Re: [PATCH 0/2] perf: Use LBR for machine/oops debugging

[Andi Kleen]

Peter Zijlstra <a.p.zijlstra@xxxxxxxxx> writes:

> The LBRs are relatively cheap to keep enabled and provide some history
> to OOPSen, also some CPUs are reported to keep them over soft-reset,
> which allows us to use them to debug things like tripple faults.
>
> Therefore introduce a boot option: lbr_debug=on, which always enable
> the LBRs and will print the LBRs on CPU init and die().


die is too late. they will only contain the oops code then.

-Andi

-- 
ak@xxxxxxxxxxxxxxx -- Speaking for myself only.
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