linux-kernel - Re: [PATCH 09/13] sched/balancing: Rename update_blocked_averages() => sched_balance_update_blocked

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Message-ID: <ZfAwNufbiyt/5biu@gmail.com>
Date: Tue, 12 Mar 2024 11:36:38 +0100
From: Ingo Molnar <mingo@...nel.org>
To: Honglei Wang <jameshongleiwang@....com>
Cc: linux-kernel@...r.kernel.org,
	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: Re: [PATCH 09/13] sched/balancing: Rename update_blocked_averages()
 => sched_balance_update_blocked_averages()


* Honglei Wang <jameshongleiwang@....com> wrote:

> > --- a/kernel/sched/pelt.c
> > +++ b/kernel/sched/pelt.c
> > @@ -209,7 +209,7 @@ ___update_load_sum(u64 now, struct sched_avg *sa,
> >   	 * This means that weight will be 0 but not running for a sched_entity
> >   	 * but also for a cfs_rq if the latter becomes idle. As an example,
> >   	 * this happens during idle_balance() which calls
> 
> Could we also fix this ghost idle_balance() in this serial (maybe in patch
> 10)?

Good point - I've added the patch below.

Thanks,

	Ingo

===================>
From: Ingo Molnar <mingo@...nel.org>
Date: Tue, 12 Mar 2024 11:33:50 +0100
Subject: [PATCH] sched/balancing: Fix a couple of outdated function names in comments

The 'idle_balance()' function hasn't existed for years, and there's no
load_balance_newidle() either - both are sched_balance_newidle() today.

Reported-by: Honglei Wang <jameshongleiwang@....com>
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 kernel/sched/fair.c | 2 +-
 kernel/sched/pelt.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 54177ff96e4b..c35452109c76 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -6866,7 +6866,7 @@ static void dequeue_task_fair(struct rq *rq, struct task_struct *p, int flags)
 
 #ifdef CONFIG_SMP
 
-/* Working cpumask for: sched_balance_rq, load_balance_newidle. */
+/* Working cpumask for: sched_balance_rq(), sched_balance_newidle(). */
 static DEFINE_PER_CPU(cpumask_var_t, load_balance_mask);
 static DEFINE_PER_CPU(cpumask_var_t, select_rq_mask);
 static DEFINE_PER_CPU(cpumask_var_t, should_we_balance_tmpmask);
diff --git a/kernel/sched/pelt.c b/kernel/sched/pelt.c
index f80955ecdce6..3a96da25b67c 100644
--- a/kernel/sched/pelt.c
+++ b/kernel/sched/pelt.c
@@ -208,7 +208,7 @@ ___update_load_sum(u64 now, struct sched_avg *sa,
 	 * se has been already dequeued but cfs_rq->curr still points to it.
 	 * This means that weight will be 0 but not running for a sched_entity
 	 * but also for a cfs_rq if the latter becomes idle. As an example,
-	 * this happens during idle_balance() which calls
+	 * this happens during sched_balance_newidle() which calls
 	 * sched_balance_update_blocked_averages().
 	 *
 	 * Also see the comment in accumulate_sum().