linux-kernel - [PATCH 2/5] sched: hide cfs_rq of autogroup if autogroup is disabled

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Date:	Sun, 20 Feb 2011 15:08:13 +0800
From:	Yong Zhang <yong.zhang0@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	Ingo Molnar <mingo@...e.hu>, Peter Zijlstra <peterz@...radead.org>,
	Mike Galbraith <efault@....de>
Subject: [PATCH 2/5] sched: hide cfs_rq of autogroup if autogroup is disabled

When autogroup is disabled, sched_debug will show
all of the cfs_rq of autogroup by name "cfs_rq[0]:"
Actually that doesn't make sense and not necessary
to be showed.

Signed-off-by: Yong Zhang <yong.zhang0@...il.com>
Cc: Ingo Molnar <mingo@...e.hu>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Mike Galbraith <efault@....de>
---
 kernel/sched_debug.c |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)

diff --git a/kernel/sched_debug.c b/kernel/sched_debug.c
index eb6cb8e..121e2a2 100644
--- a/kernel/sched_debug.c
+++ b/kernel/sched_debug.c
@@ -169,6 +169,12 @@ void print_cfs_rq(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq)
 	struct sched_entity *last;
 	unsigned long flags;
 
+#ifdef CONFIG_SCHED_AUTOGROUP
+	int enabled = ACCESS_ONCE(sysctl_sched_autogroup_enabled);
+
+	if (task_group_is_autogroup(cfs_rq->tg) && !enabled)
+		return;
+#endif
 #ifdef CONFIG_FAIR_GROUP_SCHED
 	SEQ_printf(m, "\ncfs_rq[%d]:%s\n", cpu, task_group_path(cfs_rq->tg));
 #else
-- 
1.7.1

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