diff options
Diffstat (limited to 'kernel/posix-cpu-timers.c')
| -rw-r--r-- | kernel/posix-cpu-timers.c | 23 |
1 files changed, 17 insertions, 6 deletions
diff --git a/kernel/posix-cpu-timers.c b/kernel/posix-cpu-timers.c index ad85d3f0dcc4..d30b304a3384 100644 --- a/kernel/posix-cpu-timers.c +++ b/kernel/posix-cpu-timers.c @@ -424,6 +424,7 @@ static void cleanup_timers(struct list_head *head, cputime_t ptime = cputime_add(utime, stime); list_for_each_entry_safe(timer, next, head, entry) { + put_task_struct(timer->task); timer->task = NULL; list_del_init(&timer->entry); if (cputime_lt(timer->expires.cpu, ptime)) { @@ -436,6 +437,7 @@ static void cleanup_timers(struct list_head *head, ++head; list_for_each_entry_safe(timer, next, head, entry) { + put_task_struct(timer->task); timer->task = NULL; list_del_init(&timer->entry); if (cputime_lt(timer->expires.cpu, utime)) { @@ -448,6 +450,7 @@ static void cleanup_timers(struct list_head *head, ++head; list_for_each_entry_safe(timer, next, head, entry) { + put_task_struct(timer->task); timer->task = NULL; list_del_init(&timer->entry); if (timer->expires.sched < sched_time) { @@ -958,14 +961,16 @@ void posix_cpu_timer_get(struct k_itimer *timer, struct itimerspec *itp) static void check_thread_timers(struct task_struct *tsk, struct list_head *firing) { + int maxfire; struct list_head *timers = tsk->cpu_timers; + maxfire = 20; tsk->it_prof_expires = cputime_zero; while (!list_empty(timers)) { struct cpu_timer_list *t = list_entry(timers->next, struct cpu_timer_list, entry); - if (cputime_lt(prof_ticks(tsk), t->expires.cpu)) { + if (!--maxfire || cputime_lt(prof_ticks(tsk), t->expires.cpu)) { tsk->it_prof_expires = t->expires.cpu; break; } @@ -974,12 +979,13 @@ static void check_thread_timers(struct task_struct *tsk, } ++timers; + maxfire = 20; tsk->it_virt_expires = cputime_zero; while (!list_empty(timers)) { struct cpu_timer_list *t = list_entry(timers->next, struct cpu_timer_list, entry); - if (cputime_lt(virt_ticks(tsk), t->expires.cpu)) { + if (!--maxfire || cputime_lt(virt_ticks(tsk), t->expires.cpu)) { tsk->it_virt_expires = t->expires.cpu; break; } @@ -988,12 +994,13 @@ static void check_thread_timers(struct task_struct *tsk, } ++timers; + maxfire = 20; tsk->it_sched_expires = 0; while (!list_empty(timers)) { struct cpu_timer_list *t = list_entry(timers->next, struct cpu_timer_list, entry); - if (tsk->sched_time < t->expires.sched) { + if (!--maxfire || tsk->sched_time < t->expires.sched) { tsk->it_sched_expires = t->expires.sched; break; } @@ -1010,6 +1017,7 @@ static void check_thread_timers(struct task_struct *tsk, static void check_process_timers(struct task_struct *tsk, struct list_head *firing) { + int maxfire; struct signal_struct *const sig = tsk->signal; cputime_t utime, stime, ptime, virt_expires, prof_expires; unsigned long long sched_time, sched_expires; @@ -1042,12 +1050,13 @@ static void check_process_timers(struct task_struct *tsk, } while (t != tsk); ptime = cputime_add(utime, stime); + maxfire = 20; prof_expires = cputime_zero; while (!list_empty(timers)) { struct cpu_timer_list *t = list_entry(timers->next, struct cpu_timer_list, entry); - if (cputime_lt(ptime, t->expires.cpu)) { + if (!--maxfire || cputime_lt(ptime, t->expires.cpu)) { prof_expires = t->expires.cpu; break; } @@ -1056,12 +1065,13 @@ static void check_process_timers(struct task_struct *tsk, } ++timers; + maxfire = 20; virt_expires = cputime_zero; while (!list_empty(timers)) { struct cpu_timer_list *t = list_entry(timers->next, struct cpu_timer_list, entry); - if (cputime_lt(utime, t->expires.cpu)) { + if (!--maxfire || cputime_lt(utime, t->expires.cpu)) { virt_expires = t->expires.cpu; break; } @@ -1070,12 +1080,13 @@ static void check_process_timers(struct task_struct *tsk, } ++timers; + maxfire = 20; sched_expires = 0; while (!list_empty(timers)) { struct cpu_timer_list *t = list_entry(timers->next, struct cpu_timer_list, entry); - if (sched_time < t->expires.sched) { + if (!--maxfire || sched_time < t->expires.sched) { sched_expires = t->expires.sched; break; } |