sched: fix debugging

Revert debugging commit 7ba2e74ab5a0518bc953042952dd165724bc70c9.
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>

1 files changed, 0 insertions, 27 deletions

diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c
index 1d5f35b4636e..d99e01f6929a 100644
--- a/kernel/sched_fair.c
+++ b/kernel/sched_fair.c
@@ -1613,30 +1613,6 @@ static const struct sched_class fair_sched_class = {
 };
 
 #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)
 {
         struct cfs_rq *cfs_rq;
@@ -1644,9 +1620,6 @@ static void print_cfs_stats(struct seq_file *m, int cpu)
         rcu_read_lock();
         for_each_leaf_cfs_rq(cpu_rq(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();
 }
 #endif