[no subject]

From: Dong Zhu
Date: Mon Jun 10 2013 - 03:09:27 EST

we can start/stop data collection by using :
echo [1|0] > /proc/timer_stats
when we stop the data collection,hrtimer will not update the statistics
for a timer any more,but we could still check the timer usage
statistics,unfortunately the data is not the latest, the inaccurate data
might make us confusing. So the purpose of this patch is to reset the
entries once disable operation is executed.In this way we will never
see the inaccurate timer usage statistics.

Signed-off-by: Dong Zhu <bluezhudong@xxxxxxxxx>
kernel/time/timer_stats.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/kernel/time/timer_stats.c b/kernel/time/timer_stats.c
index 0b537f2..43f05e7 100644
--- a/kernel/time/timer_stats.c
+++ b/kernel/time/timer_stats.c
@@ -371,6 +371,7 @@ static ssize_t tstats_write(struct file *file, const char __user *buf,
switch (ctl[0]) {
case '0':
if (timer_stats_active) {
+ reset_entries();
timer_stats_active = 0;
time_stop = ktime_get();

Best Regards,
Dong Zhu
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