linux-kernel - Re: [PATCH 3/5] perf, x86: Disable PEBS on clowertown chips

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Date:	Fri, 05 Mar 2010 22:35:33 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Stephane Eranian <eranian@...gle.com>
Cc:	mingo@...e.hu, linux-kernel@...r.kernel.org, paulus@...ba.org,
	robert.richter@....com, fweisbec@...il.com,
	Arnaldo Carvalho de Melo <acme@...radead.org>
Subject: Re: [PATCH 3/5] perf, x86: Disable PEBS on clowertown chips

On Fri, 2010-03-05 at 13:22 -0800, Stephane Eranian wrote:
> > The two serious ones, AJ106 and AJ68 are no fix and are listed as such
> > in all errata I can find, including the 7[23]00 series.
> >
> Not E74xx. I think it would be fine to drop LBR with PEBS as the work-around
> to AJ106.
> 
> > I checked the 65nm Core2Duo, Xeon 5200 and Xeon 7[23]00 spec updates.
> > Going by that it seems the full model 15 family is broken and I'll leave
> > the patch as is.
> 
> But the E74xx are okay and you are excluding them. Worst case you should
> provide an override.

>>From what I can tell E74xx is model 29, which would be just fine with
this patch, this patch only marks model 15 as broken.



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