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

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Date:   Fri, 8 Jul 2022 14:50:07 +0200
From:   Vincent Guittot <vincent.guittot@...aro.org>
To:     Hao Jia <jiahao.os@...edance.com>
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 Fri, 8 Jul 2022 at 12:32, Hao Jia <jiahao.os@...edance.com> wrote:
>
>
>
> 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？

looks good to me

>
> 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
> >>