From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753096AbdBPInK (ORCPT ); Thu, 16 Feb 2017 03:43:10 -0500 Received: from foss.arm.com ([217.140.101.70]:38728 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751583AbdBPInJ (ORCPT ); Thu, 16 Feb 2017 03:43:09 -0500 Date: Thu, 16 Feb 2017 08:43:06 +0000 From: Juri Lelli To: "byungchul.park" Cc: juri.lelli@gmail.com, peterz@infradead.org, mingo@kernel.org, linux-kernel@vger.kernel.org, kernel-team@lge.com, "'Steven Rostedt'" Subject: Re: [PATCH v3 2/2] sched/rt: Remove unnecessary condition in push_rt_task() Message-ID: <20170216084306.GJ1368@e106622-lin> References: <1487212457-28839-1-git-send-email-byungchul.park@lge.com> <1487212457-28839-2-git-send-email-byungchul.park@lge.com> <20170215214537.7936f336@grimm.local.home> <001801d28824$7f3f70f0$7dbe52d0$@lge.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <001801d28824$7f3f70f0$7dbe52d0$@lge.com> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 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 > > > Reviewed-by: Steven Rostedt (VMware) > > > Reviewed-by: Juri Lelli > > > --- > > > > 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