> +void perf_event_munmap(void) > +{ > + struct perf_cpu_context *cpuctx; > + unsigned long flags; > + struct pmu *pmu; > + > + local_irq_save(flags); > + list_for_each_entry(cpuctx, this_cpu_ptr(&sched_cb_list), > sched_cb_entry) {
Would be good have a fast path here that checks for the list being empty without disabling the interrupts. munmap can be somewhat hot. I think it's ok to make it slower with perf running, but we shouldn't impact it without perf. -Andi