Fix two typos:

 - There's no such thing as 'nohz_balancing_kick', the
   flag is named 'BALANCE' and is capitalized:  NOHZ_BALANCE_KICK.

 - Likewise there's no such thing as a 'pending nohz_balance_kick'
   either, the NOHZ_BALANCE_KICK flag is all upper-case.

Signed-off-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Valentin Schneider <vschneid@redhat.com>
Cc: Dietmar Eggemann <dietmar.eggemann@arm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Shrikanth Hegde <sshegde@linux.ibm.com>
Cc: Vincent Guittot <vincent.guittot@linaro.org>
---
 kernel/sched/fair.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 84d4791cf628..f3c03c6db3c8 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -12409,15 +12409,16 @@ static int newidle_balance(struct rq *this_rq, struct rq_flags *rf)
 }
 
 /*
- * run_rebalance_domains is triggered when needed from the scheduler tick.
- * Also triggered for nohz idle balancing (with nohz_balancing_kick set).
+ * This softirq may be triggered from the scheduler tick, or by
+ * any of the flags in NOHZ_KICK_MASK: NOHZ_BALANCE_KICK,
+ * NOHZ_STATS_KICK or NOHZ_NEXT_KICK.
  */
 static __latent_entropy void run_rebalance_domains(struct softirq_action *h)
 {
 	struct rq *this_rq = this_rq();
 	enum cpu_idle_type idle = this_rq->idle_balance;
 	/*
-	 * If this CPU has a pending nohz_balance_kick, then do the
+	 * If this CPU has a pending NOHZ_BALANCE_KICK, then do the
 	 * balancing on behalf of the other idle CPUs whose ticks are
 	 * stopped. Do nohz_idle_balance *before* rebalance_domains to
 	 * give the idle CPUs a chance to load balance. Else we may
-- 
2.40.1

On Fri, 8 Mar 2024 at 11:59, Ingo Molnar <mingo@kernel.org> wrote:
>
> Fix two typos:
>
>  - There's no such thing as 'nohz_balancing_kick', the
>    flag is named 'BALANCE' and is capitalized:  NOHZ_BALANCE_KICK.
>
>  - Likewise there's no such thing as a 'pending nohz_balance_kick'
>    either, the NOHZ_BALANCE_KICK flag is all upper-case.
>
> Signed-off-by: Ingo Molnar <mingo@kernel.org>
> Reviewed-by: Valentin Schneider <vschneid@redhat.com>
> Cc: Dietmar Eggemann <dietmar.eggemann@arm.com>
> Cc: Linus Torvalds <torvalds@linux-foundation.org>
> Cc: Peter Zijlstra <peterz@infradead.org>
> Cc: Shrikanth Hegde <sshegde@linux.ibm.com>
> Cc: Vincent Guittot <vincent.guittot@linaro.org>

Reviewed-by: Vincent Guittot <vincent.guittot@linaro.org>

> ---
>  kernel/sched/fair.c | 7 ++++---
>  1 file changed, 4 insertions(+), 3 deletions(-)
>
> diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
> index 84d4791cf628..f3c03c6db3c8 100644
> --- a/kernel/sched/fair.c
> +++ b/kernel/sched/fair.c
> @@ -12409,15 +12409,16 @@ static int newidle_balance(struct rq *this_rq, struct rq_flags *rf)
>  }
>
>  /*
> - * run_rebalance_domains is triggered when needed from the scheduler tick.
> - * Also triggered for nohz idle balancing (with nohz_balancing_kick set).
> + * This softirq may be triggered from the scheduler tick, or by
> + * any of the flags in NOHZ_KICK_MASK: NOHZ_BALANCE_KICK,
> + * NOHZ_STATS_KICK or NOHZ_NEXT_KICK.
>   */
>  static __latent_entropy void run_rebalance_domains(struct softirq_action *h)
>  {
>         struct rq *this_rq = this_rq();
>         enum cpu_idle_type idle = this_rq->idle_balance;
>         /*
> -        * If this CPU has a pending nohz_balance_kick, then do the
> +        * If this CPU has a pending NOHZ_BALANCE_KICK, then do the
>          * balancing on behalf of the other idle CPUs whose ticks are
>          * stopped. Do nohz_idle_balance *before* rebalance_domains to
>          * give the idle CPUs a chance to load balance. Else we may
> --
> 2.40.1
>

The following commit has been merged into the sched/core branch of tip:

Commit-ID:     3a5fe9305719c680ccf63216781a4d4068c8e3f3
Gitweb:        https://git.kernel.org/tip/3a5fe9305719c680ccf63216781a4d4068c8e3f3
Author:        Ingo Molnar <mingo@kernel.org>
AuthorDate:    Fri, 08 Mar 2024 11:58:58 +01:00
Committer:     Ingo Molnar <mingo@kernel.org>
CommitterDate: Tue, 12 Mar 2024 11:03:42 +01:00

sched/balancing: Fix comments (trying to) refer to NOHZ_BALANCE_KICK

Fix two typos:

 - There's no such thing as 'nohz_balancing_kick', the
   flag is named 'BALANCE' and is capitalized:  NOHZ_BALANCE_KICK.

 - Likewise there's no such thing as a 'pending nohz_balance_kick'
   either, the NOHZ_BALANCE_KICK flag is all upper-case.

Signed-off-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Valentin Schneider <vschneid@redhat.com>
Reviewed-by: Vincent Guittot <vincent.guittot@linaro.org>
Link: https://lore.kernel.org/r/20240308105901.1096078-8-mingo@kernel.org
---
 kernel/sched/fair.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 84d4791..f3c03c6 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -12409,15 +12409,16 @@ out:
 }
 
 /*
- * run_rebalance_domains is triggered when needed from the scheduler tick.
- * Also triggered for nohz idle balancing (with nohz_balancing_kick set).
+ * This softirq may be triggered from the scheduler tick, or by
+ * any of the flags in NOHZ_KICK_MASK: NOHZ_BALANCE_KICK,
+ * NOHZ_STATS_KICK or NOHZ_NEXT_KICK.
  */
 static __latent_entropy void run_rebalance_domains(struct softirq_action *h)
 {
 	struct rq *this_rq = this_rq();
 	enum cpu_idle_type idle = this_rq->idle_balance;
 	/*
-	 * If this CPU has a pending nohz_balance_kick, then do the
+	 * If this CPU has a pending NOHZ_BALANCE_KICK, then do the
 	 * balancing on behalf of the other idle CPUs whose ticks are
 	 * stopped. Do nohz_idle_balance *before* rebalance_domains to
 	 * give the idle CPUs a chance to load balance. Else we may