void send_sigbudget(struct task_struct* t)
{
if (!bt_flag_test_and_set(t, BTF_SIG_BUDGET_SENT)) {
/* signal has not yet been sent and we are responsible for sending
* since we just set the sent-bit when it was previously 0. */
TRACE_TASK(t, "SIG_BUDGET being sent!\n");
send_sig(SIG_BUDGET, t, 1); /* '1' denotes signal sent from kernel */
}
}
static enum hrtimer_restart psnedf_simple_on_exhausted(struct task_struct *t, int in_schedule)
{
/* Assumption: t is scheduled on the CPU executing this callback */
if (budget_signalled(t) && !bt_flag_is_set(t, BTF_SIG_BUDGET_SENT)) {
/* signal exhaustion */
send_sigbudget(t); /* will set BTF_SIG_BUDGET_SENT */
}
if (budget_enforced(t) && !bt_flag_test_and_set(t, BTF_BUDGET_EXHAUSTED)) {
if (!is_np(t)) {
/* np tasks will be preempted when they become
* preemptable again
*/
litmus_reschedule_local();
TRACE("%d is preemptable => FORCE_RESCHED\n", t->pid);
} else if (is_user_np(t)) {
TRACE("%d is non-preemptable, preemption delayed.\n", t->pid);
request_exit_np(t);
}
}
return HRTIMER_NORESTART;
}
