diff --git a/arch/x86/events/intel/ds.c b/arch/x86/events/intel/ds.c index 248023f54c87fd3d2c8dc5508cd1e4179770a3fb..e0288d555367e83f925b697cc29312d8c1152dcc 100644 --- a/arch/x86/events/intel/ds.c +++ b/arch/x86/events/intel/ds.c @@ -834,14 +834,24 @@ static inline void pebs_update_threshold(struct cpu_hw_events *cpuc) static void pebs_update_state(bool needed_cb, struct cpu_hw_events *cpuc, struct pmu *pmu) { + /* + * Make sure we get updated with the first PEBS + * event. It will trigger also during removal, but + * that does not hurt: + */ + bool update = cpuc->n_pebs == 1; + if (needed_cb != pebs_needs_sched_cb(cpuc)) { if (!needed_cb) perf_sched_cb_inc(pmu); else perf_sched_cb_dec(pmu); - pebs_update_threshold(cpuc); + update = true; } + + if (update) + pebs_update_threshold(cpuc); } void intel_pmu_pebs_add(struct perf_event *event)