Re: [PATCH net-next 2/3] bpf: introduce bpf_perf_event_output() helper

[Alexei Starovoitov]

On 10/22/15 6:59 AM, Peter Zijlstra wrote:
> > +	if (unlikely(event->oncpu != smp_processor_id()))
> > >+		return -EOPNOTSUPP;
> > >+
> > >+	perf_sample_data_init(&sample_data, 0, 0);
> > >+	sample_data.raw = &raw;
> > >+	perf_event_output(event, &sample_data, regs);
> > >+	return 0;
> > >+}
> Note that this function also very much requires event to be local.

correct. that's why there is a dynamic check above to prevent buggy
programs causing issues.


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