Re: [PATCH -tip] perf, x86: Make a second write to performancecounter if needed

[Peter Zijlstra]

On Thu, 2010-06-03 at 01:23 +0400, Cyrill Gorcunov wrote:
> On Netburst PMU we need a second write to a performance counter
> due to cpu erratum.
> 
> A simple flag test instead of alternative instructions was choosen
> because wrmsrl is already a macro and if virtualization is turned
> on will need an additional wrapper call which is more expencise.
> 
> nb: we should propably switch to jump-labels as only this facility
> reach the mainline.

OK. Thanks Cyrill.


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