From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752907AbYJVHhL (ORCPT ); Wed, 22 Oct 2008 03:37:11 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751149AbYJVHg6 (ORCPT ); Wed, 22 Oct 2008 03:36:58 -0400 Received: from mx3.mail.elte.hu ([157.181.1.138]:33073 "EHLO mx3.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750930AbYJVHg5 (ORCPT ); Wed, 22 Oct 2008 03:36:57 -0400 Date: Wed, 22 Oct 2008 09:36:40 +0200 From: Ingo Molnar To: Li Zefan Cc: Peter Zijlstra , henrik@austad.us, linux-kernel@vger.kernel.org, Henrik Austad Subject: Re: sched: add CONFIG_SMP consistency Message-ID: <20081022073640.GA31633@elte.hu> References: <1224614719-14452-1-git-send-email-henrik@austad.us> <1224615681.661.3.camel@twins> <48FED566.7020907@cn.fujitsu.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <48FED566.7020907@cn.fujitsu.com> User-Agent: Mutt/1.5.18 (2008-05-17) X-ELTE-VirusStatus: clean X-ELTE-SpamScore: -1.5 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-1.5 required=5.9 tests=BAYES_00,DNS_FROM_SECURITYSAGE autolearn=no SpamAssassin version=3.2.3 -1.5 BAYES_00 BODY: Bayesian spam probability is 0 to 1% [score: 0.0000] 0.0 DNS_FROM_SECURITYSAGE RBL: Envelope sender in blackholes.securitysage.com Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org * Li Zefan wrote: > How about the following patch? i've applied it in the form below. Peter, does it look good to you too? Ingo --------------> >>From 667ff69f5a248fde6cf871f2c9c5c5d2aa182e71 Mon Sep 17 00:00:00 2001 From: Li Zefan Date: Wed, 22 Oct 2008 15:25:26 +0800 Subject: [PATCH] sched: add CONFIG_SMP consistency a patch from Henrik Austad did this: >> Do not declare select_task_rq as part of sched_class when CONFIG_SMP is >> not set. Peter observed: > While a proper cleanup, could you do it by re-arranging the methods so > as to not create an additional ifdef? Do not declare select_task_rq and some other methods as part of sched_class when CONFIG_SMP is not set. Also gather those methods to avoid CONFIG_SMP mess. Idea-by: Henrik Austad Signed-off-by: Li Zefan Acked-by: Peter Zijlstra Signed-off-by: Ingo Molnar --- include/linux/sched.h | 12 +++++++----- kernel/sched_fair.c | 5 ++--- kernel/sched_idletask.c | 5 ++--- kernel/sched_rt.c | 5 ++--- 4 files changed, 13 insertions(+), 14 deletions(-) diff --git a/include/linux/sched.h b/include/linux/sched.h index 4f59c8e..c05b45f 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -897,7 +897,6 @@ struct sched_class { void (*enqueue_task) (struct rq *rq, struct task_struct *p, int wakeup); void (*dequeue_task) (struct rq *rq, struct task_struct *p, int sleep); void (*yield_task) (struct rq *rq); - int (*select_task_rq)(struct task_struct *p, int sync); void (*check_preempt_curr) (struct rq *rq, struct task_struct *p, int sync); @@ -905,6 +904,8 @@ struct sched_class { void (*put_prev_task) (struct rq *rq, struct task_struct *p); #ifdef CONFIG_SMP + int (*select_task_rq)(struct task_struct *p, int sync); + unsigned long (*load_balance) (struct rq *this_rq, int this_cpu, struct rq *busiest, unsigned long max_load_move, struct sched_domain *sd, enum cpu_idle_type idle, @@ -916,16 +917,17 @@ struct sched_class { void (*pre_schedule) (struct rq *this_rq, struct task_struct *task); void (*post_schedule) (struct rq *this_rq); void (*task_wake_up) (struct rq *this_rq, struct task_struct *task); -#endif - void (*set_curr_task) (struct rq *rq); - void (*task_tick) (struct rq *rq, struct task_struct *p, int queued); - void (*task_new) (struct rq *rq, struct task_struct *p); void (*set_cpus_allowed)(struct task_struct *p, const cpumask_t *newmask); void (*rq_online)(struct rq *rq); void (*rq_offline)(struct rq *rq); +#endif + + void (*set_curr_task) (struct rq *rq); + void (*task_tick) (struct rq *rq, struct task_struct *p, int queued); + void (*task_new) (struct rq *rq, struct task_struct *p); void (*switched_from) (struct rq *this_rq, struct task_struct *task, int running); diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c index a0aa38b..8de48a5 100644 --- a/kernel/sched_fair.c +++ b/kernel/sched_fair.c @@ -1593,9 +1593,6 @@ static const struct sched_class fair_sched_class = { .enqueue_task = enqueue_task_fair, .dequeue_task = dequeue_task_fair, .yield_task = yield_task_fair, -#ifdef CONFIG_SMP - .select_task_rq = select_task_rq_fair, -#endif /* CONFIG_SMP */ .check_preempt_curr = check_preempt_wakeup, @@ -1603,6 +1600,8 @@ static const struct sched_class fair_sched_class = { .put_prev_task = put_prev_task_fair, #ifdef CONFIG_SMP + .select_task_rq = select_task_rq_fair, + .load_balance = load_balance_fair, .move_one_task = move_one_task_fair, #endif diff --git a/kernel/sched_idletask.c b/kernel/sched_idletask.c index dec4cca..8a21a2e 100644 --- a/kernel/sched_idletask.c +++ b/kernel/sched_idletask.c @@ -105,9 +105,6 @@ static const struct sched_class idle_sched_class = { /* dequeue is not valid, we print a debug message there: */ .dequeue_task = dequeue_task_idle, -#ifdef CONFIG_SMP - .select_task_rq = select_task_rq_idle, -#endif /* CONFIG_SMP */ .check_preempt_curr = check_preempt_curr_idle, @@ -115,6 +112,8 @@ static const struct sched_class idle_sched_class = { .put_prev_task = put_prev_task_idle, #ifdef CONFIG_SMP + .select_task_rq = select_task_rq_idle, + .load_balance = load_balance_idle, .move_one_task = move_one_task_idle, #endif diff --git a/kernel/sched_rt.c b/kernel/sched_rt.c index cdf5740..c9aa5be 100644 --- a/kernel/sched_rt.c +++ b/kernel/sched_rt.c @@ -1502,9 +1502,6 @@ static const struct sched_class rt_sched_class = { .enqueue_task = enqueue_task_rt, .dequeue_task = dequeue_task_rt, .yield_task = yield_task_rt, -#ifdef CONFIG_SMP - .select_task_rq = select_task_rq_rt, -#endif /* CONFIG_SMP */ .check_preempt_curr = check_preempt_curr_rt, @@ -1512,6 +1509,8 @@ static const struct sched_class rt_sched_class = { .put_prev_task = put_prev_task_rt, #ifdef CONFIG_SMP + .select_task_rq = select_task_rq_rt, + .load_balance = load_balance_rt, .move_one_task = move_one_task_rt, .set_cpus_allowed = set_cpus_allowed_rt,