Re: [RFC] bpf: lbr: enable reading LBR from tracing bpf programs

[Peter Zijlstra]

On Thu, Aug 19, 2021 at 06:22:07PM +0000, Song Liu wrote:

> > And if we're going to be adding new pmu::methods then I figure one that
> > does the whole sample state might be more useful.
> 
> What do you mean by "whole sample state"? To integrate with exiting
> perf_sample_data, like perf_output_sample()?

Yeah, the PMI can/does set more than data->br_stack, but I'm now
thinking that without an actual PMI, much of that will not be possible.
br_stack is special here.

Oh well, carry on I suppose.