diff options
| -rw-r--r-- | kernel/sched_clock.c | 25 |
1 files changed, 16 insertions, 9 deletions
diff --git a/kernel/sched_clock.c b/kernel/sched_clock.c index 55fca1e9e12..ee7cce5029c 100644 --- a/kernel/sched_clock.c +++ b/kernel/sched_clock.c @@ -124,7 +124,7 @@ static int check_max(struct sched_clock_data *scd) * - filter out backward motion * - use jiffies to generate a min,max window to clip the raw values */ -static void __update_sched_clock(struct sched_clock_data *scd, u64 now) +static void __update_sched_clock(struct sched_clock_data *scd, u64 now, u64 *time) { unsigned long now_jiffies = jiffies; long delta_jiffies = now_jiffies - scd->tick_jiffies; @@ -162,8 +162,12 @@ static void __update_sched_clock(struct sched_clock_data *scd, u64 now) if (unlikely(clock < min_clock)) clock = min_clock; - scd->prev_raw = now; - scd->clock = clock; + if (time) + *time = clock; + else { + scd->prev_raw = now; + scd->clock = clock; + } } static void lock_double_clock(struct sched_clock_data *data1, @@ -207,15 +211,18 @@ u64 sched_clock_cpu(int cpu) now -= scd->tick_gtod; __raw_spin_unlock(&my_scd->lock); + + __update_sched_clock(scd, now, &clock); + + __raw_spin_unlock(&scd->lock); + } else { __raw_spin_lock(&scd->lock); + __update_sched_clock(scd, now, NULL); + clock = scd->clock; + __raw_spin_unlock(&scd->lock); } - __update_sched_clock(scd, now); - clock = scd->clock; - - __raw_spin_unlock(&scd->lock); - return clock; } @@ -234,7 +241,7 @@ void sched_clock_tick(void) now_gtod = ktime_to_ns(ktime_get()); __raw_spin_lock(&scd->lock); - __update_sched_clock(scd, now); + __update_sched_clock(scd, now, NULL); /* * update tick_gtod after __update_sched_clock() because that will * already observe 1 new jiffy; adding a new tick_gtod to that would |