From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932899AbcIELzb (ORCPT ); Mon, 5 Sep 2016 07:55:31 -0400 Received: from terminus.zytor.com ([198.137.202.10]:36408 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755579AbcIELz1 (ORCPT ); Mon, 5 Sep 2016 07:55:27 -0400 Date: Mon, 5 Sep 2016 04:54:51 -0700 From: tip-bot for Tommaso Cucinotta Message-ID: Cc: linux-kernel@vger.kernel.org, torvalds@linux-foundation.org, tommaso.cucinotta@sssup.it, hpa@zytor.com, luca.abeni@unitn.it, mingo@kernel.org, juri.lelli@arm.com, peterz@infradead.org, juri.lelli@gmail.com, tglx@linutronix.de Reply-To: juri.lelli@gmail.com, tglx@linutronix.de, peterz@infradead.org, mingo@kernel.org, hpa@zytor.com, luca.abeni@unitn.it, juri.lelli@arm.com, tommaso.cucinotta@sssup.it, torvalds@linux-foundation.org, linux-kernel@vger.kernel.org In-Reply-To: <1471184828-12644-4-git-send-email-tommaso.cucinotta@sssup.it> References: <1471184828-12644-4-git-send-email-tommaso.cucinotta@sssup.it> To: linux-tip-commits@vger.kernel.org Subject: [tip:sched/core] sched/deadline: Split cpudl_set() into cpudl_set() and cpudl_clear() Git-Commit-ID: d8206bb3ffe0eaee03abfad46fd44d8b17142e88 X-Mailer: tip-git-log-daemon Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Commit-ID: d8206bb3ffe0eaee03abfad46fd44d8b17142e88 Gitweb: http://git.kernel.org/tip/d8206bb3ffe0eaee03abfad46fd44d8b17142e88 Author: Tommaso Cucinotta AuthorDate: Sun, 14 Aug 2016 16:27:08 +0200 Committer: Ingo Molnar CommitDate: Mon, 5 Sep 2016 13:29:43 +0200 sched/deadline: Split cpudl_set() into cpudl_set() and cpudl_clear() These 2 exercise independent code paths and need different arguments. After this change, you call: cpudl_clear(cp, cpu); cpudl_set(cp, cpu, dl); instead of: cpudl_set(cp, cpu, 0 /* dl */, 0 /* is_valid */); cpudl_set(cp, cpu, dl, 1 /* is_valid */); Signed-off-by: Tommaso Cucinotta Signed-off-by: Peter Zijlstra (Intel) Reviewed-by: Luca Abeni Reviewed-by: Juri Lelli Cc: Juri Lelli Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: linux-dl@retis.sssup.it Link: http://lkml.kernel.org/r/1471184828-12644-4-git-send-email-tommaso.cucinotta@sssup.it Signed-off-by: Ingo Molnar --- kernel/sched/cpudeadline.c | 49 +++++++++++++++++++++++++++++++--------------- kernel/sched/cpudeadline.h | 3 ++- kernel/sched/deadline.c | 10 +++++----- 3 files changed, 40 insertions(+), 22 deletions(-) diff --git a/kernel/sched/cpudeadline.c b/kernel/sched/cpudeadline.c index 0ace75a..e731190 100644 --- a/kernel/sched/cpudeadline.c +++ b/kernel/sched/cpudeadline.c @@ -145,16 +145,15 @@ out: } /* - * cpudl_set - update the cpudl max-heap + * cpudl_clear - remove a cpu from the cpudl max-heap * @cp: the cpudl max-heap context * @cpu: the target cpu - * @dl: the new earliest deadline for this cpu * * Notes: assumes cpu_rq(cpu)->lock is locked * * Returns: (void) */ -void cpudl_set(struct cpudl *cp, int cpu, u64 dl, int is_valid) +void cpudl_clear(struct cpudl *cp, int cpu) { int old_idx, new_cpu; unsigned long flags; @@ -162,17 +161,15 @@ void cpudl_set(struct cpudl *cp, int cpu, u64 dl, int is_valid) WARN_ON(!cpu_present(cpu)); raw_spin_lock_irqsave(&cp->lock, flags); + old_idx = cp->elements[cpu].idx; - if (!is_valid) { - /* remove item */ - if (old_idx == IDX_INVALID) { - /* - * Nothing to remove if old_idx was invalid. - * This could happen if a rq_offline_dl is - * called for a CPU without -dl tasks running. - */ - goto out; - } + if (old_idx == IDX_INVALID) { + /* + * Nothing to remove if old_idx was invalid. + * This could happen if a rq_offline_dl is + * called for a CPU without -dl tasks running. + */ + } else { new_cpu = cp->elements[cp->size - 1].cpu; cp->elements[old_idx].dl = cp->elements[cp->size - 1].dl; cp->elements[old_idx].cpu = new_cpu; @@ -180,11 +177,32 @@ void cpudl_set(struct cpudl *cp, int cpu, u64 dl, int is_valid) cp->elements[new_cpu].idx = old_idx; cp->elements[cpu].idx = IDX_INVALID; cpudl_heapify(cp, old_idx); - cpumask_set_cpu(cpu, cp->free_cpus); - goto out; + cpumask_set_cpu(cpu, cp->free_cpus); } + raw_spin_unlock_irqrestore(&cp->lock, flags); +} + +/* + * cpudl_set - update the cpudl max-heap + * @cp: the cpudl max-heap context + * @cpu: the target cpu + * @dl: the new earliest deadline for this cpu + * + * Notes: assumes cpu_rq(cpu)->lock is locked + * + * Returns: (void) + */ +void cpudl_set(struct cpudl *cp, int cpu, u64 dl) +{ + int old_idx; + unsigned long flags; + + WARN_ON(!cpu_present(cpu)); + raw_spin_lock_irqsave(&cp->lock, flags); + + old_idx = cp->elements[cpu].idx; if (old_idx == IDX_INVALID) { int new_idx = cp->size++; cp->elements[new_idx].dl = dl; @@ -197,7 +215,6 @@ void cpudl_set(struct cpudl *cp, int cpu, u64 dl, int is_valid) cpudl_heapify(cp, old_idx); } -out: raw_spin_unlock_irqrestore(&cp->lock, flags); } diff --git a/kernel/sched/cpudeadline.h b/kernel/sched/cpudeadline.h index fcbdf83..f7da8c5 100644 --- a/kernel/sched/cpudeadline.h +++ b/kernel/sched/cpudeadline.h @@ -23,7 +23,8 @@ struct cpudl { #ifdef CONFIG_SMP int cpudl_find(struct cpudl *cp, struct task_struct *p, struct cpumask *later_mask); -void cpudl_set(struct cpudl *cp, int cpu, u64 dl, int is_valid); +void cpudl_set(struct cpudl *cp, int cpu, u64 dl); +void cpudl_clear(struct cpudl *cp, int cpu); int cpudl_init(struct cpudl *cp); void cpudl_set_freecpu(struct cpudl *cp, int cpu); void cpudl_clear_freecpu(struct cpudl *cp, int cpu); diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c index d091f4a..18fb0b8 100644 --- a/kernel/sched/deadline.c +++ b/kernel/sched/deadline.c @@ -798,7 +798,7 @@ static void inc_dl_deadline(struct dl_rq *dl_rq, u64 deadline) if (dl_rq->earliest_dl.curr == 0 || dl_time_before(deadline, dl_rq->earliest_dl.curr)) { dl_rq->earliest_dl.curr = deadline; - cpudl_set(&rq->rd->cpudl, rq->cpu, deadline, 1); + cpudl_set(&rq->rd->cpudl, rq->cpu, deadline); } } @@ -813,14 +813,14 @@ static void dec_dl_deadline(struct dl_rq *dl_rq, u64 deadline) if (!dl_rq->dl_nr_running) { dl_rq->earliest_dl.curr = 0; dl_rq->earliest_dl.next = 0; - cpudl_set(&rq->rd->cpudl, rq->cpu, 0, 0); + cpudl_clear(&rq->rd->cpudl, rq->cpu); } else { struct rb_node *leftmost = dl_rq->rb_leftmost; struct sched_dl_entity *entry; entry = rb_entry(leftmost, struct sched_dl_entity, rb_node); dl_rq->earliest_dl.curr = entry->deadline; - cpudl_set(&rq->rd->cpudl, rq->cpu, entry->deadline, 1); + cpudl_set(&rq->rd->cpudl, rq->cpu, entry->deadline); } } @@ -1671,7 +1671,7 @@ static void rq_online_dl(struct rq *rq) cpudl_set_freecpu(&rq->rd->cpudl, rq->cpu); if (rq->dl.dl_nr_running > 0) - cpudl_set(&rq->rd->cpudl, rq->cpu, rq->dl.earliest_dl.curr, 1); + cpudl_set(&rq->rd->cpudl, rq->cpu, rq->dl.earliest_dl.curr); } /* Assumes rq->lock is held */ @@ -1680,7 +1680,7 @@ static void rq_offline_dl(struct rq *rq) if (rq->dl.overloaded) dl_clear_overload(rq); - cpudl_set(&rq->rd->cpudl, rq->cpu, 0, 0); + cpudl_clear(&rq->rd->cpudl, rq->cpu); cpudl_clear_freecpu(&rq->rd->cpudl, rq->cpu); }