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cgroups: add cpu_relax() calls in css_tryget() and cgroup_clear_css_refs()
[safe/jmp/linux-2.6]
/
kernel
/
kthread.c
diff --git
a/kernel/kthread.c
b/kernel/kthread.c
index
ac3fb73
..
4fbc456
100644
(file)
--- a/
kernel/kthread.c
+++ b/
kernel/kthread.c
@@
-13,6
+13,7
@@
#include <linux/file.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/file.h>
#include <linux/module.h>
#include <linux/mutex.h>
+#include <trace/sched.h>
#define KTHREAD_NICE_LEVEL (-5)
#define KTHREAD_NICE_LEVEL (-5)
@@
-20,6
+21,9
@@
static DEFINE_SPINLOCK(kthread_create_lock);
static LIST_HEAD(kthread_create_list);
struct task_struct *kthreadd_task;
static LIST_HEAD(kthread_create_list);
struct task_struct *kthreadd_task;
+DEFINE_TRACE(sched_kthread_stop);
+DEFINE_TRACE(sched_kthread_stop_ret);
+
struct kthread_create_info
{
/* Information passed to kthread() from kthreadd. */
struct kthread_create_info
{
/* Information passed to kthread() from kthreadd. */
@@
-106,7
+110,7
@@
static void create_kthread(struct kthread_create_info *create)
*/
sched_setscheduler(create->result, SCHED_NORMAL, ¶m);
set_user_nice(create->result, KTHREAD_NICE_LEVEL);
*/
sched_setscheduler(create->result, SCHED_NORMAL, ¶m);
set_user_nice(create->result, KTHREAD_NICE_LEVEL);
- set_cpus_allowed
(create->result, CPU_MASK_ALL
);
+ set_cpus_allowed
_ptr(create->result, CPU_MASK_ALL_PTR
);
}
complete(&create->done);
}
}
complete(&create->done);
}
@@
-171,12
+175,11
@@
EXPORT_SYMBOL(kthread_create);
*/
void kthread_bind(struct task_struct *k, unsigned int cpu)
{
*/
void kthread_bind(struct task_struct *k, unsigned int cpu)
{
- if (k->state != TASK_UNINTERRUPTIBLE) {
+ /* Must have done schedule() in kthread() before we set_task_cpu */
+ if (!wait_task_inactive(k, TASK_UNINTERRUPTIBLE)) {
WARN_ON(1);
return;
}
WARN_ON(1);
return;
}
- /* Must have done schedule() in kthread() before we set_task_cpu */
- wait_task_inactive(k);
set_task_cpu(k, cpu);
k->cpus_allowed = cpumask_of_cpu(cpu);
k->rt.nr_cpus_allowed = 1;
set_task_cpu(k, cpu);
k->cpus_allowed = cpumask_of_cpu(cpu);
k->rt.nr_cpus_allowed = 1;
@@
-206,6
+209,8
@@
int kthread_stop(struct task_struct *k)
/* It could exit after stop_info.k set, but before wake_up_process. */
get_task_struct(k);
/* It could exit after stop_info.k set, but before wake_up_process. */
get_task_struct(k);
+ trace_sched_kthread_stop(k);
+
/* Must init completion *before* thread sees kthread_stop_info.k */
init_completion(&kthread_stop_info.done);
smp_wmb();
/* Must init completion *before* thread sees kthread_stop_info.k */
init_completion(&kthread_stop_info.done);
smp_wmb();
@@
-221,6
+226,8
@@
int kthread_stop(struct task_struct *k)
ret = kthread_stop_info.err;
mutex_unlock(&kthread_stop_lock);
ret = kthread_stop_info.err;
mutex_unlock(&kthread_stop_lock);
+ trace_sched_kthread_stop_ret(ret);
+
return ret;
}
EXPORT_SYMBOL(kthread_stop);
return ret;
}
EXPORT_SYMBOL(kthread_stop);
@@
-233,7
+240,7
@@
int kthreadd(void *unused)
set_task_comm(tsk, "kthreadd");
ignore_signals(tsk);
set_user_nice(tsk, KTHREAD_NICE_LEVEL);
set_task_comm(tsk, "kthreadd");
ignore_signals(tsk);
set_user_nice(tsk, KTHREAD_NICE_LEVEL);
- set_cpus_allowed
(tsk, CPU_MASK_ALL
);
+ set_cpus_allowed
_ptr(tsk, CPU_MASK_ALL_PTR
);
current->flags |= PF_NOFREEZE | PF_FREEZER_NOSIG;
current->flags |= PF_NOFREEZE | PF_FREEZER_NOSIG;