Messages in this thread |  | | | Date | Mon, 29 Mar 2010 14:20:21 +0200 | | From | Peter Zijlstra <> | | Subject | [PATCH 0/2] perf: Use LBR for machine/oops debugging |
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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().
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