From: Peter Zijlstra <a.p.zijlstra@chello.nl>
To: Ingo Molnar <mingo@elte.hu>
Cc: Mike Galbraith <efault@gmx.de>,
linux-kernel@vger.kernel.org,
Peter Zijlstra <a.p.zijlstra@chello.nl>
Subject: [PATCH 09/12] sched: Move kthread_bind() back to kthread.c
Date: Wed, 16 Dec 2009 18:04:39 +0100 [thread overview]
Message-ID: <20091216170518.039524041@chello.nl> (raw)
In-Reply-To: 20091216170430.073353839@chello.nl
[-- Attachment #1: foo5.patch --]
[-- Type: text/plain, Size: 2631 bytes --]
Since kthread_bind() lost its dependencies on sched.c, move it back
where it came from.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
---
kernel/kthread.c | 23 +++++++++++++++++++++++
kernel/sched.c | 26 --------------------------
2 files changed, 23 insertions(+), 26 deletions(-)
Index: linux-2.6/kernel/kthread.c
===================================================================
--- linux-2.6.orig/kernel/kthread.c
+++ linux-2.6/kernel/kthread.c
@@ -150,6 +150,29 @@ struct task_struct *kthread_create(int (
EXPORT_SYMBOL(kthread_create);
/**
+ * kthread_bind - bind a just-created kthread to a cpu.
+ * @p: thread created by kthread_create().
+ * @cpu: cpu (might not be online, must be possible) for @k to run on.
+ *
+ * Description: This function is equivalent to set_cpus_allowed(),
+ * except that @cpu doesn't need to be online, and the thread must be
+ * stopped (i.e., just returned from kthread_create()).
+ */
+void kthread_bind(struct task_struct *p, unsigned int cpu)
+{
+ /* Must have done schedule() in kthread() before we set_task_cpu */
+ if (!wait_task_inactive(p, TASK_UNINTERRUPTIBLE)) {
+ WARN_ON(1);
+ return;
+ }
+
+ p->cpus_allowed = cpumask_of_cpu(cpu);
+ p->rt.nr_cpus_allowed = 1;
+ p->flags |= PF_THREAD_BOUND;
+}
+EXPORT_SYMBOL(kthread_bind);
+
+/**
* kthread_stop - stop a thread created by kthread_create().
* @k: thread created by kthread_create().
*
Index: linux-2.6/kernel/sched.c
===================================================================
--- linux-2.6.orig/kernel/sched.c
+++ linux-2.6/kernel/sched.c
@@ -2002,32 +2002,6 @@ static inline void check_class_changed(s
p->sched_class->prio_changed(rq, p, oldprio, running);
}
-/**
- * kthread_bind - bind a just-created kthread to a cpu.
- * @p: thread created by kthread_create().
- * @cpu: cpu (might not be online, must be possible) for @k to run on.
- *
- * Description: This function is equivalent to set_cpus_allowed(),
- * except that @cpu doesn't need to be online, and the thread must be
- * stopped (i.e., just returned from kthread_create()).
- *
- * Function lives here instead of kthread.c because it messes with
- * scheduler internals which require locking.
- */
-void kthread_bind(struct task_struct *p, unsigned int cpu)
-{
- /* Must have done schedule() in kthread() before we set_task_cpu */
- if (!wait_task_inactive(p, TASK_UNINTERRUPTIBLE)) {
- WARN_ON(1);
- return;
- }
-
- p->cpus_allowed = cpumask_of_cpu(cpu);
- p->rt.nr_cpus_allowed = 1;
- p->flags |= PF_THREAD_BOUND;
-}
-EXPORT_SYMBOL(kthread_bind);
-
#ifdef CONFIG_SMP
/*
* Is this task likely cache-hot:
--
next prev parent reply other threads:[~2009-12-16 17:09 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-12-16 17:04 [PATCH 00/12] sched: cleanup set_task_cpu() issues Peter Zijlstra
2009-12-16 17:04 ` [PATCH 01/12] sched: Mark boot-cpu active before smp_init() Peter Zijlstra
2009-12-16 18:36 ` [tip:sched/urgent] " tip-bot for Peter Zijlstra
2009-12-16 17:04 ` [PATCH 02/12] sched: Fix set_cpu_active() in cpu_down() Peter Zijlstra
2009-12-16 17:56 ` Peter Zijlstra
2009-12-16 18:36 ` [tip:sched/urgent] " tip-bot for Xiaotian Feng
2009-12-16 17:04 ` [PATCH 03/12] sched: Fix task_hot() test order Peter Zijlstra
2009-12-16 18:37 ` [tip:sched/urgent] " tip-bot for Peter Zijlstra
2009-12-16 17:04 ` [PATCH 04/12] sched: select_task_rq_fair() must honour SD_LOAD_BALANCE Peter Zijlstra
2009-12-16 18:37 ` [tip:sched/urgent] sched: Select_task_rq_fair() " tip-bot for Peter Zijlstra
2009-12-16 17:04 ` [PATCH 05/12] sched: Use TASK_WAKING for fork wakups Peter Zijlstra
2009-12-16 18:37 ` [tip:sched/urgent] " tip-bot for Peter Zijlstra
2009-12-16 17:04 ` [PATCH 06/12] sched: Ensure set_task_cpu() is never called on blocked tasks Peter Zijlstra
2009-12-16 18:37 ` [tip:sched/urgent] " tip-bot for Peter Zijlstra
2009-12-17 5:09 ` [tip:sched/urgent] sched: Make warning less noisy tip-bot for Ingo Molnar
2009-12-16 17:04 ` [PATCH 07/12] sched: Fix sched_exec() balancing Peter Zijlstra
2009-12-16 18:38 ` [tip:sched/urgent] " tip-bot for Peter Zijlstra
2009-12-16 17:04 ` [PATCH 08/12] sched: Fix select_task_rq() vs hotplug issues Peter Zijlstra
2009-12-16 18:38 ` [tip:sched/urgent] " tip-bot for Peter Zijlstra
2009-12-16 17:04 ` Peter Zijlstra [this message]
2009-12-16 18:38 ` [tip:sched/urgent] sched: Move kthread_bind() back to kthread.c tip-bot for Peter Zijlstra
2009-12-16 17:04 ` [PATCH 10/12] sched: Add pre and post wakeup hooks Peter Zijlstra
2009-12-16 18:38 ` [tip:sched/urgent] " tip-bot for Peter Zijlstra
2009-12-16 17:04 ` [PATCH 11/12] sched: Remove the cfs_rq dependency from set_task_cpu() Peter Zijlstra
2009-12-16 18:39 ` [tip:sched/urgent] " tip-bot for Peter Zijlstra
2009-12-16 17:04 ` [PATCH 12/12] sched: Simplify set_task_cpu() Peter Zijlstra
2009-12-16 18:39 ` [tip:sched/urgent] " tip-bot for Peter Zijlstra
2009-12-16 21:17 ` [PATCH 13/12] sched: remove debug check Peter Zijlstra
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