sched/balancing: Rename trigger_load_balance() => sched_balance_trigger()

Standardize scheduler load-balancing function names on the
sched_balance_() prefix.

Signed-off-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Shrikanth Hegde <sshegde@linux.ibm.com>
Link: https://lore.kernel.org/r/20240308111819.1101550-4-mingo@kernel.org

Documentation/scheduler/sched-domains.rst

@@ -31,7 +31,7 @@ is treated as one entity. The load of a group is defined as the sum of the
 load of each of its member CPUs, and only when the load of a group becomes
 out of balance are tasks moved between groups.
 
-In kernel/sched/core.c, trigger_load_balance() is run periodically on each CPU
+In kernel/sched/core.c, sched_balance_trigger() is run periodically on each CPU
 through sched_tick(). It raises a softirq after the next regularly scheduled
 rebalancing event for the current runqueue has arrived. The actual load
 balancing workhorse, sched_balance_softirq()->rebalance_domains(), is then run

Documentation/translations/zh_CN/scheduler/sched-domains.rst

@@ -34,7 +34,7 @@ CPU共享。任意两个组的CPU掩码的交集不一定为空，如果是这
 调度域中的负载均衡发生在调度组中。也就是说，每个组被视为一个实体。组的负载被定义为它
 管辖的每个CPU的负载之和。仅当组的负载不均衡后，任务才在组之间发生迁移。
 
-在kernel/sched/core.c中，trigger_load_balance()在每个CPU上通过sched_tick()
+在kernel/sched/core.c中，sched_balance_trigger()在每个CPU上通过sched_tick()
 周期执行。在当前运行队列下一个定期调度再平衡事件到达后，它引发一个软中断。负载均衡真正
 的工作由sched_balance_softirq()->rebalance_domains()完成，在软中断上下文中执行
 （SCHED_SOFTIRQ）。

kernel/sched/core.c

@@ -5700,7 +5700,7 @@ void sched_tick(void)
 
 #ifdef CONFIG_SMP
 	rq->idle_balance = idle_cpu(cpu);
-	trigger_load_balance(rq);
+	sched_balance_trigger(rq);
 #endif
 }
 

kernel/sched/fair.c

@@ -12438,7 +12438,7 @@ static __latent_entropy void sched_balance_softirq(struct softirq_action *h)
 /*
  * Trigger the SCHED_SOFTIRQ if it is time to do periodic load balancing.
  */
-void trigger_load_balance(struct rq *rq)
+void sched_balance_trigger(struct rq *rq)
 {
 	/*
 	 * Don't need to rebalance while attached to NULL domain or

kernel/sched/sched.h

@@ -2397,7 +2397,7 @@ extern struct task_struct *pick_next_task_idle(struct rq *rq);
 
 extern void update_group_capacity(struct sched_domain *sd, int cpu);
 
-extern void trigger_load_balance(struct rq *rq);
+extern void sched_balance_trigger(struct rq *rq);
 
 extern void set_cpus_allowed_common(struct task_struct *p, struct affinity_context *ctx);