summaryrefslogtreecommitdiffstats
path: root/kernel/sched_rt.c
diff options
context:
space:
mode:
Diffstat (limited to 'kernel/sched_rt.c')
-rw-r--r--kernel/sched_rt.c30
1 files changed, 30 insertions, 0 deletions
diff --git a/kernel/sched_rt.c b/kernel/sched_rt.c
index 29963af782ae..f350f7b15158 100644
--- a/kernel/sched_rt.c
+++ b/kernel/sched_rt.c
@@ -116,6 +116,9 @@ static void enqueue_task_rt(struct rq *rq, struct task_struct *p, int wakeup)
inc_cpu_load(rq, p->se.load.weight);
inc_rt_tasks(p, rq);
+
+ if (wakeup)
+ p->rt.timeout = 0;
}
/*
@@ -834,11 +837,38 @@ static void prio_changed_rt(struct rq *rq, struct task_struct *p,
}
}
+static void watchdog(struct rq *rq, struct task_struct *p)
+{
+ unsigned long soft, hard;
+
+ if (!p->signal)
+ return;
+
+ soft = p->signal->rlim[RLIMIT_RTTIME].rlim_cur;
+ hard = p->signal->rlim[RLIMIT_RTTIME].rlim_max;
+
+ if (soft != RLIM_INFINITY) {
+ unsigned long next;
+
+ p->rt.timeout++;
+ next = DIV_ROUND_UP(min(soft, hard), USEC_PER_SEC/HZ);
+ if (next > p->rt.timeout) {
+ u64 next_time = p->se.sum_exec_runtime;
+
+ next_time += next * (NSEC_PER_SEC/HZ);
+ if (p->it_sched_expires > next_time)
+ p->it_sched_expires = next_time;
+ } else
+ p->it_sched_expires = p->se.sum_exec_runtime;
+ }
+}
static void task_tick_rt(struct rq *rq, struct task_struct *p)
{
update_curr_rt(rq);
+ watchdog(rq, p);
+
/*
* RR tasks need a special form of timeslice management.
* FIFO tasks have no timeslices.