Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759104AbbLCJW2 (ORCPT ); Thu, 3 Dec 2015 04:22:28 -0500 Received: from foss.arm.com ([217.140.101.70]:47465 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752465AbbLCJWZ (ORCPT ); Thu, 3 Dec 2015 04:22:25 -0500 Date: Thu, 3 Dec 2015 09:22:52 +0000 From: Juri Lelli To: Wanpeng Li Cc: Luca Abeni , Wanpeng Li , Ingo Molnar , Peter Zijlstra , "linux-kernel@vger.kernel.org" Subject: Re: [PATCH v5] sched/deadline: fix earliest_dl.next logic Message-ID: <20151203092252.GA20439@e106622-lin> References: <1449056847-17190-1-git-send-email-wanpeng.li@hotmail.com> <20151202120454.GZ20439@e106622-lin> <565EFB6A.10607@unitn.it> <565FFF5F.3000303@unitn.it> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: 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 Content-Length: 1819 Lines: 51 Hi, On 03/12/15 16:59, Wanpeng Li wrote: > 2015-12-03 16:37 GMT+08:00 Luca Abeni : > > Hi, > > > > On 12/03/2015 03:25 AM, Wanpeng Li wrote: > > [...] > >>> > >>> @@ -202,16 +197,18 @@ static void dequeue_pushable_dl_task(struct rq *rq, > >>> struct task_struct *p) > >>> > >>> next_node = rb_next(&p->pushable_dl_tasks); > >>> dl_rq->pushable_dl_tasks_leftmost = next_node; > >>> + if (next_node) > >>> + dl_rq->earliest_dl.next = rb_entry(next_node, > >>> + struct task_struct, > >>> pushable_dl_tasks)->dl.deadline; > >> > >> > >> Juri mentioned "updated leftmost", I'm not sure if it means that: > >> > >> @@ -195,6 +195,9 @@ static void dequeue_pushable_dl_task(struct rq > >> *rq, struct task_struct *p) > >> > >> next_node = rb_next(&p->pushable_dl_tasks); > >> dl_rq->pushable_dl_tasks_leftmost = next_node; > >> + if (dl_rq->pushable_dl_tasks_leftmost) > >> + dl_rq->earliest_dl.next = > >> rb_entry(dl_rq->pushable_dl_tasks_leftmost, > >> + struct task_struct, > >> pushable_dl_tasks)->dl.deadline; > >> } > > > > This is basically the same thing I tested (I just used "next_node" instead > > of "dl_rq->pushable_dl_tasks_leftmost" because the name is shorter), so I > > think it should work. > > Yeah, the same, what I want to know is Juri's choice. Ping Juri, :-) > IMHO, Luca's solution looks shorter/better :-). Thanks, - Juri -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/