linux-kernel - Re: [External] Re: [PATCH] sched/fair: Remove unused parameter idle of _nohz_idle

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Message-ID: <1a9656a2-024e-497f-a0e6-3ec65910ab54@bytedance.com>
Date:   Fri, 8 Jul 2022 18:31:56 +0800
From:   Hao Jia <jiahao.os@...edance.com>
To:     Vincent Guittot <vincent.guittot@...aro.org>
Cc:     mingo@...hat.com, peterz@...radead.org, juri.lelli@...hat.com,
        dietmar.eggemann@....com, rostedt@...dmis.org, bsegall@...gle.com,
        mgorman@...e.de, bristot@...hat.com, vschneid@...hat.com,
        linux-kernel@...r.kernel.org
Subject: Re: [External] Re: [PATCH] sched/fair: Remove unused parameter idle
 of _nohz_idle_balance()



On 2022/7/7 Vincent Guittot wrote:
> On Thu, 7 Jul 2022 at 05:42, Hao Jia <jiahao.os@...edance.com> wrote:
>>
>> Since commit 7a82e5f52a35 ("sched/fair: Merge for each idle cpu
>> loop of ILB") was merged. The parameter idle of _nohz_idle_balance()
> 
> The description of the commit should be in a single line.
> 
> commit 7a82e5f52a35 ("sched/fair: Merge for each idle cpu loop of ILB")
> 

Thank you for your suggestion.

how about this？

Commit 7a82e5f52a35 ("sched/fair: Merge for each idle cpu loop of ILB")
has been merged. The parameter idle of _nohz_idle_balance()
is not used anymore so we can remove it.

Signed-off-by: Hao Jia <jiahao.os@...edance.com>
Reviewed-by: Vincent Guittot <vincent.guittot@...aro.org>

>> is not used anymore so we can remove it.
>>
>> Signed-off-by: Hao Jia <jiahao.os@...edance.com>
> 
> Reviewed-by: Vincent Guittot <vincent.guittot@...aro.org>
> 
>> ---
>>   kernel/sched/fair.c | 7 +++----
>>   1 file changed, 3 insertions(+), 4 deletions(-)
>>
>> diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
>> index 77b2048a9326..8d4be2a95e37 100644
>> --- a/kernel/sched/fair.c
>> +++ b/kernel/sched/fair.c
>> @@ -10682,8 +10682,7 @@ static bool update_nohz_stats(struct rq *rq)
>>    * can be a simple update of blocked load or a complete load balance with
>>    * tasks movement depending of flags.
>>    */
>> -static void _nohz_idle_balance(struct rq *this_rq, unsigned int flags,
>> -                              enum cpu_idle_type idle)
>> +static void _nohz_idle_balance(struct rq *this_rq, unsigned int flags)
>>   {
>>          /* Earliest time when we have to do rebalance again */
>>          unsigned long now = jiffies;
>> @@ -10798,7 +10797,7 @@ static bool nohz_idle_balance(struct rq *this_rq, enum cpu_idle_type idle)
>>          if (idle != CPU_IDLE)
>>                  return false;
>>
>> -       _nohz_idle_balance(this_rq, flags, idle);
>> +       _nohz_idle_balance(this_rq, flags);
>>
>>          return true;
>>   }
>> @@ -10818,7 +10817,7 @@ void nohz_run_idle_balance(int cpu)
>>           * (ie NOHZ_STATS_KICK set) and will do the same.
>>           */
>>          if ((flags == NOHZ_NEWILB_KICK) && !need_resched())
>> -               _nohz_idle_balance(cpu_rq(cpu), NOHZ_STATS_KICK, CPU_IDLE);
>> +               _nohz_idle_balance(cpu_rq(cpu), NOHZ_STATS_KICK);
>>   }
>>
>>   static void nohz_newidle_balance(struct rq *this_rq)
>> --
>> 2.32.0
>>