C++ (Cpp) rcu_gp_in_progress Beispiele

Beispiel #1

Datei: rcutree.c Projekt: mjduddin/B14CKB1RD_kernel_m8

static void print_other_cpu_stall(struct rcu_state *rsp)
{
	int cpu;
	long delta;
	unsigned long flags;
	int ndetected = 0;
	struct rcu_node *rnp = rcu_get_root(rsp);

	

	raw_spin_lock_irqsave(&rnp->lock, flags);
	delta = jiffies - rsp->jiffies_stall;
	if (delta < RCU_STALL_RAT_DELAY || !rcu_gp_in_progress(rsp)) {
		raw_spin_unlock_irqrestore(&rnp->lock, flags);
		return;
	}
	rsp->jiffies_stall = jiffies + 3 * jiffies_till_stall_check() + 3;
	raw_spin_unlock_irqrestore(&rnp->lock, flags);

	printk(KERN_ERR "INFO: %s detected stalls on CPUs/tasks:",
	       rsp->name);
	print_cpu_stall_info_begin();
	rcu_for_each_leaf_node(rsp, rnp) {
		raw_spin_lock_irqsave(&rnp->lock, flags);
		ndetected += rcu_print_task_stall(rnp);
		raw_spin_unlock_irqrestore(&rnp->lock, flags);
		if (rnp->qsmask == 0)
			continue;
		for (cpu = 0; cpu <= rnp->grphi - rnp->grplo; cpu++)
			if (rnp->qsmask & (1UL << cpu)) {
				print_cpu_stall_info(rsp, rnp->grplo + cpu);
				ndetected++;
			}
	}

Beispiel #2

Datei: rcutree.c Projekt: mjduddin/B14CKB1RD_kernel_m8

static int
cpu_needs_another_gp(struct rcu_state *rsp, struct rcu_data *rdp)
{
	return *rdp->nxttail[RCU_DONE_TAIL +
			     ACCESS_ONCE(rsp->completed) != rdp->completed] &&
	       !rcu_gp_in_progress(rsp);
}

Beispiel #3

static void print_other_cpu_stall(struct rcu_state *rsp)
{
	int cpu;
	long delta;
	unsigned long flags;
	struct rcu_node *rnp = rcu_get_root(rsp);

	

	spin_lock_irqsave(&rnp->lock, flags);
	delta = jiffies - rsp->jiffies_stall;
	if (delta < RCU_STALL_RAT_DELAY || !rcu_gp_in_progress(rsp)) {
		spin_unlock_irqrestore(&rnp->lock, flags);
		return;
	}
	rsp->jiffies_stall = jiffies + RCU_SECONDS_TILL_STALL_RECHECK;

	
	rcu_print_task_stall(rnp);
	spin_unlock_irqrestore(&rnp->lock, flags);

	

	printk(KERN_ERR "INFO: RCU detected CPU stalls:");
	rcu_for_each_leaf_node(rsp, rnp) {
		rcu_print_task_stall(rnp);
		if (rnp->qsmask == 0)
			continue;
		for (cpu = 0; cpu <= rnp->grphi - rnp->grplo; cpu++)
			if (rnp->qsmask & (1UL << cpu))
				printk(" %d", rnp->grplo + cpu);
	}

Beispiel #4

Datei: rcutree.c Projekt: flwh/Alcatel_OT_985_kernel

static void print_other_cpu_stall(struct rcu_state *rsp)
{
	int cpu;
	long delta;
	unsigned long flags;
	struct rcu_node *rnp = rcu_get_root(rsp);

	/* Only let one CPU complain about others per time interval. */

	raw_spin_lock_irqsave(&rnp->lock, flags);
	delta = jiffies - rsp->jiffies_stall;
	if (delta < RCU_STALL_RAT_DELAY || !rcu_gp_in_progress(rsp)) {
		raw_spin_unlock_irqrestore(&rnp->lock, flags);
		return;
	}
	rsp->jiffies_stall = jiffies + RCU_SECONDS_TILL_STALL_RECHECK;

	/*
	 * Now rat on any tasks that got kicked up to the root rcu_node
	 * due to CPU offlining.
	 */
	rcu_print_task_stall(rnp);
	raw_spin_unlock_irqrestore(&rnp->lock, flags);

	/* OK, time to rat on our buddy... */

	printk(KERN_ERR "INFO: %s detected stalls on CPUs/tasks: {",
	       rsp->name);
	rcu_for_each_leaf_node(rsp, rnp) {
		raw_spin_lock_irqsave(&rnp->lock, flags);
		rcu_print_task_stall(rnp);
		raw_spin_unlock_irqrestore(&rnp->lock, flags);
		if (rnp->qsmask == 0)
			continue;
		for (cpu = 0; cpu <= rnp->grphi - rnp->grplo; cpu++)
			if (rnp->qsmask & (1UL << cpu))
				printk(" %d", rnp->grplo + cpu);
	}

Beispiel #5

Datei: rcutree.c Projekt: flwh/Alcatel_OT_985_kernel

static int
cpu_needs_another_gp(struct rcu_state *rsp, struct rcu_data *rdp)
{
	return *rdp->nxttail[RCU_DONE_TAIL] && !rcu_gp_in_progress(rsp);
}