kernel/time/posix-cpu-timers.c

24 void posix_cputimers_group_init(struct posix_cputimers *pct, u64 cpu_limit)
26 	posix_cputimers_init(pct);
28 		pct->bases[CPUCLOCK_PROF].nextevt = cpu_limit * NSEC_PER_SEC;
29 		pct->timers_active = true;
152 static inline bool expiry_cache_is_inactive(const struct posix_cputimers *pct)
154 	return !(~pct->bases[CPUCLOCK_PROF].nextevt |
155 		 ~pct->bases[CPUCLOCK_VIRT].nextevt |
156 		 ~pct->bases[CPUCLOCK_SCHED].nextevt);
276 	struct posix_cputimers *pct = &tsk->signal->posix_cputimers;
278 	WARN_ON_ONCE(!pct->timers_active);
298 	struct posix_cputimers *pct = &tsk->signal->posix_cputimers;
303 	if (!READ_ONCE(pct->timers_active)) {
321 		WRITE_ONCE(pct->timers_active, true);
343 	struct posix_cputimers *pct = &p->signal->posix_cputimers;
346 	if (!READ_ONCE(pct->timers_active)) {
531 static void cleanup_timers(struct posix_cputimers *pct)
533 	cleanup_timerqueue(&pct->bases[CPUCLOCK_PROF].tqhead);
534 	cleanup_timerqueue(&pct->bases[CPUCLOCK_VIRT].tqhead);
535 	cleanup_timerqueue(&pct->bases[CPUCLOCK_SCHED].tqhead);
858 static void collect_posix_cputimers(struct posix_cputimers *pct, u64 *samples,
861 	struct posix_cputimer_base *base = pct->bases;
900 	struct posix_cputimers *pct = &tsk->posix_cputimers;
907 	if (expiry_cache_is_inactive(pct))
911 	collect_posix_cputimers(pct, samples, firing);
934 	if (expiry_cache_is_inactive(pct))
940 	struct posix_cputimers *pct = &sig->posix_cputimers;
943 	WRITE_ONCE(pct->timers_active, false);
978 	struct posix_cputimers *pct = &sig->posix_cputimers;
987 	if (!READ_ONCE(pct->timers_active) || pct->expiry_active)
994 	pct->expiry_active = true;
1001 	collect_posix_cputimers(pct, samples, firing);
1007 			 &pct->bases[CPUCLOCK_PROF].nextevt,
1010 			 &pct->bases[CPUCLOCK_VIRT].nextevt,
1033 		if (softns < pct->bases[CPUCLOCK_PROF].nextevt)
1034 			pct->bases[CPUCLOCK_PROF].nextevt = softns;
1037 	if (expiry_cache_is_inactive(pct))
1040 	pct->expiry_active = false;
1088  * @pct:	Pointer to a posix_cputimers container
1091  * member of @pct->bases[CLK].nextevt. False otherwise
1094 task_cputimers_expired(const u64 *samples, struct posix_cputimers *pct)
1099 		if (samples[i] >= pct->bases[i].nextevt)
1117 	struct posix_cputimers *pct = &tsk->posix_cputimers;
1120 	if (!expiry_cache_is_inactive(pct)) {
1124 		if (task_cputimers_expired(samples, pct))
1129 	pct = &sig->posix_cputimers;
1145 	if (READ_ONCE(pct->timers_active) && !READ_ONCE(pct->expiry_active)) {
1151 		if (task_cputimers_expired(samples, pct))