Helper functions to get the effective policy and rt_priority from the
prio and policy values. This is useful in PI situations because these
fields are not updated in the task, only the sched_class is temporarily
modified.
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt (Red Hat) <rostedt@goodmis.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Julien Desfossez <jdesfossez@efficios.com>
{
return tsk->pi_blocked_on != NULL;
}
+extern int rt_mutex_get_effective_policy(int policy, int prio);
+extern int rt_mutex_get_effective_rt_prio(int prio);
#else
static inline int rt_mutex_getprio(struct task_struct *p)
{
{
return false;
}
+static inline int rt_mutex_get_effective_policy(int policy, int prio);
+{
+ return policy;
+}
+static inline int rt_mutex_get_effective_rt_prio(int prio)
+{
+ return task->rt_priority;
+}
#endif
extern void normalize_rt_tasks(void);
return newprio;
}
+/*
+ * Get the effective policy based on the current prio value.
+ */
+int rt_mutex_get_effective_policy(int policy, int prio)
+{
+ if (dl_prio(prio))
+ return SCHED_DEADLINE;
+
+ /* With RT, the default class is SCHED_FIFO. */
+ if (rt_prio(prio)) {
+ if (policy == SCHED_RR)
+ return SCHED_RR;
+ return SCHED_FIFO;
+ }
+
+ /* With fair, the default class is SCHED_NORMAL. */
+ switch (policy) {
+ case SCHED_NORMAL:
+ case SCHED_IDLE:
+ case SCHED_BATCH:
+ return policy;
+ }
+ return SCHED_NORMAL;
+}
+
+/*
+ * Get the effective rt priority based on the current prio value.
+ */
+int rt_mutex_get_effective_rt_prio(int prio)
+{
+ if (!rt_prio(prio))
+ return 0;
+
+ return MAX_RT_PRIO - 1 - prio;
+}
+
/*
* Adjust the priority of a task, after its pi_waiters got modified.
*