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sched: fix debugging

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Revert debugging commit 7ba2e74ab5.
print_cfs_rq_tasks() can induce live-lock if a task is dequeued
during list traversal.

Signed-off-by: Mike Galbraith <efault@gmx.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Mike Galbraith 2008-04-29 12:23:09 +02:00 committed by Ingo Molnar
parent 673a90a1e0
commit d7dcdc11cf
1 changed files with 0 additions and 27 deletions
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27
kernel/sched_fair.c
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@ -1613,30 +1613,6 @@ static const struct sched_class fair_sched_class = {
}; };
#ifdef CONFIG_SCHED_DEBUG #ifdef CONFIG_SCHED_DEBUG
static void
print_cfs_rq_tasks(struct seq_file *m, struct cfs_rq *cfs_rq, int depth)
{
struct sched_entity *se;
if (!cfs_rq)
return;
list_for_each_entry_rcu(se, &cfs_rq->tasks, group_node) {
int i;
for (i = depth; i; i--)
seq_puts(m, " ");
seq_printf(m, "%lu %s %lu\n",
se->load.weight,
entity_is_task(se) ? "T" : "G",
calc_delta_weight(SCHED_LOAD_SCALE, se)
);
if (!entity_is_task(se))
print_cfs_rq_tasks(m, group_cfs_rq(se), depth + 1);
}
}
static void print_cfs_stats(struct seq_file *m, int cpu) static void print_cfs_stats(struct seq_file *m, int cpu)
{ {
struct cfs_rq *cfs_rq; struct cfs_rq *cfs_rq;
@ -1644,9 +1620,6 @@ static void print_cfs_stats(struct seq_file *m, int cpu)
rcu_read_lock(); rcu_read_lock();
for_each_leaf_cfs_rq(cpu_rq(cpu), cfs_rq) for_each_leaf_cfs_rq(cpu_rq(cpu), cfs_rq)
print_cfs_rq(m, cpu, cfs_rq); print_cfs_rq(m, cpu, cfs_rq);
seq_printf(m, "\nWeight tree:\n");
print_cfs_rq_tasks(m, &cpu_rq(cpu)->cfs, 1);
rcu_read_unlock(); rcu_read_unlock();
} }
#endif #endif