1 files changed, 14 insertions, 6 deletions

diff --git a/kernel/posix-cpu-timers.c b/kernel/posix-cpu-timers.c
index 7a51a5597c33..d30b304a3384 100644
--- a/kernel/posix-cpu-timers.c
+++ b/kernel/posix-cpu-timers.c
@@ -961,14 +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;
                 }
@@ -977,12 +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;
                 }
@@ -991,12 +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;
                 }
@@ -1013,6 +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;
@@ -1045,12 +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;
                 }
@@ -1059,12 +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;
                 }
@@ -1073,12 +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;
                 }