linux-kernel - [PATCH] sched: replace rq->bkl_count with rq->rq_sched_info.bkl

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Date:	Fri, 14 Jan 2011 15:57:39 +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>
Subject: [PATCH] sched: replace rq->bkl_count with rq->rq_sched_info.bkl_count

Now rq->rq_sched_info.bkl_count is not used for rq, scroll
rq->bkl_count into it. Thus we can save some space for rq.

Signed-off-by: Yong Zhang <yong.zhang0@...il.com>
Cc: Ingo Molnar <mingo@...e.hu>
Cc: Peter Zijlstra <peterz@...radead.org>
---
 kernel/sched.c       |    5 +----
 kernel/sched_debug.c |    4 +++-
 2 files changed, 4 insertions(+), 5 deletions(-)

diff --git a/kernel/sched.c b/kernel/sched.c
index ea3e5ef..3d6df21 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -553,9 +553,6 @@ struct rq {
 	/* try_to_wake_up() stats */
 	unsigned int ttwu_count;
 	unsigned int ttwu_local;
-
-	/* BKL stats */
-	unsigned int bkl_count;
 #endif
 };
 
@@ -3887,7 +3884,7 @@ static inline void schedule_debug(struct task_struct *prev)
 	schedstat_inc(this_rq(), sched_count);
 #ifdef CONFIG_SCHEDSTATS
 	if (unlikely(prev->lock_depth >= 0)) {
-		schedstat_inc(this_rq(), bkl_count);
+		schedstat_inc(this_rq(), rq_sched_info.bkl_count);
 		schedstat_inc(prev, sched_info.bkl_count);
 	}
 #endif
diff --git a/kernel/sched_debug.c b/kernel/sched_debug.c
index 1dfae3d..8ee0aa7 100644
--- a/kernel/sched_debug.c
+++ b/kernel/sched_debug.c
@@ -262,9 +262,11 @@ static void print_cpu(struct seq_file *m, int cpu)
 	P(ttwu_count);
 	P(ttwu_local);
 
-	P(bkl_count);
+	SEQ_printf(m, "  .%-30s: %d\n", "bkl_count",
+				rq->rq_sched_info.bkl_count);
 
 #undef P
+#undef P64
 #endif
 	print_cfs_stats(m, cpu);
 	print_rt_stats(m, cpu);
-- 
1.7.0.4

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