From 1b9f19c2125dd1021b9327111dc40b14b557ee12 Mon Sep 17 00:00:00 2001
From: Ingo Molnar <mingo@elte.hu>
Date: Mon, 9 Jul 2007 18:51:59 +0200
Subject: [PATCH] sched: turn on the use of unstable events
make use of sched-clock-unstable events.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---
kernel/sched.c | 21 ++++++++++++++-------
1 file changed, 14 insertions(+), 7 deletions(-)
diff --git a/kernel/sched.c b/kernel/sched.c
index 6150cd70f4484..2d23450e76145 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -67,13 +67,6 @@ unsigned long long __attribute__((weak)) sched_clock(void)
return (unsigned long long)jiffies * (1000000000 / HZ);
}
-/*
- * CPU frequency is/was unstable - start new by setting prev_clock_raw:
- */
-void sched_clock_unstable_event(void)
-{
-}
-
/*
* Convert user-nice values [ -20 ... 0 ... 19 ]
* to static priority [ MAX_RT_PRIO..MAX_PRIO-1 ],
@@ -629,6 +622,20 @@ static inline struct rq *this_rq_lock(void)
return rq;
}
+/*
+ * CPU frequency is/was unstable - start new by setting prev_clock_raw:
+ */
+void sched_clock_unstable_event(void)
+{
+ unsigned long flags;
+ struct rq *rq;
+
+ rq = task_rq_lock(current, &flags);
+ rq->prev_clock_raw = sched_clock();
+ rq->clock_unstable_events++;
+ task_rq_unlock(rq, &flags);
+}
+
/*
* resched_task - mark a task 'to be rescheduled now'.
*
--
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