Messages in this thread | | | Subject | Re: [PATCH 0/2] perf: Use LBR for machine/oops debugging | From | Andi Kleen <> | Date | Mon, 29 Mar 2010 15:08:03 +0200 |
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Peter Zijlstra <a.p.zijlstra@chello.nl> 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@linux.intel.com -- Speaking for myself only.
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