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From: Steve Sistare <steven.sistare@oracle.com>
To: mingo@redhat.com, peterz@infradead.org
Cc: subhra.mazumdar@oracle.com, dhaval.giani@oracle.com,
	daniel.m.jordan@oracle.com, pavel.tatashin@microsoft.com,
	matt@codeblueprint.co.uk, umgwanakikbuti@gmail.com,
	riel@redhat.com, jbacik@fb.com, juri.lelli@redhat.com,
	valentin.schneider@arm.com, vincent.guittot@linaro.org,
	quentin.perret@arm.com, steven.sistare@oracle.com,
	linux-kernel@vger.kernel.org
Subject: [PATCH v3 06/10] sched/fair: Generalize the detach_task interface
Date: Fri,  9 Nov 2018 04:50:36 -0800	[thread overview]
Message-ID: <1541767840-93588-7-git-send-email-steven.sistare@oracle.com> (raw)
In-Reply-To: <1541767840-93588-1-git-send-email-steven.sistare@oracle.com>

The detach_task function takes a struct lb_env argument, but only needs a
few of its members.  Pass the rq and cpu arguments explicitly so the
function may be called from code that is not based on lb_env.  No
functional change.

Signed-off-by: Steve Sistare <steven.sistare@oracle.com>
---
 kernel/sched/fair.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index da368ed..453d280 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -7199,15 +7199,15 @@ int can_migrate_task(struct task_struct *p, struct lb_env *env)
 }
 
 /*
- * detach_task() -- detach the task for the migration specified in env
+ * detach_task() -- detach the task for the migration from @src_rq to @dst_cpu.
  */
-static void detach_task(struct task_struct *p, struct lb_env *env)
+static void detach_task(struct task_struct *p, struct rq *src_rq, int dst_cpu)
 {
-	lockdep_assert_held(&env->src_rq->lock);
+	lockdep_assert_held(&src_rq->lock);
 
 	p->on_rq = TASK_ON_RQ_MIGRATING;
-	deactivate_task(env->src_rq, p, DEQUEUE_NOCLOCK);
-	set_task_cpu(p, env->dst_cpu);
+	deactivate_task(src_rq, p, DEQUEUE_NOCLOCK);
+	set_task_cpu(p, dst_cpu);
 }
 
 /*
@@ -7227,7 +7227,7 @@ static struct task_struct *detach_one_task(struct lb_env *env)
 		if (!can_migrate_task(p, env))
 			continue;
 
-		detach_task(p, env);
+		detach_task(p, env->src_rq, env->dst_cpu);
 
 		/*
 		 * Right now, this is only the second place where
@@ -7294,7 +7294,7 @@ static int detach_tasks(struct lb_env *env)
 		if ((load / 2) > env->imbalance)
 			goto next;
 
-		detach_task(p, env);
+		detach_task(p, env->src_rq, env->dst_cpu);
 		list_add(&p->se.group_node, &env->tasks);
 
 		detached++;
-- 
1.8.3.1


  parent reply	other threads:[~2018-11-09 13:01 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-11-09 12:50 [PATCH v3 00/10] steal tasks to improve CPU utilization Steve Sistare
2018-11-09 12:50 ` [PATCH v3 01/10] sched: Provide sparsemask, a reduced contention bitmap Steve Sistare
2018-11-27 15:16   ` Steven Sistare
2018-11-28  1:19     ` Omar Sandoval
2018-12-06 16:07       ` Steven Sistare
2018-12-06 18:19         ` Omar Sandoval
2018-11-09 12:50 ` [PATCH v3 02/10] sched/topology: Provide hooks to allocate data shared per LLC Steve Sistare
2018-11-09 12:50 ` [PATCH v3 03/10] sched/topology: Provide cfs_overload_cpus bitmap Steve Sistare
2018-11-09 17:38   ` Valentin Schneider
2018-11-19 17:32     ` Steven Sistare
2018-11-20 12:52       ` Valentin Schneider
2018-11-12 16:42   ` Valentin Schneider
2018-11-19 17:33     ` Steven Sistare
2018-11-20 12:42       ` Valentin Schneider
2018-11-26 19:06         ` Steven Sistare
2018-12-03 16:56           ` Valentin Schneider
2018-12-06 16:40             ` Steven Sistare
2018-12-06 17:28               ` Valentin Schneider
2018-11-09 12:50 ` [PATCH v3 04/10] sched/fair: Dynamically update cfs_overload_cpus Steve Sistare
2018-11-09 12:50 ` [PATCH v3 05/10] sched/fair: Hoist idle_stamp up from idle_balance Steve Sistare
2018-11-09 19:07   ` Valentin Schneider
2018-11-19 17:31     ` Steven Sistare
2018-11-20 10:24       ` Valentin Schneider
2018-11-09 12:50 ` Steve Sistare [this message]
2018-11-09 12:50 ` [PATCH v3 07/10] sched/fair: Provide can_migrate_task_llc Steve Sistare
2018-11-09 12:50 ` [PATCH v3 08/10] sched/fair: Steal work from an overloaded CPU when CPU goes idle Steve Sistare
2018-11-09 12:50 ` [PATCH v3 09/10] sched/fair: disable stealing if too many NUMA nodes Steve Sistare
2018-11-09 12:50 ` [PATCH v3 10/10] sched/fair: Provide idle search schedstats Steve Sistare
2018-11-10 17:08   ` kbuild test robot
2018-11-09 15:02 ` hackbench run scripts Steven Sistare

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