diff options
Diffstat (limited to 'kernel/events/core.c')
| -rw-r--r-- | kernel/events/core.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/kernel/events/core.c b/kernel/events/core.c index 11f6bbe168ab..57aff715039f 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -2818,6 +2818,10 @@ void perf_sched_cb_inc(struct pmu *pmu) /* * This function provides the context switch callback to the lower code * layer. It is invoked ONLY when the context switch callback is enabled. + * + * This callback is relevant even to per-cpu events; for example multi event + * PEBS requires this to provide PID/TID information. This requires we flush + * all queued PEBS records before we context switch to a new task. */ static void perf_pmu_sched_task(struct task_struct *prev, struct task_struct *next, |