef CONFIG_DEBUG_MUTEXES |
5eca1c10 IM |
994 | /* Mutex deadlock detection: */ |
995 | struct mutex_waiter *blocked_on; | |
408894ee | 996 | #endif |
5eca1c10 | 997 | |
de30a2b3 | 998 | #ifdef CONFIG_TRACE_IRQFLAGS |
5eca1c10 IM |
999 | unsigned int irq_events; |
1000 | unsigned long hardirq_enable_ip; | |
1001 | unsigned long hardirq_disable_ip; | |
1002 | unsigned int hardirq_enable_event; | |
1003 | unsigned int hardirq_disable_event; | |
1004 | int hardirqs_enabled; | |
1005 | int hardirq_context; | |
1006 | unsigned long softirq_disable_ip; | |
1007 | unsigned long softirq_enable_ip; | |
1008 | unsigned int softirq_disable_event; | |
1009 | unsigned int softirq_enable_event; | |
1010 | int softirqs_enabled; | |
1011 | int softirq_context; | |
de30a2b3 | 1012 | #endif |
5eca1c10 | 1013 | |
fbb9ce95 | 1014 | #ifdef CONFIG_LOCKDEP |
5eca1c10 IM |
1015 | # define MAX_LOCK_DEPTH 48UL |
1016 | u64 curr_chain_key; | |
1017 | int lockdep_depth; | |
1018 | unsigned int lockdep_recursion; | |
1019 | struct held_lock held_locks[MAX_LOCK_DEPTH]; | |
fbb9ce95 | 1020 | #endif |
5eca1c10 | 1021 | |
b09be676 BP |
1022 | #ifdef CONFIG_LOCKDEP_CROSSRELEASE |
1023 | #define MAX_XHLOCKS_NR 64UL | |
1024 | struct hist_lock *xhlocks; /* Crossrelease history locks */ | |
1025 | unsigned int xhlock_idx; | |
1026 | /* For restoring at history boundaries */ | |
1027 | unsigned int xhlock_idx_hist[XHLOCK_CTX_NR]; | |
23f873d8 BP |
1028 | unsigned int hist_id; |
1029 | /* For overwrite check at each context exit */ | |
1030 | unsigned int hist_id_save[XHLOCK_CTX_NR]; | |
fbb9ce95 | 1031 | #endif |
5eca1c10 | 1032 | |
c6d30853 | 1033 | #ifdef CONFIG_UBSAN |
5eca1c10 | 1034 | unsigned int in_ubsan; |
c6d30853 | 1035 | #endif |
408894ee | 1036 | |
5eca1c10 IM |
1037 | /* Journalling filesystem info: */ |
1038 | void *journal_info; | |
1da177e4 | 1039 | |
5eca1c10 IM |
1040 | /* Stacked block device info: */ |
1041 | struct bio_list *bio_list; | |
d89d8796 | 1042 | |
73c10101 | 1043 | #ifdef CONFIG_BLOCK |
5eca1c10 IM |
1044 | /* Stack plugging: */ |
1045 | struct blk_plug *plug; | |
73c10101 JA |
1046 | #endif |
1047 | ||
5eca1c10 IM |
1048 | /* VM state: */ |
1049 | struct reclaim_state *reclaim_state; | |
1050 | ||
1051 | struct backing_dev_info *backing_dev_info; | |
1da177e4 | 1052 | |
5eca1c10 | 1053 | struct io_context *io_context; |
1da177e4 | 1054 | |
5eca1c10 IM |
1055 | /* Ptrace state: */ |
1056 | unsigned long ptrace_message; | |
1057 | siginfo_t *last_siginfo; | |
1da177e4 | 1058 | |
5eca1c10 | 1059 | struct task_io_accounting ioac; |
7cafcfd8 JW |
1060 | #ifdef CONFIG_PSI |
1061 | /* Pressure stall state */ | |
1062 | unsigned int psi_flags; | |
1063 | #endif | |
5eca1c10 IM |
1064 | #ifdef CONFIG_TASK_XACCT |
1065 | /* Accumulated RSS usage: */ | |
1066 | u64 acct_rss_mem1; | |
1067 | /* Accumulated virtual memory usage: */ | |
1068 | u64 acct_vm_mem1; | |
1069 | /* stime + utime since last update: */ | |
1070 | u64 acct_timexpd; | |
1da177e4 LT |
1071 | #endif |
1072 | #ifdef CONFIG_CPUSETS | |
5eca1c10 IM |
1073 | /* Protected by ->alloc_lock: */ |
1074 | nodemask_t mems_allowed; | |
1075 | /* Seqence number to catch updates: */ | |
1076 | seqcount_t mems_allowed_seq; | |
1077 | int cpuset_mem_spread_rotor; | |
1078 | int cpuset_slab_spread_rotor; | |
1da177e4 | 1079 | #endif |
ddbcc7e8 | 1080 | #ifdef CONFIG_CGROUPS |
5eca1c10 IM |
1081 | /* Control Group info protected by css_set_lock: */ |
1082 | struct css_set __rcu *cgroups; | |
1083 | /* cg_list protected by css_set_lock and tsk->alloc_lock: */ | |
1084 | struct list_head cg_list; | |
ddbcc7e8 | 1085 | #endif |
f01d7d51 | 1086 | #ifdef CONFIG_INTEL_RDT |
0734ded1 | 1087 | u32 closid; |
d6aaba61 | 1088 | u32 rmid; |
e02737d5 | 1089 | #endif |
42b2dd0a | 1090 | #ifdef CONFIG_FUTEX |
5eca1c10 | 1091 | struct robust_list_head __user *robust_list; |
34f192c6 IM |
1092 | #ifdef CONFIG_COMPAT |
1093 | struct compat_robust_list_head __user *compat_robust_list; | |
1094 | #endif | |
5eca1c10 IM |
1095 | struct list_head pi_state_list; |
1096 | struct futex_pi_state *pi_state_cache; | |
c7aceaba | 1097 | #endif |
cdd6c482 | 1098 | #ifdef CONFIG_PERF_EVENTS |
5eca1c10 IM |
1099 | struct perf_event_context *perf_event_ctxp[perf_nr_task_contexts]; |
1100 | struct mutex perf_event_mutex; | |
1101 | struct list_head perf_event_list; | |
a63eaf34 | 1102 | #endif |
8f47b187 | 1103 | #ifdef CONFIG_DEBUG_PREEMPT |
5eca1c10 | 1104 | unsigned long preempt_disable_ip; |
8f47b187 | 1105 | #endif |
c7aceaba | 1106 | #ifdef CONFIG_NUMA |
5eca1c10 IM |
1107 | /* Protected by alloc_lock: */ |
1108 | struct mempolicy *mempolicy; | |
45816682 | 1109 | short il_prev; |
5eca1c10 | 1110 | short pref_node_fork; |
42b2dd0a | 1111 | #endif |
cbee9f88 | 1112 | #ifdef CONFIG_NUMA_BALANCING |
5eca1c10 IM |
1113 | int numa_scan_seq; |
1114 | unsigned int numa_scan_period; | |
1115 | unsigned int numa_scan_period_max; | |
1116 | int numa_preferred_nid; | |
1117 | unsigned long numa_migrate_retry; | |
1118 | /* Migration stamp: */ | |
1119 | u64 node_stamp; | |
1120 | u64 last_task_numa_placement; | |
1121 | u64 last_sum_exec_runtime; | |
1122 | struct callback_head numa_work; | |
1123 | ||
1124 | struct list_head numa_entry; | |
1125 | struct numa_group *numa_group; | |
8c8a743c | 1126 | |
745d6147 | 1127 | /* |
44dba3d5 IM |
1128 | * numa_faults is an array split into four regions: |
1129 | * faults_memory, faults_cpu, faults_memory_buffer, faults_cpu_buffer | |
1130 | * in this precise order. | |
1131 | * | |
1132 | * faults_memory: Exponential decaying average of faults on a per-node | |
1133 | * basis. Scheduling placement decisions are made based on these | |
1134 | * counts. The values remain static for the duration of a PTE scan. | |
1135 | * faults_cpu: Track the nodes the process was running on when a NUMA | |
1136 | * hinting fault was incurred. | |
1137 | * faults_memory_buffer and faults_cpu_buffer: Record faults per node | |
1138 | * during the current scan window. When the scan completes, the counts | |
1139 | * in faults_memory and faults_cpu decay and these values are copied. | |
745d6147 | 1140 | */ |
5eca1c10 IM |
1141 | unsigned long *numa_faults; |
1142 | unsigned long total_numa_faults; | |
745d6147 | 1143 | |
04bb2f94 RR |
1144 | /* |
1145 | * numa_faults_locality tracks if faults recorded during the last | |
074c2381 MG |
1146 | * scan window were remote/local or failed to migrate. The task scan |
1147 | * period is adapted based on the locality of the faults with different | |
1148 | * weights depending on whether they were shared or private faults | |
04bb2f94 | 1149 | */ |
5eca1c10 | 1150 | unsigned long numa_faults_locality[3]; |
04bb2f94 | 1151 | |
5eca1c10 | 1152 | unsigned long numa_pages_migrated; |
cbee9f88 PZ |
1153 | #endif /* CONFIG_NUMA_BALANCING */ |
1154 | ||
5eca1c10 | 1155 | struct tlbflush_unmap_batch tlb_ubc; |
72b252ae | 1156 | |
5eca1c10 | 1157 | struct rcu_head rcu; |
b92ce558 | 1158 | |
5eca1c10 IM |
1159 | /* Cache last used pipe for splice(): */ |
1160 | struct pipe_inode_info *splice_pipe; | |
5640f768 | 1161 | |
5eca1c10 | 1162 | struct page_frag task_frag; |
5640f768 | 1163 | |
47913d4e IM |
1164 | #ifdef CONFIG_TASK_DELAY_ACCT |
1165 | struct task_delay_info *delays; | |
f4f154fd | 1166 | #endif |
47913d4e | 1167 | |
f4f154fd | 1168 | #ifdef CONFIG_FAULT_INJECTION |
5eca1c10 | 1169 | int make_it_fail; |
9049f2f6 | 1170 | unsigned int fail_nth; |
ca74e92b | 1171 | #endif |
9d823e8f | 1172 | /* |
5eca1c10 IM |
1173 | * When (nr_dirtied >= nr_dirtied_pause), it's time to call |
1174 | * balance_dirty_pages() for a dirty throttling pause: | |
9d823e8f | 1175 | */ |
5eca1c10 IM |
1176 | int nr_dirtied; |
1177 | int nr_dirtied_pause; | |
1178 | /* Start of a write-and-pause period: */ | |
1179 | unsigned long dirty_paused_when; | |
9d823e8f | 1180 | |
9745512c | 1181 | #ifdef CONFIG_LATENCYTOP |
5eca1c10 IM |
1182 | int latency_record_count; |
1183 | struct latency_record latency_record[LT_SAVECOUNT]; | |
9745512c | 1184 | #endif |
6976675d | 1185 | /* |
5eca1c10 | 1186 | * Time slack values; these are used to round up poll() and |
6976675d AV |
1187 | * select() etc timeout values. These are in nanoseconds. |
1188 | */ | |
5eca1c10 IM |
1189 | u64 timer_slack_ns; |
1190 | u64 default_timer_slack_ns; | |
f8d570a4 | 1191 | |
0b24becc | 1192 | #ifdef CONFIG_KASAN |
5eca1c10 | 1193 | unsigned int kasan_depth; |
0b24becc | 1194 | #endif |
5eca1c10 | 1195 | |
fb52607a | 1196 | #ifdef CONFIG_FUNCTION_GRAPH_TRACER |
5eca1c10 IM |
1197 | /* Index of current stored address in ret_stack: */ |
1198 | int curr_ret_stack; | |
1199 | ||
1200 | /* Stack of return addresses for return function tracing: */ | |
1201 | struct ftrace_ret_stack *ret_stack; | |
1202 | ||
1203 | /* Timestamp for last schedule: */ | |
1204 | unsigned long long ftrace_timestamp; | |
1205 | ||
f201ae23 FW |
1206 | /* |
1207 | * Number of functions that haven't been traced | |
5eca1c10 | 1208 | * because of depth overrun: |
f201ae23 | 1209 | */ |
5eca1c10 IM |
1210 | atomic_t trace_overrun; |
1211 | ||
1212 | /* Pause tracing: */ | |
1213 | atomic_t tracing_graph_pause; | |
f201ae23 | 1214 | #endif |
5eca1c10 | 1215 | |
ea4e2bc4 | 1216 | #ifdef CONFIG_TRACING |
5eca1c10 IM |
1217 | /* State flags for use by tracers: */ |
1218 | unsigned long trace; | |
1219 | ||
1220 | /* Bitmask and counter of trace recursion: */ | |
1221 | unsigned long trace_recursion; | |
261842b7 | 1222 | #endif /* CONFIG_TRACING */ |
5eca1c10 | 1223 | |
5c9a8750 | 1224 | #ifdef CONFIG_KCOV |
5eca1c10 IM |
1225 | /* Coverage collection mode enabled for this task (0 if disabled): */ |
1226 | enum kcov_mode kcov_mode; | |
1227 | ||
1228 | /* Size of the kcov_area: */ | |
1229 | unsigned int kcov_size; | |
1230 | ||
1231 | /* Buffer for coverage collection: */ | |
1232 | void *kcov_area; | |
1233 | ||
1234 | /* KCOV descriptor wired with this task or NULL: */ | |
1235 | struct kcov *kcov; | |
5c9a8750 | 1236 | #endif |
5eca1c10 | 1237 | |
6f185c29 | 1238 | #ifdef CONFIG_MEMCG |
5eca1c10 IM |
1239 | struct mem_cgroup *memcg_in_oom; |
1240 | gfp_t memcg_oom_gfp_mask; | |
1241 | int memcg_oom_order; | |
b23afb93 | 1242 | |
5eca1c10 IM |
1243 | /* Number of pages to reclaim on returning to userland: */ |
1244 | unsigned int memcg_nr_pages_over_high; | |
569b846d | 1245 | #endif |
5eca1c10 | 1246 | |
0326f5a9 | 1247 | #ifdef CONFIG_UPROBES |
5eca1c10 | 1248 | struct uprobe_task *utask; |
0326f5a9 | 1249 | #endif |
cafe5635 | 1250 | #if defined(CONFIG_BCACHE) || defined(CONFIG_BCACHE_MODULE) |
5eca1c10 IM |
1251 | unsigned int sequential_io; |
1252 | unsigned int sequential_io_avg; | |
cafe5635 | 1253 | #endif |
8eb23b9f | 1254 | #ifdef CONFIG_DEBUG_ATOMIC_SLEEP |
5eca1c10 | 1255 | unsigned long task_state_change; |
8eb23b9f | 1256 | #endif |
5eca1c10 | 1257 | int pagefault_disabled; |
03049269 | 1258 | #ifdef CONFIG_MMU |
5eca1c10 | 1259 | struct task_struct *oom_reaper_list; |
03049269 | 1260 | #endif |
ba14a194 | 1261 | #ifdef CONFIG_VMAP_STACK |
5eca1c10 | 1262 | struct vm_struct *stack_vm_area; |
ba14a194 | 1263 | #endif |
68f24b08 | 1264 | #ifdef CONFIG_THREAD_INFO_IN_TASK |
5eca1c10 IM |
1265 | /* A live task holds one reference: */ |
1266 | atomic_t stack_refcount; | |
d83a7cb3 JP |
1267 | #endif |
1268 | #ifdef CONFIG_LIVEPATCH | |
1269 | int patch_state; | |
0302e28d | 1270 | #endif |
e4e55b47 TH |
1271 | #ifdef CONFIG_SECURITY |
1272 | /* Used by LSM modules for access restriction: */ | |
1273 | void *security; | |
68f24b08 | 1274 | #endif |
29e48ce8 KC |
1275 | |
1276 | /* | |
1277 | * New fields for task_struct should be added above here, so that | |
1278 | * they are included in the randomized portion of task_struct. | |
1279 | */ | |
1280 | randomized_struct_fields_end | |
1281 | ||
5eca1c10 IM |
1282 | /* CPU-specific state of this task: */ |
1283 | struct thread_struct thread; | |
1284 | ||
1285 | /* | |
1286 | * WARNING: on x86, 'thread_struct' contains a variable-sized | |
1287 | * structure. It *MUST* be at the end of 'task_struct'. | |
1288 | * | |
1289 | * Do not put anything below here! | |
1290 | */ | |
1da177e4 LT |
1291 | }; |
1292 | ||
e868171a | 1293 | static inline struct pid *task_pid(struct task_struct *task) |
22c935f4 EB |
1294 | { |
1295 | return task->pids[PIDTYPE_PID].pid; | |
1296 | } | |
1297 | ||
e868171a | 1298 | static inline struct pid *task_tgid(struct task_struct *task) |
22c935f4 EB |
1299 | { |
1300 | return task->group_leader->pids[PIDTYPE_PID].pid; | |
1301 | } | |
1302 | ||
6dda81f4 | 1303 | /* |
5eca1c10 | 1304 | * Without tasklist or RCU lock it is not safe to dereference |
6dda81f4 ON |
1305 | * the result of task_pgrp/task_session even if task == current, |
1306 | * we can race with another thread doing sys_setsid/sys_setpgid. | |
1307 | */ | |
e868171a | 1308 | static inline struct pid *task_pgrp(struct task_struct *task) |
22c935f4 EB |
1309 | { |
1310 | return task->group_leader->pids[PIDTYPE_PGID].pid; | |
1311 | } | |
1312 | ||
e868171a | 1313 | static inline struct pid *task_session(struct task_struct *task) |
22c935f4 EB |
1314 | { |
1315 | return task->group_leader->pids[PIDTYPE_SID].pid; | |
1316 | } | |
1317 | ||
7af57294 PE |
1318 | /* |
1319 | * the helpers to get the task's different pids as they are seen | |
1320 | * from various namespaces | |
1321 | * | |
1322 | * task_xid_nr() : global id, i.e. the id seen from the init namespace; | |
44c4e1b2 EB |
1323 | * task_xid_vnr() : virtual id, i.e. the id seen from the pid namespace of |
1324 | * current. | |
7af57294 PE |
1325 | * task_xid_nr_ns() : id seen from the ns specified; |
1326 | * | |
7af57294 PE |
1327 | * see also pid_nr() etc in include/linux/pid.h |
1328 | */ | |
5eca1c10 | 1329 | pid_t __task_pid_nr_ns(struct task_struct *task, enum pid_type type, struct pid_namespace *ns); |
7af57294 | 1330 | |
e868171a | 1331 | static inline pid_t task_pid_nr(struct task_struct *tsk) |
7af57294 PE |
1332 | { |
1333 | return tsk->pid; | |
1334 | } | |
1335 | ||
5eca1c10 | 1336 | static inline pid_t task_pid_nr_ns(struct task_struct *tsk, struct pid_namespace *ns) |
52ee2dfd ON |
1337 | { |
1338 | return __task_pid_nr_ns(tsk, PIDTYPE_PID, ns); | |
1339 | } | |
7af57294 PE |
1340 | |
1341 | static inline pid_t task_pid_vnr(struct task_struct *tsk) | |
1342 | { | |
52ee2dfd | 1343 | return __task_pid_nr_ns(tsk, PIDTYPE_PID, NULL); |
7af57294 PE |
1344 | } |
1345 | ||
1346 | ||
e868171a | 1347 | static inline pid_t task_tgid_nr(struct task_struct *tsk) |
7af57294 PE |
1348 | { |
1349 | return tsk->tgid; | |
1350 | } | |
1351 | ||
5eca1c10 IM |
1352 | /** |
1353 | * pid_alive - check that a task structure is not stale | |
1354 | * @p: Task structure to be checked. | |
1355 | * | |
1356 | * Test if a process is not yet dead (at most zombie state) | |
1357 | * If pid_alive fails, then pointers within the task structure | |
1358 | * can be stale and must not be dereferenced. | |
1359 | * | |
1360 | * Return: 1 if the process is alive. 0 otherwise. | |
1361 | */ | |
1362 | static inline int pid_alive(const struct task_struct *p) | |
1363 | { | |
1364 | return p->pids[PIDTYPE_PID].pid != NULL; | |
1365 | } | |
7af57294 | 1366 | |
5eca1c10 | 1367 | static inline pid_t task_pgrp_nr_ns(struct task_struct *tsk, struct pid_namespace *ns) |
7af57294 | 1368 | { |
52ee2dfd | 1369 | return __task_pid_nr_ns(tsk, PIDTYPE_PGID, ns); |
7af57294 PE |
1370 | } |
1371 | ||
7af57294 PE |
1372 | static inline pid_t task_pgrp_vnr(struct task_struct *tsk) |
1373 | { | |
52ee2dfd | 1374 | return __task_pid_nr_ns(tsk, PIDTYPE_PGID, NULL); |
7af57294 PE |
1375 | } |
1376 | ||
1377 | ||
5eca1c10 | 1378 | static inline pid_t task_session_nr_ns(struct task_struct *tsk, struct pid_namespace *ns) |
7af57294 | 1379 | { |
52ee2dfd | 1380 | return __task_pid_nr_ns(tsk, PIDTYPE_SID, ns); |
7af57294 PE |
1381 | } |
1382 | ||
7af57294 PE |
1383 | static inline pid_t task_session_vnr(struct task_struct *tsk) |
1384 | { | |
52ee2dfd | 1385 | return __task_pid_nr_ns(tsk, PIDTYPE_SID, NULL); |
7af57294 PE |
1386 | } |
1387 | ||
dd1c1f2f ON |
1388 | static inline pid_t task_tgid_nr_ns(struct task_struct *tsk, struct pid_namespace *ns) |
1389 | { | |
1390 | return __task_pid_nr_ns(tsk, __PIDTYPE_TGID, ns); | |
1391 | } | |
1392 | ||
1393 | static inline pid_t task_tgid_vnr(struct task_struct *tsk) | |
1394 | { | |
1395 | return __task_pid_nr_ns(tsk, __PIDTYPE_TGID, NULL); | |
1396 | } | |
1397 | ||
1398 | static inline pid_t task_ppid_nr_ns(const struct task_struct *tsk, struct pid_namespace *ns) | |
1399 | { | |
1400 | pid_t pid = 0; | |
1401 | ||
1402 | rcu_read_lock(); | |
1403 | if (pid_alive(tsk)) | |
1404 | pid = task_tgid_nr_ns(rcu_dereference(tsk->real_parent), ns); | |
1405 | rcu_read_unlock(); | |
1406 | ||
1407 | return pid; | |
1408 | } | |
1409 | ||
1410 | static inline pid_t task_ppid_nr(const struct task_struct *tsk) | |
1411 | { | |
1412 | return task_ppid_nr_ns(tsk, &init_pid_ns); | |
1413 | } | |
1414 | ||
5eca1c10 | 1415 | /* Obsolete, do not use: */ |
1b0f7ffd ON |
1416 | static inline pid_t task_pgrp_nr(struct task_struct *tsk) |
1417 | { | |
1418 | return task_pgrp_nr_ns(tsk, &init_pid_ns); | |
1419 | } | |
7af57294 | 1420 | |
06eb6184 PZ |
1421 | #define TASK_REPORT_IDLE (TASK_REPORT + 1) |
1422 | #define TASK_REPORT_MAX (TASK_REPORT_IDLE << 1) | |
1423 | ||
1593baab | 1424 | static inline unsigned int __get_task_state(struct task_struct *tsk) |
20435d84 | 1425 | { |
1593baab PZ |
1426 | unsigned int tsk_state = READ_ONCE(tsk->state); |
1427 | unsigned int state = (tsk_state | tsk->exit_state) & TASK_REPORT; | |
20435d84 | 1428 | |
06eb6184 PZ |
1429 | BUILD_BUG_ON_NOT_POWER_OF_2(TASK_REPORT_MAX); |
1430 | ||
06eb6184 PZ |
1431 | if (tsk_state == TASK_IDLE) |
1432 | state = TASK_REPORT_IDLE; | |
1433 | ||
1593baab PZ |
1434 | return fls(state); |
1435 | } | |
1436 | ||
1437 | static inline char __task_state_to_char(unsigned int state) | |
1438 | { | |
8ef9925b | 1439 | static const char state_char[] = "RSDTtXZPI"; |
1593baab | 1440 | |
06eb6184 | 1441 | BUILD_BUG_ON(1 + ilog2(TASK_REPORT_MAX) != sizeof(state_char) - 1); |
20435d84 | 1442 | |
1593baab PZ |
1443 | return state_char[state]; |
1444 | } | |
1445 | ||
1446 | static inline char task_state_to_char(struct task_struct *tsk) | |
1447 | { | |
1448 | return __task_state_to_char(__get_task_state(tsk)); | |
20435d84 XX |
1449 | } |
1450 | ||
f400e198 | 1451 | /** |
570f5241 SS |
1452 | * is_global_init - check if a task structure is init. Since init |
1453 | * is free to have sub-threads we need to check tgid. | |
3260259f HK |
1454 | * @tsk: Task structure to be checked. |
1455 | * | |
1456 | * Check if a task structure is the first user space task the kernel created. | |
e69f6186 YB |
1457 | * |
1458 | * Return: 1 if the task structure is init. 0 otherwise. | |
b460cbc5 | 1459 | */ |
e868171a | 1460 | static inline int is_global_init(struct task_struct *tsk) |
b461cc03 | 1461 | { |
570f5241 | 1462 | return task_tgid_nr(tsk) == 1; |
b461cc03 | 1463 | } |
b460cbc5 | 1464 | |
9ec52099 CLG |
1465 | extern struct pid *cad_pid; |
1466 | ||
1da177e4 LT |
1467 | /* |
1468 | * Per process flags | |
1469 | */ | |
5eca1c10 IM |
1470 | #define PF_IDLE 0x00000002 /* I am an IDLE thread */ |
1471 | #define PF_EXITING 0x00000004 /* Getting shut down */ | |
1472 | #define PF_EXITPIDONE 0x00000008 /* PI exit done on shut down */ | |
1473 | #define PF_VCPU 0x00000010 /* I'm a virtual CPU */ | |
1474 | #define PF_WQ_WORKER 0x00000020 /* I'm a workqueue worker */ | |
1475 | #define PF_FORKNOEXEC 0x00000040 /* Forked but didn't exec */ | |
1476 | #define PF_MCE_PROCESS 0x00000080 /* Process policy on mce errors */ | |
1477 | #define PF_SUPERPRIV 0x00000100 /* Used super-user privileges */ | |
1478 | #define PF_DUMPCORE 0x00000200 /* Dumped core */ | |
1479 | #define PF_SIGNALED 0x00000400 /* Killed by a signal */ | |
1480 | #define PF_MEMALLOC 0x00000800 /* Allocating memory */ | |
1481 | #define PF_NPROC_EXCEEDED 0x00001000 /* set_user() noticed that RLIMIT_NPROC was exceeded */ | |
1482 | #define PF_USED_MATH 0x00002000 /* If unset the fpu must be initialized before use */ | |
1483 | #define PF_USED_ASYNC 0x00004000 /* Used async_schedule*(), used by module init */ | |
1484 | #define PF_NOFREEZE 0x00008000 /* This thread should not be frozen */ | |
1485 | #define PF_FROZEN 0x00010000 /* Frozen for system suspend */ | |
7dea19f9 MH |
1486 | #define PF_KSWAPD 0x00020000 /* I am kswapd */ |
1487 | #define PF_MEMALLOC_NOFS 0x00040000 /* All allocation requests will inherit GFP_NOFS */ | |
1488 | #define PF_MEMALLOC_NOIO 0x00080000 /* All allocation requests will inherit GFP_NOIO */ | |
5eca1c10 IM |
1489 | #define PF_LESS_THROTTLE 0x00100000 /* Throttle me less: I clean memory */ |
1490 | #define PF_KTHREAD 0x00200000 /* I am a kernel thread */ | |
1491 | #define PF_RANDOMIZE 0x00400000 /* Randomize virtual address space */ | |
1492 | #define PF_SWAPWRITE 0x00800000 /* Allowed to write to swap */ | |
7cafcfd8 | 1493 | #define PF_MEMSTALL 0x01000000 /* Stalled due to lack of memory */ |
5eca1c10 IM |
1494 | #define PF_NO_SETAFFINITY 0x04000000 /* Userland is not allowed to meddle with cpus_allowed */ |
1495 | #define PF_MCE_EARLY 0x08000000 /* Early kill for mce process policy */ | |
1496 | #define PF_MUTEX_TESTER 0x20000000 /* Thread belongs to the rt mutex tester */ | |
1497 | #define PF_FREEZER_SKIP 0x40000000 /* Freezer should not count it as freezable */ | |
1498 | #define PF_SUSPEND_TASK 0x80000000 /* This thread called freeze_processes() and should not be frozen */ | |
1da177e4 LT |
1499 | |
1500 | /* | |
1501 | * Only the _current_ task can read/write to tsk->flags, but other | |
1502 | * tasks can access tsk->flags in readonly mode for example | |
1503 | * with tsk_used_math (like during threaded core dumping). | |
1504 | * There is however an exception to this rule during ptrace | |
1505 | * or during fork: the ptracer task is allowed to write to the | |
1506 | * child->flags of its traced child (same goes for fork, the parent | |
1507 | * can write to the child->flags), because we're guaranteed the | |
1508 | * child is not running and in turn not changing child->flags | |
1509 | * at the same time the parent does it. | |
1510 | */ | |
5eca1c10 IM |
1511 | #define clear_stopped_child_used_math(child) do { (child)->flags &= ~PF_USED_MATH; } while (0) |
1512 | #define set_stopped_child_used_math(child) do { (child)->flags |= PF_USED_MATH; } while (0) | |
1513 | #define clear_used_math() clear_stopped_child_used_math(current) | |
1514 | #define set_used_math() set_stopped_child_used_math(current) | |
1515 | ||
1da177e4 LT |
1516 | #define conditional_stopped_child_used_math(condition, child) \ |
1517 | do { (child)->flags &= ~PF_USED_MATH, (child)->flags |= (condition) ? PF_USED_MATH : 0; } while (0) | |
5eca1c10 IM |
1518 | |
1519 | #define conditional_used_math(condition) conditional_stopped_child_used_math(condition, current) | |
1520 | ||
1da177e4 LT |
1521 | #define copy_to_stopped_child_used_math(child) \ |
1522 | do { (child)->flags &= ~PF_USED_MATH, (child)->flags |= current->flags & PF_USED_MATH; } while (0) | |
5eca1c10 | 1523 | |
1da177e4 | 1524 | /* NOTE: this will return 0 or PF_USED_MATH, it will never return 1 */ |
5eca1c10 IM |
1525 | #define tsk_used_math(p) ((p)->flags & PF_USED_MATH) |
1526 | #define used_math() tsk_used_math(current) | |
1da177e4 | 1527 | |
62ec05dd TG |
1528 | static inline bool is_percpu_thread(void) |
1529 | { | |
1530 | #ifdef CONFIG_SMP | |
1531 | return (current->flags & PF_NO_SETAFFINITY) && | |
1532 | (current->nr_cpus_allowed == 1); | |
1533 | #else | |
1534 | return true; | |
1535 | #endif | |
1536 | } | |
1537 | ||
1d4457f9 | 1538 | /* Per-process atomic flags. */ |
5eca1c10 IM |
1539 | #define PFA_NO_NEW_PRIVS 0 /* May not gain new privileges. */ |
1540 | #define PFA_SPREAD_PAGE 1 /* Spread page cache over cpuset */ | |
1541 | #define PFA_SPREAD_SLAB 2 /* Spread some slab caches over cpuset */ | |
20d036a2 TG |
1542 | #define PFA_SPEC_SSB_DISABLE 3 /* Speculative Store Bypass disabled */ |
1543 | #define PFA_SPEC_SSB_FORCE_DISABLE 4 /* Speculative Store Bypass force disabled*/ | |
6a847a60 TG |
1544 | #define PFA_SPEC_IB_DISABLE 5 /* Indirect branch speculation restricted */ |
1545 | #define PFA_SPEC_IB_FORCE_DISABLE 6 /* Indirect branch speculation permanently restricted */ | |
880c81ad | 1546 | #define PFA_LMK_WAITING 7 /* Lowmemorykiller is waiting */ |
1d4457f9 | 1547 | |
e0e5070b ZL |
1548 | #define TASK_PFA_TEST(name, func) \ |
1549 | static inline bool task_##func(struct task_struct *p) \ | |
1550 | { return test_bit(PFA_##name, &p->atomic_flags); } | |
5eca1c10 | 1551 | |
e0e5070b ZL |
1552 | #define TASK_PFA_SET(name, func) \ |
1553 | static inline void task_set_##func(struct task_struct *p) \ | |
1554 | { set_bit(PFA_##name, &p->atomic_flags); } | |
5eca1c10 | 1555 | |
e0e5070b ZL |
1556 | #define TASK_PFA_CLEAR(name, func) \ |
1557 | static inline void task_clear_##func(struct task_struct *p) \ | |
1558 | { clear_bit(PFA_##name, &p->atomic_flags); } | |
1559 | ||
1560 | TASK_PFA_TEST(NO_NEW_PRIVS, no_new_privs) | |
1561 | TASK_PFA_SET(NO_NEW_PRIVS, no_new_privs) | |
1d4457f9 | 1562 | |
2ad654bc ZL |
1563 | TASK_PFA_TEST(SPREAD_PAGE, spread_page) |
1564 | TASK_PFA_SET(SPREAD_PAGE, spread_page) | |
1565 | TASK_PFA_CLEAR(SPREAD_PAGE, spread_page) | |
1566 | ||
1567 | TASK_PFA_TEST(SPREAD_SLAB, spread_slab) | |
1568 | TASK_PFA_SET(SPREAD_SLAB, spread_slab) | |
1569 | TASK_PFA_CLEAR(SPREAD_SLAB, spread_slab) | |
1d4457f9 | 1570 | |
20d036a2 TG |
1571 | TASK_PFA_TEST(SPEC_SSB_DISABLE, spec_ssb_disable) |
1572 | TASK_PFA_SET(SPEC_SSB_DISABLE, spec_ssb_disable) | |
1573 | TASK_PFA_CLEAR(SPEC_SSB_DISABLE, spec_ssb_disable) | |
1574 | ||
1575 | TASK_PFA_TEST(SPEC_SSB_FORCE_DISABLE, spec_ssb_force_disable) | |
1576 | TASK_PFA_SET(SPEC_SSB_FORCE_DISABLE, spec_ssb_force_disable) | |
1577 | ||
6a847a60 TG |
1578 | TASK_PFA_TEST(SPEC_IB_DISABLE, spec_ib_disable) |
1579 | TASK_PFA_SET(SPEC_IB_DISABLE, spec_ib_disable) | |
1580 | TASK_PFA_CLEAR(SPEC_IB_DISABLE, spec_ib_disable) | |
1581 | ||
1582 | TASK_PFA_TEST(SPEC_IB_FORCE_DISABLE, spec_ib_force_disable) | |
1583 | TASK_PFA_SET(SPEC_IB_FORCE_DISABLE, spec_ib_force_disable) | |
8cae9ff2 | 1584 | |
880c81ad YN |
1585 | TASK_PFA_TEST(LMK_WAITING, lmk_waiting) |
1586 | TASK_PFA_SET(LMK_WAITING, lmk_waiting) | |
1587 | ||
5eca1c10 | 1588 | static inline void |
717a94b5 | 1589 | current_restore_flags(unsigned long orig_flags, unsigned long flags) |
907aed48 | 1590 | { |
717a94b5 N |
1591 | current->flags &= ~flags; |
1592 | current->flags |= orig_flags & flags; | |
907aed48 MG |
1593 | } |
1594 | ||
5eca1c10 IM |
1595 | extern int cpuset_cpumask_can_shrink(const struct cpumask *cur, const struct cpumask *trial); |
1596 | extern int task_can_attach(struct task_struct *p, const struct cpumask *cs_cpus_allowed); | |
1da177e4 | 1597 | #ifdef CONFIG_SMP |
5eca1c10 IM |
1598 | extern void do_set_cpus_allowed(struct task_struct *p, const struct cpumask *new_mask); |
1599 | extern int set_cpus_allowed_ptr(struct task_struct *p, const struct cpumask *new_mask); | |
1da177e4 | 1600 | #else |
5eca1c10 | 1601 | static inline void do_set_cpus_allowed(struct task_struct *p, const struct cpumask *new_mask) |
1e1b6c51 KM |
1602 | { |
1603 | } | |
5eca1c10 | 1604 | static inline int set_cpus_allowed_ptr(struct task_struct *p, const struct cpumask *new_mask) |
1da177e4 | 1605 | { |
96f874e2 | 1606 | if (!cpumask_test_cpu(0, new_mask)) |
1da177e4 LT |
1607 | return -EINVAL; |
1608 | return 0; | |
1609 | } | |
1610 | #endif | |
e0ad9556 | 1611 | |
6d0d2878 CB |
1612 | #ifndef cpu_relax_yield |
1613 | #define cpu_relax_yield() cpu_relax() | |
1614 | #endif | |
1615 | ||
fa93384f | 1616 | extern int yield_to(struct task_struct *p, bool preempt); |
36c8b586 IM |
1617 | extern void set_user_nice(struct task_struct *p, long nice); |
1618 | extern int task_prio(const struct task_struct *p); | |
5eca1c10 | 1619 | |
d0ea0268 DY |
1620 | /** |
1621 | * task_nice - return the nice value of a given task. | |
1622 | * @p: the task in question. | |
1623 | * | |
1624 | * Return: The nice value [ -20 ... 0 ... 19 ]. | |
1625 | */ | |
1626 | static inline int task_nice(const struct task_struct *p) | |
1627 | { | |
1628 | return PRIO_TO_NICE((p)->static_prio); | |
1629 | } | |
5eca1c10 | 1630 | |
36c8b586 IM |
1631 | extern int can_nice(const struct task_struct *p, const int nice); |
1632 | extern int task_curr(const struct task_struct *p); | |
1da177e4 | 1633 | extern int idle_cpu(int cpu); |
5eca1c10 IM |
1634 | extern int sched_setscheduler(struct task_struct *, int, const struct sched_param *); |
1635 | extern int sched_setscheduler_nocheck(struct task_struct *, int, const struct sched_param *); | |
1636 | extern int sched_setattr(struct task_struct *, const struct sched_attr *); | |
36c8b586 | 1637 | extern struct task_struct *idle_task(int cpu); |
5eca1c10 | 1638 | |
c4f30608 PM |
1639 | /** |
1640 | * is_idle_task - is the specified task an idle task? | |
fa757281 | 1641 | * @p: the task in question. |
e69f6186 YB |
1642 | * |
1643 | * Return: 1 if @p is an idle task. 0 otherwise. | |
c4f30608 | 1644 | */ |
7061ca3b | 1645 | static inline bool is_idle_task(const struct task_struct *p) |
c4f30608 | 1646 | { |
c1de45ca | 1647 | return !!(p->flags & PF_IDLE); |
c4f30608 | 1648 | } |
5eca1c10 | 1649 | |
36c8b586 | 1650 | extern struct task_struct *curr_task(int cpu); |
a458ae2e | 1651 | extern void ia64_set_curr_task(int cpu, struct task_struct *p); |
1da177e4 LT |
1652 | |
1653 | void yield(void); | |
1654 | ||
1da177e4 | 1655 | union thread_union { |
c65eacbe | 1656 | #ifndef CONFIG_THREAD_INFO_IN_TASK |
1da177e4 | 1657 | struct thread_info thread_info; |
c65eacbe | 1658 | #endif |
1da177e4 LT |
1659 | unsigned long stack[THREAD_SIZE/sizeof(long)]; |
1660 | }; | |
1661 | ||
f3ac6067 IM |
1662 | #ifdef CONFIG_THREAD_INFO_IN_TASK |
1663 | static inline struct thread_info *task_thread_info(struct task_struct *task) | |
1664 | { | |
1665 | return &task->thread_info; | |
1666 | } | |
1667 | #elif !defined(__HAVE_THREAD_FUNCTIONS) | |
1668 | # define task_thread_info(task) ((struct thread_info *)(task)->stack) | |
1669 | #endif | |
1670 | ||
198fe21b PE |
1671 | /* |
1672 | * find a task by one of its numerical ids | |
1673 | * | |
198fe21b PE |
1674 | * find_task_by_pid_ns(): |
1675 | * finds a task by its pid in the specified namespace | |
228ebcbe PE |
1676 | * find_task_by_vpid(): |
1677 | * finds a task by its virtual pid | |
198fe21b | 1678 | * |
e49859e7 | 1679 | * see also find_vpid() etc in include/linux/pid.h |
198fe21b PE |
1680 | */ |
1681 | ||
228ebcbe | 1682 | extern struct task_struct *find_task_by_vpid(pid_t nr); |
5eca1c10 | 1683 | extern struct task_struct *find_task_by_pid_ns(pid_t nr, struct pid_namespace *ns); |
198fe21b | 1684 | |
b3c97528 HH |
1685 | extern int wake_up_state(struct task_struct *tsk, unsigned int state); |
1686 | extern int wake_up_process(struct task_struct *tsk); | |
3e51e3ed | 1687 | extern void wake_up_new_task(struct task_struct *tsk); |
5eca1c10 | 1688 | |
1da177e4 | 1689 | #ifdef CONFIG_SMP |
5eca1c10 | 1690 | extern void kick_process(struct task_struct *tsk); |
1da177e4 | 1691 | #else |
5eca1c10 | 1692 | static inline void kick_process(struct task_struct *tsk) { } |
1da177e4 | 1693 | #endif |
1da177e4 | 1694 | |
82b89778 | 1695 | extern void __set_task_comm(struct task_struct *tsk, const char *from, bool exec); |
5eca1c10 | 1696 | |
82b89778 AH |
1697 | static inline void set_task_comm(struct task_struct *tsk, const char *from) |
1698 | { | |
1699 | __set_task_comm(tsk, from, false); | |
1700 | } | |
5eca1c10 | 1701 | |
7edaa9af AB |
1702 | extern char *__get_task_comm(char *to, size_t len, struct task_struct *tsk); |
1703 | #define get_task_comm(buf, tsk) ({ \ | |
1704 | BUILD_BUG_ON(sizeof(buf) != TASK_COMM_LEN); \ | |
1705 | __get_task_comm(buf, sizeof(buf), tsk); \ | |
1706 | }) | |
1da177e4 LT |
1707 | |
1708 | #ifdef CONFIG_SMP | |
317f3941 | 1709 | void scheduler_ipi(void); |
85ba2d86 | 1710 | extern unsigned long wait_task_inactive(struct task_struct *, long match_state); |
1da177e4 | 1711 | #else |
184748cc | 1712 | static inline void scheduler_ipi(void) { } |
5eca1c10 | 1713 | static inline unsigned long wait_task_inactive(struct task_struct *p, long match_state) |
85ba2d86 RM |
1714 | { |
1715 | return 1; | |
1716 | } | |
1da177e4 LT |
1717 | #endif |
1718 | ||
5eca1c10 IM |
1719 | /* |
1720 | * Set thread flags in other task's structures. | |
1721 | * See asm/thread_info.h for TIF_xxxx flags available: | |
1da177e4 LT |
1722 | */ |
1723 | static inline void set_tsk_thread_flag(struct task_struct *tsk, int flag) | |
1724 | { | |
a1261f54 | 1725 | set_ti_thread_flag(task_thread_info(tsk), flag); |
1da177e4 LT |
1726 | } |
1727 | ||
1728 | static inline void clear_tsk_thread_flag(struct task_struct *tsk, int flag) | |
1729 | { | |
a1261f54 | 1730 | clear_ti_thread_flag(task_thread_info(tsk), flag); |
1da177e4 LT |
1731 | } |
1732 | ||
1733 | static inline int test_and_set_tsk_thread_flag(struct task_struct *tsk, int flag) | |
1734 | { | |
a1261f54 | 1735 | return test_and_set_ti_thread_flag(task_thread_info(tsk), flag); |
1da177e4 LT |
1736 | } |
1737 | ||
1738 | static inline int test_and_clear_tsk_thread_flag(struct task_struct *tsk, int flag) | |
1739 | { | |
a1261f54 | 1740 | return test_and_clear_ti_thread_flag(task_thread_info(tsk), flag); |
1da177e4 LT |
1741 | } |
1742 | ||
1743 | static inline int test_tsk_thread_flag(struct task_struct *tsk, int flag) | |
1744 | { | |
a1261f54 | 1745 | return test_ti_thread_flag(task_thread_info(tsk), flag); |
1da177e4 LT |
1746 | } |
1747 | ||
1748 | static inline void set_tsk_need_resched(struct task_struct *tsk) | |
1749 | { | |
1750 | set_tsk_thread_flag(tsk,TIF_NEED_RESCHED); | |
1751 | } | |
1752 | ||
1753 | static inline void clear_tsk_need_resched(struct task_struct *tsk) | |
1754 | { | |
1755 | clear_tsk_thread_flag(tsk,TIF_NEED_RESCHED); | |
1756 | } | |
1757 | ||
8ae121ac GH |
1758 | static inline int test_tsk_need_resched(struct task_struct *tsk) |
1759 | { | |
1760 | return unlikely(test_tsk_thread_flag(tsk,TIF_NEED_RESCHED)); | |
1761 | } | |
1762 | ||
1da177e4 LT |
1763 | /* |
1764 | * cond_resched() and cond_resched_lock(): latency reduction via | |
1765 | * explicit rescheduling in places that are safe. The return | |
1766 | * value indicates whether a reschedule was done in fact. | |
1767 | * cond_resched_lock() will drop the spinlock before scheduling, | |
1768 | * cond_resched_softirq() will enable bhs before scheduling. | |
1769 | */ | |
35a773a0 | 1770 | #ifndef CONFIG_PREEMPT |
c3921ab7 | 1771 | extern int _cond_resched(void); |
35a773a0 PZ |
1772 | #else |
1773 | static inline int _cond_resched(void) { return 0; } | |
1774 | #endif | |
6f80bd98 | 1775 | |
613afbf8 | 1776 | #define cond_resched() ({ \ |
3427445a | 1777 | ___might_sleep(__FILE__, __LINE__, 0); \ |
613afbf8 FW |
1778 | _cond_resched(); \ |
1779 | }) | |
6f80bd98 | 1780 | |
613afbf8 FW |
1781 | extern int __cond_resched_lock(spinlock_t *lock); |
1782 | ||
1783 | #define cond_resched_lock(lock) ({ \ | |
3427445a | 1784 | ___might_sleep(__FILE__, __LINE__, PREEMPT_LOCK_OFFSET);\ |
613afbf8 FW |
1785 | __cond_resched_lock(lock); \ |
1786 | }) | |
1787 | ||
1788 | extern int __cond_resched_softirq(void); | |
1789 | ||
75e1056f | 1790 | #define cond_resched_softirq() ({ \ |
3427445a | 1791 | ___might_sleep(__FILE__, __LINE__, SOFTIRQ_DISABLE_OFFSET); \ |
75e1056f | 1792 | __cond_resched_softirq(); \ |
613afbf8 | 1793 | }) |
1da177e4 | 1794 | |
f6f3c437 SH |
1795 | static inline void cond_resched_rcu(void) |
1796 | { | |
1797 | #if defined(CONFIG_DEBUG_ATOMIC_SLEEP) || !defined(CONFIG_PREEMPT_RCU) | |
1798 | rcu_read_unlock(); | |
1799 | cond_resched(); | |
1800 | rcu_read_lock(); | |
1801 | #endif | |
1802 | } | |
1803 | ||
1da177e4 LT |
1804 | /* |
1805 | * Does a critical section need to be broken due to another | |
95c354fe NP |
1806 | * task waiting?: (technically does not depend on CONFIG_PREEMPT, |
1807 | * but a general need for low latency) | |
1da177e4 | 1808 | */ |
95c354fe | 1809 | static inline int spin_needbreak(spinlock_t *lock) |
1da177e4 | 1810 | { |
95c354fe NP |
1811 | #ifdef CONFIG_PREEMPT |
1812 | return spin_is_contended(lock); | |
1813 | #else | |
1da177e4 | 1814 | return 0; |
95c354fe | 1815 | #endif |
1da177e4 LT |
1816 | } |
1817 | ||
75f93fed PZ |
1818 | static __always_inline bool need_resched(void) |
1819 | { | |
1820 | return unlikely(tif_need_resched()); | |
1821 | } | |
1822 | ||
1da177e4 LT |
1823 | /* |
1824 | * Wrappers for p->thread_info->cpu access. No-op on UP. | |
1825 | */ | |
1826 | #ifdef CONFIG_SMP | |
1827 | ||
1828 | static inline unsigned int task_cpu(const struct task_struct *p) | |
1829 | { | |
c65eacbe AL |
1830 | #ifdef CONFIG_THREAD_INFO_IN_TASK |
1831 | return p->cpu; | |
1832 | #else | |
a1261f54 | 1833 | return task_thread_info(p)->cpu; |
c65eacbe | 1834 | #endif |
1da177e4 LT |
1835 | } |
1836 | ||
c65cc870 | 1837 | extern void set_task_cpu(struct task_struct *p, unsigned int cpu); |
1da177e4 LT |
1838 | |
1839 | #else | |
1840 | ||
1841 | static inline unsigned int task_cpu(const struct task_struct *p) | |
1842 | { | |
1843 | return 0; | |
1844 | } | |
1845 | ||
1846 | static inline void set_task_cpu(struct task_struct *p, unsigned int cpu) | |
1847 | { | |
1848 | } | |
1849 | ||
1850 | #endif /* CONFIG_SMP */ | |
1851 | ||
d9345c65 PX |
1852 | /* |
1853 | * In order to reduce various lock holder preemption latencies provide an | |
1854 | * interface to see if a vCPU is currently running or not. | |
1855 | * | |
1856 | * This allows us to terminate optimistic spin loops and block, analogous to | |
1857 | * the native optimistic spin heuristic of testing if the lock owner task is | |
1858 | * running or not. | |
1859 | */ | |
1860 | #ifndef vcpu_is_preempted | |
1861 | # define vcpu_is_preempted(cpu) false | |
1862 | #endif | |
1863 | ||
96f874e2 RR |
1864 | extern long sched_setaffinity(pid_t pid, const struct cpumask *new_mask); |
1865 | extern long sched_getaffinity(pid_t pid, struct cpumask *mask); | |
5c45bf27 | 1866 | |
82455257 DH |
1867 | #ifndef TASK_SIZE_OF |
1868 | #define TASK_SIZE_OF(tsk) TASK_SIZE | |
1869 | #endif | |
1870 | ||
1da177e4 | 1871 | #endif |