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From: Peter Zijlstra <a.p.zijlstra@chello.nl>
To: Chris Mason <chris.mason@oracle.com>,
	Frank Rowand <frank.rowand@am.sony.com>,
	Ingo Molnar <mingo@elte.hu>, Thomas Gleixner <tglx@linutronix.de>,
	Mike Galbraith <efault@gmx.de>, Oleg Nesterov <oleg@redhat.com>,
	Paul Turner <pjt@google.com>, Jens Axboe <axboe@kernel.dk>,
	Yong Zhang <yong.zhang0@gmail.com>
Cc: linux-kernel@vger.kernel.org, Peter Zijlstra <a.p.zijlstra@chello.nl>
Subject: [PATCH 06/21] sched: Provide p->on_rq
Date: Tue, 05 Apr 2011 17:23:44 +0200
Message-ID: <20110405152728.949545047@chello.nl> (raw)
In-Reply-To: <20110405152338.692966333@chello.nl>

[-- Attachment #0: sched-onrq.patch --]
[-- Type: text/plain, Size: 9619 bytes --]

Provide a generic p->on_rq because the p->se.on_rq semantics are
unfavourable for lockless wakeups but needed for sched_fair.

In particular, p->on_rq is only cleared when we actually dequeue the
task in schedule() and not on any random dequeue as done by things
like __migrate_task() and __sched_setscheduler().

This also allows us to remove p->se usage from !sched_fair code.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Reviewed-by: Frank Rowand <frank.rowand@am.sony.com>
---
 include/linux/sched.h   |    1 +
 kernel/sched.c          |   37 +++++++++++++++++++------------------
 kernel/sched_debug.c    |    2 +-
 kernel/sched_rt.c       |   16 ++++++++--------
 kernel/sched_stoptask.c |    2 +-
 5 files changed, 30 insertions(+), 28 deletions(-)

Index: linux-2.6/include/linux/sched.h
===================================================================
--- linux-2.6.orig/include/linux/sched.h
+++ linux-2.6/include/linux/sched.h
@@ -1208,6 +1208,7 @@ struct task_struct {
 #ifdef CONFIG_SMP
 	int on_cpu;
 #endif
+	int on_rq;
 
 	int prio, static_prio, normal_prio;
 	unsigned int rt_priority;
Index: linux-2.6/kernel/sched.c
===================================================================
--- linux-2.6.orig/kernel/sched.c
+++ linux-2.6/kernel/sched.c
@@ -1788,7 +1788,6 @@ static void enqueue_task(struct rq *rq, 
 	update_rq_clock(rq);
 	sched_info_queued(p);
 	p->sched_class->enqueue_task(rq, p, flags);
-	p->se.on_rq = 1;
 }
 
 static void dequeue_task(struct rq *rq, struct task_struct *p, int flags)
@@ -1796,7 +1795,6 @@ static void dequeue_task(struct rq *rq, 
 	update_rq_clock(rq);
 	sched_info_dequeued(p);
 	p->sched_class->dequeue_task(rq, p, flags);
-	p->se.on_rq = 0;
 }
 
 /*
@@ -2131,7 +2129,7 @@ static void check_preempt_curr(struct rq
 	 * A queue event has occurred, and we're going to schedule.  In
 	 * this case, we can save a useless back to back clock update.
 	 */
-	if (rq->curr->se.on_rq && test_tsk_need_resched(rq->curr))
+	if (rq->curr->on_rq && test_tsk_need_resched(rq->curr))
 		rq->skip_clock_update = 1;
 }
 
@@ -2206,7 +2204,7 @@ static bool migrate_task(struct task_str
 	 * If the task is not on a runqueue (and not running), then
 	 * the next wake-up will properly place the task.
 	 */
-	return p->se.on_rq || task_running(rq, p);
+	return p->on_rq || task_running(rq, p);
 }
 
 /*
@@ -2266,7 +2264,7 @@ unsigned long wait_task_inactive(struct 
 		rq = task_rq_lock(p, &flags);
 		trace_sched_wait_task(p);
 		running = task_running(rq, p);
-		on_rq = p->se.on_rq;
+		on_rq = p->on_rq;
 		ncsw = 0;
 		if (!match_state || p->state == match_state)
 			ncsw = p->nvcsw | LONG_MIN; /* sets MSB */
@@ -2502,7 +2500,7 @@ static int try_to_wake_up(struct task_st
 
 	cpu = task_cpu(p);
 
-	if (p->se.on_rq)
+	if (p->on_rq)
 		goto out_running;
 
 	orig_cpu = cpu;
@@ -2549,6 +2547,7 @@ static int try_to_wake_up(struct task_st
 out_activate:
 #endif /* CONFIG_SMP */
 	activate_task(rq, p, en_flags);
+	p->on_rq = 1;
 out_running:
 	ttwu_post_activation(p, rq, wake_flags);
 	ttwu_stat(rq, p, cpu, wake_flags);
@@ -2579,7 +2578,7 @@ static void try_to_wake_up_local(struct 
 	if (!(p->state & TASK_NORMAL))
 		return;
 
-	if (!p->se.on_rq)
+	if (!p->on_rq)
 		activate_task(rq, p, ENQUEUE_WAKEUP);
 
 	ttwu_post_activation(p, rq, 0);
@@ -2616,19 +2615,21 @@ int wake_up_state(struct task_struct *p,
  */
 static void __sched_fork(struct task_struct *p)
 {
+	p->on_rq			= 0;
+
+	p->se.on_rq			= 0;
 	p->se.exec_start		= 0;
 	p->se.sum_exec_runtime		= 0;
 	p->se.prev_sum_exec_runtime	= 0;
 	p->se.nr_migrations		= 0;
 	p->se.vruntime			= 0;
+	INIT_LIST_HEAD(&p->se.group_node);
 
 #ifdef CONFIG_SCHEDSTATS
 	memset(&p->se.statistics, 0, sizeof(p->se.statistics));
 #endif
 
 	INIT_LIST_HEAD(&p->rt.run_list);
-	p->se.on_rq = 0;
-	INIT_LIST_HEAD(&p->se.group_node);
 
 #ifdef CONFIG_PREEMPT_NOTIFIERS
 	INIT_HLIST_HEAD(&p->preempt_notifiers);
@@ -2746,6 +2747,7 @@ void wake_up_new_task(struct task_struct
 
 	rq = task_rq_lock(p, &flags);
 	activate_task(rq, p, 0);
+	p->on_rq = 1;
 	trace_sched_wakeup_new(p, true);
 	check_preempt_curr(rq, p, WF_FORK);
 #ifdef CONFIG_SMP
@@ -4047,7 +4049,7 @@ static inline void schedule_debug(struct
 
 static void put_prev_task(struct rq *rq, struct task_struct *prev)
 {
-	if (prev->se.on_rq)
+	if (prev->on_rq)
 		update_rq_clock(rq);
 	prev->sched_class->put_prev_task(rq, prev);
 }
@@ -4126,6 +4128,7 @@ asmlinkage void __sched schedule(void)
 					try_to_wake_up_local(to_wakeup);
 			}
 			deactivate_task(rq, prev, DEQUEUE_SLEEP);
+			prev->on_rq = 0;
 		}
 		switch_count = &prev->nvcsw;
 	}
@@ -4687,7 +4690,7 @@ void rt_mutex_setprio(struct task_struct
 	trace_sched_pi_setprio(p, prio);
 	oldprio = p->prio;
 	prev_class = p->sched_class;
-	on_rq = p->se.on_rq;
+	on_rq = p->on_rq;
 	running = task_current(rq, p);
 	if (on_rq)
 		dequeue_task(rq, p, 0);
@@ -4735,7 +4738,7 @@ void set_user_nice(struct task_struct *p
 		p->static_prio = NICE_TO_PRIO(nice);
 		goto out_unlock;
 	}
-	on_rq = p->se.on_rq;
+	on_rq = p->on_rq;
 	if (on_rq)
 		dequeue_task(rq, p, 0);
 
@@ -4869,8 +4872,6 @@ static struct task_struct *find_process_
 static void
 __setscheduler(struct rq *rq, struct task_struct *p, int policy, int prio)
 {
-	BUG_ON(p->se.on_rq);
-
 	p->policy = policy;
 	p->rt_priority = prio;
 	p->normal_prio = normal_prio(p);
@@ -5022,7 +5023,7 @@ static int __sched_setscheduler(struct t
 		raw_spin_unlock_irqrestore(&p->pi_lock, flags);
 		goto recheck;
 	}
-	on_rq = p->se.on_rq;
+	on_rq = p->on_rq;
 	running = task_current(rq, p);
 	if (on_rq)
 		deactivate_task(rq, p, 0);
@@ -5939,7 +5940,7 @@ static int __migrate_task(struct task_st
 	 * If we're not on a rq, the next wake-up will ensure we're
 	 * placed properly.
 	 */
-	if (p->se.on_rq) {
+	if (p->on_rq) {
 		deactivate_task(rq_src, p, 0);
 		set_task_cpu(p, dest_cpu);
 		activate_task(rq_dest, p, 0);
@@ -7930,7 +7931,7 @@ static void normalize_task(struct rq *rq
 	int old_prio = p->prio;
 	int on_rq;
 
-	on_rq = p->se.on_rq;
+	on_rq = p->on_rq;
 	if (on_rq)
 		deactivate_task(rq, p, 0);
 	__setscheduler(rq, p, SCHED_NORMAL, 0);
@@ -8276,7 +8277,7 @@ void sched_move_task(struct task_struct 
 	rq = task_rq_lock(tsk, &flags);
 
 	running = task_current(rq, tsk);
-	on_rq = tsk->se.on_rq;
+	on_rq = tsk->on_rq;
 
 	if (on_rq)
 		dequeue_task(rq, tsk, 0);
Index: linux-2.6/kernel/sched_debug.c
===================================================================
--- linux-2.6.orig/kernel/sched_debug.c
+++ linux-2.6/kernel/sched_debug.c
@@ -152,7 +152,7 @@ static void print_rq(struct seq_file *m,
 	read_lock_irqsave(&tasklist_lock, flags);
 
 	do_each_thread(g, p) {
-		if (!p->se.on_rq || task_cpu(p) != rq_cpu)
+		if (!p->on_rq || task_cpu(p) != rq_cpu)
 			continue;
 
 		print_task(m, rq, p);
Index: linux-2.6/kernel/sched_rt.c
===================================================================
--- linux-2.6.orig/kernel/sched_rt.c
+++ linux-2.6/kernel/sched_rt.c
@@ -1136,7 +1136,7 @@ static void put_prev_task_rt(struct rq *
 	 * The previous task needs to be made eligible for pushing
 	 * if it is still active
 	 */
-	if (p->se.on_rq && p->rt.nr_cpus_allowed > 1)
+	if (on_rt_rq(&p->rt) && p->rt.nr_cpus_allowed > 1)
 		enqueue_pushable_task(rq, p);
 }
 
@@ -1287,7 +1287,7 @@ static struct rq *find_lock_lowest_rq(st
 				     !cpumask_test_cpu(lowest_rq->cpu,
 						       &task->cpus_allowed) ||
 				     task_running(rq, task) ||
-				     !task->se.on_rq)) {
+				     !task->on_rq)) {
 
 				raw_spin_unlock(&lowest_rq->lock);
 				lowest_rq = NULL;
@@ -1321,7 +1321,7 @@ static struct task_struct *pick_next_pus
 	BUG_ON(task_current(rq, p));
 	BUG_ON(p->rt.nr_cpus_allowed <= 1);
 
-	BUG_ON(!p->se.on_rq);
+	BUG_ON(!p->on_rq);
 	BUG_ON(!rt_task(p));
 
 	return p;
@@ -1467,7 +1467,7 @@ static int pull_rt_task(struct rq *this_
 		 */
 		if (p && (p->prio < this_rq->rt.highest_prio.curr)) {
 			WARN_ON(p == src_rq->curr);
-			WARN_ON(!p->se.on_rq);
+			WARN_ON(!p->on_rq);
 
 			/*
 			 * There's a chance that p is higher in priority
@@ -1538,7 +1538,7 @@ static void set_cpus_allowed_rt(struct t
 	 * Update the migration status of the RQ if we have an RT task
 	 * which is running AND changing its weight value.
 	 */
-	if (p->se.on_rq && (weight != p->rt.nr_cpus_allowed)) {
+	if (p->on_rq && (weight != p->rt.nr_cpus_allowed)) {
 		struct rq *rq = task_rq(p);
 
 		if (!task_current(rq, p)) {
@@ -1608,7 +1608,7 @@ static void switched_from_rt(struct rq *
 	 * we may need to handle the pulling of RT tasks
 	 * now.
 	 */
-	if (p->se.on_rq && !rq->rt.rt_nr_running)
+	if (p->on_rq && !rq->rt.rt_nr_running)
 		pull_rt_task(rq);
 }
 
@@ -1638,7 +1638,7 @@ static void switched_to_rt(struct rq *rq
 	 * If that current running task is also an RT task
 	 * then see if we can move to another run queue.
 	 */
-	if (p->se.on_rq && rq->curr != p) {
+	if (p->on_rq && rq->curr != p) {
 #ifdef CONFIG_SMP
 		if (rq->rt.overloaded && push_rt_task(rq) &&
 		    /* Don't resched if we changed runqueues */
@@ -1657,7 +1657,7 @@ static void switched_to_rt(struct rq *rq
 static void
 prio_changed_rt(struct rq *rq, struct task_struct *p, int oldprio)
 {
-	if (!p->se.on_rq)
+	if (!p->on_rq)
 		return;
 
 	if (rq->curr == p) {
Index: linux-2.6/kernel/sched_stoptask.c
===================================================================
--- linux-2.6.orig/kernel/sched_stoptask.c
+++ linux-2.6/kernel/sched_stoptask.c
@@ -26,7 +26,7 @@ static struct task_struct *pick_next_tas
 {
 	struct task_struct *stop = rq->stop;
 
-	if (stop && stop->se.on_rq)
+	if (stop && stop->on_rq)
 		return stop;
 
 	return NULL;



  parent reply index

Thread overview: 152+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-04-05 15:23 [PATCH 00/21] sched: Reduce runqueue lock contention -v6 Peter Zijlstra
2011-04-05 15:23 ` [PATCH 01/21] sched: Provide scheduler_ipi() callback in response to smp_send_reschedule() Peter Zijlstra
2011-04-13 21:15   ` Tony Luck
2011-04-13 21:38     ` Peter Zijlstra
2011-04-14  8:31   ` [tip:sched/locking] " tip-bot for Peter Zijlstra
2011-04-05 15:23 ` [PATCH 02/21] sched: Always provide p->on_cpu Peter Zijlstra
2011-04-14  8:31   ` [tip:sched/locking] " tip-bot for Peter Zijlstra
2011-04-05 15:23 ` [PATCH 03/21] mutex: Use p->on_cpu for the adaptive spin Peter Zijlstra
2011-04-14  8:32   ` [tip:sched/locking] " tip-bot for Peter Zijlstra
2011-04-05 15:23 ` [PATCH 04/21] sched: Change the ttwu success details Peter Zijlstra
2011-04-13  9:23   ` Peter Zijlstra
2011-04-13 10:48     ` Peter Zijlstra
2011-04-13 11:06       ` Peter Zijlstra
2011-04-13 18:39         ` Tejun Heo
2011-04-13 19:11           ` Peter Zijlstra
2011-04-14  8:32   ` [tip:sched/locking] sched: Change the ttwu() " tip-bot for Peter Zijlstra
2011-04-05 15:23 ` [PATCH 05/21] sched: Clean up ttwu stats Peter Zijlstra
2011-04-14  8:33   ` [tip:sched/locking] sched: Clean up ttwu() stats tip-bot for Peter Zijlstra
2011-04-05 15:23 ` Peter Zijlstra [this message]
2011-04-14  8:33   ` [tip:sched/locking] sched: Provide p->on_rq tip-bot for Peter Zijlstra
2011-04-05 15:23 ` [PATCH 07/21] sched: Serialize p->cpus_allowed and ttwu() using p->pi_lock Peter Zijlstra
2011-04-14  8:34   ` [tip:sched/locking] " tip-bot for Peter Zijlstra
2011-04-05 15:23 ` [PATCH 08/21] sched: Drop the rq argument to sched_class::select_task_rq() Peter Zijlstra
2011-04-14  8:34   ` [tip:sched/locking] " tip-bot for Peter Zijlstra
2011-04-05 15:23 ` [PATCH 09/21] sched: Remove rq argument to sched_class::task_waking() Peter Zijlstra
2011-04-14  8:35   ` [tip:sched/locking] " tip-bot for Peter Zijlstra
2011-04-05 15:23 ` [PATCH 10/21] sched: Deal with non-atomic min_vruntime reads on 32bits Peter Zijlstra
2011-04-14  8:35   ` [tip:sched/locking] " tip-bot for Peter Zijlstra
2011-04-05 15:23 ` [PATCH 11/21] sched: Delay task_contributes_to_load() Peter Zijlstra
2011-04-14  8:35   ` [tip:sched/locking] " tip-bot for Peter Zijlstra
2011-04-05 15:23 ` [PATCH 12/21] sched: Also serialize ttwu_local() with p->pi_lock Peter Zijlstra
2011-04-14  8:36   ` [tip:sched/locking] " tip-bot for Peter Zijlstra
2011-04-05 15:23 ` [PATCH 13/21] sched: Add p->pi_lock to task_rq_lock() Peter Zijlstra
2011-04-14  8:36   ` [tip:sched/locking] " tip-bot for Peter Zijlstra
2011-06-01 13:58     ` Arne Jansen
2011-06-01 16:35       ` Peter Zijlstra
2011-06-01 17:20         ` Arne Jansen
2011-06-01 18:09           ` Peter Zijlstra
2011-06-01 18:44             ` Peter Zijlstra
2011-06-01 19:30               ` Arne Jansen
2011-06-01 21:09                 ` Linus Torvalds
2011-06-03  9:15                   ` Peter Zijlstra
2011-06-03 10:02                     ` Arne Jansen
2011-06-03 10:30                       ` Peter Zijlstra
2011-06-03 11:52                         ` Arne Jansen
2011-06-05  8:17                         ` Ingo Molnar
2011-06-05  8:53                           ` Arne Jansen
2011-06-05  9:41                             ` Ingo Molnar
2011-06-05  9:45                               ` Ingo Molnar
2011-06-05  9:43                           ` Arne Jansen
2011-06-05  9:55                             ` Ingo Molnar
2011-06-05 10:22                               ` Arne Jansen
2011-06-05 11:01                                 ` Ingo Molnar
2011-06-05 11:19                                   ` [debug patch] printk: Add a printk killswitch to robustify NMI watchdog messages Ingo Molnar
2011-06-05 11:36                                     ` Ingo Molnar
2011-06-05 11:57                                       ` Arne Jansen
2011-06-05 13:39                                         ` Ingo Molnar
2011-06-05 13:54                                           ` Arne Jansen
2011-06-05 14:06                                             ` Ingo Molnar
2011-06-05 14:45                                               ` Arne Jansen
2011-06-05 14:10                                             ` Ingo Molnar
2011-06-05 14:31                                               ` Arne Jansen
2011-06-05 15:13                                                 ` Ingo Molnar
2011-06-05 15:26                                                   ` Ingo Molnar
2011-06-05 15:32                                                     ` Ingo Molnar
2011-06-05 16:07                                                       ` Arne Jansen
2011-06-05 16:35                                                         ` Arne Jansen
2011-06-05 16:50                                                           ` Arne Jansen
2011-06-05 17:20                                                             ` Ingo Molnar
2011-06-05 17:42                                                               ` Arne Jansen
2011-06-05 18:59                                                                 ` Ingo Molnar
2011-06-05 19:30                                                                   ` Arne Jansen
2011-06-05 19:44                                                                     ` Ingo Molnar
2011-06-05 20:15                                                                       ` Arne Jansen
2011-06-06  6:56                                                                         ` Arne Jansen
2011-06-06  9:01                                                                         ` Peter Zijlstra
2011-06-06  9:18                                                                           ` Arne Jansen
2011-06-06  9:24                                                                             ` Peter Zijlstra
2011-06-06  9:52                                                                               ` Peter Zijlstra
2011-06-06 10:00                                                                           ` Arne Jansen
2011-06-06 10:26                                                                             ` Peter Zijlstra
2011-06-06 13:25                                                                               ` Peter Zijlstra
2011-06-06 15:04                                                                           ` Ingo Molnar
2011-06-06 15:08                                                                             ` Ingo Molnar
2011-06-06 17:44                                                                               ` Mike Galbraith
2011-06-07  5:20                                                                           ` Mike Galbraith
2011-06-06 13:10                                                                   ` Ingo Molnar
2011-06-06 13:12                                                                     ` Peter Zijlstra
2011-06-06 13:21                                                                       ` Ingo Molnar
2011-06-06 13:31                                                                         ` Peter Zijlstra
2011-06-06  7:34                                                     ` Arne Jansen
2011-06-05 15:34                                                   ` Arne Jansen
2011-06-06  8:38                                                   ` Peter Zijlstra
2011-06-06 14:58                                                     ` Ingo Molnar
2011-06-06 15:09                                                       ` Peter Zijlstra
2011-06-06 15:47                                                         ` Peter Zijlstra
2011-06-06 15:52                                                           ` Ingo Molnar
2011-06-06 16:00                                                             ` Peter Zijlstra
2011-06-06 16:08                                                               ` Ingo Molnar
2011-06-06 16:12                                                                 ` Peter Zijlstra
2011-06-06 16:17                                                                   ` Ingo Molnar
2011-06-06 16:38                                                                     ` Arne Jansen
2011-06-06 16:45                                                                       ` Arne Jansen
2011-06-06 16:53                                                                         ` Peter Zijlstra
2011-06-06 17:07                                                                         ` Ingo Molnar
2011-06-06 17:11                                                                           ` Peter Zijlstra
2011-06-08 15:50                                                                             ` Peter Zijlstra
2011-06-08 19:17                                                                               ` Ingo Molnar
2011-06-08 19:27                                                                                 ` Linus Torvalds
2011-06-08 20:32                                                                                   ` Peter Zijlstra
2011-06-08 20:53                                                                                     ` Linus Torvalds
2011-06-08 20:54                                                                                     ` Thomas Gleixner
2011-06-08 19:45                                                                                 ` Peter Zijlstra
2011-06-08 20:52                                                                                   ` Ingo Molnar
2011-06-08 21:49                                                                                     ` Peter Zijlstra
2011-06-08 21:57                                                                                       ` Thomas Gleixner
2011-06-06 16:44                                                                     ` Peter Zijlstra
2011-06-06 16:50                                                                       ` Peter Zijlstra
2011-06-06 17:13                                                                         ` Ingo Molnar
2011-06-06 17:04                                                                       ` Peter Zijlstra
2011-06-06 17:11                                                                       ` Ingo Molnar
2011-06-06 17:57                                                                         ` Arne Jansen
2011-06-06 18:07                                                                           ` Ingo Molnar
2011-06-06 18:14                                                                             ` Arne Jansen
2011-06-06 18:19                                                                             ` Peter Zijlstra
2011-06-06 22:08                                                                               ` Ingo Molnar
2011-06-03 12:44                       ` [tip:sched/locking] sched: Add p->pi_lock to task_rq_lock() Linus Torvalds
2011-06-03 13:05                         ` Arne Jansen
2011-06-04 21:29                           ` Linus Torvalds
2011-06-04 22:08                             ` Peter Zijlstra
2011-06-04 22:50                               ` Linus Torvalds
2011-06-05  6:01                               ` Arne Jansen
2011-06-05  7:57                                 ` Mike Galbraith
2011-04-05 15:23 ` [PATCH 14/21] sched: Drop rq->lock from first part of wake_up_new_task() Peter Zijlstra
2011-04-14  8:37   ` [tip:sched/locking] " tip-bot for Peter Zijlstra
2011-04-05 15:23 ` [PATCH 15/21] sched: Drop rq->lock from sched_exec() Peter Zijlstra
2011-04-14  8:37   ` [tip:sched/locking] " tip-bot for Peter Zijlstra
2011-04-05 15:23 ` [PATCH 16/21] sched: Remove rq->lock from the first half of ttwu() Peter Zijlstra
2011-04-14  8:38   ` [tip:sched/locking] " tip-bot for Peter Zijlstra
2011-04-05 15:23 ` [PATCH 17/21] sched: Remove rq argument from ttwu_stat() Peter Zijlstra
2011-04-14  8:38   ` [tip:sched/locking] " tip-bot for Peter Zijlstra
2011-04-05 15:23 ` [PATCH 18/21] sched: Rename ttwu_post_activation Peter Zijlstra
2011-04-14  8:39   ` [tip:sched/locking] sched: Rename ttwu_post_activation() to ttwu_do_wakeup() tip-bot for Peter Zijlstra
2011-04-05 15:23 ` [PATCH 19/21] sched: Restructure ttwu some more Peter Zijlstra
2011-04-14  8:39   ` [tip:sched/locking] sched: Restructure ttwu() " tip-bot for Peter Zijlstra
2011-04-05 15:23 ` [PATCH 20/21] sched: Move the second half of ttwu() to the remote cpu Peter Zijlstra
2011-04-14  8:39   ` [tip:sched/locking] " tip-bot for Peter Zijlstra
2011-04-05 15:23 ` [PATCH 21/21] sched: Remove need_migrate_task() Peter Zijlstra
2011-04-14  8:40   ` [tip:sched/locking] " tip-bot for Peter Zijlstra
2011-04-05 15:59 ` [PATCH 00/21] sched: Reduce runqueue lock contention -v6 Peter Zijlstra
2011-04-06 11:00 ` Peter Zijlstra
2011-04-27 16:54 ` Dave Kleikamp

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