[PATCH -rt 3/9] Fix jiffies wrap issue in update_times

In prior -rt verisons the last_tick value was called wall_jiffies 
and was initialized in this same way as below. If this value isn't
initialized the calc_load function gets skewed for several minutes
right after boot up. Skewed meaning always zero.

Signed-off-by: Daniel Walker <[email protected]>

---
 kernel/timer.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Index: linux-2.6.22/kernel/timer.c
===================================================================
--- linux-2.6.22.orig/kernel/timer.c
+++ linux-2.6.22/kernel/timer.c
@@ -987,7 +987,7 @@ void run_local_timers(void)
  */
 static inline void update_times(void)
 {
-	static unsigned long last_tick;
+	static unsigned long last_tick = INITIAL_JIFFIES;
 	unsigned long ticks, flags;
 
 	/*

-- 
-
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---

• Follow-Ups:
  • Re: [PATCH -rt 3/9] Fix jiffies wrap issue in update_times
    • From: Ingo Molnar <[email protected]>

• References:
  • [PATCH -rt 1/9] preempt rcu: check for underflow
    • From: Daniel Walker <[email protected]>

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