Messages in this thread | | | Date | Wed, 5 Feb 2014 20:53:05 +0100 | From | Peter Zijlstra <> | Subject | Re: [PATCH] perf,x86,p6: Add userspace RDPMC quirk for P6 |
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On Wed, Feb 05, 2014 at 02:29:36PM -0500, Vince Weaver wrote: > from the document you linked it looks like it was fixed by the Pentium > Pro stepping sB1 (6.1.9).
OK, I'll add a boot_cpu_data.x86_mask >= 0xB1 test.
> Has someone actually hit this bug? People used PAPI/perfctr on these > machines for years, and it uses rdpmc by default so I would think it would > show up if it were an issue. I should check the perfctr code to see if it > had some sort of check.
Yeah, the reporter had a boot fail due to this.
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