+
+static inline bool ttwu_queue_cond(int cpu, int wake_flags)
+{
+ /*
+ * If the CPU does not share cache, then queue the task on the
+ * remote rqs wakelist to avoid accessing remote data.
+ */
+ if (!cpus_share_cache(smp_processor_id(), cpu))
+ return true;
+
+ /*
+ * If the task is descheduling and the only running task on the
+ * CPU then use the wakelist to offload the task activation to
+ * the soon-to-be-idle CPU as the current CPU is likely busy.
+ * nr_running is checked to avoid unnecessary task stacking.
+ */
+ if ((wake_flags & WF_ON_RQ) && cpu_rq(cpu)->nr_running <= 1)
+ return true;
+
+ return false;
+}
+
+static bool ttwu_queue_wakelist(struct task_struct *p, int cpu, int wake_flags)
+{
+ if (sched_feat(TTWU_QUEUE) && ttwu_queue_cond(cpu, wake_flags)) {
+ sched_clock_cpu(cpu); /* Sync clocks across CPUs */
+ __ttwu_queue_wakelist(p, cpu, wake_flags);
+ return true;
+ }
+
+ return false;
+}