Messages in this thread | | | Date | Thu, 10 Dec 2015 21:49:33 +0100 (CET) | From | Thomas Gleixner <> | Subject | Re: [PATCH 1/1] Fix int1 recursion when no perf_bp_event is registeredy |
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On Thu, 10 Dec 2015, Andy Lutomirski wrote: > On brief inspection, this smells like a microcode bug. Can you send > /proc/cpuinfo output? > > If this is the issue, I'm not sure we want to be in the business of > working around localized microcode bugs and, if we do, then I think we > should explicitly detect the bug and log about it.
I think we should handle such stuff gracefully. Yes, we should log it and we also should check what the contents of the debug registers are.
If dr7 has a break point enabled w/o perf having one installed then we know that someone did a horrible hackery ....
Thanks,
tglx
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