From: Juri Lelli <juri.lelli@arm.com>
To: "byungchul.park" <byungchul.park@lge.com>
Cc: juri.lelli@gmail.com, peterz@infradead.org, mingo@kernel.org,
linux-kernel@vger.kernel.org, kernel-team@lge.com,
"'Steven Rostedt'" <rostedt@goodmis.org>
Subject: Re: [PATCH v3 2/2] sched/rt: Remove unnecessary condition in push_rt_task()
Date: Thu, 16 Feb 2017 08:43:06 +0000 [thread overview]
Message-ID: <20170216084306.GJ1368@e106622-lin> (raw)
In-Reply-To: <001801d28824$7f3f70f0$7dbe52d0$@lge.com>
Hi,
On 16/02/17 16:15, byungchul.park wrote:
> > -----Original Message-----
> > From: Steven Rostedt [mailto:rostedt@goodmis.org]
> > Sent: Thursday, February 16, 2017 11:46 AM
> > To: Byungchul Park
> > Cc: peterz@infradead.org; mingo@kernel.org; linux-kernel@vger.kernel.org;
> > juri.lelli@gmail.com; kernel-team@lge.com
> > Subject: Re: [PATCH v3 2/2] sched/rt: Remove unnecessary condition in
> > push_rt_task()
> >
> > On Thu, 16 Feb 2017 11:34:17 +0900
> > Byungchul Park <byungchul.park@lge.com> wrote:
> >
> > > pick_next_pushable_task(rq) has BUG_ON(rq_cpu != task_cpu(task)) when
> > > it returns a task other than NULL, which means that task_cpu(task) must
> > > be rq->cpu. So if task == next_task, then task_cpu(next_task) must be
> > > rq->cpu as well. Remove the redundant condition and make code simpler.
> > >
> > > By this patch, unnecessary one branch and two LOAD operations in 'if'
> > > statement can be avoided.
> > >
> > > Signed-off-by: Byungchul Park <byungchul.park@lge.com>
> > > Reviewed-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
> > > Reviewed-by: Juri Lelli <juri.lelli@arm.com>
> > > ---
> >
> > This is a different patch, I don't believe Juri reviewed it yet.
>
> Hello juri,
>
> I should have asked you first and been more careful before I added
> 'reviewed-by'. Can I ask you for your opinion about the additional one?
>
Looks good to me, you can leave my Reviewed-by.
Steve, thanks for pointing out that I didn't yet reviewed it. :)
Thanks,
- Juri
next prev parent reply other threads:[~2017-02-16 8:43 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-02-16 2:34 [PATCH v3 1/2] sched/deadline: Remove unnecessary condition in push_dl_task() Byungchul Park
2017-02-16 2:34 ` [PATCH v3 2/2] sched/rt: Remove unnecessary condition in push_rt_task() Byungchul Park
2017-02-16 2:45 ` Steven Rostedt
2017-02-16 3:03 ` Byungchul Park
2017-02-16 7:15 ` byungchul.park
2017-02-16 8:43 ` Juri Lelli [this message]
2017-02-16 17:36 ` Daniel Bristot de Oliveira
2017-02-16 17:35 ` [PATCH v3 1/2] sched/deadline: Remove unnecessary condition in push_dl_task() Daniel Bristot de Oliveira
2017-03-21 2:56 ` Byungchul Park
2017-02-22 5:00 ` Byungchul Park
2017-05-02 7:43 ` Byungchul Park
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