Re: [PATCH V4 1/2] perf & kvm: Enhance perf to collect KVM guest os statistics from host side

[Avi Kivity <avi@redhat.com>]

On 04/16/2010 10:34 AM, Zhang, Yanmin wrote:
> Below is the kernel patch to enable perf to collect guest os statistics.
>
> Joerg,
>
> Would you like to add support on svm? I don't know the exact point to trigger
> NMI to host with svm.
>
> See below code with vmx:
>
> +		kvm_before_handle_nmi(&vmx->vcpu);
>   		asm("int $2");
> +		kvm_after_handle_nmi(&vmx->vcpu);
>
> Signed-off-by: Zhang Yanmin<yanmin_zhang@linux.intel.com>
>    

Can you please split it further?

Patch 1 introduces perf_register_guest_info_callbacks() and related.  
Ingo can merge this into a branch in tip.git.
Patch 2 is just the kvm bits, I'll apply that after merging the branch 
with patch 1.
Patch 3 adds the tools/perf changes.

This way perf development can continue on tip.git, and kvm development 
can continue on kvm.git, without the code bases diverging and requiring 
a merge later.

-- 
Do not meddle in the internals of kernels, for they are subtle and quick to panic.