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-rw-r--r--include/linux/sched.h32
1 files changed, 29 insertions, 3 deletions
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 2b69fc650201..9c4ca7433d9d 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -421,7 +421,8 @@ struct sched_dl_entity {
u64 dl_runtime; /* Maximum runtime for each instance */
u64 dl_deadline; /* Relative deadline of each instance */
u64 dl_period; /* Separation of two instances (period) */
- u64 dl_bw; /* dl_runtime / dl_deadline */
+ u64 dl_bw; /* dl_runtime / dl_period */
+ u64 dl_density; /* dl_runtime / dl_deadline */
/*
* Actual scheduling parameters. Initialized with the values above,
@@ -445,16 +446,33 @@ struct sched_dl_entity {
*
* @dl_yielded tells if task gave up the CPU before consuming
* all its available runtime during the last job.
+ *
+ * @dl_non_contending tells if the task is inactive while still
+ * contributing to the active utilization. In other words, it
+ * indicates if the inactive timer has been armed and its handler
+ * has not been executed yet. This flag is useful to avoid race
+ * conditions between the inactive timer handler and the wakeup
+ * code.
*/
int dl_throttled;
int dl_boosted;
int dl_yielded;
+ int dl_non_contending;
/*
* Bandwidth enforcement timer. Each -deadline task has its
* own bandwidth to be enforced, thus we need one timer per task.
*/
struct hrtimer dl_timer;
+
+ /*
+ * Inactive timer, responsible for decreasing the active utilization
+ * at the "0-lag time". When a -deadline task blocks, it contributes
+ * to GRUB's active utilization until the "0-lag time", hence a
+ * timer is needed to decrease the active utilization at the correct
+ * time.
+ */
+ struct hrtimer inactive_timer;
};
union rcu_special {
@@ -1096,8 +1114,6 @@ static inline struct pid *task_session(struct task_struct *task)
* current.
* task_xid_nr_ns() : id seen from the ns specified;
*
- * set_task_vxid() : assigns a virtual id to a task;
- *
* see also pid_nr() etc in include/linux/pid.h
*/
pid_t __task_pid_nr_ns(struct task_struct *task, enum pid_type type, struct pid_namespace *ns);
@@ -1265,6 +1281,16 @@ extern struct pid *cad_pid;
#define tsk_used_math(p) ((p)->flags & PF_USED_MATH)
#define used_math() tsk_used_math(current)
+static inline bool is_percpu_thread(void)
+{
+#ifdef CONFIG_SMP
+ return (current->flags & PF_NO_SETAFFINITY) &&
+ (current->nr_cpus_allowed == 1);
+#else
+ return true;
+#endif
+}
+
/* Per-process atomic flags. */
#define PFA_NO_NEW_PRIVS 0 /* May not gain new privileges. */
#define PFA_SPREAD_PAGE 1 /* Spread page cache over cpuset */