Re: [PATCH] perf,x86,p6: Add userspace RDPMC quirk for P6

From: Peter Zijlstra
Date: Wed Feb 05 2014 - 14:20:32 EST


On Wed, Feb 05, 2014 at 02:16:43PM -0500, Vince Weaver wrote:
> On Wed, 5 Feb 2014, Peter Zijlstra wrote:
>
> > P6 class machines can die hard when PCE gets enabled due to CPU
> > errata. The safe way it so disable it by default and keep it disabled.
> >
> > See errata 26:
>
> so you take an errata applicable to a subset of Pentium Pro steppings and
> apply it to the whole p6 line (which includes the whole way up to Pentium
> III)?
>
> Or am I missing something in the documentation you link to?

I forgot it went all the way to P-III, let me try and find the other
erratas.
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