diff options
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/perf_event.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/kernel/perf_event.c b/kernel/perf_event.c index 251fb955249..53dc2a36211 100644 --- a/kernel/perf_event.c +++ b/kernel/perf_event.c @@ -5002,8 +5002,15 @@ inherit_event(struct perf_event *parent_event, else child_event->state = PERF_EVENT_STATE_OFF; - if (parent_event->attr.freq) - child_event->hw.sample_period = parent_event->hw.sample_period; + if (parent_event->attr.freq) { + u64 sample_period = parent_event->hw.sample_period; + struct hw_perf_event *hwc = &child_event->hw; + + hwc->sample_period = sample_period; + hwc->last_period = sample_period; + + atomic64_set(&hwc->period_left, sample_period); + } child_event->overflow_handler = parent_event->overflow_handler; |