The following commit has been merged into the sched/core branch of tip:
Commit-ID: e79b3ddad6790aabead5fb775456a5b0599e97ee
Gitweb: https://git.kernel.org/tip/e79b3ddad6790aabead5fb775456a5b0599e97ee
Author: Frederic Weisbecker <frederic@xxxxxxxxxx>
AuthorDate: Wed, 16 Oct 2019 04:57:00 +02:00
Committer: Ingo Molnar <mingo@xxxxxxxxxx>
CommitterDate: Tue, 29 Oct 2019 10:01:19 +01:00
leds: Use vtime aware kcpustat accessor to fetch CPUTIME_SYSTEM
Now that we have a vtime safe kcpustat accessor for CPUTIME_SYSTEM, use
it to start fixing frozen kcpustat values on nohz_full CPUs.
Reported-by: Yauheni Kaliuta <yauheni.kaliuta@xxxxxxxxxx>
Signed-off-by: Frederic Weisbecker <frederic@xxxxxxxxxx>
Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Cc: Jacek Anaszewski <jacek.anaszewski@xxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Pavel Machek <pavel@xxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Rafael J . Wysocki <rjw@xxxxxxxxxxxxx>
Cc: Rik van Riel <riel@xxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Viresh Kumar <viresh.kumar@xxxxxxxxxx>
Cc: Wanpeng Li <wanpengli@xxxxxxxxxxx>
Link: https://lkml.kernel.org/r/20191016025700.31277-15-frederic@xxxxxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
drivers/leds/trigger/ledtrig-activity.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/leds/trigger/ledtrig-activity.c b/drivers/leds/trigger/ledtrig-activity.c
index 6a72b7e..ddfc5ed 100644
--- a/drivers/leds/trigger/ledtrig-activity.c
+++ b/drivers/leds/trigger/ledtrig-activity.c
@@ -59,7 +59,7 @@ static void led_activity_function(struct timer_list *t)
for_each_possible_cpu(i) {
curr_used += kcpustat_cpu(i).cpustat[CPUTIME_USER]
+ kcpustat_cpu(i).cpustat[CPUTIME_NICE]
- + kcpustat_cpu(i).cpustat[CPUTIME_SYSTEM]
+ + kcpustat_field(&kcpustat_cpu(i), CPUTIME_SYSTEM, i)
+ kcpustat_cpu(i).cpustat[CPUTIME_SOFTIRQ]
+ kcpustat_cpu(i).cpustat[CPUTIME_IRQ];
cpus++;
|