linux-kernel - [PATCH 1/2 -tip] sched: Clean unused fields from struct rq

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Message-ID: <20090318000343.GA2189@hades.domain.com>
Date:	Wed, 18 Mar 2009 00:03:43 +0000
From:	Luis Henriques <henrix@...o.pt>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	linux-kernel@...r.kernel.org
Subject: [PATCH 1/2 -tip] sched: Clean unused fields from struct rq

Since they are used on in statistics and are always set to zero, the following
frields from struct rq have been removed: yld_exp_empty, yld_act_empty and
yld_both_empty.

Signed-off-by: Luis Henriques <henrix@...o.pt>
---
 kernel/sched.c       |    3 ---
 kernel/sched_debug.c |    3 ---
 kernel/sched_stats.h |    5 ++---
 3 files changed, 2 insertions(+), 9 deletions(-)

diff --git a/kernel/sched.c b/kernel/sched.c
index 4000304..289eac2 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -646,9 +646,6 @@ struct rq {
 	/* could above be rq->cfs_rq.exec_clock + rq->rt_rq.rt_runtime ? */
 
 	/* sys_sched_yield() stats */
-	unsigned int yld_exp_empty;
-	unsigned int yld_act_empty;
-	unsigned int yld_both_empty;
 	unsigned int yld_count;
 
 	/* schedule() stats */
diff --git a/kernel/sched_debug.c b/kernel/sched_debug.c
index 2b1260f..1f16606 100644
--- a/kernel/sched_debug.c
+++ b/kernel/sched_debug.c
@@ -287,9 +287,6 @@ static void print_cpu(struct seq_file *m, int cpu)
 #ifdef CONFIG_SCHEDSTATS
 #define P(n) SEQ_printf(m, "  .%-30s: %d\n", #n, rq->n);
 
-	P(yld_exp_empty);
-	P(yld_act_empty);
-	P(yld_both_empty);
 	P(yld_count);
 
 	P(sched_switch);
diff --git a/kernel/sched_stats.h b/kernel/sched_stats.h
index a8f93dd..2e7287a 100644
--- a/kernel/sched_stats.h
+++ b/kernel/sched_stats.h
@@ -26,9 +26,8 @@ static int show_schedstat(struct seq_file *seq, void *v)
 
 		/* runqueue-specific stats */
 		seq_printf(seq,
-		    "cpu%d %u %u %u %u %u %u %u %u %u %llu %llu %lu",
-		    cpu, rq->yld_both_empty,
-		    rq->yld_act_empty, rq->yld_exp_empty, rq->yld_count,
+		    "cpu%d %u %u %u %u %u %u %llu %llu %lu",
+		    cpu, rq->yld_count,
 		    rq->sched_switch, rq->sched_count, rq->sched_goidle,
 		    rq->ttwu_count, rq->ttwu_local,
 		    rq->rq_cpu_time,
-- 
1.6.2


-- 
Luis Henriques
--
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