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Commit 37c00b84 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge git://git.kernel.org/pub/scm/linux/kernel/git/mingo/linux-2.6-sched 

* git://git.kernel.org/pub/scm/linux/kernel/git/mingo/linux-2.6-sched:
  latencytop: change /proc task_struct access method
  latencytop: fix memory leak on latency proc file
  latencytop: fix kernel panic while reading latency proc file
  sched: add declaration of sched_tail to sched.h
  sched: fix signedness warnings in sched.c
  sched: clean up __pick_last_entity() a bit
  sched: remove duplicate code from sched_fair.c
  sched: make early bootup sched_clock() use safer
parents cf3680b9 13d77c37

arch/um/kernel/process.c

+0 −2
Original line number Diff line number Diff line
@@ -128,8 +128,6 @@ void *get_current(void) 
	return current;

}



extern void schedule_tail(struct task_struct *prev);



/*

 * This is called magically, by its address being stuffed in a jmp_buf

 * and being longjmp-d to.

fs/proc/base.c

+11 −16
Original line number Diff line number Diff line
@@ -314,9 +314,12 @@ static int proc_pid_schedstat(struct task_struct *task, char *buffer) 
static int lstats_show_proc(struct seq_file *m, void *v)

{

	int i;

	struct task_struct *task = m->private;

	seq_puts(m, "Latency Top version : v0.1\n");

	struct inode *inode = m->private;

	struct task_struct *task = get_proc_task(inode);



	if (!task)

		return -ESRCH;

	seq_puts(m, "Latency Top version : v0.1\n");

	for (i = 0; i < 32; i++) {

		if (task->latency_record[i].backtrace[0]) {

			int q;
@@ -341,32 +344,24 @@ static int lstats_show_proc(struct seq_file *m, void *v) 
		}



	}

	put_task_struct(task);

	return 0;

}



static int lstats_open(struct inode *inode, struct file *file)

{

	int ret;

	struct seq_file *m;

	struct task_struct *task = get_proc_task(inode);



	ret = single_open(file, lstats_show_proc, NULL);

	if (!ret) {

		m = file->private_data;

		m->private = task;

	}

	return ret;

	return single_open(file, lstats_show_proc, inode);

}



static ssize_t lstats_write(struct file *file, const char __user *buf,

			    size_t count, loff_t *offs)

{

	struct seq_file *m;

	struct task_struct *task;

	struct task_struct *task = get_proc_task(file->f_dentry->d_inode);



	m = file->private_data;

	task = m->private;

	if (!task)

		return -ESRCH;

	clear_all_latency_tracing(task);

	put_task_struct(task);



	return count;

}

include/linux/sched.h

+1 −0
Original line number Diff line number Diff line
@@ -242,6 +242,7 @@ struct task_struct; 


extern void sched_init(void);

extern void sched_init_smp(void);

extern asmlinkage void schedule_tail(struct task_struct *prev);

extern void init_idle(struct task_struct *idle, int cpu);

extern void init_idle_bootup_task(struct task_struct *idle);

kernel/sched.c

+11 −5
Original line number Diff line number Diff line
@@ -668,6 +668,8 @@ const_debug unsigned int sysctl_sched_nr_migrate = 32; 
 */

unsigned int sysctl_sched_rt_period = 1000000;



static __read_mostly int scheduler_running;



/*

 * part of the period that we allow rt tasks to run in us.

 * default: 0.95s
@@ -689,13 +691,15 @@ unsigned long long cpu_clock(int cpu) 
	unsigned long flags;

	struct rq *rq;



	local_irq_save(flags);

	rq = cpu_rq(cpu);

	/*

	 * Only call sched_clock() if the scheduler has already been

	 * initialized (some code might call cpu_clock() very early):

	 */

	if (rq->idle)

	if (unlikely(!scheduler_running))

		return 0;



	local_irq_save(flags);

	rq = cpu_rq(cpu);

	update_rq_clock(rq);

	now = rq->clock;

	local_irq_restore(flags);
@@ -3885,7 +3889,7 @@ pick_next_task(struct rq *rq, struct task_struct *prev) 
asmlinkage void __sched schedule(void)

{

	struct task_struct *prev, *next;

	long *switch_count;

	unsigned long *switch_count;

	struct rq *rq;

	int cpu;
@@ -7284,6 +7288,8 @@ void __init sched_init(void) 
	 * During early bootup we pretend to be a normal task:

	 */

	current->sched_class = &fair_sched_class;



	scheduler_running = 1;

}



#ifdef CONFIG_DEBUG_SPINLOCK_SLEEP

kernel/sched_fair.c

+4 −9
Original line number Diff line number Diff line
@@ -202,17 +202,12 @@ static struct sched_entity *__pick_next_entity(struct cfs_rq *cfs_rq) 


static inline struct sched_entity *__pick_last_entity(struct cfs_rq *cfs_rq)

{

	struct rb_node **link = &cfs_rq->tasks_timeline.rb_node;

	struct sched_entity *se = NULL;

	struct rb_node *parent;

	struct rb_node *last = rb_last(&cfs_rq->tasks_timeline);



	while (*link) {

		parent = *link;

		se = rb_entry(parent, struct sched_entity, run_node);

		link = &parent->rb_right;

	}

	if (!last)

		return NULL;



	return se;

	return rb_entry(last, struct sched_entity, run_node);

}



/**************************************************************