Re: [RFC] para virt interface of perf to support kvm guest os statisticscollection in guest os

[Avi Kivity]

On 06/10/2010 05:21 AM, Zhang, Yanmin wrote:
> > I see.  So put it in a union.  Or perhaps not even in a union - what if
> > a kvm guest is also acting as a kvm host?
> >      
> My patch has consideration on it. I compiled kernel with host and guest support
> at the same time. The accessing to perf_event->shadow is really under specific
> scenarios, or they are just in specific functions. These functions are called
> just bu host kernel , or just by guest kernel.
>    

But a kernel can be both guest and host at the same time.  Currently 
this only works on AMD, but there was some work to bring it to Intel as 
well.


--
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.

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