Shaohua Li wrote:
>>
>>> 1. vmcs_readl/vmcs_writel are called with preempt enabled
>>>
>>>
>> Why is that bad?
>>
> 1. raw_smp_processor_id()
> 2. migrate to other cpu
> 3. current->kvm_vcpu->cpu != the cpu id of step 1.
> you will see the warning.
>
Ah, that code is gone from preempt-hooks, hence I didn't understand you.
The current version of the patchset does not change
vmcs_readl/vmcs_writel. So I think everything is safe.
--
Do not meddle in the internals of kernels, for they are subtle and quick to panic.
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