linux-kernel - [PATCH 01/13] sched/balancing: Rename run_rebalance_domains() => sched_balance

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Message-Id: <20240308111819.1101550-2-mingo@kernel.org>
Date: Fri,  8 Mar 2024 12:18:07 +0100
From: Ingo Molnar <mingo@...nel.org>
To: linux-kernel@...r.kernel.org
Cc: Dietmar Eggemann <dietmar.eggemann@....com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Shrikanth Hegde <sshegde@...ux.ibm.com>,
	Valentin Schneider <vschneid@...hat.com>,
	Vincent Guittot <vincent.guittot@...aro.org>
Subject: [PATCH 01/13] sched/balancing: Rename run_rebalance_domains() => sched_balance_softirq()

run_rebalance_domains() is a misnomer, as it doesn't only
run rebalance_domains(), but since the introduction of the
NOHZ code it also runs nohz_idle_balance().

Rename it to sched_balance_softirq(), reflecting its more
generic purpose and that it's a softirq handler.

Signed-off-by: Ingo Molnar <mingo@...nel.org>
Reviewed-by: Valentin Schneider <vschneid@...hat.com>
Cc: Dietmar Eggemann <dietmar.eggemann@....com>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Shrikanth Hegde <sshegde@...ux.ibm.com>
Cc: Vincent Guittot <vincent.guittot@...aro.org>
---
 Documentation/scheduler/sched-domains.rst                    | 2 +-
 Documentation/translations/zh_CN/scheduler/sched-domains.rst | 2 +-
 kernel/sched/fair.c                                          | 4 ++--
 3 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/Documentation/scheduler/sched-domains.rst b/Documentation/scheduler/sched-domains.rst
index e57ad28301bd..6577b068f921 100644
--- a/Documentation/scheduler/sched-domains.rst
+++ b/Documentation/scheduler/sched-domains.rst
@@ -34,7 +34,7 @@ out of balance are tasks moved between groups.
 In kernel/sched/core.c, trigger_load_balance() is run periodically on each CPU
 through scheduler_tick(). It raises a softirq after the next regularly scheduled
 rebalancing event for the current runqueue has arrived. The actual load
-balancing workhorse, run_rebalance_domains()->rebalance_domains(), is then run
+balancing workhorse, sched_balance_softirq()->rebalance_domains(), is then run
 in softirq context (SCHED_SOFTIRQ).
 
 The latter function takes two arguments: the runqueue of current CPU and whether
diff --git a/Documentation/translations/zh_CN/scheduler/sched-domains.rst b/Documentation/translations/zh_CN/scheduler/sched-domains.rst
index e814d4c01141..fbc326668e37 100644
--- a/Documentation/translations/zh_CN/scheduler/sched-domains.rst
+++ b/Documentation/translations/zh_CN/scheduler/sched-domains.rst
@@ -36,7 +36,7 @@ CPU共享。任意两个组的CPU掩码的交集不一定为空，如果是这
 
 在kernel/sched/core.c中，trigger_load_balance()在每个CPU上通过scheduler_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run_rebalance_domains()->rebalance_domains()完成，在软中断上下文中执行
+的工作由sched_balance_softirq()->rebalance_domains()完成，在软中断上下文中执行
 （SCHED_SOFTIRQ）。
 
 后一个函数有两个入参：当前CPU的运行队列、它在scheduler_tick()调用时是否空闲。函数会从
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 116a640534b9..953f39deb68e 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -12415,7 +12415,7 @@ static int newidle_balance(struct rq *this_rq, struct rq_flags *rf)
  * - indirectly from a remote scheduler_tick() for NOHZ idle balancing
  *   through the SMP cross-call nohz_csd_func()
  */
-static __latent_entropy void run_rebalance_domains(struct softirq_action *h)
+static __latent_entropy void sched_balance_softirq(struct softirq_action *h)
 {
 	struct rq *this_rq = this_rq();
 	enum cpu_idle_type idle = this_rq->idle_balance;
@@ -13216,7 +13216,7 @@ __init void init_sched_fair_class(void)
 #endif
 	}
 
-	open_softirq(SCHED_SOFTIRQ, run_rebalance_domains);
+	open_softirq(SCHED_SOFTIRQ, sched_balance_softirq);
 
 #ifdef CONFIG_NO_HZ_COMMON
 	nohz.next_balance = jiffies;
-- 
2.40.1