From: Steven Rostedt <rostedt@goodmis.org>
To: Byungchul Park <byungchul.park@lge.com>
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()
Date: Wed, 15 Feb 2017 21:45:37 -0500 [thread overview]
Message-ID: <20170215214537.7936f336@grimm.local.home> (raw)
In-Reply-To: <1487212457-28839-2-git-send-email-byungchul.park@lge.com>
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.
-- Steve
next prev parent reply other threads:[~2017-02-16 2:45 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 [this message]
2017-02-16 3:03 ` Byungchul Park
2017-02-16 7:15 ` byungchul.park
2017-02-16 8:43 ` Juri Lelli
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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