linux-kernel - [PATCH 8/8] sched: document the difference between nr_running and h_nr

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Date:	Sun, 18 Aug 2013 16:25:22 +0800
From:	Lei Wen <leiwen@...vell.com>
To:	Paul Turner <pjt@...gle.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...e.hu>, <mingo@...hat.com>,
	<leiwen@...vell.com>, <linux-kernel@...r.kernel.org>
Subject: [PATCH 8/8] sched: document the difference between nr_running and h_nr_running

Signed-off-by: Lei Wen <leiwen@...vell.com>
---
 kernel/sched/sched.h |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)

diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h
index ef0a7b2..b8f0924 100644
--- a/kernel/sched/sched.h
+++ b/kernel/sched/sched.h
@@ -248,6 +248,12 @@ struct cfs_bandwidth { };
 /* CFS-related fields in a runqueue */
 struct cfs_rq {
 	struct load_weight load;
+	/*
+	 * The difference between nr_running and h_nr_running is:
+	 * nr_running:   present how many entity would take part in the sharing
+	 *               the cpu power of that cfs_rq
+	 * h_nr_running: present how many tasks in current cfs runqueue
+	 */
 	unsigned int nr_running, h_nr_running;
 
 	u64 exec_clock;
-- 
1.7.5.4

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