linux-kernel - [PATCH 6/7] sched: Delete rq::skip_clock

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Message-ID: <20140920165146.16299.20907.stgit@localhost>
Date:	Sat, 20 Sep 2014 20:51:46 +0400
From:	Kirill Tkhai <tkhai@...dex.ru>
To:	linux-kernel@...r.kernel.org
Cc:	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...hat.com>,
	Kirill Tkhai <ktkhai@...allels.com>
Subject: [PATCH 6/7] sched: Delete rq::skip_clock_update == -1

From: Kirill Tkhai <ktkhai@...allels.com>

Idle class task is always queued, so we can safely remove "-1" case here.

Signed-off-by: Kirill Tkhai <ktkhai@...allels.com>
---
 kernel/sched/core.c |    2 +-
 kernel/sched/rt.c   |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index a40d6e1..7d0d023 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -2812,7 +2812,7 @@ static void __sched __schedule(void)
 		switch_count = &prev->nvcsw;
 	}
 
-	if (task_on_rq_queued(prev) || rq->skip_clock_update < 0)
+	if (task_on_rq_queued(prev))
 		update_rq_clock(rq);
 
 	next = pick_next_task(rq, prev);
diff --git a/kernel/sched/rt.c b/kernel/sched/rt.c
index de356b0..828eda0 100644
--- a/kernel/sched/rt.c
+++ b/kernel/sched/rt.c
@@ -835,7 +835,7 @@ static int do_sched_rt_period_timer(struct rt_bandwidth *rt_b, int overrun)
 				 * lest wakeup -> unthrottle time accumulate.
 				 */
 				if (rt_rq->rt_nr_running && rq->curr == rq->idle)
-					rq->skip_clock_update = -1;
+					rq->skip_clock_update = 0;
 			}
 			if (rt_rq->rt_time || rt_rq->rt_nr_running)
 				idle = 0;

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