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

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Message-ID: <20140205192012.GL2936@laptop.programming.kicks-ass.net>
Date:	Wed, 5 Feb 2014 20:20:12 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Vince Weaver <vince@...ter.net>
Cc:	junk@...af.co.uk, alan@...rguk.ukuu.org.uk,
	Ingo Molnar <mingo@...nel.org>,
	Stephane Eranian <eranian@...gle.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] perf,x86,p6: Add userspace RDPMC quirk for P6

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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