Re: [Xen-devel] [PATCH] Intel/vpmu: Use Intel VPMU quirk on all family 6 processors

[George Dunlap <George.Dunlap@xxxxxxxxxxxxx>]

On Thu, May 9, 2013 at 9:45 PM, Boris Ostrovsky
<boris.ostrovsky@xxxxxxxxxx> wrote:
> On 05/09/2013 04:34 PM, Boris Ostrovsky wrote:
>>
>> Currently only a few Intel models have VPMU workaround turned on. It
>> appears, however, that this issue exists on more models than what is
>> covered by check_pmc_quirk(). Since we don't know exactly which cpus
>> are affected we should turn this workaround on for all family 6
>> processors.
>
>
> Haitao,
>
> A few weeks ago we had an email thread about this issue
> (http://lists.xen.org/archives/html/xen-devel/2013-03/msg02618.html)
> Did you have a chance to clarify with your HW folks what this is?
>
> We kept hitting this on various models which is why I am suggesting this
> patch (and I think it should be considered for 4.3).

In principle it's a bug fix, and fine for 4.3.  But it would be good
to get some feedback from someone at Intel.

 -George

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