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-rw-r--r--kernel/posix-cpu-timers.c29
1 files changed, 29 insertions, 0 deletions
diff --git a/kernel/posix-cpu-timers.c b/kernel/posix-cpu-timers.c
index 68c96376e84..2c076b36c4f 100644
--- a/kernel/posix-cpu-timers.c
+++ b/kernel/posix-cpu-timers.c
@@ -967,6 +967,7 @@ static void check_thread_timers(struct task_struct *tsk,
{
int maxfire;
struct list_head *timers = tsk->cpu_timers;
+ struct signal_struct *const sig = tsk->signal;
maxfire = 20;
tsk->it_prof_expires = cputime_zero;
@@ -1011,6 +1012,34 @@ static void check_thread_timers(struct task_struct *tsk,
t->firing = 1;
list_move_tail(&t->entry, firing);
}
+
+ /*
+ * Check for the special case thread timers.
+ */
+ if (sig->rlim[RLIMIT_RTTIME].rlim_cur != RLIM_INFINITY) {
+ unsigned long hard = sig->rlim[RLIMIT_RTTIME].rlim_max;
+ unsigned long *soft = &sig->rlim[RLIMIT_RTTIME].rlim_cur;
+
+ if (tsk->rt.timeout > DIV_ROUND_UP(hard, USEC_PER_SEC/HZ)) {
+ /*
+ * At the hard limit, we just die.
+ * No need to calculate anything else now.
+ */
+ __group_send_sig_info(SIGKILL, SEND_SIG_PRIV, tsk);
+ return;
+ }
+ if (tsk->rt.timeout > DIV_ROUND_UP(*soft, USEC_PER_SEC/HZ)) {
+ /*
+ * At the soft limit, send a SIGXCPU every second.
+ */
+ if (sig->rlim[RLIMIT_RTTIME].rlim_cur
+ < sig->rlim[RLIMIT_RTTIME].rlim_max) {
+ sig->rlim[RLIMIT_RTTIME].rlim_cur +=
+ USEC_PER_SEC;
+ }
+ __group_send_sig_info(SIGXCPU, SEND_SIG_PRIV, tsk);
+ }
+ }
}
/*